/* =========================================================
   ExamOnline — Landing page
   Concept: "exam hall at night" — ink-dark stage, cream exam
   paper sections, OMR bubbles & highlighter accents.
   ========================================================= */

:root {
  --ink: #110f26;
  --ink-2: #1a1738;
  --ink-3: #262150;
  --line: rgba(236, 233, 255, .1);
  --txt: #ece9ff;
  --txt-2: #a9a4cf;
  --txt-3: #726d9a;

  --paper: #f6f0e4;
  --paper-2: #efe6d4;
  --paper-ink: #1f1b38;
  --paper-ink-2: #5a5478;
  --rule: rgba(68, 184, 245, .22);
  --margin: rgba(244, 96, 122, .45);

  --violet: #7d71ff;
  --violet-d: #6e62f0;
  --coral: #f4607a;
  --teal: #2ec4a0;
  --amber: #f5a623;
  --sky: #44b8f5;

  --f-display: 'Noto Serif Thai', 'Fraunces', Georgia, serif;
  --f-body: 'IBM Plex Sans Thai', system-ui, sans-serif;
  --f-mono: 'IBM Plex Mono', ui-monospace, monospace;
  --f-num: 'Fraunces', Georgia, serif;

  --r: 18px;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --gutter: clamp(16px, 4vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--txt);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--f-display); margin: 0; line-height: 1.25; font-weight: 800; letter-spacing: -.01em; }
p { margin: 0; }
code { font-family: var(--f-mono); font-size: .86em; background: rgba(125,113,255,.16); padding: .1em .4em; border-radius: 6px; color: #c9c3ff; }
.mono { font-family: var(--f-mono); }
::selection { background: var(--amber); color: var(--ink); }

/* parallax driver — uses the independent `translate` property so it composes with transforms */
[data-speed] { translate: 0 var(--py, 0px); will-change: translate; }

.wrap { width: min(1180px, 100% - var(--gutter) * 2); margin-inline: auto; position: relative; z-index: 2; }

/* grain overlay */
.grain {
  position: fixed; inset: -50%; z-index: 100; pointer-events: none; opacity: .06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain { 0%{transform:translate(0,0)} 20%{transform:translate(-3%,2%)} 40%{transform:translate(2%,-4%)} 60%{transform:translate(-4%,-1%)} 80%{transform:translate(3%,3%)} 100%{transform:translate(0,0)} }

.progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 60; }
.progress span { display: block; height: 100%; width: 100%; transform-origin: 0 50%; transform: scaleX(0); background: linear-gradient(90deg, var(--violet), var(--coral), var(--amber)); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5em; justify-content: center;
  font: 600 15px/1 var(--f-body); padding: 12px 20px; border-radius: 999px;
  border: 1.5px solid transparent; transition: transform .3s var(--ease), background .3s, box-shadow .3s, border-color .3s;
  white-space: nowrap; cursor: pointer;
}
.btn-lg { padding: 16px 28px; font-size: 16px; }
.btn-solid { background: var(--amber); color: var(--ink); box-shadow: 0 8px 30px -8px rgba(245,166,35,.7); }
.btn-solid:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -10px rgba(245,166,35,.9); }
.btn-solid .arr { transition: transform .3s var(--ease); }
.btn-solid:hover .arr { transform: translateX(4px); }
.btn-line { border-color: rgba(236,233,255,.3); color: var(--txt); background: rgba(255,255,255,.02); }
.btn-line:hover { border-color: var(--txt); background: rgba(255,255,255,.06); }
.btn-ghost { color: var(--txt-2); }
.btn-ghost:hover { color: var(--txt); }

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 14px; left: 50%; transform: translateX(-50%);
  width: min(1180px, 100% - 24px); z-index: 50;
  display: flex; align-items: center; gap: 24px; padding: 10px 12px 10px 18px;
  border-radius: 999px; border: 1px solid transparent;
  transition: background .4s, border-color .4s, backdrop-filter .4s, top .4s;
}
.nav.scrolled { background: rgba(17,15,38,.72); border-color: var(--line); backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4); }
.brand {
  display: flex; align-items: center; padding: 7px 16px; border-radius: 999px;
  background: #fffdf7; box-shadow: 0 6px 20px -8px rgba(0,0,0,.6), inset 0 0 0 1px rgba(31,27,56,.06);
  transition: transform .3s var(--ease), box-shadow .3s;
}
.brand:hover { transform: translateY(-1px) rotate(-1deg); box-shadow: 0 10px 26px -8px rgba(46,196,160,.55); }
.brand-logo { height: 30px; width: auto; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a { font-size: 14.5px; color: var(--txt-2); padding: 8px 12px; border-radius: 999px; transition: color .2s, background .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--txt); background: rgba(255,255,255,.07); }
.nav-cta { display: flex; gap: 6px; }
.burger { display: none; margin-left: auto; width: 42px; height: 42px; border-radius: 50%; border: 1px solid var(--line); background: rgba(255,255,255,.04); cursor: pointer; flex-direction: column; justify-content: center; align-items: center; gap: 6px; }
.burger span { width: 18px; height: 2px; background: var(--txt); border-radius: 2px; transition: transform .3s var(--ease); }
.burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(34px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
.d1 { transition-delay: .1s; } .d2 { transition-delay: .2s; } .d3 { transition-delay: .3s; } .d4 { transition-delay: .4s; }

/* ---------- shared headings ---------- */
.eyebrow { font: 500 13px/1 var(--f-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--amber); margin-bottom: 18px; display: inline-flex; align-items: center; gap: 10px; }
.eyebrow::before { content: ''; width: 26px; height: 1.5px; background: currentColor; }
.eyebrow.coral { color: var(--coral); } .eyebrow.sky { color: var(--sky); } .eyebrow.ink { color: var(--violet-d); }
h2 { font-size: clamp(32px, 5vw, 58px); }
.body { color: var(--txt-2); font-size: 17.5px; margin-top: 22px; max-width: 60ch; }
.body b { color: var(--txt); font-weight: 600; }
.center-head { text-align: center; max-width: 820px; margin: 0 auto 64px; }
.center-head .body { margin-inline: auto; }
.center-head .eyebrow::after { content: ''; width: 26px; height: 1.5px; background: currentColor; }

.hl { position: relative; white-space: nowrap; color: var(--ink); z-index: 0; }
.hl::before {
  content: ''; position: absolute; z-index: -1; left: -.12em; right: -.12em; top: .18em; bottom: .02em;
  background: var(--amber); border-radius: .12em .4em .18em .3em; transform: skew(-4deg) scaleX(0); transform-origin: 0 50%;
  animation: marker 1s .9s var(--ease) forwards;
}
@keyframes marker { to { transform: skew(-4deg) scaleX(1); } }
.hl-teal { color: var(--teal); font-style: italic; }
.marker { background: linear-gradient(transparent 55%, rgba(245,166,35,.55) 55%, rgba(245,166,35,.55) 92%, transparent 92%); padding: 0 .08em; }

/* =========================================================
   HERO
   ========================================================= */
.hero { position: relative; min-height: 100svh; padding: 130px 0 90px; overflow: hidden; isolation: isolate; display: flex; flex-direction: column; justify-content: center; }
.hero-layer { position: absolute; inset: -10% 0; pointer-events: none; z-index: -1; }
.layer-grid {
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 75%);
  opacity: .6;
}
.orb { position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; }
.orb-a { width: 520px; height: 520px; background: var(--violet-d); top: 0; right: -120px; }
.orb-b { width: 380px; height: 380px; background: var(--coral); bottom: 10%; left: -140px; opacity: .3; }
.orb-c { width: 280px; height: 280px; background: var(--teal); top: 45%; right: 30%; opacity: .22; }
.layer-word {
  display: flex; align-items: flex-end; justify-content: center; inset: auto 0 -6% 0;
  font: italic 900 clamp(160px, 30vw, 440px)/.8 var(--f-num); letter-spacing: -.06em;
  color: transparent; -webkit-text-stroke: 1.5px rgba(236,233,255,.07);
}

.hero-inner { width: min(1180px, 100% - var(--gutter) * 2); margin-inline: auto; display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; }
.kicker { font: 500 13.5px/1 var(--f-mono); color: var(--txt-2); display: inline-flex; align-items: center; gap: 10px; padding: 9px 16px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.03); margin-bottom: 28px; }
.kicker .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 0 var(--teal); animation: ping 2s infinite; }
@keyframes ping { 0%{box-shadow:0 0 0 0 rgba(46,196,160,.6)} 80%,100%{box-shadow:0 0 0 10px rgba(46,196,160,0)} }
.hero h1 { font-size: clamp(42px, 6.6vw, 88px); line-height: 1.18; font-weight: 900; }
.lead { color: var(--txt-2); font-size: clamp(16.5px, 1.4vw, 19px); margin-top: 28px; max-width: 34em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.hero-meta { list-style: none; padding: 0; margin: 44px 0 0; display: flex; gap: 32px; flex-wrap: wrap; }
.hero-meta li { color: var(--txt-3); font-size: 14px; }
.hero-meta b { display: block; font: 900 30px/1.1 var(--f-num); color: var(--txt); }

/* hero stage */
.hero-stage { position: relative; height: 560px; perspective: 1200px; }
.float { position: absolute; translate: var(--mx, 0px) var(--my, 0px); transition: translate .6s var(--ease); }
.float > * { }
.paper {
  width: 360px; top: 70px; left: 50%; margin-left: -180px;
  background: var(--paper); color: var(--paper-ink); border-radius: 14px; padding: 22px 24px 18px;
  box-shadow: 0 40px 80px -20px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.4) inset;
  background-image: repeating-linear-gradient(transparent 0 31px, var(--rule) 31px 32px);
  background-position: 0 14px;
  transform: rotate(-4deg); animation: bob 7s ease-in-out infinite;
}
.paper::before { content: ''; position: absolute; left: 44px; top: 0; bottom: 0; width: 1.5px; background: var(--margin); }
.paper-logo { display: block; height: 22px; width: auto; margin: 0 0 10px 28px; }
.paper-head { display: flex; justify-content: space-between; font-size: 12px; color: var(--paper-ink-2); margin-bottom: 12px; padding-left: 28px; }
.pts { background: var(--violet-d); color: #fff; padding: 2px 10px; border-radius: 99px; font-size: 11.5px; }
.q { font-weight: 600; font-size: 16px; line-height: 1.6; padding-left: 28px; }
.math { font-family: var(--f-num); font-style: italic; font-weight: 600; white-space: nowrap; }
.choices { list-style: none; padding: 0 0 0 28px; margin: 14px 0; display: grid; gap: 6px; }
.choices li { display: flex; align-items: center; gap: 12px; font-size: 15px; padding: 6px 10px; border-radius: 10px; transition: background .3s; }
.choices i { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--paper-ink-2); flex: none; position: relative; }
.choices li.picked { background: rgba(110,98,240,.12); font-weight: 600; }
.choices li.picked i { border-color: var(--violet-d); }
.choices li.picked i::after { content: ''; position: absolute; inset: 2px; border-radius: 50%; background: var(--violet-d); animation: fill .5s 1.4s both var(--ease); }
@keyframes fill { from { transform: scale(0); } to { transform: scale(1); } }
.paper-foot { display: flex; justify-content: space-between; font-size: 12px; padding: 10px 0 0 28px; border-top: 1px dashed rgba(31,27,56,.2); color: var(--paper-ink-2); }
.saved { color: #1a9a7c; }

.chip {
  background: rgba(30,27,62,.78); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(236,233,255,.14); border-radius: 16px; padding: 12px 16px;
  box-shadow: 0 24px 50px -20px rgba(0,0,0,.7); animation: bob 6s ease-in-out infinite;
}
.chip small { display: block; font-size: 11.5px; color: var(--txt-3); line-height: 1.3; }
.chip b { font-size: 20px; }
.timer { top: 20px; right: 0; display: flex; align-items: center; gap: 12px; animation-delay: -2s; }
.timer svg { width: 44px; height: 44px; transform: rotate(-90deg); }
.t-bg { fill: none; stroke: rgba(255,255,255,.1); stroke-width: 4; }
.t-fg { fill: none; stroke: var(--amber); stroke-width: 4; stroke-linecap: round; stroke-dasharray: 113.1; stroke-dashoffset: 0; transition: stroke-dashoffset 1s linear; }
.code { top: 0; left: 4%; animation-delay: -4s; }
.code b { font-size: 24px; letter-spacing: .18em; color: var(--sky); }
.alert { bottom: 70px; left: -2%; display: flex; gap: 12px; align-items: center; border-color: rgba(244,96,122,.4); animation-delay: -1s; }
.alert b { font-size: 14px; display: block; color: #ffc2cd; }
.alert-ico { width: 32px; height: 32px; border-radius: 10px; background: var(--coral); color: #fff; display: grid; place-items: center; font-weight: 800; animation: blink 1.6s infinite; }
@keyframes blink { 50% { box-shadow: 0 0 0 8px rgba(244,96,122,.0), 0 0 22px rgba(244,96,122,.8); } }
.score { bottom: 20px; right: 2%; text-align: left; animation-delay: -3s; padding: 16px 20px; }
.score b { font: 900 44px/1 var(--f-num); display: block; margin: 4px 0; }
.score em { font-style: normal; font-size: 20px; color: var(--txt-3); }
.pass { font-size: 12px; font-weight: 600; color: var(--ink); background: var(--teal); padding: 3px 10px; border-radius: 99px; }
.omr { top: 330px; right: 22%; opacity: .9; z-index: -1; }
.paper { z-index: 1; }
.omr-grid { display: grid; grid-template-columns: repeat(4, 14px); gap: 7px; padding: 14px; border-radius: 12px; border: 1px dashed rgba(236,233,255,.2); transform: rotate(8deg); }
.omr-grid i { width: 14px; height: 14px; border-radius: 50%; border: 1.5px solid rgba(236,233,255,.3); transition: background .3s, border-color .3s; }
.omr-grid i.on { background: var(--violet); border-color: var(--violet); }
@keyframes bob { 0%,100% { margin-top: 0; } 50% { margin-top: -12px; } }

.scroll-cue { position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); font: 12px var(--f-mono); color: var(--txt-3); display: flex; flex-direction: column; align-items: center; gap: 10px; letter-spacing: .06em; }
.scroll-cue span { width: 22px; height: 36px; border: 1.5px solid var(--txt-3); border-radius: 12px; position: relative; }
.scroll-cue span::after { content: ''; position: absolute; left: 50%; top: 7px; width: 3px; height: 7px; margin-left: -1.5px; border-radius: 2px; background: var(--amber); animation: wheel 1.8s infinite; }
@keyframes wheel { 0% { opacity: 0; transform: translateY(0); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(12px); } }

/* =========================================================
   TICKER
   ========================================================= */
.ticker { background: var(--amber); color: var(--ink); overflow: hidden; padding: 16px 0; transform: rotate(-1.6deg) scale(1.04); position: relative; z-index: 3; border-block: 2px solid var(--ink); }
.ticker-track { display: flex; gap: 28px; width: max-content; animation: tick 40s linear infinite; font: 700 20px/1 var(--f-display); white-space: nowrap; }
@keyframes tick { to { transform: translateX(-50%); } }

/* =========================================================
   JOURNEY — pinned horizontal scroll
   ========================================================= */
.journey { position: relative; background: var(--ink); }
.journey-pin { position: sticky; top: 0; height: 100vh; overflow: hidden; display: flex; flex-direction: column; justify-content: center; gap: 44px; padding-top: 70px; }
.journey-head { width: min(1180px, 100% - var(--gutter) * 2); margin-inline: auto; }
.journey-head h2 { font-size: clamp(30px, 4.4vw, 54px); }
.journey-track { display: flex; gap: 28px; padding-left: max(var(--gutter), (100vw - 1180px) / 2); padding-right: var(--gutter); width: max-content; will-change: transform; }
.step {
  width: clamp(280px, 30vw, 380px); flex: none; position: relative; overflow: hidden;
  background: linear-gradient(160deg, var(--ink-2), var(--ink)); border: 1px solid var(--line);
  border-radius: 24px; padding: 30px 28px 170px; min-height: 420px;
  transition: border-color .4s, transform .5s var(--ease);
}
.step:hover { border-color: var(--c); transform: translateY(-6px); }
.step::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 100% 100%, var(--c), transparent 60%); opacity: .16; }
.step-no { font: italic 900 64px/1 var(--f-num); color: var(--c); display: block; margin-bottom: 18px; }
.step h3 { font-size: 26px; margin-bottom: 12px; }
.step p { color: var(--txt-2); font-size: 15.5px; position: relative; }
.step-art { position: absolute; left: 28px; right: 28px; bottom: 28px; height: 110px; border-radius: 14px; border: 1px dashed rgba(236,233,255,.18); display: flex; align-items: center; justify-content: center; }
.art-editor { flex-direction: column; align-items: flex-start; justify-content: center; gap: 8px; padding: 0 20px; }
.art-editor span { height: 7px; width: 85%; border-radius: 4px; background: rgba(236,233,255,.16); }
.art-editor .w60 { width: 55%; }
.art-editor em { position: absolute; right: 18px; top: 16px; font: italic 600 26px var(--f-num); color: var(--c); }
.art-sets b { width: 54px; height: 70px; border-radius: 8px; background: var(--paper); color: var(--ink); display: grid; place-items: center; font: 900 22px var(--f-num); margin: 0 -8px; box-shadow: 0 10px 20px rgba(0,0,0,.4); }
.art-sets b:nth-child(1) { transform: rotate(-12deg); } .art-sets b:nth-child(2) { transform: translateY(-8px); background: var(--amber); } .art-sets b:nth-child(3) { transform: rotate(12deg); }
.art-code { font-size: 30px; letter-spacing: .3em; color: var(--c); font-weight: 600; }
.art-shield, .art-check { font-size: 56px; color: var(--c); }
.art-bars { align-items: flex-end; gap: 12px; padding: 16px; }
.art-bars i { width: 26px; height: var(--h); background: var(--c); border-radius: 6px 6px 2px 2px; opacity: .85; }
.journey-progress { width: min(1180px, 100% - var(--gutter) * 2); margin-inline: auto; height: 2px; background: var(--line); border-radius: 2px; }
.journey-progress span { display: block; height: 100%; background: var(--amber); transform-origin: 0 50%; transform: scaleX(0); }

/* =========================================================
   PAPER SECTIONS
   ========================================================= */
.paper-sec {
  position: relative; background: var(--paper); color: var(--paper-ink);
  padding: clamp(100px, 13vw, 170px) 0; overflow: hidden;
  background-image: repeating-linear-gradient(transparent 0 35px, var(--rule) 35px 36px);
}
.paper-sec::before, .paper-sec::after { /* torn paper edges */
  content: ''; position: absolute; left: 0; right: 0; height: 26px; z-index: 3;
  background: var(--ink);
  -webkit-mask: radial-gradient(14px 12px at 50% 0, transparent 98%, #000) 0 100% / 28px 26px repeat-x;
  mask: radial-gradient(14px 12px at 50% 0, transparent 98%, #000) 0 100% / 28px 26px repeat-x;
}
.paper-sec::before { top: -1px; transform: scaleY(-1); }
.paper-sec::after { bottom: -1px; }
.margin-line { position: absolute; top: 0; bottom: 0; left: clamp(20px, 7vw, 110px); width: 2px; background: var(--margin); box-shadow: 6px 0 0 rgba(244,96,122,.2); }
.paper-sec .body { color: var(--paper-ink-2); }
.paper-sec .body b { color: var(--paper-ink); }
.paper-sec code { background: rgba(110,98,240,.12); color: var(--violet-d); }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 6vw, 90px); align-items: center; }
.split.rev .split-copy { order: 2; }
.split > * { min-width: 0; }
.split-art { position: relative; min-height: 480px; }
.body code { overflow-wrap: anywhere; }

.ticks { list-style: none; padding: 0; margin: 30px 0 0; display: grid; gap: 14px; }
.ticks li { position: relative; padding-left: 38px; color: var(--paper-ink-2); }
.ticks li b { color: var(--paper-ink); }
.ticks li::before { content: '✓'; position: absolute; left: 0; top: 2px; width: 24px; height: 24px; border-radius: 50%; border: 2px solid var(--violet-d); color: var(--violet-d); display: grid; place-items: center; font-size: 13px; font-weight: 800; }

.sheet { position: absolute; border-radius: 12px; }
.sheet-back { inset: 30px 10px 40px 60px; background: var(--paper-2); transform: rotate(6deg); box-shadow: 0 20px 50px -20px rgba(31,27,56,.4); }
.sheet-main {
  inset: 30px 70px 110px 0; background: #fffdf7; padding: 22px 26px;
  box-shadow: 0 30px 60px -24px rgba(31,27,56,.45), 0 0 0 1px rgba(31,27,56,.06);
  transform: rotate(-2deg);
}
.toolbar { display: flex; gap: 6px; padding-bottom: 14px; border-bottom: 1px solid rgba(31,27,56,.1); margin-bottom: 18px; flex-wrap: wrap; }
.toolbar > * { font: 600 13px/1 var(--f-body); padding: 7px 10px; border-radius: 7px; background: rgba(31,27,56,.05); color: var(--paper-ink-2); }
.toolbar .fx { background: var(--violet-d); color: #fff; }
.sheet-q { font-size: 18px; font-weight: 600; }
.qn { font: 900 22px var(--f-num); color: var(--coral); margin-right: 6px; }
.katex-like { font-family: var(--f-num); font-style: italic; font-size: 20px; white-space: nowrap; }
.katex-like sub, .katex-like sup { font-size: .6em; }
.bubbles { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 20px 0; }
.bubbles label { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1.5px solid rgba(31,27,56,.12); border-radius: 12px; font-weight: 500; }
.bubbles i { width: 18px; height: 18px; border-radius: 50%; border: 2px solid var(--paper-ink-2); }
.bubbles .ok { border-color: var(--teal); background: rgba(46,196,160,.1); }
.bubbles .ok i { border-color: var(--teal); background: radial-gradient(var(--teal) 50%, transparent 55%); }
.sheet-foot { font-size: 12.5px; color: var(--paper-ink-2); }
.ok-txt { color: #16876c; font-weight: 600; }
.sticky-note {
  position: absolute; right: -20px; bottom: -30px; width: 240px; z-index: 2; padding: 20px 20px 16px;
  background: #ffe28a; color: #3d3316; border-radius: 4px 4px 22px 4px;
  box-shadow: 0 24px 40px -18px rgba(61,51,22,.6); transform: rotate(4deg); font-size: 14px;
}
.sticky-note::before { content: ''; position: absolute; top: -12px; left: 50%; width: 90px; height: 24px; margin-left: -45px; background: rgba(255,255,255,.55); transform: rotate(-3deg); }
.sticky-note b { font-family: var(--f-display); font-size: 17px; display: block; margin-bottom: 10px; }
.sticky-note dl { margin: 0; display: grid; gap: 7px; }
.sticky-note dl div { display: flex; justify-content: space-between; align-items: center; gap: 8px; border-bottom: 1px dashed rgba(61,51,22,.25); padding-bottom: 5px; }
.sticky-note dt { color: #6b5d33; } .sticky-note dd { margin: 0; font-weight: 600; font-size: 13px; }
.toggle { display: inline-block; width: 30px; height: 17px; border-radius: 99px; background: #c9b56b; position: relative; vertical-align: middle; }
.toggle.on { background: var(--teal); }
.toggle::after { content: ''; position: absolute; top: 2px; left: 2px; width: 13px; height: 13px; border-radius: 50%; background: #fff; transition: transform .3s; }
.toggle.on::after { transform: translateX(13px); }

/* =========================================================
   SETS
   ========================================================= */
.sets-sec { position: relative; padding: clamp(110px, 14vw, 180px) 0; overflow: hidden; }
.sets-bg { position: absolute; inset: -20% 0; pointer-events: none; }
.sets-bg span { position: absolute; font: 900 clamp(90px, 14vw, 200px)/1 var(--f-display); color: transparent; -webkit-text-stroke: 1px rgba(236,233,255,.07); }
.sets-bg span:nth-child(1) { top: 6%; left: 4%; } .sets-bg span:nth-child(2) { top: 18%; right: 6%; }
.sets-bg span:nth-child(3) { top: 58%; left: 10%; } .sets-bg span:nth-child(4) { top: 70%; right: 12%; }
.sets-bg span:nth-child(5) { top: 36%; left: 44%; font-family: var(--f-num); font-style: italic; }
.sets-bg span:nth-child(6) { top: 80%; left: 40%; font-family: var(--f-num); } .sets-bg span:nth-child(7) { top: 2%; left: 62%; font-family: var(--f-num); }
.deck { display: flex; justify-content: center; gap: 0; height: 360px; perspective: 1000px; margin-top: 20px; }
.card-set {
  width: 230px; background: var(--paper); color: var(--paper-ink); border-radius: 16px; padding: 22px;
  box-shadow: 0 30px 60px -20px rgba(0,0,0,.7); margin: 0 -30px;
  transition: transform 1s var(--ease), margin 1s var(--ease);
  background-image: repeating-linear-gradient(transparent 0 33px, var(--rule) 33px 34px); background-position: 0 58px;
}
.deck.fan .card-set { margin: 0 -8px; }
.deck.fan .card-set:nth-child(1) { transform: rotate(-10deg) translateY(26px); }
.deck.fan .card-set:nth-child(3) { transform: rotate(10deg) translateY(26px); }
.card-set:nth-child(2) { z-index: 2; }
.card-set header { font: 900 26px var(--f-display); margin-bottom: 10px; display: flex; justify-content: space-between; align-items: center; }
.card-set header::after { content: '20 ข้อ'; font: 500 11px var(--f-mono); color: var(--paper-ink-2); background: rgba(31,27,56,.07); padding: 3px 8px; border-radius: 99px; }
.card-set:nth-child(1) header { color: var(--violet-d); } .card-set:nth-child(2) header { color: var(--coral); } .card-set:nth-child(3) header { color: #1a9a7c; }
.card-set ol { margin: 0; padding-left: 22px; font-size: 15px; line-height: 34px; }
.card-set li { transition: opacity .3s, transform .3s; }
.card-set li.swap { opacity: 0; transform: translateX(10px); }
.shuffle-btn { display: flex; margin: 30px auto 0; }

/* =========================================================
   ANTI-CHEAT
   ========================================================= */
.cheat-sec { position: relative; padding: clamp(110px, 14vw, 180px) 0; background: #0b0a1a; overflow: hidden; }
.scanline { position: absolute; inset: 0; background: repeating-linear-gradient(0deg, rgba(244,96,122,.035) 0 2px, transparent 2px 5px); pointer-events: none; }
.cheat-glow { position: absolute; width: 700px; height: 700px; border-radius: 50%; background: radial-gradient(circle, rgba(244,96,122,.28), transparent 65%); top: 10%; right: -10%; pointer-events: none; }
.layers { display: grid; gap: 12px; margin-top: 34px; }
.layer-card { display: flex; gap: 18px; padding: 16px 20px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255,255,255,.025); transition: border-color .3s, background .3s; }
.layer-card:hover { border-color: rgba(244,96,122,.5); background: rgba(244,96,122,.06); }
.ln { font: italic 900 28px/1 var(--f-num); color: var(--coral); }
.layer-card b { font-family: var(--f-display); font-size: 17px; }
.layer-card p { color: var(--txt-2); font-size: 14.5px; }
.terminal { position: absolute; inset: 20px 0 110px 0; background: #07060f; border: 1px solid rgba(244,96,122,.3); border-radius: 16px; overflow: hidden; box-shadow: 0 0 0 1px rgba(0,0,0,.5), 0 40px 80px -30px rgba(244,96,122,.35); }
.term-bar { display: flex; align-items: center; gap: 7px; padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,.07); }
.term-bar i { width: 11px; height: 11px; border-radius: 50%; background: #3a3654; }
.term-bar i:first-child { background: var(--coral); }
.term-bar span { margin-left: 10px; font-size: 12px; color: var(--txt-3); }
.term-body { padding: 18px; font-size: 13px; line-height: 1.95; height: calc(100% - 44px); overflow: hidden; display: flex; flex-direction: column; justify-content: flex-end; }
.term-body div { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; animation: termIn .4s var(--ease); }
.term-body .t { color: var(--txt-3); }
.term-body .a-tab { color: var(--amber); } .term-body .a-blur { color: var(--sky); } .term-body .a-dev { color: var(--coral); } .term-body .a-ok { color: var(--teal); }
.term-body .who { color: var(--txt-2); }
@keyframes termIn { from { opacity: 0; transform: translateY(8px); } }
.keys { position: absolute; left: 0; right: 0; bottom: 0; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.keys kbd {
  font: 600 13px/1 var(--f-mono); padding: 11px 13px; border-radius: 9px; color: var(--txt-2);
  background: linear-gradient(#24203f, #17142c); border: 1px solid rgba(255,255,255,.1); border-bottom-width: 3px;
  position: relative; animation: keyblock 5s infinite; animation-delay: calc(var(--k, 0) * .45s);
}
@keyframes keyblock { 0%, 70%, 100% { color: var(--txt-2); border-color: rgba(255,255,255,.1); } 78%, 88% { color: #fff; border-color: var(--coral); background: rgba(244,96,122,.25); text-decoration: line-through; } }

/* =========================================================
   GUEST
   ========================================================= */
.guest-sec { position: relative; padding: clamp(110px, 14vw, 180px) 0; background: radial-gradient(ellipse at 20% 50%, rgba(68,184,245,.12), transparent 60%), var(--ink); overflow: hidden; }
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.presets span { font-size: 14px; padding: 8px 14px; border-radius: 99px; border: 1px dashed rgba(68,184,245,.5); color: var(--sky); transition: background .3s, transform .3s var(--ease); cursor: default; }
.presets span:hover { background: rgba(68,184,245,.14); transform: translateY(-2px); }
.note { margin-top: 24px; color: var(--txt-3); font-size: 14.5px; padding-left: 16px; border-left: 2px solid var(--sky); }
.phone {
  position: absolute; left: 8%; top: 0; width: 290px; height: 560px; border-radius: 44px; padding: 12px;
  background: linear-gradient(145deg, #3a3560, #1a1738); box-shadow: 0 50px 90px -30px rgba(0,0,0,.8), 0 0 0 1px rgba(255,255,255,.08) inset;
}
.phone-notch { position: absolute; top: 20px; left: 50%; width: 90px; height: 24px; margin-left: -45px; background: #0b0a1a; border-radius: 99px; z-index: 2; }
.phone-screen { height: 100%; border-radius: 34px; background: #f2f0fb; color: #252240; padding: 64px 22px 22px; display: flex; flex-direction: column; gap: 14px; }
.ps-logo { height: 26px; width: auto; align-self: flex-start; margin-bottom: -4px; }
.ps-title { font: 800 24px var(--f-display); }
.ps-sub { font-size: 13px; color: #6e6a8a; margin-top: -10px; }
.field label { font-size: 12.5px; font-weight: 600; color: #4a4668; }
.field em { color: var(--coral); font-style: normal; }
.input { margin-top: 5px; height: 42px; border-radius: 11px; border: 1.5px solid #dcd8f0; background: #fff; padding: 0 12px; display: flex; align-items: center; font-size: 14.5px; }
.input.focus { border-color: var(--violet-d); box-shadow: 0 0 0 3px rgba(110,98,240,.15); }
.input.focus::after { content: ''; width: 1.5px; height: 18px; background: var(--violet-d); margin-left: 1px; animation: caret 1s steps(1) infinite; }
@keyframes caret { 50% { opacity: 0; } }
.ps-btn { margin-top: auto; background: var(--violet-d); color: #fff; text-align: center; padding: 14px; border-radius: 13px; font-weight: 600; box-shadow: 0 10px 24px -8px rgba(110,98,240,.7); }
.share-card { position: absolute; right: 0; bottom: 40px; width: 290px; padding: 20px; border-radius: 20px; background: rgba(30,27,62,.85); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border: 1px solid rgba(68,184,245,.3); box-shadow: 0 30px 60px -24px rgba(0,0,0,.8); }
.share-card small { color: var(--txt-3); font-size: 12px; }
.share-url { font-size: 12.5px; color: var(--sky); padding: 10px 12px; border-radius: 10px; background: rgba(0,0,0,.3); margin: 6px 0 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.share-code { display: flex; justify-content: space-between; align-items: center; }
.share-code span { font-size: 28px; font-weight: 600; letter-spacing: .2em; }
.copy { font: 600 13px var(--f-body); background: var(--sky); color: var(--ink); border: 0; padding: 8px 14px; border-radius: 99px; cursor: pointer; transition: transform .2s; }
.copy:active { transform: scale(.94); }
.copy.done { background: var(--teal); }

/* =========================================================
   RESULTS — bento
   ========================================================= */
.results-sec { padding: clamp(110px, 14vw, 180px) 0; position: relative; background: linear-gradient(var(--ink), var(--ink-2)); }
.bento { display: grid; grid-template-columns: repeat(6, 1fr); grid-auto-rows: minmax(200px, auto); gap: 18px; }
.tile { border-radius: 24px; padding: 28px; border: 1px solid var(--line); background: rgba(255,255,255,.03); position: relative; overflow: hidden; transition: border-color .4s, transform .5s var(--ease); }
.tile:hover { border-color: rgba(236,233,255,.25); transform: translateY(-4px); }
.tile h3 { font-size: 22px; margin-bottom: 8px; }
.tile p { color: var(--txt-2); font-size: 15px; }
.t-stats { grid-column: span 4; grid-row: span 2; background: linear-gradient(160deg, rgba(110,98,240,.22), rgba(255,255,255,.02)); display: flex; flex-direction: column; }
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 18px 0 20px; }
.stat-row small { color: var(--txt-3); font-size: 13px; display: block; }
.stat-row b { font: 900 clamp(34px, 4.4vw, 56px)/1.1 var(--f-num); }
.stat-row em { font-style: normal; font-size: .45em; color: var(--txt-3); }
.hist { flex: 1; min-height: 140px; display: flex; align-items: flex-end; gap: 8px; border-bottom: 1px solid var(--line); padding-bottom: 2px; }
.hist i { flex: 1; height: var(--h); border-radius: 6px 6px 0 0; background: linear-gradient(var(--violet), rgba(125,113,255,.25)); transform-origin: bottom; transform: scaleY(0); transition: transform 1.2s var(--ease); }
.hist i:nth-child(n+6) { background: linear-gradient(var(--teal), rgba(46,196,160,.25)); }
.t-stats.in .hist i { transform: scaleY(1); }
.t-stats.in .hist i:nth-child(2) { transition-delay: .05s; } .t-stats.in .hist i:nth-child(3) { transition-delay: .1s; } .t-stats.in .hist i:nth-child(4) { transition-delay: .15s; } .t-stats.in .hist i:nth-child(5) { transition-delay: .2s; } .t-stats.in .hist i:nth-child(6) { transition-delay: .25s; } .t-stats.in .hist i:nth-child(7) { transition-delay: .3s; } .t-stats.in .hist i:nth-child(8) { transition-delay: .35s; } .t-stats.in .hist i:nth-child(9) { transition-delay: .4s; } .t-stats.in .hist i:nth-child(10) { transition-delay: .45s; }
.tiny { font-size: 13px !important; margin-top: 14px; color: var(--txt-3) !important; }
.t-auto, .t-essay, .t-export, .t-auto2 { grid-column: span 2; }
.t-essay { grid-row: span 1; }
.t-export { grid-column: span 3; }
.t-auto2 { grid-column: span 3; }
.big-ico { font-size: 30px; display: inline-grid; place-items: center; width: 56px; height: 56px; border-radius: 16px; background: rgba(245,166,35,.14); color: var(--amber); margin-bottom: 18px; }
.t-essay .big-ico { background: rgba(244,96,122,.14); color: var(--coral); }
.t-auto2 .big-ico { background: rgba(68,184,245,.14); color: var(--sky); }
.grade-slider { margin-top: 16px; display: flex; align-items: center; gap: 12px; }
.grade-slider span { flex: 1; height: 6px; border-radius: 6px; background: rgba(255,255,255,.1); position: relative; }
.grade-slider span::before { content: ''; position: absolute; inset: 0 calc(100% - var(--v)) 0 0; background: var(--coral); border-radius: 6px; }
.grade-slider span::after { content: ''; position: absolute; left: var(--v); top: 50%; width: 16px; height: 16px; margin: -8px 0 0 -8px; background: #fff; border-radius: 50%; box-shadow: 0 0 0 4px rgba(244,96,122,.4); }
.grade-slider b { font-size: 14px; }
.xls { position: absolute; right: -16px; top: -16px; width: 130px; height: 130px; border-radius: 26px; background: #1d7a46; transform: rotate(14deg); display: grid; place-items: center; opacity: .9; }
.xls span { font: 900 30px var(--f-num); color: #fff; transform: rotate(-14deg); }
.t-export h3, .t-export p { position: relative; max-width: 78%; }

/* =========================================================
   GRADEBOOK
   ========================================================= */
.ink-head h2 { color: var(--paper-ink); }
.ledger-wrap { position: relative; max-width: 960px; margin: 0 auto; background: #fffdf7; border-radius: 18px; padding: 10px; box-shadow: 0 40px 80px -30px rgba(31,27,56,.45), 0 0 0 1px rgba(31,27,56,.06); overflow-x: auto; }
.ledger { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 640px; }
.ledger th { text-align: left; font: 600 13px var(--f-body); color: var(--paper-ink-2); padding: 14px 14px; border-bottom: 2px solid var(--paper-ink); vertical-align: bottom; }
.ledger th small { display: block; font: 500 11px var(--f-mono); color: #9a94b5; margin-top: 3px; }
.ledger th.linked { color: var(--violet-d); }
.ledger td { padding: 14px; border-bottom: 1px solid rgba(31,27,56,.08); }
.ledger tbody tr { transition: background .2s; }
.ledger tbody tr:hover { background: rgba(245,166,35,.1); }
.ledger td.sync { font: 600 17px var(--f-num); color: var(--paper-ink); transition: background .5s, color .5s; }
.ledger td.sync.empty { color: transparent; background: repeating-linear-gradient(45deg, rgba(31,27,56,.04) 0 6px, transparent 6px 12px); }
.ledger td.sync.flash { background: rgba(46,196,160,.22); }
.sync-btn { display: block; margin: 16px auto 8px; font: 600 15px var(--f-body); color: #fff; background: var(--violet-d); border: 0; padding: 13px 24px; border-radius: 99px; cursor: pointer; box-shadow: 0 12px 26px -10px rgba(110,98,240,.8); transition: transform .3s var(--ease); }
.sync-btn:hover { transform: translateY(-2px); }
.sync-btn.spin { pointer-events: none; opacity: .8; }

/* =========================================================
   API
   ========================================================= */
.api-sec { position: relative; padding: clamp(110px, 14vw, 180px) 0; background: radial-gradient(ellipse at 80% 30%, rgba(68,184,245,.14), transparent 55%), var(--ink); overflow: hidden; }
.endpoints { margin-top: 28px; display: grid; gap: 8px; }
.endpoints code { overflow-wrap: anywhere; }
.endpoints div { display: flex; gap: 12px; align-items: center; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line); background: rgba(255,255,255,.025); }
.endpoints code { background: none; padding: 0; color: var(--txt); }
.m { font: 600 11.5px var(--f-mono); padding: 4px 8px; border-radius: 6px; min-width: 50px; text-align: center; }
.m.get { background: rgba(46,196,160,.16); color: var(--teal); } .m.post { background: rgba(245,166,35,.16); color: var(--amber); }
.flow { position: relative; height: 220px; margin-bottom: 26px; }
.node { position: absolute; top: 50%; width: 130px; height: 130px; margin-top: -65px; border-radius: 30px; display: grid; place-content: center; text-align: center; border: 1px solid var(--line); background: var(--ink-2); z-index: 1; }
.node-ico { width: 34px; height: 34px; border-radius: 8px; margin: 0 auto 4px; }
.node b { font: 900 italic 26px var(--f-num); }
.node small { color: var(--txt-3); font-size: 12px; }
.n-student { left: 0; box-shadow: 0 0 60px -10px rgba(68,184,245,.5); border-color: rgba(68,184,245,.4); }
.n-student b { color: var(--sky); }
.n-exam { right: 0; box-shadow: 0 0 60px -10px rgba(245,166,35,.5); border-color: rgba(245,166,35,.4); }
.n-exam b { color: var(--amber); }
.flow-lines { position: absolute; left: 110px; right: 110px; top: 30px; height: 160px; width: calc(100% - 220px); overflow: visible; }
.flow-lines path { fill: none; stroke: rgba(236,233,255,.2); stroke-width: 1.5; stroke-dasharray: 4 5; vector-effect: non-scaling-stroke; }
.pkt.p1 { fill: var(--sky); filter: drop-shadow(0 0 6px var(--sky)); }
.pkt.p2 { fill: var(--amber); filter: drop-shadow(0 0 6px var(--amber)); }
.flow-lbl { position: absolute; left: 50%; transform: translateX(-50%); font: 12px var(--f-mono); color: var(--txt-3); }
.l1 { top: 4px; } .l2 { bottom: 4px; }
.code-block { margin: 0; padding: 22px; border-radius: 16px; background: #0a0918; border: 1px solid var(--line); font-size: 13px; line-height: 1.8; overflow-x: auto; color: var(--txt-2); }
.code-block .c { color: var(--txt-3); } .code-block .k { color: var(--sky); } .code-block .s { color: var(--amber); }

/* =========================================================
   THEMES
   ========================================================= */
.themes-sec { padding: clamp(110px, 14vw, 180px) 0; background: var(--ink-2); position: relative; }
.theme-lab { display: grid; grid-template-columns: 1fr 1.3fr; gap: 40px; align-items: center; }
.swatches { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.sw { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 14px; border: 1.5px solid var(--line); background: rgba(255,255,255,.03); cursor: pointer; font: 500 13px var(--f-body); color: var(--txt-2); text-align: left; transition: border-color .3s, color .3s, transform .3s var(--ease); }
.sw:hover { transform: translateY(-2px); color: var(--txt); }
.sw[aria-checked="true"] { border-color: var(--amber); color: var(--txt); background: rgba(245,166,35,.08); }
.sw .dots { display: flex; flex: none; }
.sw .dots i { width: 14px; height: 14px; border-radius: 50%; margin-right: -4px; border: 2px solid var(--ink-2); }
.sw-label { font: 500 11px var(--f-mono); color: var(--txt-3); grid-column: 1 / -1; letter-spacing: .1em; text-transform: uppercase; margin-top: 6px; }

.mock {
  --m1: #6e62f0; --m2: #f4607a; --m3: #2ec4a0; --mbg: #f2f0fb; --mcard: #fff; --mtxt: #252240;
  display: flex; border-radius: 22px; overflow: hidden; height: 360px; background: var(--mbg); color: var(--mtxt);
  box-shadow: 0 40px 90px -30px rgba(0,0,0,.8), 0 0 0 1px rgba(255,255,255,.08);
  transition: background .5s, color .5s;
}
.mock * { transition: background .5s, color .5s, border-color .5s; }
.mock-side { width: 70px; background: var(--mcard); padding: 18px 0; display: flex; flex-direction: column; align-items: center; gap: 16px; border-right: 1px solid rgba(128,128,160,.14); }
.ms-logo { width: 34px; height: 34px; border-radius: 9px; margin-bottom: 8px; }
.mock-side i { width: 30px; height: 8px; border-radius: 5px; background: var(--m1); opacity: .22; }
.mock-side i.on { opacity: 1; }
.mock-main { flex: 1; padding: 24px; display: flex; flex-direction: column; gap: 18px; min-width: 0; }
.mock-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.mock-top b { font: 800 20px var(--f-display); }
.mock-pill { font-size: 12px; padding: 6px 12px; border-radius: 99px; background: var(--m1); color: #fff; white-space: nowrap; }
.mock-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.mc { background: var(--mcard); border-radius: 14px; padding: 14px; box-shadow: 0 4px 14px rgba(0,0,0,.05); }
.mc small { font-size: 12px; opacity: .6; display: block; }
.mc b { font: 900 26px var(--f-num); color: var(--m1); }
.mc:nth-child(2) b { color: var(--m2); } .mc:nth-child(3) b { color: var(--m3); }
.mock-bars { background: var(--mcard); border-radius: 14px; padding: 18px; display: grid; gap: 12px; flex: 1; align-content: center; }
.mock-bars i { height: 12px; width: var(--w); border-radius: 6px; background: var(--m1); }
.mock-bars i.b2 { background: var(--m2); } .mock-bars i.b3 { background: var(--m3); }
.fonts { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 20px; }
.fonts span { font-size: 14px; padding: 8px 16px; border-radius: 99px; border: 1px solid var(--line); color: var(--txt-2); }
.fonts span::before { content: 'ก '; font-family: var(--f-display); color: var(--amber); font-weight: 800; }

/* =========================================================
   ROLES
   ========================================================= */
.roles-sec { position: relative; padding: clamp(110px, 14vw, 180px) 0; overflow: hidden; }
.roles-bg { position: absolute; inset: -20% 0; background: radial-gradient(circle at 15% 30%, rgba(110,98,240,.22), transparent 40%), radial-gradient(circle at 85% 70%, rgba(46,196,160,.16), transparent 40%); pointer-events: none; }
.roles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.role { padding: 28px 24px; border-radius: 22px; border: 1px solid var(--line); background: rgba(17,15,38,.6); backdrop-filter: blur(6px); position: relative; transition: transform .5s var(--ease), border-color .4s; }
.role:hover { transform: translateY(-8px); border-color: var(--c); }
.role::after { content: ''; position: absolute; left: 24px; right: 24px; top: 0; height: 2px; background: var(--c); border-radius: 0 0 4px 4px; }
.role-ico { font-size: 26px; color: var(--c); display: block; margin-bottom: 14px; }
.role h3 { font-size: 21px; margin-bottom: 10px; }
.role p { color: var(--txt-2); font-size: 14.5px; }
.trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 50px; padding-top: 40px; border-top: 1px solid var(--line); }
.trust div { display: flex; flex-direction: column; gap: 6px; }
.trust b { font-family: var(--f-display); font-size: 17px; }
.trust span { color: var(--txt-3); font-size: 14px; }

/* =========================================================
   CTA
   ========================================================= */
.cta-sec { position: relative; padding: clamp(130px, 16vw, 220px) 0; overflow: hidden; text-align: center; background: var(--violet-d); isolation: isolate; }
.cta-layer { position: absolute; inset: -30% -10%; z-index: -1; pointer-events: none; }
.cta-l1 { background-image: radial-gradient(circle, rgba(255,255,255,.22) 2px, transparent 2.5px); background-size: 34px 34px; mask-image: radial-gradient(ellipse at center, #000 10%, transparent 70%); -webkit-mask-image: radial-gradient(ellipse at center, #000 10%, transparent 70%); }
.cta-l2 { background: radial-gradient(circle at 20% 80%, var(--coral), transparent 35%), radial-gradient(circle at 85% 15%, var(--sky), transparent 35%); opacity: .6; filter: blur(30px); }
.cta-logo {
  display: inline-block; background: #fffdf7; padding: 22px 34px; border-radius: 22px; margin-bottom: 36px;
  transform: rotate(-3deg); box-shadow: 0 30px 60px -20px rgba(17,15,38,.6), 0 0 0 6px rgba(255,255,255,.18);
  position: relative;
}
.cta-logo::before { content: ''; position: absolute; top: -12px; left: 50%; width: 90px; height: 24px; margin-left: -45px; background: rgba(255,226,138,.85); transform: rotate(4deg); }
.cta-logo img { height: clamp(56px, 8vw, 92px); width: auto; }
.cta-inner h2 { font-size: clamp(36px, 6vw, 76px); font-weight: 900; }
.cta-sec .hl { color: var(--ink); }
.cta-sec .body { color: rgba(255,255,255,.85); margin-inline: auto; }
.cta-sec .hero-actions { justify-content: center; }
.cta-sec .btn-line { border-color: rgba(255,255,255,.5); }

/* footer */
.foot { background: #0b0a1a; padding: 36px 0; border-top: 1px solid var(--line); }
.foot-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.foot p { color: var(--txt-3); font-size: 14px; }
.foot nav { display: flex; gap: 20px; }
.foot nav a { color: var(--txt-2); font-size: 14px; }
.foot nav a:hover { color: var(--amber); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; position: absolute; top: calc(100% + 8px); left: 0; right: 0; flex-direction: column; padding: 12px; border-radius: 22px; background: rgba(17,15,38,.96); border: 1px solid var(--line); backdrop-filter: blur(16px); }
  .nav-links.open a { padding: 12px 16px; }
  .burger { display: flex; }
  .nav-cta { margin-left: 0; }
  .roles { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  body { font-size: 16px; }
  .hero { padding-top: 120px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-stage { height: 520px; max-width: 460px; width: 100%; margin: 10px auto 0; }
  .split { grid-template-columns: 1fr; }
  .split.rev .split-copy { order: 0; }
  .split-art { min-height: 460px; }
  .theme-lab { grid-template-columns: 1fr; }
  .bento { grid-template-columns: 1fr 1fr; }
  .t-stats { grid-column: 1 / -1; grid-row: auto; }
  .t-auto, .t-essay, .t-export, .t-auto2 { grid-column: span 1; }
  .trust { grid-template-columns: 1fr; }
  .phone { left: 0; }
}
@media (max-width: 600px) {
  .nav { top: 8px; padding: 8px 8px 8px 14px; }
  .nav-cta .btn-ghost { display: none; }
  .nav-cta .btn { padding: 10px 14px; font-size: 14px; }
  .brand { padding: 6px 12px; }
  .brand-logo { height: 24px; }
  .node-ico { width: 24px; height: 24px; }
  .hero h1 { font-size: clamp(36px, 11vw, 52px); }
  .hero-meta { gap: 22px; }
  .hero-stage { height: 470px; }
  .paper { width: 300px; margin-left: -150px; padding: 18px 18px 14px; top: 80px; }
  .timer { right: -4px; top: 6px; }
  .code { top: 0; left: -4px; }
  .alert { left: -6px; bottom: 50px; }
  .score { right: -6px; bottom: 0; }
  .omr { display: none; }
  .scroll-cue { display: none; }
  .step { min-height: 380px; padding-bottom: 150px; }
  .step-no { font-size: 52px; }
  .sheet-main { inset: 20px 10px 90px 0; padding: 18px; }
  .sheet-back { inset: 0 0 110px 30px; }
  .sticky-note { width: 210px; right: 0; bottom: 0; }
  .bubbles { grid-template-columns: 1fr; }
  .deck { height: auto; flex-direction: column; align-items: center; gap: 14px; }
  .card-set { margin: 0; width: 100%; max-width: 300px; transform: none !important; }
  .card-set ol { columns: 1; }
  .bento { grid-template-columns: 1fr; }
  .t-auto, .t-essay, .t-export, .t-auto2 { grid-column: 1 / -1; }
  .stat-row { gap: 8px; }
  .roles { grid-template-columns: 1fr; }
  .phone { width: 250px; height: 480px; left: 0; }
  .phone-screen { padding: 56px 16px 16px; gap: 10px; }
  .share-card { width: 230px; bottom: -10px; padding: 16px; }
  .share-code span { font-size: 22px; }
  .split-art { min-height: 500px; }
  .flow { height: 180px; }
  .node { width: 96px; height: 96px; margin-top: -48px; border-radius: 22px; }
  .node b { font-size: 20px; }
  .flow-lines { left: 80px; right: 80px; width: calc(100% - 160px); top: 20px; height: 140px; }
  .terminal { inset: 0 0 130px 0; }
  .term-body { font-size: 11.5px; padding: 14px; }
  .mock { height: 320px; }
  .mock-side { width: 52px; }
  .mock-main { padding: 16px; }
  .mc { padding: 10px; } .mc b { font-size: 20px; }
  .foot-inner { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
  [data-speed] { translate: none !important; }
  .js .reveal { opacity: 1; transform: none; }
}