/* ---------- tokens ---------- */
:root {
  --warm: #e8865f;
  --warm-deep: #c9633c;
  --warm-soft: rgba(232, 134, 95, .16);
  --cool: #5cc8b5;
  --cool-deep: #35a08d;
  --cool-soft: rgba(92, 200, 181, .16);
  --gold: #f2c14e;
  --ink: #eef0f5;
  --ink-2: #b6bcc9;
  --ink-3: #7d8494;
  --bg: #0f1117;
  --panel: #171a23;
  --panel-2: #1d2130;
  --line: #2a2f3d;
  --code-bg: #0a0c11;
  --code-fg: #e6edf3;
  --red: #ff6b6b;
  --green: #4ade80;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --shadow: 0 18px 40px -18px rgba(0, 0, 0, .7), 0 2px 8px -2px rgba(0, 0, 0, .5);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: "Space Grotesk", "Inter", system-ui, sans-serif; letter-spacing: -.02em; margin: 0; }
code, pre { font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
.hand { font-family: "Caveat", "Segoe Script", cursive; font-weight: 700; color: var(--ink-2); font-size: 30px; line-height: 1.05; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: inherit; }
.dim { color: var(--ink-3); font-weight: 500; }
p code, li code { background: var(--panel-2); border: 1px solid var(--line); padding: 2px 8px; border-radius: 6px; font-size: .85em; color: var(--cool); }

/* ---------- ambient background ---------- */
.bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .5; will-change: transform; transition: transform 1.2s var(--ease); }
.blob-warm { width: 65vmax; height: 65vmax; left: -25vmax; top: -30vmax; background: radial-gradient(circle, rgba(232,134,95,.45), rgba(232,134,95,0) 65%); animation: drift1 28s ease-in-out infinite alternate; }
.blob-cool { width: 70vmax; height: 70vmax; right: -30vmax; bottom: -35vmax; background: radial-gradient(circle, rgba(92,200,181,.38), rgba(92,200,181,0) 65%); animation: drift2 34s ease-in-out infinite alternate; }
@keyframes drift1 { from { transform: translate(0,0) scale(1); } to { transform: translate(12vmax, 8vmax) scale(1.15); } }
@keyframes drift2 { from { transform: translate(0,0) scale(1); } to { transform: translate(-10vmax, -12vmax) scale(1.1); } }
#glyphs { position: absolute; inset: 0; width: 100%; height: 100%; }
.cursor-glow {
  position: absolute; width: 560px; height: 560px; border-radius: 50%; left: 0; top: 0;
  background: radial-gradient(circle, rgba(255,255,255,.08), rgba(255,255,255,0) 60%);
  transform: translate(-50%, -50%); opacity: 0; transition: opacity .6s;
}
body.has-mouse .cursor-glow { opacity: 1; }

/* ---------- deck & slides ---------- */
.deck { position: fixed; left: 50%; top: 50%; width: 1600px; height: 900px; transform: translate(-50%, -50%); transform-origin: center; z-index: 1; }
.slide {
  position: absolute; inset: 0; padding: 70px 90px;
  opacity: 0; visibility: hidden; transform: translateX(80px);
  transition: opacity .55s var(--ease), transform .65s var(--ease), visibility 0s .6s;
  display: flex; flex-direction: column;
}
.slide.past { transform: translateX(-80px); }
.slide.active { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; z-index: 2; }

.rise { opacity: 0; transform: translateY(24px); }
.slide.active .rise { animation: rise .8s var(--ease) forwards; animation-delay: calc(var(--d, 0) * 1ms + .15s); }
@keyframes rise { to { opacity: 1; transform: none; } }

.frag { opacity: 0; transform: translateY(14px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.frag.on { opacity: 1; transform: none; }

/* highlight sweep */
.hl { position: relative; display: inline-block; z-index: 0; white-space: nowrap; }
.hl::before { content: ""; position: absolute; left: -.08em; right: -.08em; bottom: .05em; height: .38em; z-index: -1; transform: scaleX(0); transform-origin: left; border-radius: 4px; }
.hl-warm::before { background: var(--warm); opacity: .55; }
.hl-cool::before { background: var(--cool); opacity: .5; }
.slide.active .hl::before { animation: sweep .7s var(--ease) forwards; animation-delay: .45s; }
@keyframes sweep { to { transform: scaleX(1); } }

/* common type */
.eyebrow { font-size: 15px; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-3); font-weight: 600; margin: 0 0 14px; }
h1 { font-size: 104px; line-height: .98; font-weight: 700; }
h2 { font-size: 62px; line-height: 1.05; font-weight: 700; margin-bottom: 34px; }
h3 { font-size: 26px; font-weight: 700; }
.sub { font-size: 30px; color: var(--ink-2); margin: 28px 0 0; }
.sub em { font-style: normal; color: var(--ink); font-weight: 600; }
.lead { font-size: 24px; color: var(--ink-2); margin: -14px 0 30px; }
.takeaway { margin: auto 0 0; font-size: 26px; color: var(--ink-2); line-height: 1.35; padding-top: 24px; }
.takeaway em { font-style: normal; color: var(--ink); font-weight: 600; box-shadow: inset 0 -.35em 0 var(--warm-soft); }
.corner { position: absolute; right: 90px; bottom: 120px; margin: 0; transform: rotate(-2deg); }
.hint { margin-top: 40px; }
.prompt-mark { color: var(--warm); font-weight: 600; }
.center { text-align: center; }

/* buttons */
.btn { position: relative; overflow: hidden; display: inline-flex; align-items: center; gap: 8px; border: 0; border-radius: 999px; padding: 14px 26px; font-weight: 600; font-size: 18px; text-decoration: none; transition: transform .2s var(--ease), box-shadow .2s; box-shadow: var(--shadow); }
.btn:hover { transform: translateY(-2px); }
.btn-warm { background: var(--warm); color: #1a0f0a; }
.btn-ghost { background: transparent; color: var(--ink); border: 2px solid var(--line); box-shadow: none; }
.ripple { position: absolute; border-radius: 50%; background: rgba(255,255,255,.4); transform: scale(0); animation: ripple .7s ease-out forwards; pointer-events: none; }
@keyframes ripple { to { transform: scale(2.6); opacity: 0; } }

/* ---------- 1 · title ---------- */
.s-title { justify-content: center; }
.cursor-line { margin-top: 40px; font-family: "JetBrains Mono", monospace; font-size: 26px; color: var(--ink-2); background: var(--code-bg); border: 1px solid var(--line); border-radius: 14px; padding: 18px 26px; width: fit-content; min-width: 700px; }
.caret { display: inline-block; width: 12px; height: 28px; background: var(--warm); vertical-align: -5px; margin-left: 4px; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- 2 · route ---------- */
.steps { display: flex; gap: 20px; margin-top: 40px; }
.step { flex: 1; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 26px 22px; display: flex; flex-direction: column; gap: 14px; box-shadow: var(--shadow); }
.step b { font-family: "Space Grotesk", sans-serif; font-size: 44px; color: var(--warm); line-height: 1; }
.step span { font-size: 22px; font-weight: 600; line-height: 1.2; }
.step.frag { transform: translateY(30px) rotate(-2deg); }
.step.frag.on { transform: none; }
.step:nth-child(even) b { color: var(--cool); }

/* ---------- 3 · rule ---------- */
.s-rule { justify-content: center; }
.rule-lines { display: flex; flex-direction: column; gap: 30px; }
.rule-line { font-family: "Space Grotesk", sans-serif; font-size: 58px; font-weight: 500; line-height: 1.1; margin: 0; color: var(--ink-2); }
.rule-line b { color: var(--ink); font-weight: 700; }

/* ---------- 4 · job ---------- */
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.job-card { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 34px 30px; box-shadow: var(--shadow); }
.job-icon { font-size: 44px; margin-bottom: 14px; }
.job-card h3 { font-size: 34px; margin-bottom: 12px; }
.job-card p { font-size: 21px; line-height: 1.4; color: var(--ink-2); margin: 0; }
.job-card:nth-child(1) { border-top: 4px solid var(--warm); }
.job-card:nth-child(2) { border-top: 4px solid var(--gold); }
.job-card:nth-child(3) { border-top: 4px solid var(--cool); }

/* ---------- 5 · chat vs agent ---------- */
.agent-grid { display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: 24px; align-items: stretch; }
.compare-card { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 26px; box-shadow: var(--shadow); }
.compare-card.accent { border-color: var(--warm); background: linear-gradient(180deg, var(--warm-soft), transparent 60%), var(--panel); }
.compare-card h3 { font-size: 28px; margin-bottom: 14px; }
.compare-card ul { margin: 0; padding-left: 20px; font-size: 19px; line-height: 1.5; color: var(--ink-2); }
.terminal { background: var(--code-bg); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); display: flex; flex-direction: column; overflow: hidden; min-height: 400px; }
.term-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--panel-2); border-bottom: 1px solid var(--line); font-size: 14px; color: var(--ink-3); }
.term-bar span { width: 12px; height: 12px; border-radius: 50%; background: var(--line); }
.term-bar span:nth-child(1) { background: #ff5f57; } .term-bar span:nth-child(2) { background: #febc2e; } .term-bar span:nth-child(3) { background: #28c840; }
.term-bar b { margin-left: 10px; font-weight: 500; font-family: "JetBrains Mono", monospace; }
.term-body { flex: 1; padding: 18px 20px; font-family: "JetBrains Mono", monospace; font-size: 16px; line-height: 1.6; color: var(--code-fg); display: flex; flex-direction: column; gap: 2px; }
.term-body .term-prompt { color: var(--warm); }
.term-body .t-read { color: var(--ink-3); }
.term-body .t-write { color: var(--cool); }
.term-body .t-run { color: var(--gold); }
.term-body .t-err { color: var(--red); }
.term-body .t-ok { color: var(--green); }
.term-body .t-say { color: var(--ink); }
.term-run { align-self: center; margin: 0 0 18px; }

/* ---------- 6 · tools ---------- */
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.tool-card { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 30px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 10px; }
.tool-logo { width: 64px; height: 64px; border-radius: 16px; display: grid; place-items: center; font-family: "Space Grotesk", sans-serif; font-size: 34px; font-weight: 700; margin-bottom: 8px; }
.tool-logo.warm { background: var(--warm); color: #1a0f0a; }
.tool-logo.ink { background: var(--ink); color: var(--bg); }
.tool-logo.cool { background: var(--cool); color: #06201b; }
.tool-card h3 { font-size: 30px; }
.tool-by { font-size: 17px; color: var(--ink-3); margin: 0; }
.tool-by b { color: var(--ink); }
.tool-card code { display: block; background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; font-size: 15px; color: var(--code-fg); margin: 8px 0; }
.tool-card p:last-child { font-size: 18px; color: var(--ink-2); margin: 0; }

/* ---------- 7 · money ---------- */
.money-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; grid-template-rows: auto auto; gap: 20px; }
.money-card { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 26px; box-shadow: var(--shadow); }
.money-card.best { grid-row: 1 / 3; border-color: var(--cool); background: linear-gradient(180deg, var(--cool-soft), transparent 55%), var(--panel); display: flex; flex-direction: column; gap: 14px; }
.money-card.warn { grid-column: 2 / 4; border-color: var(--gold); }
.money-tag { align-self: flex-start; background: var(--cool); color: #06201b; font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; }
.money-card h3 { font-size: 26px; margin-bottom: 8px; }
.money-card p { font-size: 19px; line-height: 1.45; color: var(--ink-2); margin: 0; }
.money-card code { display: block; background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; font-size: 16px; color: var(--cool); margin-top: auto; }

/* ---------- 8 · prompt ---------- */
.prompt-wrap { position: relative; }
.switch { position: absolute; right: 0; top: -70px; display: flex; align-items: center; gap: 12px; cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; }
.track { width: 64px; height: 34px; border-radius: 999px; background: var(--line); position: relative; transition: background .3s; }
.knob { position: absolute; top: 4px; left: 4px; width: 26px; height: 26px; border-radius: 50%; background: var(--ink); transition: transform .3s var(--ease); }
.switch input:checked + .track { background: var(--cool); }
.switch input:checked + .track .knob { transform: translateX(30px); }
.switch-label { font-size: 16px; color: var(--ink-3); display: flex; gap: 10px; }
.switch-label b { transition: color .3s; }
.switch input:not(:checked) ~ .switch-label .lbl-bad { color: var(--warm); }
.switch input:checked ~ .switch-label .lbl-good { color: var(--cool); }
.prompt-panes { position: relative; min-height: 210px; }
.prompt-pane { position: absolute; inset: 0; margin: 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: 18px; padding: 26px 30px; font-size: 21px; line-height: 1.55; color: var(--code-fg); white-space: pre-wrap; transition: opacity .4s var(--ease), transform .4s var(--ease); }
.prompt-pane.bad { border-color: var(--warm); }
.prompt-pane.good { border-color: var(--cool); opacity: 0; transform: translateY(12px); }
.s-prompt.good-on .prompt-pane.bad { opacity: 0; transform: translateY(-12px); }
.s-prompt.good-on .prompt-pane.good { opacity: 1; transform: none; }
.prompt-tips { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 40px; margin-top: 34px; }
.prompt-tips p { margin: 0; font-size: 22px; line-height: 1.4; color: var(--ink-2); }
.prompt-tips b { color: var(--ink); }
.prompt-block { margin: 30px 0 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: 16px; padding: 22px 26px; font-size: 19px; line-height: 1.5; color: var(--code-fg); white-space: pre-wrap; }

/* ---------- 9 · project flow ---------- */
.flow { display: grid; grid-template-columns: 300px 130px 300px 130px 300px; align-items: center; justify-content: center; gap: 0; margin-top: 10px; }
.flow-node { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 26px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 6px; text-align: center; align-items: center; }
.flow-node b { font-family: "Space Grotesk", sans-serif; font-size: 24px; }
.flow-node span { font-size: 16px; color: var(--ink-3); }
.flow-icon { font-size: 44px; margin-bottom: 6px; }
.flow-node.design { border-color: var(--gold); }
.flow-node.teach { border-color: var(--ink-2); }
.flow-builds { display: flex; flex-direction: column; gap: 30px; }
.flow-node.build.a { border-color: var(--warm); background: linear-gradient(180deg, var(--warm-soft), transparent), var(--panel); }
.flow-node.build.b { border-color: var(--cool); background: linear-gradient(180deg, var(--cool-soft), transparent), var(--panel); }
.flow-arrows svg { width: 130px; height: 200px; overflow: visible; }
.arrow-path { fill: none; stroke-width: 4; stroke-linecap: round; stroke-dasharray: 400; stroke-dashoffset: 400; }
.arrow-path.a { stroke: var(--warm); } .arrow-path.b { stroke: var(--cool); } .arrow-path.c { stroke: var(--ink-3); }
.slide.active .arrow-path { animation: draw 1.2s var(--ease) forwards; animation-delay: .8s; }
.slide.active .flow-arrows.single .arrow-path { animation-delay: 1.3s; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.guide-stats { display: flex; gap: 20px; margin-top: auto; }
.stat { flex: 1; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 18px 22px; display: flex; align-items: baseline; gap: 14px; }
.stat b { font-family: "Space Grotesk", sans-serif; font-size: 40px; color: var(--warm); }
.stat span { font-size: 18px; color: var(--ink-2); }
.stat.big { flex-direction: column; gap: 6px; padding: 28px; }
.stat.big b { font-size: 64px; }
.stat.big span { font-size: 20px; line-height: 1.4; }

/* ---------- 10 · frameworks ---------- */
.fw-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; perspective: 1400px; }
.flip { height: 250px; cursor: pointer; }
.flip-inner { position: relative; width: 100%; height: 100%; transition: transform .7s var(--ease); transform-style: preserve-3d; }
.flip:hover .flip-inner, .flip.flipped .flip-inner { transform: rotateY(180deg); }
.flip-face { position: absolute; inset: 0; backface-visibility: hidden; border-radius: 22px; background: var(--panel); border: 1px solid var(--line); box-shadow: var(--shadow); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; padding: 22px; }
.flip-face.back { transform: rotateY(180deg); background: var(--panel-2); border-color: var(--ink-3); }
.flip-face.back p { margin: 0; font-size: 17px; line-height: 1.45; color: var(--ink-2); text-align: center; }
.flip-face.back code { background: var(--code-bg); padding: 1px 6px; border-radius: 5px; color: var(--cool); font-size: .9em; }
.flip-face b { font-family: "Space Grotesk", sans-serif; font-size: 24px; }
.fw-logo { width: 74px; height: 74px; border-radius: 20px; display: grid; place-items: center; font-family: "Space Grotesk", sans-serif; font-size: 38px; font-weight: 700; }
.fw-logo.tw { background: #38bdf8; color: #06202b; }
.fw-logo.sass { background: #cf649a; color: #2b0b1c; }
.fw-logo.bs { background: #7952b3; color: #fff; }
.fw-logo.sh { background: #fafafa; color: #09090b; }
.fw-logo.other { background: var(--line); color: var(--ink); }

/* ---------- 11 · build ---------- */
.build-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 30px; align-items: start; }
.build-steps { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 30px 36px; box-shadow: var(--shadow); }
.build-steps ol { margin: 0; padding-left: 30px; font-size: 24px; line-height: 1.5; color: var(--ink-2); display: flex; flex-direction: column; gap: 12px; }
.build-steps li::marker { color: var(--cool); font-weight: 700; font-family: "Space Grotesk", sans-serif; }
.build-rule { background: linear-gradient(180deg, var(--warm-soft), transparent 70%), var(--panel); border: 1px solid var(--warm); border-radius: 22px; padding: 30px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 14px; }
.rule-badge { align-self: flex-start; background: var(--warm); color: #1a0f0a; font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; padding: 6px 12px; border-radius: 999px; }
.rule-big { font-family: "Space Grotesk", sans-serif; font-size: 40px; line-height: 1.1; margin: 0; }
.rule-big em { font-style: normal; color: var(--warm); }
.build-rule p { margin: 0; font-size: 20px; line-height: 1.45; color: var(--ink-2); }

/* ---------- 12 · look ---------- */
.look-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 30px; align-items: start; }
.browser { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column; }
.browser-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--panel-2); border-bottom: 1px solid var(--line); font-size: 14px; color: var(--ink-3); }
.browser-bar span { width: 12px; height: 12px; border-radius: 50%; background: var(--line); }
.browser-bar i { margin-left: 12px; font-style: normal; font-family: "JetBrains Mono", monospace; }
.browser-bar b { color: var(--ink); font-weight: 500; }
.browser-bar em { font-style: normal; background: var(--cool); color: #06201b; padding: 1px 8px; border-radius: 6px; font-weight: 700; margin-left: 6px; }
.viewport-wrap { background: #0b0d13; padding: 20px; display: flex; justify-content: center; min-height: 380px; }
.viewport { width: 100%; max-width: 100%; background: #fff7f0; color: #2a1d17; border-radius: 10px; padding: 16px; display: flex; flex-direction: column; gap: 14px; transition: width .25s var(--ease); font-size: 14px; }
.vp-nav { display: flex; gap: 14px; align-items: center; font-size: 13px; }
.vp-nav b { margin-right: auto; font-size: 15px; }
.vp-hero { background: #e8865f; color: #1a0f0a; border-radius: 8px; padding: 26px 18px; font-family: "Space Grotesk", sans-serif; font-size: 20px; }
.vp-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; transition: grid-template-columns .25s; }
.vp-cards div { height: 90px; background: #5cc8b5; border-radius: 8px; }
.viewport.narrow .vp-cards { grid-template-columns: 1fr; }
.viewport.narrow .vp-cards div { height: 40px; }
.viewport.narrow .vp-nav span { display: none; }
.browser input[type=range] { margin: 16px 20px 20px; accent-color: var(--warm); }
.code-pair { display: flex; flex-direction: column; gap: 16px; }
.code-card { background: var(--code-bg); border: 1px solid var(--line); border-radius: 16px; padding: 16px 20px; }
.code-card.a { border-left: 4px solid var(--warm); } .code-card.b { border-left: 4px solid var(--cool); }
.code-card b { display: block; font-size: 14px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px; }
.code-card pre { margin: 0; font-size: 17px; line-height: 1.5; color: var(--code-fg); white-space: pre-wrap; }
.code-card mark { background: transparent; color: inherit; border-radius: 5px; padding: 1px 4px; transition: background .3s, color .3s; }
.code-card mark.lit { background: var(--gold); color: #1a1200; }
.look-note { margin: 18px 0 0; font-size: 21px; line-height: 1.4; color: var(--ink-2); }
.look-note em { font-style: normal; color: var(--ink); font-weight: 600; }
.look-note b { color: var(--ink); }

/* ---------- 13 · explore ---------- */
.explore-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.q { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 24px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 12px; }
.q.required { border-color: var(--warm); background: linear-gradient(180deg, var(--warm-soft), transparent 60%), var(--panel); }
.q-tag { align-self: flex-start; font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; padding: 5px 10px; border-radius: 999px; background: var(--line); color: var(--ink-2); }
.q.required .q-tag { background: var(--warm); color: #1a0f0a; }
.q p { margin: 0; font-size: 20px; line-height: 1.45; color: var(--ink-2); }
.q p b { color: var(--ink); }

/* ---------- 14 · teach ---------- */
.teach-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: start; }
.site-mock { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); overflow: hidden; }
.site-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--panel-2); border-bottom: 1px solid var(--line); font-size: 14px; color: var(--ink-3); }
.site-bar span { width: 12px; height: 12px; border-radius: 50%; background: var(--line); }
.site-bar i { margin-left: 12px; font-style: normal; }
.site-body { padding: 26px 30px; background: #fbfaf4; color: #14181f; display: flex; flex-direction: column; gap: 14px; }
.site-body h4 { font-size: 26px; }
.site-links { display: flex; gap: 12px; }
.site-links a { font-size: 14px; font-weight: 600; padding: 6px 12px; border-radius: 999px; background: #e6e4da; text-decoration: none; }
.site-links a.a { background: var(--warm); color: #1a0f0a; } .site-links a.b { background: var(--cool); color: #06201b; }
.site-section { border-top: 1px solid #e6e4da; padding-top: 10px; }
.site-section b { display: block; font-size: 17px; }
.site-section p { margin: 2px 0 0; font-size: 14px; color: #6b7280; }
.teach-copy p { margin: 0 0 22px; font-size: 23px; line-height: 1.45; color: var(--ink-2); }
.teach-copy b { color: var(--ink); }
.teach-copy em { font-style: normal; color: var(--cool); font-weight: 700; }

/* ---------- 15 · hand-in ---------- */
.handin-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: start; }
.checklist { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 16px; }
.checklist li { display: flex; gap: 18px; align-items: flex-start; background: var(--panel); border: 1px solid var(--line); border-radius: 18px; padding: 20px 24px; box-shadow: var(--shadow); }
.check { width: 40px; height: 40px; border-radius: 50%; background: var(--cool); color: #06201b; display: grid; place-items: center; font-weight: 700; font-size: 22px; flex-shrink: 0; }
.checklist b { display: block; font-size: 24px; font-family: "Space Grotesk", sans-serif; }
.checklist span:not(.check) { font-size: 18px; color: var(--ink-2); line-height: 1.4; }
.handin-side { display: flex; flex-direction: column; gap: 20px; }

/* ---------- 16 · setup ---------- */
.setup-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.setup-step { background: var(--panel); border: 1px solid var(--line); border-radius: 22px; padding: 28px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 10px; }
.setup-step > b { font-family: "Space Grotesk", sans-serif; font-size: 40px; color: var(--warm); line-height: 1; }
.setup-step h3 { font-size: 28px; }
.setup-step p { margin: 0; font-size: 20px; line-height: 1.45; color: var(--ink-2); }
.setup-step pre { margin: 6px 0 0; background: var(--code-bg); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; font-size: 16px; line-height: 1.6; color: var(--code-fg); }

/* ---------- 17 · end ---------- */
.s-end { justify-content: center; }
.end-cta { display: flex; gap: 16px; margin-top: 44px; }

/* ---------- chrome ---------- */
.progress { position: fixed; left: 0; right: 0; bottom: 0; height: 6px; background: rgba(255,255,255,.06); z-index: 5; }
.progress-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--warm), var(--cool)); transition: width .5s var(--ease); }
.nav { position: fixed; right: 22px; bottom: 22px; z-index: 5; display: flex; align-items: center; gap: 8px; background: rgba(23,26,35,.85); border: 1px solid var(--line); backdrop-filter: blur(10px); padding: 8px 10px; border-radius: 999px; box-shadow: var(--shadow); }
.nav-btn { width: 40px; height: 40px; border-radius: 50%; border: 0; background: transparent; font-size: 20px; transition: background .2s, transform .2s var(--ease); }
.nav-btn:hover { background: var(--warm); color: #1a0f0a; transform: scale(1.08); }
.counter { font-size: 14px; font-weight: 600; color: var(--ink-3); min-width: 56px; text-align: center; font-variant-numeric: tabular-nums; }
.notes { position: fixed; left: 22px; bottom: 22px; z-index: 5; width: 460px; max-width: calc(100vw - 44px); background: rgba(10,12,17,.94); color: #fff; padding: 16px 20px; border: 1px solid var(--line); border-radius: 14px; font-size: 15px; line-height: 1.45; transform: translateY(20px); opacity: 0; visibility: hidden; transition: all .3s var(--ease); backdrop-filter: blur(10px); }
.notes.show { transform: none; opacity: 1; visibility: visible; }
.notes b { display: block; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--warm); margin-bottom: 6px; }
.notes p { margin: 0; }
.help { position: fixed; inset: 0; z-index: 6; background: rgba(0,0,0,.6); display: grid; place-items: center; opacity: 0; visibility: hidden; transition: all .3s; backdrop-filter: blur(4px); }
.help.show { opacity: 1; visibility: visible; }
.help-card { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 28px 34px; min-width: 360px; box-shadow: var(--shadow); }
.help-card h3 { margin-bottom: 14px; }
.help-card dl { display: grid; grid-template-columns: auto 1fr; gap: 8px 20px; margin: 0; font-size: 16px; }
.help-card dt { font-family: "JetBrains Mono", monospace; color: var(--warm); }
.help-card dd { margin: 0; color: var(--ink-2); }
#confetti { position: fixed; inset: 0; z-index: 4; pointer-events: none; }

html.static *, html.static *::before, html.static *::after { animation-duration: .01ms !important; animation-delay: 0s !important; transition-duration: .01ms !important; transition-delay: 0s !important; }
@media (prefers-reduced-motion: reduce) { .blob { animation: none; } .caret { animation: none; } }