@import url('https://fonts.googleapis.com/css2?family=Chakra+Petch:wght@400;500;600;700&family=Noto+Sans+Thai:wght@300;400;500;600;700&display=swap');

:root {
  --ink: #eaf7f5;
  --muted: #86a3a4;
  --panel: rgba(10, 25, 38, .84);
  --line: rgba(155, 230, 219, .15);
  --cyan: #5eead4;
  --red: #ff5d66;
  --bg: #050d17;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 70% 10%, rgba(25, 101, 110, .2), transparent 32rem),
    linear-gradient(150deg, #06111d, #030810 65%);
  color: var(--ink);
  font-family: "Noto Sans Thai", sans-serif;
  min-height: 100vh;
}
body::before {
  content: "";
  position: fixed; inset: 0; pointer-events: none; opacity: .14;
  background-image: linear-gradient(rgba(94, 234, 212, .16) 1px, transparent 1px), linear-gradient(90deg, rgba(94, 234, 212, .12) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}
button, a { font: inherit; }
button { color: inherit; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.noise { position: fixed; inset: 0; pointer-events: none; opacity: .025; z-index: 20; background: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.topbar {
  height: 80px; padding: 0 clamp(24px, 5vw, 76px); display: flex; align-items: center; justify-content: space-between;
  border-bottom: 1px solid var(--line); position: relative; z-index: 10; background: rgba(4, 12, 20, .65); backdrop-filter: blur(18px);
}
.brand { color: var(--ink); text-decoration: none; display: flex; align-items: center; gap: 14px; font-family: "Chakra Petch", sans-serif; }
.brand-mark { display: grid; place-items: center; width: 46px; height: 42px; font-size: 18px; font-weight: 700; border: 1px solid var(--cyan); clip-path: polygon(12% 0,100% 0,100% 78%,86% 100%,0 100%,0 20%); }
.brand-mark span { color: var(--cyan); }
.brand-copy { font-size: 13px; letter-spacing: .13em; line-height: 1.1; }
.brand-copy b { display: block; color: var(--cyan); font-size: 9px; margin-top: 5px; letter-spacing: .22em; }
.player-stats { display: flex; align-items: center; gap: clamp(18px, 3vw, 42px); font-family: "Chakra Petch", sans-serif; }
.player-stats > span { display: grid; }
.player-stats small { color: var(--muted); font-size: 8px; letter-spacing: .2em; }
.player-stats b { font-size: 13px; letter-spacing: .12em; }
.icon-button { border: 1px solid var(--line); width: 36px; height: 36px; background: transparent; cursor: pointer; }
.screen { display: none; }
.screen.active { display: block; }
.hero { width: min(46vw, 680px); padding: clamp(70px, 10vh, 130px) 0 80px clamp(24px, 8vw, 120px); position: relative; z-index: 2; }
.eyebrow, .kicker { color: var(--cyan); font: 600 10px/1 "Chakra Petch", sans-serif; letter-spacing: .25em; }
.eyebrow { display: flex; align-items: center; gap: 10px; }
.eyebrow i { width: 7px; height: 7px; background: var(--red); border-radius: 50%; box-shadow: 0 0 14px var(--red); animation: blink 1.2s infinite; }
.hero h1 { margin: 28px 0 24px; font: 700 clamp(50px, 6.6vw, 108px)/.91 "Chakra Petch", "Noto Sans Thai", sans-serif; letter-spacing: -.06em; }
.hero h1 em { color: transparent; font-style: normal; -webkit-text-stroke: 1px var(--red); text-shadow: 0 0 35px rgba(255, 93, 102, .25); }
.hero-lead { color: #a8babb; font-weight: 300; line-height: 1.85; max-width: 520px; font-size: 16px; }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 34px; }
.primary-button, .secondary-button { border: 0; cursor: pointer; min-height: 54px; padding: 0 8px 0 22px; display: inline-flex; align-items: center; gap: 24px; text-transform: uppercase; font-weight: 700; letter-spacing: .04em; }
.primary-button { background: var(--cyan); color: #04201d; box-shadow: 0 0 34px rgba(94, 234, 212, .14); }
.primary-button b { width: 40px; height: 40px; display: grid; place-items: center; background: rgba(0,0,0,.11); font-size: 20px; }
.primary-button:hover { filter: brightness(1.08); transform: translateY(-1px); }
.text-button { color: var(--muted); border: 0; border-bottom: 1px solid rgba(134,163,164,.3); background: transparent; cursor: pointer; padding: 8px 0; font-size: 12px; }
.lab-launch { border-color: rgba(94,234,212,.35); color: var(--cyan); gap: 14px; }
.lab-launch b { font: 500 20px "Chakra Petch"; }
.reset-progress { margin-top: 18px; }
.mission-brief { display: grid; grid-template-columns: auto 1fr auto 1fr; align-items: center; gap: 12px; border-top: 1px solid var(--line); margin-top: 52px; padding-top: 24px; max-width: 520px; }
.mission-brief > span { font: 600 30px "Chakra Petch", sans-serif; color: var(--cyan); }
.mission-brief p { margin: 0; color: var(--muted); font-size: 10px; line-height: 1.5; letter-spacing: .05em; }
.mission-brief b { color: var(--ink); }
.network-stage { position: absolute; right: 3vw; top: 120px; width: min(51vw, 720px); height: 650px; }
.radar { position: absolute; width: 500px; height: 500px; border: 1px solid var(--line); border-radius: 50%; left: 50%; top: 50%; transform: translate(-50%,-50%); }
.radar::before, .radar::after, .radar span { content: ""; position: absolute; border: 1px solid var(--line); border-radius: 50%; inset: 16%; }
.radar::after { inset: 34%; }
.radar span:nth-child(1) { inset: 50% -10% auto; height: 1px; border: 0; border-top: 1px solid var(--line); border-radius: 0; }
.radar span:nth-child(2) { inset: -10% 50% -10% auto; width: 1px; border: 0; border-left: 1px solid var(--line); border-radius: 0; }
.radar span:nth-child(3) { inset: 0; border: 0; background: conic-gradient(from 30deg, rgba(94,234,212,.2), transparent 20%); animation: rotate 6s linear infinite; }
.core-node { position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); display: grid; place-items: center; width: 120px; height: 120px; border: 1px solid var(--red); background: rgba(255,93,102,.06); clip-path: polygon(50% 0,93% 25%,93% 75%,50% 100%,7% 75%,7% 25%); font: 600 15px "Chakra Petch", sans-serif; z-index: 2; }
.core-node i { position: absolute; inset: 14px; border: 1px dashed rgba(255,93,102,.5); clip-path: inherit; }
.core-node small { font-size: 7px; color: var(--red); }
.satellite { position: absolute; width: 64px; height: 64px; border: 1px solid var(--cyan); background: #07151f; display: grid; place-items: center; border-radius: 50%; font: 600 11px "Chakra Petch"; box-shadow: 0 0 24px rgba(94,234,212,.15); }
.sat-a { left: 14%; top: 20%; }.sat-b { right: 8%; top: 22%; }.sat-c { right: 15%; bottom: 15%; }
.links { position: absolute; inset: 25px 0 0 60px; width: 600px; height: 600px; overflow: visible; }
.links path { fill: none; stroke: rgba(94,234,212,.2); stroke-width: 1; }
.links .pulse-path { stroke: var(--cyan); stroke-dasharray: 4 22; animation: dash 2s linear infinite; }
.alert-card { position: absolute; bottom: 19%; left: 8%; padding: 13px 16px; border: 1px solid rgba(255,93,102,.5); background: rgba(18,14,23,.85); display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; min-width: 160px; }
.alert-card i { grid-row: 1/3; color: var(--red); font: 700 26px "Chakra Petch"; }.alert-card span { font: 500 8px "Chakra Petch"; letter-spacing: .18em; color: var(--muted); }.alert-card b { color: var(--red); font: 600 19px "Chakra Petch"; }
.scroll-cue { position: absolute; right: 5vw; bottom: 30px; color: var(--muted); writing-mode: vertical-rl; font: 500 8px "Chakra Petch"; letter-spacing: .2em; }.scroll-cue span { color: var(--cyan); font-size: 18px; margin-top: 10px; }
.mission-section { padding: 100px clamp(24px, 7vw, 110px) 120px; background: rgba(2,8,14,.68); border-top: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; align-items: end; margin-bottom: 45px; }
.section-heading h2 { margin: 12px 0 0; font: 600 clamp(34px,4vw,56px) "Chakra Petch", "Noto Sans Thai"; }
.section-heading > p { max-width: 400px; color: var(--muted); font-size: 13px; text-align: right; }
.mission-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.mission-card { min-height: 320px; padding: 20px; background: linear-gradient(145deg, rgba(15,34,45,.9), rgba(7,17,27,.8)); border: 1px solid var(--line); position: relative; overflow: hidden; transition: .25s ease; }
.mission-card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 90% 0, color-mix(in srgb, var(--mission) 12%, transparent), transparent 45%); pointer-events: none; }
.mission-card:hover:not(.locked) { transform: translateY(-5px); border-color: color-mix(in srgb, var(--mission) 55%, transparent); }
.mission-number { color: var(--mission); font: 500 12px "Chakra Petch"; }
.card-status { position: absolute; top: 18px; right: 18px; font: 600 7px "Chakra Petch"; letter-spacing: .2em; color: var(--mission); }
.card-status::before { content: ""; display: inline-block; width: 5px; height: 5px; background: currentColor; border-radius: 50%; margin-right: 6px; box-shadow: 0 0 8px currentColor; }
.card-line { width: 32px; height: 1px; background: var(--mission); margin: 52px 0 18px; }
.mission-card > span { color: var(--mission); font: 500 8px "Chakra Petch"; letter-spacing: .2em; }
.mission-card h3 { margin: 9px 0; font-size: 22px; }.mission-card p { color: var(--muted); font-size: 12px; line-height: 1.7; }
.card-footer { position: absolute; left: 20px; right: 20px; bottom: 20px; border-top: 1px solid var(--line); padding-top: 14px; display: flex; align-items: center; justify-content: space-between; }
.card-footer small { font: 500 8px "Chakra Petch"; color: var(--muted); }.card-footer button { border: 0; background: transparent; color: var(--mission); cursor: pointer; font: 600 10px "Chakra Petch"; letter-spacing: .1em; }
.mission-card.locked { filter: grayscale(1); opacity: .4; }.mission-card.complete { border-bottom-color: var(--mission); }
.game-screen { min-height: calc(100vh - 80px); padding: 28px clamp(18px,4vw,64px) 70px; }
.game-shell { max-width: 1440px; margin: 0 auto; }
.game-header { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 16px 0 24px; }
.back-button { justify-self: start; border: 0; color: var(--muted); background: none; cursor: pointer; font-size: 12px; }.back-button:hover { color: var(--ink); }
.mission-identity { text-align: center; display: grid; gap: 5px; }.mission-identity small { color: var(--cyan); font: 500 8px "Chakra Petch"; letter-spacing: .2em; }.mission-identity b { font-size: 15px; }
.signal-meter { justify-self: end; display: flex; align-items: end; gap: 5px; height: 25px; }.signal-meter i { display: block; width: 6px; height: 10px; background: #26333c; }.signal-meter i:nth-child(2){height:16px}.signal-meter i:nth-child(3){height:23px}.signal-meter i.live { background: var(--cyan); box-shadow: 0 0 10px rgba(94,234,212,.45); }
.progress-track { height: 2px; background: var(--line); }.progress-track i { display: block; height: 100%; background: var(--cyan); transition: width .35s ease; }
.lesson-panel { min-height: 620px; margin-top: 28px; border: 1px solid var(--line); padding: clamp(30px,5vw,76px); background: linear-gradient(145deg, rgba(12,30,42,.92), rgba(4,13,22,.9)); position: relative; overflow: hidden; }.lesson-panel::after{content:"";position:absolute;right:-110px;top:-110px;width:380px;height:380px;border:1px solid rgba(94,234,212,.12);border-radius:50%;box-shadow:0 0 0 70px rgba(94,234,212,.025),0 0 0 140px rgba(94,234,212,.018)}.lesson-header{display:flex;align-items:start;justify-content:space-between;gap:28px;position:relative;z-index:1}.lesson-header h2{margin:12px 0 10px;font-size:clamp(34px,4.5vw,62px);font-family:"Chakra Petch","Noto Sans Thai"}.lesson-header p{max-width:750px;margin:0;color:#a9bcbd;font-size:16px;line-height:1.8}.study-badge{width:110px;height:110px;flex:0 0 110px;display:grid;place-items:center;align-content:center;border:1px solid var(--cyan);clip-path:polygon(50% 0,94% 25%,94% 75%,50% 100%,6% 75%,6% 25%);background:rgba(94,234,212,.06);font-family:"Chakra Petch"}.study-badge span{color:var(--cyan);font-size:7px;letter-spacing:.15em}.study-badge b{font-size:22px}.study-badge small{color:var(--muted);font-size:8px}.lesson-grid{display:grid;grid-template-columns:1.1fr 1fr .9fr;gap:14px;margin-top:48px;position:relative;z-index:1}.lesson-card{min-height:210px;border:1px solid var(--line);padding:24px;background:rgba(5,17,28,.63)}.lesson-card>span{color:var(--cyan);font:600 8px "Chakra Petch";letter-spacing:.2em}.lesson-card ul{display:grid;gap:13px;margin:20px 0 0;padding:0;list-style:none}.lesson-card li{padding-left:16px;position:relative;color:#c1d3d3;font-size:12px;line-height:1.7}.lesson-card li::before{content:"→";position:absolute;left:0;color:var(--cyan)}.lesson-card.memory{border-color:rgba(253,186,116,.3);background:rgba(253,186,116,.045)}.lesson-card.memory>span{color:#fdba74}.lesson-card.memory p{font:600 19px/1.6 "Chakra Petch","Noto Sans Thai";color:#fff0cf;margin:20px 0}.lesson-example{border-top:1px solid rgba(253,186,116,.2);padding-top:14px;color:#bea983;font-size:10px;line-height:1.7}.lesson-card.trap{border-color:rgba(255,93,102,.28);background:rgba(255,93,102,.04)}.lesson-card.trap>span{color:var(--red)}.lesson-card.trap p{margin-top:20px;color:#d9b4b8;font-size:13px;line-height:1.8}.lesson-footer{position:relative;z-index:1;margin-top:22px;padding-top:20px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px}.lesson-footer p{margin:0;color:var(--muted);font-size:11px}.lesson-footer p i{display:inline-grid;place-items:center;width:17px;height:17px;border:1px solid var(--cyan);color:var(--cyan);font-style:normal;margin-right:7px}
.console-layout { display: grid; grid-template-columns: .78fr 1.22fr; min-height: 650px; margin-top: 28px; border: 1px solid var(--line); background: rgba(5,14,24,.62); }
.packet-console { padding: clamp(24px,3vw,48px); border-right: 1px solid var(--line); background: radial-gradient(circle at 50% 42%, rgba(94,234,212,.08), transparent 50%); }
.console-title { color: var(--muted); font: 500 8px "Chakra Petch"; letter-spacing: .2em; }.console-title span { display: inline-block; width: 6px; height: 6px; background: var(--cyan); border-radius: 50%; margin-right: 8px; }
.packet-visual { display: flex; flex-direction: column; align-items: center; min-height: 430px; justify-content: center; }
.trace-node { width: 112px; height: 55px; border: 1px solid rgba(94,234,212,.25); display: grid; place-items: center; position: relative; color: #779a9b; font: 600 9px "Chakra Petch"; letter-spacing: .15em; background: #07141f; }
.trace-node i { position: absolute; left: -4px; width: 7px; height: 7px; border-radius: 50%; background: #294144; }.trace-node.hot { border-color: var(--cyan); color: var(--ink); box-shadow: 0 0 30px rgba(94,234,212,.12); }.trace-node.hot i { background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
.trace-link { width: 1px; height: 22px; background: repeating-linear-gradient(to bottom,var(--cyan) 0 3px, transparent 3px 7px); opacity: .5; }
.terminal { border-top: 1px solid var(--line); padding-top: 15px; color: #527173; font: 400 9px/1.8 "Chakra Petch"; }.terminal p { margin: 0; }.cursor { color: var(--cyan); animation: blink .8s infinite; }
.question-panel { padding: clamp(32px, 5vw, 76px); display: flex; flex-direction: column; }
.question-meta { display: flex; justify-content: space-between; color: var(--muted); font: 500 9px "Chakra Petch"; letter-spacing: .18em; }.question-meta span:last-child { color: var(--cyan); }
.question-panel h2 { font-size: clamp(24px, 2.5vw, 38px); line-height: 1.45; margin: 38px 0 32px; max-width: 800px; }
.answer-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.answer-button { min-height: 74px; display: grid; grid-template-columns: 38px 1fr auto; gap: 12px; align-items: center; text-align: left; border: 1px solid var(--line); background: rgba(13,29,42,.75); padding: 13px; cursor: pointer; transition: .18s; }
.answer-button span { width: 34px; height: 34px; display: grid; place-items: center; border: 1px solid rgba(94,234,212,.2); color: var(--cyan); font: 600 12px "Chakra Petch"; }.answer-button b { font-size: 13px; font-weight: 500; line-height: 1.5; }.answer-button i { color: #456064; font-style: normal; }
.answer-button:hover:not(:disabled) { border-color: var(--cyan); transform: translateX(2px); }.answer-button.correct { border-color: var(--cyan); background: rgba(94,234,212,.11); }.answer-button.wrong { border-color: var(--red); background: rgba(255,93,102,.09); }.answer-button.eliminated { opacity: .2; text-decoration: line-through; }
.assist-row { margin-top: 22px; display: flex; justify-content: space-between; align-items: center; color: var(--muted); font: 500 9px "Chakra Petch"; letter-spacing: .15em; }
.hint-button { border: 0; background: transparent; color: var(--cyan); cursor: pointer; padding: 8px 0; font: 500 9px "Chakra Petch"; letter-spacing: .12em; }.hint-button small { color: var(--muted); margin-left: 7px; }.hint-button:disabled { color: #4f6669; cursor: default; }
.feedback-panel { margin-top: auto; border-top: 1px solid var(--line); padding-top: 24px; align-items: center; justify-content: space-between; gap: 20px; }.feedback-panel:not([hidden]) { display: flex; }.feedback-panel > div { display: flex; align-items: center; gap: 15px; }.feedback-panel > div > span { flex: 0 0 40px; height: 40px; display: grid; place-items: center; border: 1px solid currentColor; font: 700 20px "Chakra Petch"; }.feedback-panel p { display: grid; margin: 0; gap: 6px; }.feedback-panel b { font: 600 10px "Chakra Petch"; letter-spacing: .12em; }.feedback-panel small { color: #a8babb; line-height: 1.5; }.feedback-panel.success { color: var(--cyan); }.feedback-panel.failure { color: var(--red); }.compact { min-height: 46px; font-size: 11px; white-space: nowrap; }
.result-screen { min-height: calc(100vh - 80px); padding: 70px 24px; }.result-card { width: min(680px, 100%); margin: 0 auto; text-align: center; padding: clamp(40px,7vw,80px); border: 1px solid var(--line); background: var(--panel); position: relative; }.result-card::before,.result-card::after { content:""; position:absolute; width:26px;height:26px;border-color:var(--cyan); }.result-card::before{left:-1px;top:-1px;border-left:2px solid;border-top:2px solid}.result-card::after{right:-1px;bottom:-1px;border-right:2px solid;border-bottom:2px solid}
.result-seal { width: 88px; height: 88px; display: grid; place-items: center; margin: 0 auto 28px; border: 1px solid; clip-path: polygon(50% 0,94% 25%,94% 75%,50% 100%,6% 75%,6% 25%); font: 700 36px "Chakra Petch"; }.result-seal.pass { color: var(--cyan); background: rgba(94,234,212,.08); }.result-seal.fail { color: var(--red); background: rgba(255,93,102,.08); }.result-card h2 { font-size: clamp(30px,5vw,48px); margin: 14px 0; }.result-card > p { color: var(--muted); line-height: 1.7; }
.result-stats { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--line); margin: 38px 0; }.result-stats div { padding: 18px; display: grid; gap: 5px; }.result-stats div+div { border-left: 1px solid var(--line); }.result-stats small { color: var(--muted); font-size: 10px; }.result-stats b { color: var(--cyan); font: 600 25px "Chakra Petch"; }.result-actions { display:flex; gap:12px; justify-content:center; }.secondary-button { border: 1px solid var(--line); background: transparent; padding: 0 20px; }
/* Interactive wiring lab */
.wiring-screen { min-height: calc(100vh - 80px); padding: 26px clamp(18px, 3.8vw, 62px) 70px; }
.wiring-shell { width: min(1540px, 100%); margin: 0 auto; }
.wiring-topline { min-height: 44px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; }
.lab-mode-label { color: var(--cyan); font: 600 8px "Chakra Petch"; letter-spacing: .22em; }
.lab-mode-label i { display:inline-block; width:6px; height:6px; margin-right:8px; background:var(--cyan); border-radius:50%; box-shadow:0 0 10px var(--cyan); }
.lab-score { justify-self: end; color: var(--muted); font: 500 9px "Chakra Petch"; letter-spacing: .16em; }.lab-score b { color: var(--cyan); margin-left: 8px; }
.lab-intro { padding: 24px 0 22px; display: flex; align-items: end; justify-content: space-between; border-bottom: 1px solid var(--line); }
.lab-intro h1 { margin: 10px 0 3px; font: 600 clamp(30px, 3.2vw, 50px) "Chakra Petch", "Noto Sans Thai"; }.lab-intro p { margin:0; color:var(--muted); font-size:13px; }
.lab-steps { display:flex; align-items:center; gap:10px; color:var(--muted); font:500 8px "Chakra Petch"; letter-spacing:.08em; padding-bottom:8px; }.lab-steps span { display:flex; align-items:center; gap:6px; white-space:nowrap; }.lab-steps b { width:20px;height:20px;display:grid;place-items:center;border:1px solid rgba(94,234,212,.3);color:var(--cyan); }.lab-steps i { width:24px; height:1px; background:var(--line); }
.lab-tabs { display:flex; gap:8px; padding:14px 0; overflow-x:auto; scrollbar-width:thin; }.lab-tab { min-width:180px; border:1px solid var(--line); background:rgba(8,21,31,.68); padding:10px 14px; text-align:left; cursor:pointer; display:grid; grid-template-columns:auto 1fr auto; align-items:center; gap:9px; }.lab-tab > span { width:25px;height:25px;display:grid;place-items:center;border:1px solid var(--line);color:var(--muted);font:600 9px "Chakra Petch"; }.lab-tab p { margin:0;display:grid;gap:2px; }.lab-tab b { font-size:11px; }.lab-tab small { color:var(--muted);font:500 7px "Chakra Petch";letter-spacing:.1em; }.lab-tab > i { color:var(--muted);font-style:normal; }.lab-tab.active { border-color:var(--cyan);background:rgba(94,234,212,.08); }.lab-tab.active > span,.lab-tab.complete > span { color:var(--cyan);border-color:var(--cyan); }.lab-tab.locked { opacity:.35;cursor:not-allowed; }
.wiring-workbench { min-height:640px; display:grid; grid-template-columns:210px minmax(560px,1fr) 250px; border:1px solid var(--line); background:rgba(4,13,21,.72); }
.cable-rack,.diagnostic-panel { padding:22px 16px; background:rgba(8,21,31,.74); }.cable-rack { border-right:1px solid var(--line); }.diagnostic-panel { border-left:1px solid var(--line); display:flex;flex-direction:column; }
.rack-heading { display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line); }.rack-heading span { color:var(--ink);font:600 8px "Chakra Petch";letter-spacing:.18em; }.rack-heading small { color:var(--muted);font-size:7px; }
.cable-list { display:grid;gap:8px;padding:18px 0; }.cable-choice { --cable:#5eead4; min-height:66px;border:1px solid var(--line);background:#091722;cursor:pointer;padding:10px;display:grid;grid-template-columns:36px 1fr;gap:9px;text-align:left;align-items:center; }.cable-choice:hover,.cable-choice.active { border-color:var(--cable);background:color-mix(in srgb,var(--cable) 8%,#091722); }.cable-swatch { width:34px;height:34px;border:1px solid color-mix(in srgb,var(--cable) 60%,transparent);display:grid;place-items:center;color:var(--cable);font:600 7px "Chakra Petch";position:relative; }.cable-swatch::before,.cable-swatch::after { content:"";position:absolute;width:5px;height:3px;background:var(--cable);top:15px; }.cable-swatch::before{left:-4px}.cable-swatch::after{right:-4px}.cable-choice p { margin:0;display:grid;gap:3px; }.cable-choice b { font-size:10px; }.cable-choice small { color:var(--muted);font-size:8px; }
.cable-lesson { border:1px solid rgba(103,232,249,.24);background:linear-gradient(145deg,rgba(103,232,249,.07),rgba(7,22,32,.42));padding:12px;margin-bottom:12px;display:grid;gap:6px; }.cable-lesson>span { color:#67e8f9;font:600 7px "Chakra Petch";letter-spacing:.16em; }.cable-lesson b { color:#d6f8f4;font-size:10px;line-height:1.45; }.cable-lesson p { margin:0;color:#a9bbbd;font-size:9px;line-height:1.65; }.cable-lesson small { color:#789799;font-size:8px;line-height:1.55; }.cable-lesson strong { font-size:8px;line-height:1.55; }.cable-lesson strong.correct { color:var(--cyan); }.cable-lesson strong.wrong { color:var(--red); }
.rack-hint { margin-top:15px;border:1px solid rgba(253,186,116,.2);background:rgba(253,186,116,.045);padding:13px; }.rack-hint span { color:#fdba74;font:600 7px "Chakra Petch";letter-spacing:.16em; }.rack-hint p { color:#9caaac;font-size:9px;line-height:1.7;margin:7px 0 0; }
.topology-panel { min-width:0;display:flex;flex-direction:column; }.topology-toolbar { height:58px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);color:var(--muted);font:500 8px "Chakra Petch";letter-spacing:.15em; }.topology-toolbar > span i { display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--cyan);margin-right:8px; }.topology-toolbar button { border:0;background:transparent;color:var(--muted);font-size:8px;cursor:pointer;margin-left:12px; }.topology-toolbar button:hover:not(:disabled){color:var(--cyan)}.topology-toolbar button:disabled{opacity:.3;cursor:default}
.topology-canvas { position:relative;flex:1;min-height:520px;overflow:hidden;background:radial-gradient(circle at 50% 50%,rgba(94,234,212,.055),transparent 45%); }.topology-canvas::before { content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(94,234,212,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(94,234,212,.05) 1px,transparent 1px);background-size:32px 32px;mask-image:radial-gradient(circle at center,black,transparent 78%); }
.cable-canvas,.device-layer { position:absolute;inset:0;width:100%;height:100%; }.cable-line { fill:none;stroke-width:4;stroke-linecap:round;filter:drop-shadow(0 0 4px currentColor);opacity:.86;stroke-dasharray:8 5;animation:dash 3s linear infinite; }.cable-line.passed{stroke:#5eead4!important;stroke-dasharray:none;}.cable-line.failed{stroke:var(--red)!important;animation:none;}.cable-plug { stroke-width:2;fill:#07141f; }
.network-device { position:absolute;transform:translate(-50%,-50%);width:144px;min-height:100px;background:#091722;border:1px solid rgba(125,180,179,.28);padding:10px;z-index:2;box-shadow:0 14px 35px rgba(0,0,0,.2); }.network-device::before { content:"";position:absolute;left:-1px;top:-1px;width:14px;height:14px;border-left:2px solid var(--cyan);border-top:2px solid var(--cyan);opacity:.55; }.device-face { display:grid;grid-template-columns:32px 1fr;gap:8px;align-items:center;padding-bottom:9px;border-bottom:1px solid var(--line); }.device-icon { width:32px;height:32px;display:grid;place-items:center;border:1px solid rgba(94,234,212,.28);color:var(--cyan);font:600 13px "Chakra Petch"; }.device-face p { margin:0;display:grid;gap:2px;min-width:0; }.device-face b { font:600 8px "Chakra Petch";white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }.device-face small { color:var(--muted);font-size:7px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }.device-ports { display:flex;justify-content:center;gap:5px;padding-top:9px;flex-wrap:wrap; }.port-button { border:1px solid rgba(125,180,179,.24);background:#050e16;color:#779a9b;cursor:pointer;padding:5px 7px;font:600 7px "Chakra Petch";position:relative; }.port-button::before { content:"";display:inline-block;width:5px;height:5px;background:#30494b;margin-right:5px;border-radius:1px; }.port-button:hover:not(:disabled),.port-button.selected { border-color:var(--cyan);color:var(--cyan); }.port-button.selected::before { background:var(--cyan);box-shadow:0 0 8px var(--cyan); }.port-button.occupied::before { background:#fdba74; }.port-button:disabled { cursor:not-allowed;opacity:.65; }
.port-prompt { position:absolute;left:50%;bottom:14px;transform:translateX(-50%);padding:8px 12px;border:1px solid var(--line);background:rgba(4,13,21,.88);color:var(--muted);font-size:9px;white-space:nowrap;z-index:3; }.port-prompt.active { color:var(--cyan);border-color:rgba(94,234,212,.35); }
.link-legend { height:42px;padding:0 18px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:flex-end;gap:16px;color:var(--muted);font-size:7px; }.led { display:inline-block;width:6px;height:6px;border-radius:50%;margin-right:5px;background:#425254; }.led.up{background:var(--cyan);box-shadow:0 0 7px var(--cyan)}.led.down{background:var(--red);box-shadow:0 0 7px var(--red)}
.connection-list { padding:14px 0;display:grid;gap:6px;min-height:230px; }.empty-links { color:#4d686a;text-align:center;padding:45px 8px;font-size:9px;line-height:1.7; }.connection-item { --wire:#5eead4;display:grid;grid-template-columns:6px 1fr auto;gap:8px;align-items:center;border:1px solid var(--line);padding:9px;background:#081620; }.connection-item > i { width:6px;min-height:42px;height:100%;background:var(--wire);opacity:.75; }.connection-item p { margin:0;display:grid;gap:3px;min-width:0; }.connection-item b { font:500 7px "Chakra Petch";white-space:nowrap;overflow:hidden;text-overflow:ellipsis; }.connection-item small { color:var(--wire);font:500 7px "Chakra Petch"; }.connection-item em { color:#809899;font-size:7px;line-height:1.45;font-style:normal; }.connection-item button { border:0;background:transparent;color:#52696b;cursor:pointer;padding:4px; }.connection-item.passed{border-color:rgba(94,234,212,.35)}.connection-item.failed{border-color:rgba(255,93,102,.4)}
.lab-terminal { margin-top:auto;min-height:116px;border:1px solid var(--line);background:#030a10;padding:11px;color:#5a7d7e;font:400 8px/1.75 "Chakra Petch";overflow:auto; }.lab-terminal p{margin:0}.lab-terminal .ok{color:var(--cyan)}.lab-terminal .error{color:var(--red)}.test-network{margin-top:12px;width:100%;justify-content:space-between;font-size:10px}.test-network:disabled{filter:grayscale(1);opacity:.35;cursor:not-allowed}
.lab-result { margin-top:14px;padding:16px 18px;border:1px solid var(--line);background:rgba(8,21,31,.85);align-items:center;justify-content:space-between;gap:20px; }.lab-result:not([hidden]){display:flex}.lab-result>div{display:flex;align-items:center;gap:12px}.lab-result>div>span{width:38px;height:38px;display:grid;place-items:center;border:1px solid currentColor;font:700 18px "Chakra Petch"}.lab-result p{display:grid;gap:4px;margin:0}.lab-result b{font:600 10px "Chakra Petch";letter-spacing:.12em}.lab-result small{color:var(--muted);font-size:9px}.lab-result.pass{color:var(--cyan)}.lab-result.fail{color:var(--red)}
.config-panel { margin-top:14px;border:1px solid rgba(103,232,249,.25);background:linear-gradient(145deg,rgba(7,22,32,.96),rgba(3,11,18,.94));padding:clamp(18px,3vw,34px);position:relative; }.config-panel::before{content:"";position:absolute;left:-1px;top:-1px;width:24px;height:24px;border-left:2px solid #67e8f9;border-top:2px solid #67e8f9}.config-heading{display:flex;align-items:end;justify-content:space-between;padding-bottom:22px;border-bottom:1px solid var(--line)}.config-heading h2{margin:8px 0 0;font-size:clamp(24px,2.4vw,36px)}.config-target{display:grid;grid-template-columns:1fr auto;gap:2px 12px;align-items:center;text-align:right}.config-target small{color:var(--muted);font:500 7px "Chakra Petch";letter-spacing:.16em}.config-target b{font:600 12px "Chakra Petch";letter-spacing:.08em}.config-target i{grid-column:2;grid-row:1/3;width:8px;height:8px;background:#67e8f9;border-radius:50%;box-shadow:0 0 10px #67e8f9}.config-grid{display:grid;grid-template-columns:260px minmax(430px,1fr) 300px;gap:14px;padding-top:18px}.config-brief,.ios-editor,.config-output{border:1px solid var(--line);background:rgba(3,11,18,.8)}.config-brief{padding:17px}.config-brief>span{color:#67e8f9;font:600 7px "Chakra Petch";letter-spacing:.18em}.config-brief>p{font-size:11px;line-height:1.7;color:#b4c4c4}.config-brief ol{list-style:none;padding:0;margin:14px 0;display:grid;gap:7px}.config-brief li{color:#70898a;font-size:8px;line-height:1.5;padding-left:17px;position:relative}.config-brief li::before{content:"○";position:absolute;left:0;color:#536d6e}.config-brief li.pass{color:var(--cyan)}.config-brief li.pass::before{content:"✓";color:var(--cyan)}.config-brief li.missing{color:#fdba74}.config-brief li.missing::before{content:"!";color:#fdba74}.ios-editor{display:flex;flex-direction:column;min-height:310px}.editor-bar{height:42px;padding:0 14px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#07121b}.editor-bar span{color:#67e8f9;font:600 9px "Chakra Petch"}.editor-bar small{color:#486263;font:500 7px "Chakra Petch";letter-spacing:.16em}.ios-editor textarea{flex:1;resize:vertical;min-height:210px;border:0;outline:0;background:#02080d;color:#b9f7ec;padding:16px;font:400 12px/1.7 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;caret-color:#67e8f9}.ios-editor textarea::placeholder{color:#3e5b5d}.editor-actions{height:55px;padding:7px;display:flex;align-items:center;justify-content:flex-end;gap:8px;border-top:1px solid var(--line)}.editor-actions>button:first-child{border:0;background:transparent;color:var(--muted);font:500 8px "Chakra Petch";cursor:pointer;padding:10px}.config-output{padding:15px;min-height:310px;color:#5f8182;font:400 8px/1.85 "Chakra Petch";overflow:auto}.config-output p{margin:0;overflow-wrap:anywhere}.config-output .ok{color:var(--cyan)}.config-output .error{color:var(--red)}.config-output .warn{color:#fdba74}.config-panel.complete{border-color:rgba(94,234,212,.55);box-shadow:0 0 35px rgba(94,234,212,.06)}
footer { border-top: 1px solid var(--line); padding: 24px clamp(24px,7vw,110px); display: flex; justify-content: space-between; color: #4d686a; font: 500 8px "Chakra Petch"; letter-spacing: .2em; }
@keyframes blink { 50% { opacity: .25; } } @keyframes rotate { to { transform: rotate(360deg); } } @keyframes dash { to { stroke-dashoffset: -26; } }
@media (max-width: 1100px) { .hero { width: 55vw; }.network-stage { right:-12vw; opacity:.65 }.mission-grid { grid-template-columns: repeat(2,1fr); }.console-layout { grid-template-columns: .55fr 1.45fr; }.question-panel { padding: 38px; } }
@media (max-width: 1250px) and (min-width: 761px) { .wiring-workbench{grid-template-columns:180px minmax(440px,1fr) 215px}.cable-rack,.diagnostic-panel{padding:18px 12px}.network-device{width:126px}.lab-intro{align-items:start}.lab-steps{padding-top:18px} }
@media (max-width: 1250px) and (min-width: 761px) { .config-grid{grid-template-columns:220px minmax(340px,1fr) 240px}.config-panel{padding:22px}.config-output{padding:11px} }
@media (max-width: 760px) {
  .topbar { height: 68px; }.brand-copy { display:none }.player-stats { gap:16px }.player-stats > span:first-child { display:none }
  .hero { width:100%; padding:70px 24px 75px }.hero h1 { font-size:54px }.hero-actions{align-items:stretch;flex-direction:column;gap:10px}.hero-actions button{justify-content:space-between}.network-stage { position:relative; width:100%; height:380px; right:auto; top:auto; margin-top:-40px; overflow:hidden }.radar { width:340px;height:340px }.links { transform:scale(.65);transform-origin:top left;left:calc(50% - 195px);top:0 }.sat-a{left:10%;top:20%}.sat-b{right:8%;top:21%}.sat-c{right:15%;bottom:12%}.alert-card{left:6%;bottom:12%}.scroll-cue{display:none}
  .section-heading { display:block }.section-heading>p{text-align:left}.mission-grid{grid-template-columns:1fr}.mission-card{min-height:290px}
  .game-screen{padding:10px 12px 40px}.game-header{grid-template-columns:1fr 1fr}.mission-identity{grid-row:2;grid-column:1/3;margin-top:18px}.lesson-panel{min-height:0;margin-top:18px;padding:28px 20px}.lesson-header{display:block}.lesson-header h2{font-size:35px}.lesson-header p{font-size:13px}.study-badge{width:88px;height:88px;float:right;margin:-10px 0 10px 14px}.lesson-grid{grid-template-columns:1fr;margin-top:28px}.lesson-card{min-height:0;padding:18px}.lesson-card.memory p{font-size:17px}.lesson-footer{display:block}.lesson-footer .primary-button{margin-top:18px;width:100%;justify-content:space-between}.console-layout{display:block}.packet-console{display:none}.question-panel{padding:28px 20px;min-height:680px}.answer-list{grid-template-columns:1fr}.question-panel h2{font-size:24px;margin:28px 0 24px}.feedback-panel:not([hidden]){display:block}.feedback-panel .primary-button{margin-top:18px;width:100%;justify-content:space-between}.result-actions{flex-direction:column}.result-actions button{justify-content:center}.result-stats div{padding:12px 6px}.result-stats b{font-size:20px}
  .wiring-screen{padding:10px 10px 50px}.wiring-topline{grid-template-columns:1fr auto}.lab-mode-label{display:none}.lab-intro{display:block;padding:20px 2px}.lab-intro h1{font-size:31px}.lab-intro p{font-size:11px;line-height:1.6}.lab-steps{margin-top:18px;gap:5px;overflow-x:auto}.lab-steps i{width:10px}.lab-tab{min-width:155px}.wiring-workbench{display:flex;flex-direction:column}.cable-rack{border-right:0;border-bottom:1px solid var(--line);padding:16px 12px}.cable-list{grid-template-columns:1fr 1fr}.cable-choice{min-height:58px}.rack-hint{display:none}.topology-panel{order:2}.topology-toolbar{padding:0 10px}.topology-toolbar>span{font-size:7px}.topology-toolbar button{font-size:7px;margin-left:5px}.topology-canvas{min-height:550px}.network-device{width:112px;min-height:91px;padding:7px}.device-face{grid-template-columns:26px 1fr;gap:5px}.device-icon{width:26px;height:26px}.device-face b{font-size:7px}.port-button{padding:5px;font-size:6px}.diagnostic-panel{order:3;border-left:0;border-top:1px solid var(--line);min-height:370px}.connection-list{min-height:120px}.lab-result:not([hidden]){display:block}.lab-result .primary-button{width:100%;justify-content:space-between;margin-top:14px}.port-prompt{font-size:7px;max-width:90%;white-space:normal;text-align:center}.link-legend{justify-content:center;gap:10px}footer{display:block;line-height:2}
}
@media (max-width: 760px) { .config-panel{padding:18px 12px}.config-heading{display:block}.config-target{margin-top:16px;text-align:left;justify-content:start}.config-target i{grid-column:1;grid-row:1/3;margin-right:8px}.config-target small,.config-target b{grid-column:2}.config-grid{grid-template-columns:1fr}.config-brief{padding:14px}.ios-editor{min-height:350px}.ios-editor textarea{font-size:11px;min-height:250px}.config-output{min-height:190px}.config-heading h2{font-size:25px}.config-panel.complete{box-shadow:none} }
@media (prefers-reduced-motion: reduce) { *,*::before,*::after { animation-duration:.01ms!important; scroll-behavior:auto!important; transition-duration:.01ms!important; } }