/* =========================================================
   My Week at CERN — styles
   ========================================================= */

:root {
  --bg: #04060f;
  --bg-2: #0a1024;
  --ink: #e9edf8;
  --muted: #9aa4c2;
  --dim: #5f6886;
  --line: rgba(255, 255, 255, .09);
  --line-2: rgba(255, 255, 255, .16);
  --card: rgba(16, 22, 44, .55);
  --card-2: rgba(255, 255, 255, .06);

  --beam: #4cc9f0;
  --blue: #4d7cff;
  --violet: #9b6bff;
  --pink: #ff5fa2;
  --hot: #ff7a3d;
  --gold: #ffd166;
  --green: #2ee59d;
  --red: #ff4d6d;

  --grad: linear-gradient(100deg, #7df9ff 0%, #4cc9f0 30%, #9b6bff 65%, #ff5fa2 100%);
  --radius: 22px;
  --radius-sm: 14px;
  --top: 64px;
  --pager: 76px;

  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --display: 'Manrope', 'Inter', system-ui, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  --ease: cubic-bezier(.2, .8, .2, 1);
}

/* ---------- language switching ---------- */
html[lang="el"] t-en, html[lang="en"] t-el,
html[lang="el"] .en, html[lang="en"] .el { display: none; }

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 700px at 10% -10%, rgba(77, 124, 255, .18), transparent 60%),
    radial-gradient(900px 600px at 110% 110%, rgba(155, 107, 255, .14), transparent 60%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
h1, h2, h3, h4 { font-family: var(--display); line-height: 1.12; margin: 0 0 .5em; letter-spacing: -.02em; }
p { margin: 0 0 1em; }
a { color: var(--beam); }
strong { color: #fff; font-weight: 600; }
em { color: #cfd6ee; }
button { font: inherit; color: inherit; }
svg { display: block; }
::selection { background: rgba(76, 201, 240, .35); }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  background-size: 200% 100%;
  animation: gradShift 8s ease-in-out infinite alternate;
}
@keyframes gradShift { to { background-position: 100% 0; } }

/* ---------- background canvas & sweep ---------- */
#bg { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }

.sweep {
  position: fixed; left: 0; right: 0; top: 50%; height: 2px; z-index: 60; pointer-events: none;
  background: linear-gradient(90deg, transparent, #fff 40%, var(--beam) 60%, transparent);
  box-shadow: 0 0 24px 6px rgba(76, 201, 240, .6), 0 0 80px 20px rgba(155, 107, 255, .25);
  transform: translateX(-110%) scaleY(1);
  opacity: 0;
}
.sweep.go { animation: sweep .75s var(--ease); }
.sweep.go.rev { animation-name: sweepRev; }
@keyframes sweep {
  0% { transform: translateX(-110%); opacity: 0; }
  15% { opacity: 1; }
  100% { transform: translateX(110%); opacity: 0; }
}
@keyframes sweepRev {
  0% { transform: translateX(110%); opacity: 0; }
  15% { opacity: 1; }
  100% { transform: translateX(-110%); opacity: 0; }
}

/* ---------- top bar ---------- */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40;
  height: calc(var(--top) + env(safe-area-inset-top));
  padding: env(safe-area-inset-top) max(16px, env(safe-area-inset-right)) 0 max(16px, env(safe-area-inset-left));
  display: flex; align-items: center; gap: 16px;
  background: linear-gradient(180deg, rgba(4, 6, 15, .85), rgba(4, 6, 15, .4) 70%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-family: var(--display); font-weight: 800; letter-spacing: .02em; font-size: 15px; white-space: nowrap; }
.brand b { color: var(--beam); margin: 0 3px; font-weight: 800; }
.brand svg { width: 30px; height: 30px; fill: none; stroke: var(--beam); stroke-width: 1.6; }
.brand svg .orbit-dot { fill: #fff; stroke: none; transform-origin: 20px 20px; animation: spin 3s linear infinite; filter: drop-shadow(0 0 3px #fff); }
@keyframes spin { to { transform: rotate(360deg); } }

.chapter-title {
  flex: 1; text-align: center; font-family: var(--mono); font-size: 12px; color: var(--muted);
  letter-spacing: .08em; text-transform: uppercase; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  transition: opacity .3s;
}
.chapter-title b { color: var(--beam); font-weight: 600; margin-right: 8px; }
.top-actions { display: flex; align-items: center; gap: 8px; }

.lang-btn, .menu-btn, .chip-btn {
  height: 38px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .04);
  cursor: pointer; display: inline-flex; align-items: center; justify-content: center; transition: background .2s, border-color .2s, transform .2s;
}
.lang-btn:hover, .menu-btn:hover, .chip-btn:hover { background: rgba(255, 255, 255, .1); border-color: rgba(76, 201, 240, .5); }
.lang-btn { padding: 3px; gap: 2px; font-family: var(--mono); font-size: 12px; font-weight: 600; }
.lang-btn span { padding: 6px 9px; border-radius: 999px; color: var(--dim); transition: all .25s; }
html[lang="en"] .lang-btn [data-code="en"], html[lang="el"] .lang-btn [data-code="el"] { background: var(--beam); color: #04121c; }
.menu-btn { width: 38px; }
.menu-btn svg { width: 22px; height: 22px; fill: none; stroke: var(--ink); stroke-width: 1.5; }
.menu-btn svg .fill { fill: var(--beam); stroke: none; }
.menu-btn:hover svg { animation: spin 2.5s linear infinite; }
.chip-btn { padding: 0 14px; gap: 6px; font-size: 13px; font-weight: 600; background: rgba(76, 201, 240, .14); border-color: rgba(76, 201, 240, .45); }
.chip-btn svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }

.progress { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: rgba(255, 255, 255, .05); }
.progress i { position: absolute; left: 0; top: 0; bottom: 0; width: 0; background: var(--grad); transition: width .8s var(--ease); box-shadow: 0 0 12px rgba(76, 201, 240, .8); }
.progress i::after { content: ''; position: absolute; right: -3px; top: -3px; width: 8px; height: 8px; border-radius: 50%; background: #fff; box-shadow: 0 0 10px 3px var(--beam); }

/* ---------- chapters ---------- */
#chapters { position: fixed; inset: 0; z-index: 1; }
.chapter {
  position: absolute; inset: 0; overflow-y: auto; overflow-x: hidden;
  padding: calc(var(--top) + env(safe-area-inset-top) + 28px) 0 calc(var(--pager) + env(safe-area-inset-bottom) + 40px);
  display: none; scrollbar-width: thin; scrollbar-color: rgba(255, 255, 255, .15) transparent;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
}
.chapter.active { display: block; }
.chapter.entering .inner { animation: chapterIn .8s var(--ease) both; }
.chapter.leaving { display: block; pointer-events: none; }
.chapter.leaving .inner { animation: chapterOut .4s ease-in both; }
@keyframes chapterIn {
  from { opacity: 0; transform: translateX(calc(var(--dir, 1) * 60px)) scale(.98); filter: blur(8px); }
  to { opacity: 1; transform: none; filter: none; }
}
@keyframes chapterOut {
  to { opacity: 0; transform: translateX(calc(var(--dir, 1) * -60px)) scale(.98); filter: blur(8px); }
}
.inner { position: relative; max-width: 1180px; margin: 0 auto; padding: 0 max(16px, env(safe-area-inset-left)) 0 max(16px, env(safe-area-inset-right)); }
@media (min-width: 720px) { .inner { padding: 0 32px; } }

/* reveal on scroll */
.rv { opacity: 0; transform: translateY(26px); }
.rv.in { opacity: 1; transform: none; transition: opacity .8s var(--ease), transform .8s var(--ease); transition-delay: calc(var(--i, 0) * 70ms); }

/* ---------- typography blocks ---------- */
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--beam); margin-bottom: 14px; }
.ch-head { max-width: 820px; margin-bottom: 36px; }
.ch-head h2 { font-size: clamp(34px, 6vw, 64px); font-weight: 800; }
.lead { font-size: clamp(16px, 2vw, 19px); color: #c4cbe0; line-height: 1.65; }
.section-title { font-size: clamp(22px, 3vw, 32px); margin: 64px 0 20px; font-weight: 800; }
.note { color: var(--muted); max-width: 760px; }
.muted { color: var(--muted); }
.small { font-size: 13.5px; line-height: 1.55; }
.caption { color: var(--muted); font-size: 13.5px; margin: 12px 0 0; }

/* ---------- cards & grids ---------- */
.card {
  position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .04) inset, 0 20px 50px -30px rgba(0, 0, 0, .8);
}
.card + .card { margin-top: 20px; }
.card h3 { font-size: 22px; }
.card h4 { font-size: 17px; margin-bottom: 8px; }
.card p:last-child { margin-bottom: 0; }

.grid-2 { display: grid; gap: 20px; grid-template-columns: 1fr; margin-bottom: 20px; }
.grid-3 { display: grid; gap: 18px; grid-template-columns: 1fr; }
.grid-4 { display: grid; gap: 16px; grid-template-columns: 1fr 1fr; }
@media (min-width: 700px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 900px) {
  .grid-2 { grid-template-columns: 1.1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}
.grid-3 .card + .card, .grid-4 .card + .card { margin-top: 0; }

/* ---------- buttons ---------- */
.btn {
  --h: 48px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: var(--h); padding: 0 22px;
  border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .06); color: var(--ink);
  font-weight: 600; font-size: 15px; text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: transform .2s var(--ease), background .2s, border-color .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); background: rgba(255, 255, 255, .11); border-color: rgba(76, 201, 240, .5); }
.btn:active { transform: translateY(0) scale(.97); }
.btn-primary {
  background: linear-gradient(100deg, #3aa9ff, #7b5cff); border-color: transparent; color: #fff;
  box-shadow: 0 10px 30px -10px rgba(91, 120, 255, .8), inset 0 1px 0 rgba(255, 255, 255, .25);
}
.btn-primary:hover { background: linear-gradient(100deg, #52b6ff, #8d72ff); box-shadow: 0 14px 36px -10px rgba(91, 120, 255, .95), inset 0 1px 0 rgba(255, 255, 255, .3); }
.btn-ghost { background: transparent; }
.btn-small { --h: 38px; padding: 0 16px; font-size: 13.5px; }
.btn-block { width: 100%; }
.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.btn[disabled] { opacity: .45; pointer-events: none; }
.kbd { display: inline-grid; place-items: center; min-width: 26px; height: 24px; padding: 0 6px; border-radius: 6px; border: 1px solid var(--line-2); border-bottom-width: 2px; font-family: var(--mono); font-size: 12px; margin-right: 4px; color: var(--ink); }

/* ---------- INTRO ---------- */
.intro { position: fixed; inset: 0; z-index: 100; background: #02030a; display: grid; place-items: center; transition: opacity .9s ease, visibility .9s; }
.intro.done { opacity: 0; visibility: hidden; pointer-events: none; }
.intro canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.intro-ui { position: relative; text-align: center; padding: 16px; transition: opacity .5s, transform .5s; }
.intro.running .intro-ui .intro-go, .intro.running .intro-logo, .intro.running .intro-kicker { opacity: 0; transform: scale(.9); pointer-events: none; }
.intro-logo, .intro-kicker, .intro-go { transition: opacity .5s, transform .5s; }
.intro-logo svg { width: 120px; height: 120px; margin: 0 auto 18px; fill: none; stroke: var(--beam); stroke-width: 1.2; filter: drop-shadow(0 0 12px rgba(76, 201, 240, .6)); animation: breathe 3s ease-in-out infinite; }
@keyframes breathe { 50% { transform: scale(1.05); filter: drop-shadow(0 0 22px rgba(76, 201, 240, .9)); } }
.intro-kicker { font-family: var(--mono); letter-spacing: .2em; text-transform: uppercase; color: var(--muted); font-size: 12px; margin-bottom: 26px; }
.intro-go { --h: 56px; font-size: 16px; padding: 0 30px; }
.pulse-dot { width: 10px; height: 10px; border-radius: 50%; background: #fff; box-shadow: 0 0 0 0 rgba(255, 255, 255, .7); animation: pulse 1.6s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 12px rgba(255, 255, 255, 0); } 100% { box-shadow: 0 0 0 0 rgba(255, 255, 255, 0); } }
.intro-status { position: absolute; left: 0; right: 0; top: calc(100% + 30px); font-family: var(--mono); color: var(--beam); font-size: 14px; letter-spacing: .1em; min-height: 1.5em; text-shadow: 0 0 12px rgba(76, 201, 240, .8); }
.intro.running .intro-status { position: fixed; top: auto; bottom: 18vh; }
.intro-skip { position: absolute; right: 20px; bottom: calc(20px + env(safe-area-inset-bottom)); background: none; border: 0; color: var(--dim); cursor: pointer; font-size: 13px; letter-spacing: .08em; }
.intro-skip:hover { color: var(--ink); }

/* ---------- HOME ---------- */
.chapter-home { display: none; }
.chapter-home.active { display: flex; align-items: center; }
.hero-canvas { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.hero { z-index: 1; text-align: center; display: flex; flex-direction: column; align-items: center; width: 100%; }
.hero-title { font-size: clamp(44px, 10vw, 118px); font-weight: 800; letter-spacing: -.04em; margin-bottom: 20px; line-height: 1; }
.hero-title t-en, .hero-title t-el { display: block; font-size: .42em; font-weight: 600; letter-spacing: -.01em; color: #cdd5ee; margin-bottom: 6px; }
html[lang="el"] .hero-title t-en, html[lang="en"] .hero-title t-el { display: none; }
.hero-title .grad-text { filter: drop-shadow(0 0 40px rgba(76, 201, 240, .35)); }
.hero .lead { max-width: 640px; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 10px 0 44px; }
.ticker { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; max-width: 860px; width: 100%; backdrop-filter: blur(12px); }
.ticker > div { background: rgba(8, 12, 28, .75); padding: 16px 12px; text-align: center; }
.ticker b { font-family: var(--display); font-size: clamp(22px, 3.2vw, 30px); font-weight: 800; }
.ticker span { white-space: nowrap; color: var(--beam); font-family: var(--mono); font-size: 14px; margin-left: 4px; }
.ticker small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 2px; }
@media (min-width: 720px) { .ticker { grid-template-columns: repeat(4, 1fr); } }
.hint { color: var(--dim); font-size: 13px; margin: 26px 0 6px; }
.byline { color: var(--dim); font-size: 13px; font-family: var(--mono); }

/* ---------- CERN chapter ---------- */
.map-card { padding: 16px; }
.cern-map { width: 100%; height: auto; }
.cern-map .lake { fill: rgba(77, 124, 255, .22); stroke: rgba(77, 124, 255, .5); }
.cern-map .border { fill: none; stroke: rgba(255, 209, 102, .7); stroke-width: 2; stroke-dasharray: 6 6; }
.cern-map .ring { fill: none; stroke-width: 3; }
.cern-map .lhc { stroke: var(--beam); filter: drop-shadow(0 0 6px rgba(76, 201, 240, .8)); }
.cern-map .sps { stroke: var(--violet); stroke-width: 2.4; }
.cern-map .beam-dot, .fcc-art .beam-dot { fill: #fff; filter: drop-shadow(0 0 6px #fff) drop-shadow(0 0 12px var(--beam)); }
.cern-map .site { fill: var(--hot); stroke: #fff; stroke-width: 2; }
.map-label { fill: #cbd3ea; font-family: var(--font); font-size: 13px; }
.map-label.strong { font-weight: 700; fill: #fff; }
.map-label.big { font-family: var(--display); font-weight: 800; font-size: 20px; fill: rgba(255, 255, 255, .28); letter-spacing: .08em; text-transform: uppercase; }
.map-label.lake-label { fill: #9db4ff; font-size: 12px; text-anchor: middle; }
.map-label.ring-label { font-family: var(--mono); font-size: 12px; fill: var(--beam); }

.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 18px 16px; backdrop-filter: blur(12px); }
.stat b { display: block; font-family: var(--display); font-size: clamp(26px, 3.4vw, 36px); font-weight: 800; line-height: 1.1; }
.stat b small { font-size: .5em; color: var(--beam); margin-left: 4px; font-weight: 700; }
.stat span { color: var(--muted); font-size: 13.5px; line-height: 1.4; display: block; margin-top: 6px; }
.stat.hl { border-color: rgba(76, 201, 240, .5); background: linear-gradient(160deg, rgba(76, 201, 240, .16), rgba(16, 22, 44, .55)); }

.coffee { display: flex; gap: 24px; align-items: center; }
.coffee-cup svg { width: 110px; height: 92px; fill: none; stroke: var(--gold); stroke-width: 3; stroke-linecap: round; }
.coffee-cup .steam { stroke: rgba(255, 255, 255, .5); stroke-width: 2.4; animation: steam 2.6s ease-in-out infinite; }
.coffee-cup .s2 { animation-delay: .5s; } .coffee-cup .s3 { animation-delay: 1s; }
@keyframes steam { 0% { opacity: 0; transform: translateY(6px); } 50% { opacity: 1; } 100% { opacity: 0; transform: translateY(-8px); } }
@media (max-width: 600px) { .coffee { flex-direction: column; align-items: flex-start; } }

.feature .icon { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; background: rgba(76, 201, 240, .12); border: 1px solid rgba(76, 201, 240, .3); margin-bottom: 16px; }
.feature .icon svg { width: 24px; height: 24px; fill: none; stroke: var(--beam); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.feature .icon svg .fill { fill: #fff; stroke: none; }
.feature p { color: var(--muted); font-size: 14.5px; }

.questions { display: grid; gap: 12px; grid-template-columns: 1fr; margin-bottom: 18px; }
@media (min-width: 700px) { .questions { grid-template-columns: 1fr 1fr; } }
.q { display: flex; align-items: center; gap: 14px; padding: 16px 18px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: linear-gradient(100deg, rgba(155, 107, 255, .12), rgba(16, 22, 44, .4)); font-weight: 600; font-family: var(--display); font-size: 17px; }
.q span { flex: none; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--grad); color: #0b0f22; font-weight: 800; }

/* ---------- SCALE ---------- */
.zoom-card { padding: 0; overflow: hidden; display: grid; grid-template-columns: 1fr; }
@media (min-width: 900px) { .zoom-card { grid-template-columns: 1.35fr 1fr; } }
.zoom-stage { position: relative; aspect-ratio: 1 / 1; max-height: 70vh; width: 100%; background: radial-gradient(circle at 50% 50%, #0d1636, #03050d 75%); cursor: zoom-in; touch-action: pan-y; }
@media (min-width: 900px) { .zoom-stage { aspect-ratio: auto; min-height: 520px; max-height: none; } }
.zoom-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.zoom-label { position: absolute; left: 20px; top: 18px; display: flex; flex-direction: column; }
.zoom-size { font-family: var(--display); font-weight: 800; letter-spacing: -.01em; font-size: clamp(26px, 4vw, 40px); color: #fff; text-shadow: 0 0 20px rgba(76, 201, 240, .6); }
.zoom-name { color: var(--beam); font-weight: 600; font-size: 15px; }
.cern-tag { position: absolute; right: 16px; bottom: 18px; padding: 8px 14px; border-radius: 999px; background: var(--hot); color: #1b0b02; font-weight: 700; font-size: 13px; opacity: 0; transform: translateY(10px); transition: all .4s var(--ease); box-shadow: 0 0 30px rgba(255, 122, 61, .6); }
.cern-tag.show { opacity: 1; transform: none; }
.zoom-controls { padding: 24px; display: flex; flex-direction: column; gap: 18px; }
.zoom-steps { display: flex; justify-content: space-between; gap: 4px; }
.zoom-steps button { flex: 1; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); border-radius: 10px; padding: 8px 2px; font-size: 11.5px; color: var(--muted); cursor: pointer; transition: all .2s; line-height: 1.2; }
.zoom-steps button.on { color: #fff; border-color: var(--beam); background: rgba(76, 201, 240, .15); }
.zoom-desc { color: #c4cbe0; min-height: 5.2em; margin: 0; }
.logbar-track { position: relative; height: 34px; border-radius: 10px; background: linear-gradient(90deg, rgba(255, 77, 109, .35) 0 28%, rgba(255, 255, 255, .06) 28% 55%, rgba(76, 201, 240, .15) 55% 100%); overflow: hidden; }
.logbar-track .zone { position: absolute; top: 50%; transform: translateY(-50%); font-size: 11px; font-weight: 600; letter-spacing: .04em; color: #fff; }
.zone.acc { left: 8px; } .zone.mic { left: 32%; } .zone.eye { left: 78%; }
.logbar-track i { position: absolute; top: 0; bottom: 0; width: 3px; margin-left: -1.5px; background: #fff; box-shadow: 0 0 10px 2px #fff; transition: left .15s linear; }
.logbar-ticks { display: flex; justify-content: space-between; font-family: var(--font); font-size: 10.5px; color: var(--dim); margin-top: 6px; }

input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 30px; background: transparent; cursor: pointer; touch-action: none; }
input[type=range]::-webkit-slider-runnable-track { height: 6px; border-radius: 6px; background: linear-gradient(90deg, var(--beam), var(--violet)); }
input[type=range]::-moz-range-track { height: 6px; border-radius: 6px; background: linear-gradient(90deg, var(--beam), var(--violet)); }
input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 24px; height: 24px; margin-top: -9px; border-radius: 50%; background: #fff; border: 4px solid var(--beam); box-shadow: 0 0 16px rgba(76, 201, 240, .9); }
input[type=range]::-moz-range-thumb { width: 18px; height: 18px; border-radius: 50%; background: #fff; border: 4px solid var(--beam); box-shadow: 0 0 16px rgba(76, 201, 240, .9); }

/* ---------- STANDARD MODEL ---------- */
.sm-wrap { display: grid; gap: 22px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 980px) { .sm-wrap { grid-template-columns: 1.15fr 1fr; } }
.sm-legend { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.sm-legend button { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); cursor: pointer; font-size: 13px; color: var(--muted); }
.sm-legend button i { width: 10px; height: 10px; border-radius: 3px; }
.sm-legend [data-group=quark] i { background: var(--violet); }
.sm-legend [data-group=lepton] i { background: var(--green); }
.sm-legend [data-group=boson] i { background: var(--hot); }
.sm-legend [data-group=higgs] i { background: var(--gold); }
.sm-legend button:hover { color: #fff; border-color: var(--line-2); }

.sm-grid { display: grid; grid-template-columns: repeat(5, 1fr); grid-template-rows: repeat(4, auto); gap: 8px; }
.sm-grid.dim-others .pc:not(.grp-hl) { opacity: .25; filter: saturate(.3); }
.pc {
  --c: var(--violet);
  position: relative; aspect-ratio: 1 / 1.05; border-radius: 14px; cursor: pointer; padding: 6px;
  border: 1px solid color-mix(in srgb, var(--c) 45%, transparent);
  background: linear-gradient(160deg, color-mix(in srgb, var(--c) 26%, transparent), rgba(10, 14, 30, .7));
  display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center;
  transition: transform .25s var(--ease), box-shadow .25s, opacity .3s, filter .3s, border-color .2s;
}
.pc:hover { transform: translateY(-3px) scale(1.04); box-shadow: 0 10px 30px -8px color-mix(in srgb, var(--c) 70%, transparent); z-index: 2; }
.pc.sel { border-color: #fff; box-shadow: 0 0 0 2px var(--c), 0 0 30px color-mix(in srgb, var(--c) 70%, transparent); }
.pc .sym { font-family: 'Times New Roman', Georgia, serif; font-style: italic; font-size: clamp(22px, 4vw, 34px); line-height: 1; color: #fff; }
.pc .nm { font-size: clamp(9px, 1.2vw, 11.5px); color: #d4daf0; margin-top: 4px; line-height: 1.1; }
.pc .ms { position: absolute; left: 6px; top: 4px; font-family: var(--mono); font-size: 9px; color: rgba(255, 255, 255, .55); display: none; }
.pc .ch { position: absolute; right: 6px; top: 4px; font-family: var(--mono); font-size: 9px; color: rgba(255, 255, 255, .55); display: none; }
@media (min-width: 600px) { .pc .ms, .pc .ch { display: block; } }
.pc.quark { --c: var(--violet); } .pc.lepton { --c: var(--green); } .pc.boson { --c: var(--hot); } .pc.higgs { --c: var(--gold); grid-row: 1 / span 4; grid-column: 5; aspect-ratio: auto; }
.pc.higgs .sym { font-size: clamp(30px, 6vw, 54px); }

.sm-detail { min-height: 360px; }
.sm-detail .d-head { display: flex; align-items: center; gap: 18px; margin-bottom: 16px; }
.sm-detail .d-sym { width: 84px; height: 84px; flex: none; border-radius: 22px; display: grid; place-items: center; font-family: 'Times New Roman', Georgia, serif; font-style: italic; font-size: 48px; color: #fff; background: linear-gradient(160deg, color-mix(in srgb, var(--c) 60%, transparent), rgba(10, 14, 30, .8)); box-shadow: 0 0 40px color-mix(in srgb, var(--c) 50%, transparent); animation: popIn .5s var(--ease); }
@keyframes popIn { from { transform: scale(.6) rotate(-10deg); opacity: 0; } }
.sm-detail h3 { margin: 0; font-size: 26px; }
.sm-detail .d-type { color: var(--c); font-family: var(--mono); font-size: 12px; text-transform: uppercase; letter-spacing: .1em; }
.props { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0 0 16px; }
.props div { background: rgba(255, 255, 255, .04); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.props dt { font-size: 11px; color: var(--dim); text-transform: uppercase; letter-spacing: .08em; }
.props dd { margin: 2px 0 0; font-family: var(--mono); font-weight: 600; font-size: 15px; }
.massbar { margin: 4px 0 18px; }
.massbar-track { position: relative; height: 8px; border-radius: 8px; background: linear-gradient(90deg, #1a2040, var(--c)); }
.massbar-track i { position: absolute; top: 50%; width: 16px; height: 16px; border-radius: 50%; background: #fff; transform: translate(-50%, -50%); box-shadow: 0 0 14px var(--c); transition: left .6s var(--ease); }
.massbar-labels { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 10.5px; color: var(--dim); margin-top: 6px; }
.sm-detail .d-fact { color: #cdd4ea; }
.sm-detail .d-disc { font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 12px; margin-top: 14px; }
.sm-detail .d-disc b { color: var(--gold); }

.family .fam { text-align: left; }
.fam .tag { display: inline-block; font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 999px; margin-bottom: 12px; letter-spacing: .02em; }
.tag.bad { background: rgba(255, 77, 109, .15); color: #ff8fa3; }
.tag.mid { background: rgba(255, 209, 102, .14); color: var(--gold); }
.tag.ok { background: rgba(46, 229, 157, .16); color: var(--green); }
.fam p { color: var(--muted); font-size: 14px; }
.fam.good { border-color: rgba(46, 229, 157, .55); background: linear-gradient(160deg, rgba(46, 229, 157, .14), rgba(16, 22, 44, .55)); box-shadow: 0 0 40px -10px rgba(46, 229, 157, .4); }

.hydrogen { display: flex; gap: 32px; align-items: center; margin-top: 20px; }
@media (max-width: 640px) { .hydrogen { flex-direction: column; align-items: flex-start; } }
.h-atom { position: relative; width: 150px; height: 150px; flex: none; }
.h-nucleus { position: absolute; left: 50%; top: 50%; width: 46px; height: 46px; margin: -23px 0 0 -23px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #ff9aa8, #e0243f 60%, #7a0a1c); display: grid; place-items: center; font-weight: 700; font-size: 14px; box-shadow: 0 0 30px rgba(255, 77, 109, .6); transition: transform .6s var(--ease), box-shadow .6s; }
.h-orbit { position: absolute; inset: 0; border: 1px dashed rgba(255, 255, 255, .25); border-radius: 50%; animation: spin 3s linear infinite; transition: opacity .6s; }
.h-electron { position: absolute; top: -14px; left: 50%; margin-left: -14px; width: 28px; height: 28px; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #bdf2ff, #2aa6d6); display: grid; place-items: center; font-size: 11px; font-weight: 700; color: #03202b; box-shadow: 0 0 16px rgba(76, 201, 240, .9); transition: transform 1s var(--ease), opacity 1s; }
.h-atom.stripped .h-electron { transform: translate(260px, -140px) scale(.4); opacity: 0; }
.h-atom.stripped .h-orbit { opacity: 0; }
.h-atom.stripped .h-nucleus { transform: scale(1.2); box-shadow: 0 0 60px rgba(255, 77, 109, .95); animation: jitter .15s linear infinite; }
@keyframes jitter { 50% { transform: scale(1.2) translateX(1px); } }

/* ---------- ACCELERATORS (LHC facts) ---------- */
.fact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-bottom: 20px; }
@media (min-width: 900px) { .fact-grid { grid-template-columns: repeat(3, 1fr); } }
.fact { padding: 20px; border-radius: var(--radius-sm); border: 1px solid var(--line); background: var(--card); backdrop-filter: blur(12px); transition: transform .3s var(--ease), border-color .3s; }
.fact:hover { transform: translateY(-4px); border-color: rgba(76, 201, 240, .45); }
.fact b { font-family: var(--display); font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.fact small { color: var(--beam); font-family: var(--mono); margin-left: 6px; }
.fact p { color: var(--muted); font-size: 13.5px; margin: 4px 0 0; }

.mosquito { display: flex; gap: 24px; align-items: center; }
@media (max-width: 640px) { .mosquito { flex-direction: column; align-items: flex-start; } }
.mosquito-art svg { width: 160px; height: 100px; fill: none; stroke: #cfd6ee; stroke-width: 2; stroke-linecap: round; }
.mosquito-art .mq { animation: hover 1.4s ease-in-out infinite; }
.mosquito-art .wing { fill: rgba(76, 201, 240, .15); stroke: rgba(76, 201, 240, .7); transform-origin: 80px 50px; animation: flap .08s linear infinite alternate; }
@keyframes flap { to { transform: scaleY(.3); } }
@keyframes hover { 50% { transform: translate(4px, -5px); } }

.meters { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 6px 0 12px; }
.meter { background: rgba(255, 255, 255, .04); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; }
.meter span { display: block; font-size: 11px; color: var(--dim); text-transform: uppercase; letter-spacing: .08em; }
.meter b { font-family: var(--mono); font-size: clamp(17px, 2.2vw, 22px); color: #fff; white-space: nowrap; }

/* ---------- DETECTORS ---------- */
.det-wrap { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 980px) { .det-wrap { grid-template-columns: 1.4fr 1fr; } }
.det-stage { padding: 0; overflow: hidden; aspect-ratio: 1 / 1; background: radial-gradient(circle, #0c1330, #03050d 80%); }
.det-stage canvas { width: 100%; height: 100%; display: block; }
.det-tooltip { position: absolute; pointer-events: none; padding: 5px 10px; border-radius: 8px; background: rgba(4, 6, 15, .9); border: 1px solid var(--line-2); font-size: 12.5px; opacity: 0; transition: opacity .15s; white-space: nowrap; }
.det-side { display: flex; flex-direction: column; gap: 14px; }
.det-side .card + .card { margin-top: 0; }
.particle-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.particle-buttons button { display: flex; align-items: center; gap: 10px; padding: 11px 12px; border-radius: 12px; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); cursor: pointer; font-size: 13.5px; font-weight: 600; text-align: left; transition: all .2s; }
.particle-buttons button:hover { border-color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent); transform: translateY(-2px); }
.particle-buttons button.on { border-color: var(--c); background: color-mix(in srgb, var(--c) 20%, transparent); }
.particle-buttons i { flex: none; width: 22px; height: 3px; border-radius: 2px; background: var(--c); box-shadow: 0 0 8px var(--c); }
.particle-buttons i.dash { background: repeating-linear-gradient(90deg, var(--c) 0 5px, transparent 5px 8px); }
.particle-buttons i.dot { background: repeating-linear-gradient(90deg, var(--c) 0 2px, transparent 2px 5px); box-shadow: none; }
.det-info { font-size: 14.5px; min-height: 120px; }
.det-info h4 { color: var(--c, #fff); }
.det-info p { color: var(--muted); }
.layer-legend { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; font-size: 12.5px; color: var(--muted); }
.layer-legend li { display: flex; align-items: center; gap: 8px; }
.layer-legend i { width: 12px; height: 12px; border-radius: 3px; flex: none; }

.exp-grid .exp { display: flex; flex-direction: column; transition: transform .3s var(--ease), border-color .3s; }
.exp:hover { transform: translateY(-4px); border-color: var(--line-2); }
.exp-top { display: flex; justify-content: space-between; align-items: center; }
.exp-top h4 { font-size: 22px; font-weight: 800; margin: 0; }
.exp-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--c); box-shadow: 0 0 12px var(--c); }
.exp p { color: var(--muted); font-size: 14px; margin: 12px 0 16px; flex: 1; }
.exp dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin: 0; }
.exp dt { font-size: 10.5px; color: var(--dim); text-transform: uppercase; letter-spacing: .06em; }
.exp dd { margin: 0; font-family: var(--mono); font-size: 13px; font-weight: 600; }
.exp.visited { border-color: rgba(255, 122, 61, .6); background: linear-gradient(160deg, rgba(255, 122, 61, .16), rgba(16, 22, 44, .55)); }
.badge { position: absolute; top: -12px; right: 14px; padding: 4px 12px; border-radius: 999px; background: var(--hot); color: #1b0b02; font-size: 12px; font-weight: 700; box-shadow: 0 0 20px rgba(255, 122, 61, .6); }
@media (max-width: 600px) { .exp-grid { grid-template-columns: 1fr; } }

/* ---------- BEYOND ---------- */
.beyond-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (min-width: 760px) { .beyond-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 1080px) { .beyond-grid { grid-template-columns: repeat(4, 1fr); } }
.bcard {
  --c: var(--beam);
  position: relative; text-align: left; cursor: pointer; padding: 20px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card);
  backdrop-filter: blur(12px); overflow: hidden; transition: transform .35s var(--ease), border-color .3s; min-height: 170px; display: flex; flex-direction: column;
}
.bcard::before { content: ''; position: absolute; inset: auto -40% -60% auto; width: 200px; height: 200px; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--c) 40%, transparent), transparent 70%); transition: transform .5s var(--ease); }
.bcard:hover { transform: translateY(-5px); border-color: color-mix(in srgb, var(--c) 60%, transparent); }
.bcard:hover::before { transform: scale(1.5); }
.bcard .b-icon { font-size: 28px; margin-bottom: 14px; line-height: 1; }
.bcard h4 { font-size: 17px; margin-bottom: 6px; position: relative; }
.bcard p { color: var(--muted); font-size: 13.5px; margin: 0; position: relative; }
.bcard .more { margin-top: auto; padding-top: 12px; font-size: 12px; color: var(--c); font-weight: 600; position: relative; }
.fcc { display: flex; gap: 28px; align-items: center; margin-top: 24px; }
@media (max-width: 700px) { .fcc { flex-direction: column; align-items: flex-start; } }
.fcc-art svg { width: 260px; height: auto; }
.fcc-art .fcc-lhc { fill: none; stroke: var(--beam); stroke-width: 2.5; }
.fcc-art .fcc-ring { fill: none; stroke: var(--violet); stroke-width: 3; stroke-dasharray: 8 6; animation: dash 20s linear infinite; }
.fcc-art text { fill: #cbd3ea; font-family: var(--mono); font-size: 13px; }
@keyframes dash { to { stroke-dashoffset: -400; } }

.modal { position: fixed; inset: 0; z-index: 70; background: rgba(2, 3, 10, .75); backdrop-filter: blur(8px); display: grid; place-items: center; padding: 16px; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
.modal.open { opacity: 1; visibility: visible; }
.modal-card { max-width: 620px; width: 100%; max-height: 86vh; overflow: auto; transform: translateY(20px) scale(.97); transition: transform .4s var(--ease); border-color: var(--line-2); background: rgba(12, 17, 36, .96); }
.modal.open .modal-card { transform: none; }
.modal-close, .lb-close, .menu-close { position: absolute; top: 12px; right: 12px; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .05); cursor: pointer; font-size: 22px; line-height: 1; display: grid; place-items: center; }
.modal-close:hover, .lb-close:hover, .menu-close:hover { background: rgba(255, 255, 255, .12); }
.modal .m-icon { font-size: 44px; margin-bottom: 8px; }
.modal h3 { font-size: 28px; padding-right: 40px; }
.modal .m-sub { font-family: var(--mono); font-size: 12px; color: var(--c, var(--beam)); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 14px; }
.modal ul { padding-left: 20px; color: #cdd4ea; }
.modal li { margin-bottom: 6px; }
.modal .m-fact { margin-top: 16px; padding: 14px 16px; border-radius: 12px; background: rgba(76, 201, 240, .08); border: 1px solid rgba(76, 201, 240, .25); font-size: 14.5px; }

/* ---------- STATS ---------- */
.measure-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.measure-head h3 { margin: 0; }
#msSvg { width: 100%; height: auto; touch-action: none; user-select: none; }
#msSvg .axis { stroke: rgba(255, 255, 255, .3); stroke-width: 1.5; }
#msSvg .tick { stroke: rgba(255, 255, 255, .25); }
#msSvg .tick-lbl { fill: var(--dim); font-family: var(--mono); font-size: 12px; text-anchor: middle; }
#msSvg .band { fill: rgba(76, 201, 240, .14); stroke: rgba(76, 201, 240, .5); stroke-dasharray: 4 4; transition: all .15s; }
#msSvg .mean { stroke: var(--gold); stroke-width: 2.5; }
#msSvg .mean-lbl { fill: var(--gold); font-family: var(--mono); font-size: 13px; font-weight: 600; text-anchor: middle; }
#msSvg .sig-lbl { fill: var(--beam); font-family: var(--mono); font-size: 12px; text-anchor: middle; }
#msSvg .pt { cursor: grab; }
#msSvg .pt circle.core { fill: #fff; stroke: var(--violet); stroke-width: 4; filter: drop-shadow(0 0 8px rgba(155, 107, 255, .9)); transition: r .15s; }
#msSvg .pt:hover circle.core, #msSvg .pt.drag circle.core { r: 13; }
#msSvg .pt circle.hit { fill: transparent; }
#msSvg .pt text { fill: #fff; font-family: var(--mono); font-size: 12px; text-anchor: middle; }
#msSvg .stem { stroke: rgba(155, 107, 255, .6); stroke-width: 2; }
.formula-row { display: grid; gap: 10px; grid-template-columns: 1fr; margin-top: 10px; }
@media (min-width: 800px) { .formula-row { grid-template-columns: 1fr 1fr; } }
.formula { font-family: var(--mono); font-size: 13.5px; padding: 12px 14px; border-radius: 12px; background: rgba(255, 255, 255, .04); border: 1px solid var(--line); overflow-x: auto; white-space: nowrap; }
.formula .f-label { color: var(--gold); font-weight: 600; margin-right: 6px; }
.formula .res { color: #fff; font-weight: 600; background: rgba(76, 201, 240, .15); padding: 1px 6px; border-radius: 6px; }
.ms-msg { margin: 14px 0 0; min-height: 1.6em; color: var(--beam); font-weight: 600; }

.tabs { display: inline-flex; padding: 4px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); }
.tabs button { border: 0; background: none; padding: 7px 14px; border-radius: 999px; cursor: pointer; font-size: 13px; font-weight: 600; color: var(--muted); transition: all .2s; }
.tabs button.active { background: var(--beam); color: #04121c; }
.galton-wrap { position: relative; width: 100%; aspect-ratio: 16 / 10; max-height: 520px; border-radius: 16px; background: rgba(0, 0, 0, .25); border: 1px solid var(--line); overflow: hidden; }
.galton-wrap canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
@media (max-width: 600px) { .galton-wrap { aspect-ratio: 4 / 5; } }
.dice-row { position: absolute; top: 14px; left: 50%; transform: translateX(-50%); display: flex; align-items: center; gap: 10px; }
.die { width: 44px; height: 44px; border-radius: 10px; background: #f4f6ff; box-shadow: 0 6px 20px rgba(0, 0, 0, .5), inset 0 -3px 0 #c9cfe6; position: relative; display: grid; grid-template-columns: repeat(3, 1fr); grid-template-rows: repeat(3, 1fr); padding: 6px; }
.die i { width: 7px; height: 7px; border-radius: 50%; background: #0b0f22; place-self: center; }
.die.roll { animation: roll .45s var(--ease); }
@keyframes roll { 0% { transform: rotate(0) scale(1); } 50% { transform: rotate(200deg) scale(.8); } 100% { transform: rotate(360deg) scale(1); } }
.dice-sum { font-family: var(--mono); font-size: 22px; color: #fff; margin-left: 6px; }
.galton-controls { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; margin-top: 14px; }
.readout { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13.5px; color: var(--muted); }
.readout b { color: #fff; font-family: var(--mono); }
.readout.col { flex-direction: column; gap: 6px; margin: 12px 0 18px; }

.sigma-wrap { position: relative; width: 100%; aspect-ratio: 16 / 6; min-height: 200px; }
.sigma-wrap canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.sigma-controls { display: grid; gap: 14px; margin-top: 10px; }
.sigma-controls label { font-family: var(--mono); color: var(--muted); }
.sigma-controls label b { color: #fff; font-size: 20px; }
.sigma-out { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
@media (min-width: 800px) { .sigma-out { grid-template-columns: repeat(4, 1fr); } }
.sigma-out div { background: rgba(255, 255, 255, .04); border: 1px solid var(--line); border-radius: 12px; padding: 10px 14px; }
.sigma-out span { display: block; font-size: 11px; color: var(--dim); text-transform: uppercase; letter-spacing: .07em; }
.sigma-out b { font-family: var(--mono); font-size: 18px; }

/* ---------- HIGGS ---------- */
.higgs-wrap { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 980px) { .higgs-wrap { grid-template-columns: 1.6fr 1fr; } }
.higgs-wrap .card + .card { margin-top: 0; }
.higgs-stage { padding: 0; overflow: hidden; aspect-ratio: 4 / 3.2; }
.higgs-stage canvas { width: 100%; height: 100%; display: block; }
.discovery-banner { position: absolute; left: 50%; top: 18px; transform: translate(-50%, -20px) scale(.9); opacity: 0; pointer-events: none; text-align: center; padding: 14px 22px; border-radius: 16px; background: linear-gradient(120deg, rgba(255, 209, 102, .95), rgba(255, 122, 61, .95)); color: #1b0b02; width: min(92%, 460px); transition: all .6s var(--ease); box-shadow: 0 20px 60px -10px rgba(255, 170, 60, .8); }
.discovery-banner.show { opacity: 1; transform: translate(-50%, 0) scale(1); pointer-events: auto; cursor: pointer; }
.discovery-banner b { display: block; font-family: var(--display); font-size: 26px; font-weight: 800; }
.discovery-banner span { font-size: 13.5px; font-weight: 500; }
.sig-meter { display: flex; align-items: flex-end; gap: 16px; }
.sig-track { position: relative; flex: 1; height: 16px; border-radius: 16px; background: rgba(255, 255, 255, .06); border: 1px solid var(--line); margin: 40px 0 10px; }
.sig-track i { position: absolute; left: 0; top: 0; bottom: 0; width: 0; border-radius: 16px; background: linear-gradient(90deg, #4d7cff, #4cc9f0 45%, var(--gold) 70%, var(--hot)); box-shadow: 0 0 16px rgba(76, 201, 240, .7); transition: width .2s linear; }
.sig-track .mark { position: absolute; bottom: 22px; transform: translateX(-50%); font-family: var(--mono); font-size: 12px; font-weight: 600; text-align: center; line-height: 1.2; white-space: nowrap; }
.sig-track .mark::after { content: ''; position: absolute; left: 50%; top: calc(100% + 2px); height: 20px; border-left: 2px dashed currentColor; }
.sig-track .mark small { display: block; font-weight: 400; font-size: 10.5px; opacity: .8; }
.sig-track .m3 { left: 42.857%; color: var(--beam); }
.sig-track .m5 { left: 71.43%; color: var(--gold); }
.sig-value { font-family: var(--display); font-weight: 800; line-height: 1; }
.sig-value b { font-size: 46px; }
.sig-value span { font-size: 22px; color: var(--beam); margin-left: 2px; }
.odds b { display: block; font-family: var(--display); font-size: 34px; font-weight: 800; margin-bottom: 8px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.odds b small { font-size: .5em; }
.odds p { color: var(--muted); font-size: 14.5px; }

/* ---------- MUONS ---------- */
.muon-wrap { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 980px) { .muon-wrap { grid-template-columns: 1.4fr 1fr; } }
.muon-wrap .card + .card { margin-top: 0; }
.muon-stage { padding: 0; overflow: hidden; height: min(560px, 75vh); }
.muon-stage canvas { width: 100%; height: 100%; display: block; }
.muon-side { display: flex; flex-direction: column; gap: 14px; }
.slider-label { font-size: 14px; color: var(--muted); }
.slider-label b { color: #fff; font-family: var(--mono); }
.meters.two { margin: 0; }
.versus { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.versus div { border-radius: 14px; padding: 14px; border: 1px solid rgba(255, 77, 109, .35); background: rgba(255, 77, 109, .08); text-align: center; }
.versus div.win { border-color: rgba(46, 229, 157, .45); background: rgba(46, 229, 157, .09); }
.versus span { display: block; font-size: 12px; color: var(--muted); }
.versus b { display: block; font-family: var(--display); font-size: 30px; font-weight: 800; }
.versus small { color: var(--dim); font-size: 11.5px; }
.insight { margin-top: 20px; border-color: rgba(76, 201, 240, .35); background: linear-gradient(150deg, rgba(76, 201, 240, .1), rgba(16, 22, 44, .55)); }
.insight p { color: #cdd4ea; }
.twins { display: grid; gap: 20px; grid-template-columns: 1fr; }
@media (min-width: 980px) { .twins { grid-template-columns: 1.4fr 1fr; align-items: center; } }
#twinSvg { width: 100%; height: auto; }
.twins-controls { display: flex; flex-direction: column; gap: 12px; }
.twin-ages { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.twin-ages div { border-radius: 14px; padding: 14px; background: rgba(255, 122, 61, .08); border: 1px solid rgba(255, 122, 61, .35); }
.twin-ages div.win { background: rgba(46, 229, 157, .09); border-color: rgba(46, 229, 157, .45); }
.twin-ages span { display: block; font-size: 12px; color: var(--muted); }
.twin-ages b { font-family: var(--display); font-size: 36px; font-weight: 800; }
.twin-ages small { color: var(--dim); margin-left: 4px; }

/* ---------- GALLERY ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.filters button { padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); cursor: pointer; font-size: 13.5px; font-weight: 600; color: var(--muted); transition: all .2s; }
.filters button:hover { color: #fff; }
.filters button.active { background: #fff; color: #0b0f22; border-color: #fff; }
.filters button span { opacity: .6; margin-left: 6px; font-family: var(--mono); font-size: 12px; }
.gallery { columns: 2 160px; column-gap: 12px; }
@media (min-width: 760px) { .gallery { columns: 3 220px; column-gap: 16px; } }
.shot { break-inside: avoid; margin: 0 0 12px; position: relative; border-radius: 16px; overflow: hidden; cursor: zoom-in; background: #0b1024; border: 1px solid var(--line); transform: translateZ(0); transition: opacity .4s, transform .4s var(--ease); }
@media (min-width: 760px) { .shot { margin-bottom: 16px; } }
.shot img { width: 100%; height: auto; display: block; transition: transform .8s var(--ease), filter .5s; opacity: 0; }
.shot img.loaded { opacity: 1; transition: opacity .6s, transform .8s var(--ease); }
.shot:hover img { transform: scale(1.06); }
.shot figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 30px 14px 12px; background: linear-gradient(transparent, rgba(2, 3, 10, .9)); font-size: 13px; font-weight: 500; transform: translateY(8px); opacity: .0; transition: all .35s var(--ease); }
.shot:hover figcaption { transform: none; opacity: 1; }
@media (hover: none) { .shot figcaption { opacity: 1; transform: none; font-size: 12px; } }
.shot.hide { display: none; }
.shot .tagline { display: block; font-family: var(--mono); font-size: 10.5px; color: var(--beam); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 2px; }

.lightbox { position: fixed; inset: 0; z-index: 80; background: rgba(2, 3, 10, .94); backdrop-filter: blur(10px); display: grid; place-items: center; opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; padding: 16px; }
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox figure { margin: 0; max-width: 100%; max-height: 100%; display: flex; flex-direction: column; align-items: center; }
.lightbox img { max-width: min(1200px, 100%); max-height: calc(100dvh - 140px); border-radius: 14px; box-shadow: 0 30px 80px rgba(0, 0, 0, .7); transition: opacity .25s, transform .35s var(--ease); }
.lightbox img.swap { opacity: 0; transform: scale(.97); }
.lightbox figcaption { margin-top: 14px; color: #cdd4ea; text-align: center; max-width: 700px; font-size: 14.5px; }
.lb-prev, .lb-next { position: absolute; top: 50%; transform: translateY(-50%); width: 50px; height: 50px; border-radius: 50%; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .06); font-size: 30px; cursor: pointer; line-height: 1; }
.lb-prev { left: 16px; } .lb-next { right: 16px; }
.lb-prev:hover, .lb-next:hover { background: rgba(255, 255, 255, .15); }
@media (max-width: 600px) { .lb-prev, .lb-next { top: auto; bottom: 20px; transform: none; } }

/* ---------- LEARNED ---------- */
.cloud-card { padding: 0; overflow: hidden; }
.cloud-stage { position: relative; height: min(460px, 60vh); background: #030409; cursor: crosshair; }
.cloud-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.cloud-overlay { position: absolute; left: 22px; top: 18px; max-width: 420px; pointer-events: none; }
.cloud-text { color: #cdd4ea; font-size: 14.5px; text-shadow: 0 2px 8px #000; }
.cloud-legend { position: absolute; right: 16px; bottom: 14px; display: flex; gap: 14px; font-family: var(--mono); font-size: 13px; color: var(--muted); background: rgba(3, 4, 9, .7); padding: 6px 12px; border-radius: 999px; pointer-events: none; }
.cloud-legend i { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.cloud-legend b { color: #fff; margin-left: 4px; }
.lessons { display: grid; grid-template-columns: 1fr; gap: 14px; margin: 28px 0; }
@media (min-width: 700px) { .lessons { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .lessons { grid-template-columns: repeat(3, 1fr); } }
.lesson { position: relative; padding: 22px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card); backdrop-filter: blur(12px); overflow: hidden; transition: transform .35s var(--ease), border-color .3s; }
.lesson:hover { transform: translateY(-4px); border-color: rgba(155, 107, 255, .5); }
.lesson .num { position: absolute; right: 14px; top: 6px; font-family: var(--display); font-weight: 800; font-size: 56px; color: rgba(255, 255, 255, .05); line-height: 1; }
.lesson h4 { font-size: 18px; }
.lesson p { color: var(--muted); font-size: 14.5px; margin: 0; }
.thanks { text-align: center; padding: clamp(28px, 5vw, 56px); border-color: rgba(155, 107, 255, .4); background: radial-gradient(ellipse at 50% 0%, rgba(155, 107, 255, .22), rgba(16, 22, 44, .6) 70%); }
.thanks h3 { font-size: clamp(26px, 4.4vw, 44px); font-weight: 800; }
.thanks p { color: #cdd4ea; max-width: 680px; margin-left: auto; margin-right: auto; }
.credits { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); margin: 24px 0; }
.credits b { color: #fff; }
.qr { display: inline-flex; flex-direction: column; align-items: center; gap: 8px; margin: 10px 0; font-size: 13px; color: var(--muted); }
.qr #qrCode { background: #fff; padding: 10px; border-radius: 14px; }
.qr #qrCode img, .qr #qrCode svg { display: block; width: 150px; height: 150px; }

/* ---------- pager ---------- */
.pager {
  position: fixed; left: 50%; bottom: calc(14px + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 40;
  display: flex; align-items: center; gap: 10px; padding: 6px; border-radius: 999px;
  background: rgba(8, 12, 28, .72); border: 1px solid var(--line-2); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 16px 40px -12px rgba(0, 0, 0, .8);
}
.pager-btn { width: 42px; height: 42px; border-radius: 50%; border: 0; background: rgba(255, 255, 255, .07); cursor: pointer; font-size: 24px; line-height: 1; transition: background .2s, transform .2s; }
.pager-btn:hover { background: var(--beam); color: #04121c; transform: scale(1.06); }
.pager-btn:disabled { opacity: .25; pointer-events: none; }
.pager-dots { display: flex; gap: 6px; padding: 0 4px; }
.pager-dots button { width: 8px; height: 8px; padding: 0; border-radius: 50%; border: 0; background: rgba(255, 255, 255, .22); cursor: pointer; transition: all .35s var(--ease); }
.pager-dots button.on { width: 26px; border-radius: 8px; background: var(--beam); box-shadow: 0 0 10px var(--beam); }
.pager-dots button:hover { background: rgba(255, 255, 255, .6); }
@media (max-width: 420px) { .pager-dots button { width: 6px; height: 6px; } .pager-dots button.on { width: 18px; } }

/* next chapter card */
.next-card { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 56px; padding: 22px 26px; border-radius: var(--radius); border: 1px solid var(--line); background: linear-gradient(100deg, rgba(76, 201, 240, .1), rgba(155, 107, 255, .1)); text-decoration: none; color: var(--ink); transition: transform .3s var(--ease), border-color .3s; }
.next-card:hover { transform: translateY(-3px); border-color: rgba(76, 201, 240, .6); }
.next-card small { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--beam); }
.next-card strong { font-family: var(--display); font-size: clamp(18px, 2.4vw, 24px); }
.next-card .go { width: 48px; height: 48px; flex: none; border-radius: 50%; display: grid; place-items: center; background: var(--grad); color: #0b0f22; font-size: 22px; font-weight: 800; transition: transform .3s var(--ease); }
.next-card:hover .go { transform: translateX(4px); }

/* ---------- MENU ---------- */
.menu { position: fixed; inset: 0; z-index: 90; background: rgba(2, 3, 10, .92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); opacity: 0; visibility: hidden; transition: opacity .4s, visibility .4s; overflow-y: auto; }
.menu.open { opacity: 1; visibility: visible; }
.menu-inner { min-height: 100%; display: grid; grid-template-columns: 1fr; align-items: center; gap: 12px; max-width: 1100px; margin: 0 auto; padding: calc(60px + env(safe-area-inset-top)) 16px calc(30px + env(safe-area-inset-bottom)); }
@media (min-width: 900px) { .menu-inner { grid-template-columns: 1fr 1fr; gap: 40px; padding: 40px 32px; } }
.menu-ring-wrap { display: grid; place-items: center; }
.menu-ring { width: min(420px, 80vw); height: auto; transform: scale(.85) rotate(-40deg); opacity: 0; transition: transform .8s var(--ease), opacity .6s; }
.menu.open .menu-ring { transform: none; opacity: 1; }
@media (max-width: 899px) { .menu-ring { width: min(240px, 60vw); } }
.menu-ring .r-main { fill: none; stroke: rgba(76, 201, 240, .35); stroke-width: 2; }
.menu-ring .r-beam { fill: none; stroke: var(--beam); stroke-width: 3; stroke-dasharray: 30 600; stroke-linecap: round; filter: drop-shadow(0 0 6px var(--beam)); animation: ringBeam 3s linear infinite; }
.menu-ring .r-beam2 { stroke: var(--hot); filter: drop-shadow(0 0 6px var(--hot)); animation-direction: reverse; animation-duration: 3.4s; }
@keyframes ringBeam { to { stroke-dashoffset: -630; } }
.menu-ring .st { cursor: pointer; }
.menu-ring .st circle { fill: #0b1024; stroke: rgba(255, 255, 255, .4); stroke-width: 2; transition: all .25s; }
.menu-ring .st text { fill: var(--muted); font-family: var(--mono); font-size: 11px; text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.menu-ring .st:hover circle, .menu-ring .st.on circle { fill: var(--beam); stroke: #fff; }
.menu-ring .st:hover text, .menu-ring .st.on text { fill: #04121c; font-weight: 700; }
.menu-ring .center-t { fill: #fff; font-family: var(--display); font-weight: 800; font-size: 26px; text-anchor: middle; }
.menu-ring .center-s { fill: var(--muted); font-family: var(--mono); font-size: 11px; text-anchor: middle; letter-spacing: .15em; }
.menu-list { list-style: none; margin: 0; padding: 0; counter-reset: none; }
.menu-list li { opacity: 0; transform: translateX(20px); transition: opacity .4s, transform .5s var(--ease); transition-delay: calc(var(--i) * 35ms + 100ms); }
.menu.open .menu-list li { opacity: 1; transform: none; }
.menu-list a { display: flex; align-items: baseline; gap: 14px; padding: 9px 12px; border-radius: 12px; color: var(--ink); text-decoration: none; font-family: var(--display); font-weight: 700; font-size: clamp(17px, 2.2vw, 22px); transition: background .2s, color .2s, padding .3s var(--ease); }
.menu-list a span { font-family: var(--mono); font-size: 12px; color: var(--dim); font-weight: 400; width: 22px; }
.menu-list a:hover { background: rgba(255, 255, 255, .06); padding-left: 20px; }
.menu-list a.on { color: var(--beam); }
.menu-list a.on span { color: var(--beam); }
.menu-close { position: fixed; top: calc(14px + env(safe-area-inset-top)); right: 16px; }

/* ---------- toast ---------- */
.toast { position: fixed; left: 50%; bottom: calc(96px + env(safe-area-inset-bottom)); transform: translate(-50%, 20px); z-index: 95; padding: 12px 20px; border-radius: 999px; background: #fff; color: #0b0f22; font-weight: 600; font-size: 14px; opacity: 0; pointer-events: none; transition: all .4s var(--ease); box-shadow: 0 10px 40px rgba(76, 201, 240, .5); max-width: calc(100% - 32px); text-align: center; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- small screens ---------- */
@media (max-width: 640px) {
  :root { --top: 58px; }
  .chapter-title { display: none; }
  .brand span { font-size: 14px; }
  .card { padding: 18px; }
  .section-title { margin-top: 48px; }
  .sm-grid { gap: 5px; }
  .pc { border-radius: 10px; padding: 3px; }
  .props { grid-template-columns: 1fr 1fr; }
  .particle-buttons button { font-size: 12.5px; padding: 10px; }
  .meter b { font-size: 16px; }
}
@media (max-width: 380px) {
  .brand span { display: none; }
}

@media (max-width: 640px) {
  .zoom-steps { flex-wrap: wrap; }
  .zoom-steps button { flex: 1 1 30%; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .rv { opacity: 1; transform: none; }
}

.nocase { text-transform: none; font-style: normal; }

/* =========================================================
   ACCELERATOR COMPLEX — the main exhibit
   ========================================================= */
.cx-head { margin-bottom: 18px; }
.cx-head h2 { margin-bottom: 0; }
.cx-lead { margin-top: 26px; max-width: 820px; }
.cx { --m: #6f8fd6; position: relative; width: min(1560px, calc(100vw - 48px)); margin-left: calc(50% - min(780px, 50vw - 24px)); }
.cx-stage {
  position: relative; height: clamp(520px, calc(100svh - 250px), 920px); border-radius: 16px; overflow: hidden;
  background: #070b14; border: 1px solid rgba(255, 255, 255, .08);
}
.cx-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: pan-y; }

.cx-hud { position: absolute; left: 0; top: 0; padding: 16px 20px 40px; max-width: min(460px, 60%); pointer-events: none;
  background: linear-gradient(160deg, rgba(7, 11, 20, .85), rgba(7, 11, 20, 0) 75%); }
.cx-kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--m); margin: 0 0 4px; transition: color .5s; }
.cx-where { font-family: var(--display); font-size: clamp(20px, 2.2vw, 28px); font-weight: 800; margin: 0 0 4px; letter-spacing: -.01em; }
.cx-what { font-size: 13.5px; color: #b9c3da; margin: 0; line-height: 1.45; }

.cx-read { position: absolute; left: 0; bottom: 0; padding: 36px 20px 16px; display: flex; flex-wrap: wrap; align-items: flex-end; gap: 6px 22px; pointer-events: none;
  background: linear-gradient(20deg, rgba(7, 11, 20, .9), rgba(7, 11, 20, 0) 70%); max-width: 70%; }
.cx-read span { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; color: #7f8aa3; }
.cx-read b { font-family: var(--mono); font-weight: 600; font-size: 15px; color: #e6ecfa; white-space: nowrap; }
.cx-e b { font-family: var(--display); font-weight: 800; font-size: clamp(26px, 3vw, 38px); letter-spacing: -.01em; color: #fff; }
.cx-next b { color: var(--m); }
.cx-read { transition: opacity .4s; }
.cx.display-on .cx-read { opacity: 0; }
.cx-real { flex-basis: 100%; margin: 0; font-size: 11.5px; color: #7f8aa3; font-family: var(--mono); }
.cx-note { position: absolute; right: 16px; top: 12px; margin: 0; font-size: 10.5px; color: #6c7790; font-family: var(--mono); pointer-events: none; }

.cx-card { --c: #6f8fd6; position: absolute; right: 14px; top: 14px; width: min(340px, 30%); max-height: calc(100% - 28px); overflow: auto;
  background: rgba(9, 13, 24, .92); border: 1px solid rgba(255, 255, 255, .1); border-left: 3px solid var(--c); border-radius: 12px; padding: 18px 18px 16px;
  transform: translateX(calc(100% + 30px)); opacity: 0; transition: transform .5s var(--ease), opacity .4s; }
.cx-card.show { transform: none; opacity: 1; }
.cx-card-x { position: absolute; right: 8px; top: 6px; width: 30px; height: 30px; border: 0; background: none; color: #8f9ab3; font-size: 20px; cursor: pointer; }
.cx-card-k { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--c); margin: 0 0 4px; }
.cx-card h4 { font-size: 22px; margin: 0 0 8px; }
.cx-card p { font-size: 13.5px; color: #c3cce0; margin: 0 0 10px; line-height: 1.5; }
.cx-card-how { color: #97a2ba !important; font-size: 13px !important; }
.cx-card-facts { display: flex; flex-wrap: wrap; gap: 6px; }
.cx-card-facts span { font-size: 11.5px; color: #97a2ba; padding: 4px 8px; border: 1px solid rgba(255, 255, 255, .1); border-radius: 6px; }
.cx-card-facts b { color: #e6ecfa; font-family: var(--mono); font-weight: 600; }
.cx-card .btn { margin-top: 4px; }

.cx-start { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; text-align: center; padding: 16px;
  background: radial-gradient(ellipse at center, rgba(7, 11, 20, .35), rgba(7, 11, 20, .8)); transition: opacity .5s, visibility .5s; }
.cx-start.hide { opacity: 0; visibility: hidden; }
.cx-go { display: inline-flex; align-items: center; gap: 12px; height: 56px; padding: 0 28px; border-radius: 999px; border: 0; cursor: pointer;
  background: #eef3ff; color: #0b1222; font-family: var(--display); font-weight: 800; font-size: 16px; letter-spacing: .06em; text-transform: uppercase;
  box-shadow: 0 10px 40px -10px rgba(79, 141, 255, .7); transition: transform .2s, box-shadow .2s; }
.cx-go:hover { transform: translateY(-2px); box-shadow: 0 16px 50px -12px rgba(79, 141, 255, .9); }
.cx-go-tri { width: 0; height: 0; border-left: 12px solid #2d6bff; border-top: 8px solid transparent; border-bottom: 8px solid transparent; }
.cx-start p { margin: 0; color: #aab4cb; font-family: var(--mono); font-size: 12px; letter-spacing: .04em; }

.cx-bar { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.cx-play, .cx-restart { flex: none; width: 42px; height: 42px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .16); background: rgba(255, 255, 255, .05); cursor: pointer; font-size: 15px; }
.cx-play { background: #eef3ff; color: #0b1222; border-color: transparent; font-weight: 800; }
.cx-restart:hover { background: rgba(255, 255, 255, .12); }
.cx-nav { flex: 1; display: flex; align-items: center; overflow-x: auto; scrollbar-width: none; gap: 2px; }
.cx-nav::-webkit-scrollbar { display: none; }
.cx-nav button { flex: none; display: inline-flex; align-items: center; gap: 2px; border: 0; background: none; cursor: pointer; padding: 8px 4px; color: #8f9ab3; font-weight: 600; font-size: 14px; }
.cx-nav button i { font-style: normal; color: #4b556b; margin-right: 6px; }
.cx-nav button span { padding: 6px 12px; border-radius: 999px; border: 1px solid transparent; transition: all .25s; }
.cx-nav button:hover span { color: #e6ecfa; border-color: rgba(255, 255, 255, .14); }
.cx-nav button.on span { color: #0b1222; background: var(--m); border-color: transparent; }
.cx-exps { display: none; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.cx.exps-open .cx-exps { display: flex; }
.cx-exps button { --c: #c9b3ff; border: 1px solid color-mix(in srgb, var(--c) 45%, transparent); background: rgba(255, 255, 255, .03); color: #d5dcec; border-radius: 8px; padding: 6px 11px; cursor: pointer; font-size: 13px; font-weight: 600; }
.cx-exps button.major { font-weight: 800; }
.cx-exps button.minor { font-size: 12px; color: #aab4cb; }
.cx-exps button:hover, .cx-exps button.on { background: color-mix(in srgb, var(--c) 22%, transparent); color: #fff; }

@media (max-width: 700px) {
  .cx { width: 100vw; margin-left: calc(50% - 50vw); }
  .cx-stage { height: 76svh; min-height: 460px; border-radius: 0; border-left: 0; border-right: 0; }
  .cx-hud { padding: 12px 14px 30px; max-width: 78%; }
  .cx-where { font-size: 19px; }
  .cx-what { font-size: 12.5px; }
  .cx-read { padding: 30px 14px 12px; gap: 4px 16px; max-width: 100%; right: 90px; }
  .cx-e b { font-size: 26px; }
  .cx-read b { font-size: 13px; }
  .cx-real { font-size: 10.5px; }
  .cx-note { display: none; }
  .cx-card { left: 0; right: 0; top: auto; bottom: 0; width: auto; max-height: 48%; border-radius: 14px 14px 0 0; border-left: 1px solid rgba(255, 255, 255, .1); border-top: 3px solid var(--c); transform: translateY(105%); }
  .cx-card h4 { font-size: 19px; }
  .cx-bar, .cx-exps { padding: 0 12px; }
  .cx-nav button { font-size: 13px; padding: 6px 2px; }
  .cx-nav button span { padding: 5px 9px; }
}

/* =========================================================
   RIDE ALONG — first-person view
   ========================================================= */
.jr { --stage: var(--beam); margin-bottom: 20px; }
.jr-stage {
  position: relative; width: 100%; aspect-ratio: 16 / 9; max-height: 78vh; border-radius: 10px;
  overflow: hidden; background: #02030a; border: 1px solid var(--line-2);
}
@media (max-width: 700px) { .jr-stage { aspect-ratio: 4 / 5; max-height: 72vh; } }
.jr-stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.jr-vignette { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, .55) 100%); }
.jr-flash { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(circle, #fff, rgba(180, 220, 255, .6) 40%, transparent 75%); opacity: 0; }
.jr-flash.go { animation: jrFlash .55s ease-out; }
.jr-flash.go.big { animation: jrFlashBig 1.1s ease-out; }
@keyframes jrFlash { 0% { opacity: .75; } 100% { opacity: 0; } }
@keyframes jrFlashBig { 0% { opacity: 1; background: #fff; } 25% { opacity: .9; } 100% { opacity: 0; } }

.jr-hud { position: absolute; left: 18px; top: 14px; max-width: min(58%, 520px); pointer-events: none; text-shadow: 0 2px 10px rgba(0, 0, 0, .8); }
.jr-step { font-family: var(--mono); font-size: 11.5px; letter-spacing: .14em; color: var(--stage); margin: 0 0 2px; transition: color .6s; }
.jr-name { font-size: clamp(20px, 2.8vw, 32px); font-weight: 800; margin: 0 0 4px; }
.jr-what { font-size: clamp(12.5px, 1.3vw, 15px); color: #cdd6f0; margin: 0; }

.jr-meters { position: absolute; left: 14px; right: 60px; bottom: 14px; display: flex; flex-wrap: wrap; gap: 8px; align-items: stretch; pointer-events: none; transition: opacity .4s; }
.jr-meters > div { background: rgba(4, 7, 18, .7); border: 1px solid rgba(255, 255, 255, .1); border-radius: 6px; padding: 7px 12px; }
.jr-meters span { display: block; font-size: 10px; color: var(--dim); text-transform: uppercase; letter-spacing: .09em; white-space: nowrap; }
.jr-meters b { font-family: var(--mono); font-size: clamp(13px, 1.4vw, 16px); font-weight: 600; white-space: nowrap; }
.jr-meters .jr-energy { border-color: color-mix(in srgb, var(--stage) 60%, transparent); }
.jr-meters .jr-energy b { font-family: var(--display); font-weight: 800; font-size: clamp(20px, 2.6vw, 30px); color: #fff; }
.jr-fieldbox { display: flex; flex-direction: column; align-items: center; }
.jr-fieldbox i { display: block; width: 26px; height: 26px; margin-top: 3px; border-radius: 50%; background: radial-gradient(circle, #fff 0 12%, rgba(76, 201, 240, .9) 13%, rgba(76, 201, 240, .15) 70%, transparent 72%); transition: transform .3s; }
@media (max-width: 700px) {
  .jr-meters { right: 12px; gap: 6px; }
  .jr-meters > div { padding: 5px 9px; }
  .jr-fieldbox, .jr-part { display: none !important; }
  .jr-hud { max-width: calc(66% - 30px); }
  .jr-name { font-size: 19px; }
}

.jr-map { position: absolute; right: 12px; top: 12px; width: clamp(130px, 24%, 280px); height: auto; background: rgba(4, 7, 18, .7); border: 1px solid rgba(255, 255, 255, .1); border-radius: 8px; padding: 4px; }
.jr-map .m-el { cursor: pointer; }
.jr-map .m-shape { fill: none; stroke-width: 2.4; opacity: .45; transition: opacity .3s, stroke-width .3s; }
.jr-map rect.m-shape { fill: rgba(46, 229, 157, .15); }
.jr-map .m-hit { fill: none; stroke: transparent; stroke-width: 12; }
.jr-map .m-el:hover .m-shape, .jr-map .m-el.on .m-shape { opacity: 1; stroke-width: 3.4; }
.jr-map .m-ip { fill: var(--gold); opacity: .6; }
.jr-map .m-el.on .m-ip { opacity: 1; }
.jr-map .m-lbl { font-family: var(--mono); font-size: 9.5px; fill: #9aa4c2; pointer-events: none; }
.jr-map .m-marker { fill: #fff; }
.jr-map .m-trail { fill: none; stroke: #fff; stroke-width: 2; stroke-linecap: round; opacity: .55; }
@media (max-width: 700px) { .jr-map { width: 32%; } .jr-map .m-lbl { display: none; } }

.jr-title { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); text-align: center; pointer-events: none; opacity: 0; width: 90%; }
.jr-title small { display: block; font-family: var(--mono); font-size: 12px; letter-spacing: .2em; color: var(--stage); }
.jr-title b { display: block; font-family: var(--display); font-weight: 800; font-size: clamp(30px, 6vw, 72px); line-height: 1.05; }
.jr-title em { display: block; font-style: normal; font-family: var(--mono); font-size: clamp(14px, 1.8vw, 20px); color: #fff; margin-top: 6px; }
.jr-title.show { animation: jrTitle 1.9s cubic-bezier(.2, .8, .2, 1) both; }
@keyframes jrTitle {
  0% { opacity: 0; transform: translate(-50%, -50%) scale(1.35); filter: blur(10px); letter-spacing: .1em; }
  18% { opacity: 1; transform: translate(-50%, -50%) scale(1); filter: blur(0); letter-spacing: 0; }
  70% { opacity: 1; }
  100% { opacity: 0; transform: translate(-50%, -50%) scale(.92); filter: blur(4px); }
}
.jr-slowmo { position: absolute; left: 50%; top: 16px; transform: translateX(-50%); padding: 4px 12px; border-radius: 4px; font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; color: var(--gold); border: 1px solid rgba(255, 209, 102, .4); background: rgba(4, 7, 18, .6); opacity: 0; transition: opacity .4s; pointer-events: none; }
.jr-slowmo.show { opacity: 1; }
@media (max-width: 700px) { .jr-slowmo { top: auto; bottom: 86px; } }

.jr-start { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; text-align: center; background: radial-gradient(ellipse at center, rgba(2, 3, 10, .2), rgba(2, 3, 10, .75)); transition: opacity .5s, visibility .5s; padding: 16px; }
.jr-start .btn { --h: 58px; font-size: 17px; padding: 0 30px; }
.jr-start p { color: #cdd6f0; margin: 0; font-size: 13px; font-family: var(--mono); }
.jr-start.hide { opacity: 0; visibility: hidden; }

.jr-end { position: absolute; left: 50%; bottom: 18px; transform: translate(-50%, 20px); width: min(92%, 520px); text-align: center; padding: 18px 20px; border-radius: 8px; background: rgba(6, 9, 22, .9); border: 1px solid rgba(255, 209, 102, .4); opacity: 0; visibility: hidden; transition: all .6s var(--ease); }
.jr-end.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.jr-end .eyebrow { margin-bottom: 2px; color: var(--gold); }
.jr-end > b { display: block; font-family: var(--display); font-size: clamp(30px, 5vw, 46px); font-weight: 800; color: var(--gold); line-height: 1.1; }
.jr-end p { color: #cdd6f0; font-size: 14px; margin: 6px 0 14px; }
.jr-end .btn-row { justify-content: center; }
.jr-next-ch { position: relative; overflow: hidden; }
.jr-count { position: absolute; left: 0; bottom: 0; height: 3px; width: 0; background: rgba(255, 255, 255, .85); }
.jr.counting .jr-count { animation: jrCount 7s linear forwards; }
@keyframes jrCount { to { width: 100%; } }
.jr-stage:has(.jr-end.show) .jr-meters { opacity: 0; }

.jr-fs { position: absolute; right: 12px; bottom: 12px; width: 38px; height: 38px; border-radius: 6px; border: 1px solid rgba(255, 255, 255, .15); background: rgba(4, 7, 18, .6); cursor: pointer; font-size: 18px; line-height: 1; }
.jr-fs:hover { background: rgba(255, 255, 255, .12); }
@media (max-width: 700px) { .jr-fs { display: none; } }

.jr-steps { list-style: none; margin: 14px 0 0; padding: 0; display: grid; grid-template-columns: repeat(7, minmax(92px, 1fr)); gap: 6px; overflow-x: auto; scrollbar-width: none; }
.jr-steps::-webkit-scrollbar { display: none; }
.jr-steps li { --c: var(--beam); }
.jr-steps button { position: relative; width: 100%; display: flex; flex-direction: column; align-items: flex-start; gap: 1px; padding: 9px 10px 11px; border-radius: 6px; border: 1px solid var(--line); background: rgba(255, 255, 255, .03); cursor: pointer; text-align: left; overflow: hidden; transition: border-color .3s, background .3s; }
.jr-steps button:hover { border-color: var(--line-2); }
.jr-steps .n { font-family: var(--mono); font-size: 10px; color: var(--dim); }
.jr-steps b { font-size: 13.5px; font-weight: 700; white-space: nowrap; }
.jr-steps small { font-family: var(--mono); font-size: 11px; color: var(--muted); white-space: nowrap; }
.jr-steps i { position: absolute; left: 0; bottom: 0; height: 3px; width: 0; background: var(--c); }
.jr-steps li.done i { width: 100% !important; opacity: .45; }
.jr-steps li.on button { border-color: var(--c); background: color-mix(in srgb, var(--c) 14%, transparent); }
.jr-steps li.on .n, .jr-steps li.done .n { color: var(--c); }

.jr-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.jr-btn { width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-2); background: rgba(255, 255, 255, .06); cursor: pointer; font-size: 16px; transition: background .2s; }
.jr-btn:hover { background: rgba(255, 255, 255, .14); }
#jrPlay { background: var(--beam); color: #04121c; border-color: transparent; font-weight: 800; }
.jr-nextbtn { --h: 44px; }
.jr-auto { display: inline-flex; align-items: center; gap: 8px; margin-left: auto; font-size: 13.5px; color: var(--muted); cursor: pointer; user-select: none; }
.jr-auto input { position: absolute; opacity: 0; pointer-events: none; }
.jr-auto span { width: 38px; height: 22px; border-radius: 999px; background: rgba(255, 255, 255, .12); position: relative; transition: background .25s; }
.jr-auto span::after { content: ''; position: absolute; left: 3px; top: 3px; width: 16px; height: 16px; border-radius: 50%; background: #fff; transition: transform .25s var(--ease); }
.jr-auto input:checked + span { background: var(--beam); }
.jr-auto input:checked + span::after { transform: translateX(16px); }

.jr-info { margin-top: 14px; --c: var(--beam); border-color: color-mix(in srgb, var(--c) 35%, var(--line)); }
.jr-info-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.jr-info-head h4 { margin: 0; font-size: 18px; }
.jr-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--c); }
.jr-info ul { margin: 0 0 12px; padding-left: 20px; color: #cdd6f0; font-size: 14.5px; }
.jr-info li { margin-bottom: 4px; }
.jr-facts { display: flex; flex-wrap: wrap; gap: 8px; }
.jr-facts div { background: rgba(255, 255, 255, .04); border: 1px solid var(--line); border-radius: 6px; padding: 6px 12px; }
.jr-facts span { display: block; font-size: 10.5px; color: var(--dim); text-transform: uppercase; letter-spacing: .08em; }
.jr-facts b { font-family: var(--mono); font-size: 13.5px; }
.jr:fullscreen { background: #02030a; padding: 16px; display: flex; flex-direction: column; overflow: auto; }
.jr:fullscreen .jr-stage { flex: 1; aspect-ratio: auto; max-height: none; min-height: 0; }
.jr:fullscreen .jr-info { display: none; }

/* =========================================================
   Toning down: fewer glows, flatter surfaces, real typography.
   (Everything above still works; these rules only override.)
   ========================================================= */
:root { --radius: 10px; --radius-sm: 6px; --serif: 'Literata', Georgia, serif; }

/* headings: a serif instead of the usual rounded sans */
.ch-head h2, .hero-title, .section-title, .card h3, .thanks h3, .jr-name, .jr-title b, .cx-where, .modal h3 {
  font-family: var(--serif); font-weight: 500; letter-spacing: -.015em;
}
.ch-head h2 { font-size: clamp(34px, 5.4vw, 58px); }
.hero-title { font-weight: 500; letter-spacing: -.03em; }
.hero-title t-en, .hero-title t-el { font-family: var(--serif); font-weight: 400; font-style: italic; }

/* no animated gradient text: one accent colour */
.grad-text { background: none; -webkit-background-clip: initial; background-clip: initial; color: var(--beam); animation: none; }
.hero-title .grad-text { color: #fff; filter: none; }
.odds b { background: none; -webkit-background-clip: initial; background-clip: initial; color: #fff; font-family: var(--serif); font-weight: 500; }

/* flatter surfaces, less glass */
.card, .stat, .fact, .bcard, .lesson { backdrop-filter: none; -webkit-backdrop-filter: none; background: rgba(12, 16, 32, .78); box-shadow: none; }
.stat.hl { background: rgba(12, 16, 32, .78); border-color: rgba(76, 201, 240, .45); }
.fam.good { background: rgba(12, 16, 32, .78); box-shadow: none; }
.exp.visited { background: rgba(12, 16, 32, .78); }
.bcard::before { display: none; }
.bcard .b-icon { font-family: var(--mono); font-size: 12px; color: var(--c); letter-spacing: .1em; margin-bottom: 18px; }
.modal .m-icon { font-family: var(--mono); font-size: 13px; color: var(--c, var(--beam)); letter-spacing: .1em; }
.q { background: rgba(12, 16, 32, .6); }
.q span { background: none; border: 1px solid var(--beam); color: var(--beam); }
.lesson .num { color: rgba(255, 255, 255, .08); font-family: var(--mono); font-weight: 400; font-size: 44px; }
.thanks { background: rgba(12, 16, 32, .78); }
.ticker { backdrop-filter: none; }

/* buttons: solid, not gradient pills */
.btn { border-radius: 6px; }
.btn-primary { background: #e9edf8; color: #0a0e1c; box-shadow: none; }
.btn-primary:hover { background: #fff; box-shadow: none; }
.btn:hover { transform: none; }
.next-card .go { background: none; border: 1px solid var(--beam); color: var(--beam); }
.lang-btn, .menu-btn, .chip-btn, .tabs, .filters button, .sm-legend button { border-radius: 6px; }
.lang-btn span, .tabs button { border-radius: 4px; }
.pager { border-radius: 10px; }
.pager-btn { border-radius: 6px; }
.pager-dots button.on { box-shadow: none; }
.cx-go, .cx-play { border-radius: 6px; }

/* fewer glows */
.intro-status, .zoom-size { text-shadow: none; }
.progress i { box-shadow: none; }
.progress i::after { box-shadow: none; }
.cern-tag, .badge { box-shadow: none; border-radius: 4px; }
.discovery-banner { box-shadow: none; border-radius: 8px; background: #ffd166; }
.pc:hover { box-shadow: none; transform: translateY(-2px); }
.pc.sel { box-shadow: 0 0 0 2px var(--c); }
.sm-detail .d-sym { box-shadow: none; border-radius: 10px; }
.exp-dot, .particle-buttons i, .massbar-track i { box-shadow: none; }
.cern-map .lhc { filter: none; }
.cern-map .beam-dot, .fcc-art .beam-dot { filter: none; }
.brand svg .orbit-dot { filter: none; }
.intro-logo svg { filter: none; }
.sig-track i { box-shadow: none; }
.speedbar i { box-shadow: none; }
.toast { box-shadow: none; border-radius: 6px; }
.shot, .lightbox img, .galton-wrap, .formula, .meter, .sigma-out div, .props div, .versus div, .twin-ages div, .zoom-steps button, .particle-buttons button { border-radius: 6px; }

/* landing numbers: three items */
.ticker { max-width: 680px; }
.ticker > div:last-child { grid-column: 1 / -1; }
@media (min-width: 720px) { .ticker { grid-template-columns: repeat(3, 1fr); } .ticker > div:last-child { grid-column: auto; } }