:root {
  --ink: #f3f5fb;
  --muted: #9da7bb;
  --night: #070910;
  --panel: #0e111c;
  --panel-2: #131725;
  --line: rgba(255, 255, 255, 0.11);
  --cyan: #35e9dc;
  --pink: #ff4ca3;
  --yellow: #f6cb45;
  --green: #63e6a6;
  --danger: #ff6f6f;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
  --radius: 20px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--night);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  min-width: 300px;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(circle at 15% 10%, rgba(53, 233, 220, 0.1), transparent 30rem),
    radial-gradient(circle at 85% 20%, rgba(255, 76, 163, 0.09), transparent 26rem),
    linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: auto, auto, 42px 42px, 42px 42px;
}
a { color: inherit; }
button, input { font: inherit; }
code, pre { font-family: var(--mono); }
code { color: var(--cyan); }
pre {
  margin: 0;
  padding: 22px;
  background: #070a11;
  border: 1px solid rgba(53, 233, 220, 0.16);
  border-radius: 14px;
  color: #dfe6f2;
  font-size: .88rem;
  line-height: 1.62;
  overflow-x: auto;
  white-space: pre;
}
pre code { color: inherit; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.1; letter-spacing: -.03em; }
h1 { font-size: clamp(3rem, 8vw, 7rem); margin-bottom: 24px; }
h1 em { color: var(--cyan); font-style: normal; }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: 1.12rem; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 99; padding: 10px 16px; background: var(--cyan); color: #00110f; font-weight: 800; }
.skip-link:focus { top: 12px; }
.topbar {
  width: min(1440px, calc(100% - 48px));
  margin: 0 auto;
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  gap: 24px;
}
.sticky-topbar { position: sticky; top: 0; z-index: 20; width: 100%; padding: 0 max(24px, calc((100vw - 1440px)/2)); background: rgba(7, 9, 16, .9); backdrop-filter: blur(18px); }
.brand { display: inline-flex; gap: 12px; align-items: center; text-decoration: none; line-height: 1.05; }
.brand-mark { display: grid; place-items: center; width: 42px; aspect-ratio: 1; border: 1px solid var(--cyan); color: var(--cyan); font: 800 .86rem var(--mono); clip-path: polygon(12% 0, 100% 0, 100% 88%, 88% 100%, 0 100%, 0 12%); }
.brand strong { display: block; letter-spacing: .12em; font-size: .9rem; }
.brand small { display: block; color: var(--muted); font-size: .72rem; margin-top: 5px; letter-spacing: .04em; }
.season-chip, .tag, .readiness { font: 700 .68rem var(--mono); text-transform: uppercase; letter-spacing: .12em; }
.season-chip { color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; }
.topnav { display: flex; align-items: center; gap: 24px; font-size: .82rem; color: var(--muted); }
.topnav a { text-decoration: none; }
.topnav a:hover { color: var(--cyan); }
.small-button { border: 1px solid var(--line); background: transparent; color: var(--muted); border-radius: 7px; padding: 7px 10px; cursor: pointer; }
.small-button:hover { color: var(--ink); border-color: var(--pink); }
.hero { width: min(1320px, calc(100% - 48px)); margin: 0 auto; min-height: 640px; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: clamp(40px, 8vw, 120px); padding: 80px 0; }
.eyebrow, .card-kicker { color: var(--cyan); font: 700 .72rem var(--mono); text-transform: uppercase; letter-spacing: .16em; }
.hero-lede { max-width: 670px; color: #bdc5d4; font-size: clamp(1.05rem, 2vw, 1.3rem); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 44px; }
.hero-stats span { color: var(--muted); font-size: .86rem; border-left: 1px solid var(--line); padding-left: 18px; }
.hero-stats strong { display: block; color: var(--ink); font: 700 1.4rem var(--mono); }
.terminal-card { border: 1px solid rgba(53, 233, 220, .25); border-radius: var(--radius); background: rgba(8, 12, 20, .94); overflow: hidden; box-shadow: 0 0 80px rgba(53, 233, 220, .08), var(--shadow); transform: rotate(1deg); }
.terminal-bar { height: 48px; display: flex; align-items: center; gap: 7px; padding: 0 16px; border-bottom: 1px solid var(--line); color: var(--muted); font: .72rem var(--mono); }
.terminal-bar i { width: 9px; height: 9px; border-radius: 50%; background: #ff5b5b; }
.terminal-bar i:nth-child(2) { background: var(--yellow); }
.terminal-bar i:nth-child(3) { background: var(--green); }
.terminal-bar span { margin-left: 8px; }
.terminal-card pre { min-height: 340px; padding: 42px 30px; border: 0; border-radius: 0; background: transparent; }
.term-muted { color: #768197; }.term-cyan { color: var(--cyan); }.term-pink { color: var(--pink); }
.portal-section { width: min(1320px, calc(100% - 48px)); margin: 0 auto; padding: 100px 0 120px; }
.section-heading { max-width: 720px; margin-bottom: 40px; }
.portal-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.portal-card { min-height: 500px; padding: clamp(28px, 5vw, 56px); display: flex; flex-direction: column; justify-content: space-between; border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); overflow: hidden; position: relative; }
.portal-card::after { content: ""; position: absolute; width: 260px; height: 260px; border-radius: 50%; right: -100px; top: -100px; background: var(--accent); filter: blur(70px); opacity: .12; }
.student-portal { --accent: var(--cyan); }.teacher-portal { --accent: var(--pink); }
.portal-number { align-self: flex-end; color: rgba(255,255,255,.08); font: 800 5rem var(--mono); }
.portal-card h3 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 18px; }
.portal-card p { color: var(--muted); max-width: 540px; }
.feature-list { list-style: none; padding: 0; margin: 24px 0 34px; }
.feature-list li { padding: 9px 0 9px 24px; border-bottom: 1px solid var(--line); position: relative; }
.feature-list li::before { content: "+"; position: absolute; left: 0; color: var(--accent); font-family: var(--mono); }
.button-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 14px; width: fit-content; min-height: 48px; padding: 0 20px; border-radius: 8px; font-weight: 800; font-size: .82rem; text-decoration: none; border: 1px solid transparent; }
.button-primary { background: var(--cyan); color: #00110f; }
.button-primary:hover { background: #7afff5; }
.button-ghost { border-color: var(--line); color: var(--ink); }
.button-ghost:hover { border-color: var(--pink); color: var(--pink); }
.security-note { margin-top: 20px; padding: 18px 22px; border-left: 3px solid var(--yellow); background: rgba(246, 203, 69, .06); color: var(--muted); font-size: .84rem; }
.security-note strong { color: var(--yellow); }
.site-footer { min-height: 100px; width: min(1440px, calc(100% - 48px)); margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 20px; border-top: 1px solid var(--line); color: var(--muted); font: .68rem var(--mono); letter-spacing: .1em; }
.site-footer a { text-decoration: none; color: var(--cyan); }

/* Student */
.student-hero { min-height: 560px; grid-template-columns: 1fr 410px; }
.progress-card { border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); padding: 34px; display: flex; align-items: center; gap: 24px; box-shadow: var(--shadow); }
.progress-card h2 { font-size: 1.5rem; margin-bottom: 8px; }
.progress-card p { color: var(--muted); margin-bottom: 0; font-size: .86rem; }
.progress-ring { --progress: 0; flex: 0 0 112px; width: 112px; aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; background: conic-gradient(var(--cyan) calc(var(--progress) * 1%), rgba(255,255,255,.08) 0); position: relative; }
.progress-ring::after { content: ""; position: absolute; width: 82px; aspect-ratio: 1; border-radius: 50%; background: var(--panel); }
.progress-ring span { z-index: 1; font: 800 1.1rem var(--mono); }
.mission-map { width: min(1320px, calc(100% - 48px)); margin: 0 auto; padding: 20px 0 80px; }
.compact-heading { margin-bottom: 24px; }
.week-strip { display: grid; grid-template-columns: repeat(7, 1fr); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.week-strip a { min-height: 122px; padding: 18px 14px; display: flex; flex-direction: column; justify-content: space-between; color: var(--muted); font-size: .76rem; text-decoration: none; border-right: 1px solid var(--line); background: rgba(255,255,255,.018); }
.week-strip a:last-child { border-right: 0; }
.week-strip a:hover { background: rgba(53,233,220,.07); color: var(--ink); }
.week-strip span { color: var(--cyan); font: 700 1rem var(--mono); }
.course-layout { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding-bottom: 120px; }
.course-intro { padding: 80px 0; border-top: 1px solid var(--line); }
.rules-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.rules-grid article { padding: 24px; border: 1px solid var(--line); background: rgba(255,255,255,.02); border-radius: 12px; }
.rules-grid strong { color: var(--pink); font: 800 1.2rem var(--mono); }
.rules-grid h3 { margin: 22px 0 8px; }
.rules-grid p { color: var(--muted); font-size: .86rem; margin-bottom: 0; }
.voice-pack { display: grid; grid-template-columns: 1.05fr 1.35fr .8fr; gap: 18px; align-items: center; margin-top: 18px; padding: 25px; border: 1px solid rgba(255,76,163,.24); border-radius: 14px; background: linear-gradient(120deg, rgba(255,76,163,.055), transparent); }
.voice-pack h3 { margin: 8px 0; }.voice-pack p { color: var(--muted); font-size: .83rem; margin-bottom: 0; }
.voice-examples { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.voice-examples span { padding: 10px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); font-size: .78rem; }
.voice-examples b { display: block; color: var(--pink); font: 700 .6rem var(--mono); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 4px; }
.code-voice { display: grid; gap: 5px; padding-left: 18px; border-left: 1px solid var(--line); }
.code-voice code { font-size: .72rem; }.code-voice em { color: var(--muted); font-size: .66rem; font-style: normal; margin-bottom: 7px; }
.week-card { margin: 36px 0; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); overflow: hidden; scroll-margin-top: 110px; box-shadow: 0 20px 60px rgba(0,0,0,.18); }
.week-card.is-complete { border-color: rgba(99,230,166,.42); }
.week-header { padding: 32px; display: grid; grid-template-columns: 90px 1fr auto; align-items: center; gap: 28px; border-bottom: 1px solid var(--line); background: linear-gradient(110deg, rgba(53,233,220,.04), transparent); }
.week-header h2 { margin-bottom: 8px; }
.week-header p { color: var(--muted); margin-bottom: 0; }
.week-id { border-right: 1px solid var(--line); }
.week-id span { display: block; color: var(--muted); font: .64rem var(--mono); letter-spacing: .15em; }
.week-id strong { color: var(--cyan); font: 800 2.6rem var(--mono); }
.complete-toggle { cursor: pointer; }
.complete-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.complete-toggle span { display: inline-flex; align-items: center; gap: 8px; padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font: 700 .68rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
.complete-toggle span::before { content: ""; width: 12px; height: 12px; border: 1px solid var(--muted); border-radius: 50%; }
.complete-toggle input:focus-visible + span { outline: 2px solid var(--cyan); outline-offset: 3px; }
.complete-toggle input:checked + span { color: var(--green); border-color: rgba(99,230,166,.4); }
.complete-toggle input:checked + span::before { border-color: var(--green); background: var(--green); box-shadow: inset 0 0 0 3px var(--panel); }
.week-body { padding: 32px; }
.briefing { padding: 22px 24px; margin-bottom: 26px; border-left: 3px solid var(--pink); background: rgba(255,76,163,.05); }
.briefing h3 { color: var(--pink); margin-bottom: 7px; }.briefing p { margin-bottom: 0; }
.lesson-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 22px; }
.lesson-grid > section { padding: 24px; border: 1px solid var(--line); border-radius: 14px; }
.lesson-grid ul { padding-left: 20px; color: #bdc5d4; }
.lesson-grid li { margin-bottom: 7px; }
.micro-demo { display: grid; gap: 8px; margin-top: 22px; }
.micro-demo code { display: block; padding: 10px; background: #070a11; border-radius: 6px; }
.index-demo { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: 22px; }
.index-demo span { text-align: center; padding: 8px; border: 1px solid var(--line); color: var(--muted); font: .72rem var(--mono); }
.index-demo b { color: var(--ink); }
.challenge-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 22px; }
.challenge, .solo, .hint { padding: 24px; border: 1px solid var(--line); border-radius: 14px; }
.challenge { background: rgba(53,233,220,.035); }.challenge .tag { color: var(--cyan); }
.solo { background: rgba(255,76,163,.035); }.solo .tag { color: var(--pink); }
.challenge h3, .solo h3 { margin: 12px 0 8px; }.challenge p, .solo p { color: var(--muted); margin-bottom: 0; }
.hint summary { cursor: pointer; font-weight: 800; color: var(--yellow); }
.hint p { color: var(--muted); margin: 14px 0 0; }
.checkpoint { display: flex; gap: 20px; align-items: baseline; margin-top: 22px; padding: 18px 22px; border: 1px solid rgba(99,230,166,.28); background: rgba(99,230,166,.045); border-radius: 10px; }
.checkpoint strong { color: var(--green); white-space: nowrap; font: 700 .7rem var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.checkpoint p { margin-bottom: 0; }
.test-table-wrap { overflow-x: auto; margin-top: 22px; }
table { width: 100%; border-collapse: collapse; font-size: .86rem; }
caption { text-align: left; padding-bottom: 12px; font-weight: 800; }
th, td { padding: 14px 16px; border: 1px solid var(--line); text-align: left; }
th { color: var(--cyan); background: rgba(53,233,220,.045); font: 700 .68rem var(--mono); text-transform: uppercase; letter-spacing: .08em; }
td { color: #bdc5d4; }
.finish-banner { margin-top: 80px; padding: clamp(34px, 8vw, 80px); text-align: center; border: 1px solid rgba(53,233,220,.3); border-radius: var(--radius); background: radial-gradient(circle at 50% 110%, rgba(53,233,220,.16), transparent 55%), var(--panel); }
.finish-banner p:not(.eyebrow) { color: var(--muted); max-width: 700px; margin: 0 auto 28px; }
.finish-banner .button { margin: 0 auto; }

/* Student teaching material */
.setup-card { margin: 30px 0 60px; border: 1px solid rgba(246,203,69,.28); border-radius: var(--radius); background: var(--panel); overflow: hidden; scroll-margin-top: 110px; box-shadow: var(--shadow); }
.setup-header { display: grid; grid-template-columns: 90px 1fr; align-items: center; gap: 28px; padding: 34px; border-bottom: 1px solid var(--line); background: linear-gradient(110deg, rgba(246,203,69,.07), transparent); }
.setup-header .week-id strong { color: var(--yellow); }
.setup-header h2 { margin-bottom: 8px; }.setup-header p { color: var(--muted); margin-bottom: 0; }
.setup-body { padding: 34px; }
.plain-language { max-width: 820px; }
.plain-language h3 { font-size: 1.65rem; }
.plain-language p { color: #c1c9d6; }
.install-warning { display: flex; gap: 18px; align-items: baseline; margin: 28px 0; padding: 18px 20px; border-left: 3px solid var(--yellow); background: rgba(246,203,69,.055); }
.install-warning strong { color: var(--yellow); white-space: nowrap; }.install-warning span { color: var(--muted); font-size: .88rem; }
.install-warning a { color: var(--ink); }
.os-grid { display: grid; gap: 10px; }
.os-grid details { border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.015); padding: 0 22px; }
.os-grid summary { cursor: pointer; padding: 20px 0; font-weight: 800; list-style: none; }
.os-grid summary::-webkit-details-marker { display: none; }
.os-grid summary::after { content: "+"; float: right; color: var(--yellow); font: 1.1rem var(--mono); }
.os-grid details[open] summary::after { content: "−"; }
.os-grid ol { color: #bdc5d4; padding: 0 0 8px 24px; }
.os-grid li { padding: 4px 0 8px 6px; }
.os-grid a { color: var(--cyan); }
.os-icon { display: inline-grid; place-items: center; width: 30px; height: 30px; margin-right: 10px; border: 1px solid rgba(246,203,69,.3); border-radius: 6px; color: var(--yellow); font-family: var(--mono); }
.source-note { color: var(--muted); font-size: .78rem; padding: 12px 15px; margin: 0 0 20px; background: rgba(255,255,255,.025); border-radius: 8px; }
.idle-lesson { display: grid; grid-template-columns: .8fr 1.2fr; gap: 28px; align-items: center; margin-top: 34px; padding: 30px; border: 1px solid var(--line); border-radius: 14px; }
.idle-lesson p { color: var(--muted); }
.window-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.window-compare > div { padding: 14px; border: 1px solid var(--line); background: #090c14; border-radius: 10px; }
.window-compare span { display: block; color: var(--cyan); font: 700 .68rem var(--mono); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 9px; }
.window-compare pre { padding: 14px; font-size: .75rem; min-height: 88px; }
.window-compare small { display: block; color: var(--muted); margin-top: 9px; }
.first-run { margin-top: 36px; }
.numbered-steps { list-style: none; padding: 0; counter-reset: setup-steps; display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.numbered-steps li { counter-increment: setup-steps; min-height: 180px; padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.018); }
.numbered-steps li::before { content: "0" counter(setup-steps); display: block; color: var(--yellow); font: 800 1.15rem var(--mono); margin-bottom: 26px; }
.numbered-steps strong { display: block; margin-bottom: 8px; }
.numbered-steps span { color: var(--muted); font-size: .8rem; }
.concept-lesson { margin-bottom: 26px; padding: 30px; border: 1px solid rgba(53,233,220,.2); border-radius: 16px; background: linear-gradient(135deg, rgba(53,233,220,.04), transparent 45%), #0a0e17; }
.concept-heading { max-width: 800px; margin-bottom: 24px; }
.concept-heading h3 { margin: 11px 0 10px; font-size: 1.55rem; }
.concept-heading p { color: #b8c1d0; margin-bottom: 0; }
.lesson-label { display: inline-block; padding: 5px 8px; border: 1px solid rgba(53,233,220,.28); border-radius: 5px; color: var(--cyan); font: 700 .63rem var(--mono); text-transform: uppercase; letter-spacing: .11em; }
.concept-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.concept-block { padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: rgba(255,255,255,.018); }
.concept-block h4 { margin: 0 0 14px; font-size: 1rem; }
.concept-block p { color: var(--muted); font-size: .84rem; margin: 14px 0 0; }
.concept-block pre { padding: 16px; font-size: .78rem; }
.anatomy { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; margin-top: 12px; }
.anatomy span { padding: 9px; color: var(--muted); font-size: .68rem; border-top: 1px solid rgba(53,233,220,.22); }
.anatomy b { display: block; color: var(--cyan); font-family: var(--mono); margin-bottom: 3px; }
.code-journey { padding-left: 22px; color: #bdc5d4; font-size: .82rem; }
.code-journey li { padding: 3px 0; }
.try-box { display: grid; grid-template-columns: 210px 1fr; gap: 24px; align-items: start; margin-top: 14px; padding: 22px; border: 1px solid rgba(246,203,69,.25); border-radius: 12px; background: rgba(246,203,69,.035); }
.try-box span { color: var(--yellow); font: 700 .65rem var(--mono); text-transform: uppercase; letter-spacing: .12em; }
.try-box h4 { margin: 8px 0 0; }.try-box ol { margin: 0; padding-left: 22px; color: #bdc5d4; font-size: .84rem; }.try-box li { padding: 3px 0; }
.remember { display: flex; gap: 18px; margin-top: 14px; padding: 16px 18px; border-left: 3px solid var(--pink); background: rgba(255,76,163,.045); }
.remember strong { color: var(--pink); }.remember p { margin: 0; color: var(--muted); font-size: .83rem; }
.compare-code { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 14px; }
.compare-code > div { display: grid; grid-template-columns: 1fr auto; gap: 4px 18px; align-items: center; padding: 17px; border: 1px solid var(--line); border-radius: 10px; }
.compare-code strong { color: var(--pink); font: 800 1.3rem var(--mono); }.compare-code small { grid-column: 1 / -1; color: var(--muted); }
.selection-map { display: grid; grid-template-columns: 160px 1fr 1fr; gap: 1px; margin-bottom: 14px; border-radius: 10px; overflow: hidden; background: var(--line); }
.selection-map > * { padding: 18px; background: var(--panel-2); }.selection-map code { display: grid; place-items: center; color: var(--yellow); }
.selection-map span { color: #bdc5d4; font-size: .8rem; }
.symbol-list { display: grid; gap: 6px; }
.symbol-list p { display: grid; grid-template-columns: minmax(80px, auto) 1fr; gap: 12px; align-items: start; margin: 0; padding: 9px 0; border-bottom: 1px solid var(--line); }
.symbol-list p:last-child { border-bottom: 0; }.symbol-list b { color: var(--cyan); }
.trace-strip, .index-line { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin: 14px 0; }
.trace-strip span, .index-line span { padding: 15px; text-align: center; color: var(--ink); font-family: var(--mono); border: 1px solid var(--line); border-radius: 8px; }
.trace-strip b, .index-line b { display: block; color: var(--cyan); font-size: .65rem; text-transform: uppercase; margin-bottom: 5px; }.trace-strip .stop { color: var(--muted); border-style: dashed; }
.focus-code { margin-bottom: 12px; text-align: center; }
.index-line { grid-template-columns: repeat(3, 1fr); }
.function-flow { display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; gap: 10px; align-items: center; margin-bottom: 14px; }
.function-flow > div:not(.flow-arrow) { padding: 14px; border: 1px solid var(--line); border-radius: 10px; }
.function-flow span { display: block; color: var(--cyan); font: 700 .64rem var(--mono); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 8px; }
.function-flow pre { padding: 13px; font-size: .72rem; min-height: 78px; }
.flow-arrow { color: var(--pink); font-size: 1.3rem; }
.validation-flow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 14px; }
.validation-flow span, .validation-flow i { padding: 12px 15px; border: 1px solid var(--line); border-radius: 8px; font-style: normal; font-size: .78rem; }
.validation-flow span { color: var(--ink); }.validation-flow i { color: var(--yellow); border-style: dashed; }

/* Teacher */
.teacher-page { --cyan: #ff6aa8; --pink: #35e9dc; }
.teacher-hero { width: min(1320px, calc(100% - 48px)); margin: 0 auto; padding: 90px 0 70px; display: grid; grid-template-columns: 1fr 420px; gap: 60px; align-items: end; }
.teacher-hero h1 { font-size: clamp(2.8rem, 6vw, 5.8rem); }
.security-panel { display: flex; gap: 18px; padding: 24px; border: 1px solid rgba(246,203,69,.25); background: rgba(246,203,69,.05); border-radius: 14px; }
.security-panel strong { color: var(--yellow); }.security-panel p { color: var(--muted); font-size: .82rem; margin: 7px 0 0; }
.security-icon { color: var(--yellow); font-size: 1.6rem; }
.teacher-shell { width: min(1320px, calc(100% - 48px)); margin: 0 auto; display: grid; grid-template-columns: 220px 1fr; gap: 54px; padding-bottom: 120px; }
.teacher-sidebar { align-self: start; position: sticky; top: 112px; display: grid; padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.teacher-sidebar a { padding: 8px 0; color: var(--muted); text-decoration: none; font-size: .76rem; border-bottom: 1px solid var(--line); }
.teacher-sidebar a:hover { color: var(--cyan); }
.teacher-content { min-width: 0; }
.teacher-section, .teacher-week { scroll-margin-top: 112px; }
.teacher-section { padding: 42px; border: 1px solid var(--line); background: var(--panel); border-radius: var(--radius); margin-bottom: 30px; }
.teacher-section > p:not(.eyebrow) { color: var(--muted); }
.timing-bar { display: flex; margin: 30px 0; min-height: 86px; overflow: hidden; border-radius: 10px; border: 1px solid var(--line); }
.timing-bar span { flex: var(--size); display: flex; min-width: 75px; flex-direction: column; justify-content: center; padding: 10px; border-right: 1px solid var(--line); color: var(--muted); font-size: .7rem; background: rgba(255,255,255,.018); }
.timing-bar span:nth-child(even) { background: rgba(255,106,168,.05); }
.timing-bar b { color: var(--ink); font: 800 .9rem var(--mono); }
.teacher-principles { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.teacher-principles article { padding: 20px; border: 1px solid var(--line); border-radius: 10px; }
.teacher-principles p { color: var(--muted); font-size: .84rem; margin: 0; }
.prompt-ladder { margin-top: 24px; padding: 24px; border-left: 3px solid var(--cyan); background: rgba(255,106,168,.045); }
.prompt-ladder ol { columns: 2; padding-left: 20px; color: #bdc5d4; }
.prompt-ladder li { margin-bottom: 7px; break-inside: avoid; }
.teacher-week { border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); margin: 30px 0; overflow: hidden; }
.teacher-week > header { display: grid; grid-template-columns: 70px 1fr auto; align-items: center; gap: 22px; padding: 28px; border-bottom: 1px solid var(--line); }
.teacher-week > header > span { color: var(--cyan); font: 800 2.3rem var(--mono); }
.teacher-week header h2, .teacher-week header p { margin-bottom: 0; }
.readiness { border: 1px solid; padding: 7px 10px; border-radius: 999px; }
.readiness.core { color: var(--green); border-color: rgba(99,230,166,.3); }.readiness.flex { color: var(--yellow); border-color: rgba(246,203,69,.3); }
.teacher-week-grid { display: grid; grid-template-columns: 1fr 1fr; }
.teacher-week-grid > section { padding: 26px 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.teacher-week-grid > section:nth-child(even) { border-right: 0; }
.teacher-week-grid > section.full { grid-column: 1 / -1; border-right: 0; border-bottom: 0; }
.teacher-week-grid h3 { color: var(--cyan); margin-top: 20px; }.teacher-week-grid h3:first-child { margin-top: 0; }
.teacher-week-grid p, .teacher-week-grid li { color: #b4bdcd; font-size: .87rem; }
.teacher-week-grid ol, .teacher-week-grid ul { padding-left: 20px; }
.success { padding: 14px; margin: 18px 0 0 !important; border-left: 3px solid var(--green); background: rgba(99,230,166,.04); }
.success strong { color: var(--green); }
.anchor-target { scroll-margin-top: 110px; }
.assessment-section { margin-top: 70px; }
.outcome-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 24px; }
.outcome-grid article { padding: 24px; border: 1px solid var(--line); border-radius: 12px; }
.outcome-grid span { color: var(--cyan); font: 700 .68rem var(--mono); text-transform: uppercase; letter-spacing: .1em; }
.outcome-grid h3 { margin: 14px 0 8px; }.outcome-grid p { color: var(--muted); margin: 0; font-size: .85rem; }

@media (max-width: 980px) {
  .hero, .student-hero, .teacher-hero { grid-template-columns: 1fr; min-height: auto; }
  .landing-hero { padding-top: 100px; }
  .portal-grid, .lesson-grid { grid-template-columns: 1fr; }
  .week-strip { grid-template-columns: repeat(4, 1fr); }
  .week-strip a:nth-child(4) { border-right: 0; }
  .week-strip a { border-bottom: 1px solid var(--line); }
  .rules-grid { grid-template-columns: 1fr 1fr; }
  .teacher-shell { grid-template-columns: 1fr; }
  .teacher-sidebar { display: none; }
  .teacher-hero { align-items: start; }
  .numbered-steps { grid-template-columns: repeat(3, 1fr); }
  .idle-lesson { grid-template-columns: 1fr; }
  .voice-pack { grid-template-columns: 1fr; }
  .code-voice { padding: 14px 0 0; border-left: 0; border-top: 1px solid var(--line); }
}

@media (max-width: 720px) {
  .topbar { width: calc(100% - 28px); min-height: 72px; }
  .sticky-topbar { width: 100%; padding: 0 14px; }
  .season-chip, .topnav a:not(:last-child), .topnav .small-button { display: none; }
  .hero, .portal-section, .mission-map, .course-layout, .teacher-hero, .teacher-shell, .site-footer { width: calc(100% - 28px); }
  .hero { padding: 60px 0; }
  h1 { font-size: 3rem; }
  .terminal-card pre { min-height: 270px; padding: 28px 20px; font-size: .72rem; }
  .portal-section { padding: 70px 0; }
  .portal-card { min-height: 450px; }
  .student-hero { gap: 36px; }
  .progress-card { padding: 24px; }
  .progress-ring { flex-basis: 90px; width: 90px; }
  .progress-ring::after { width: 66px; }
  .week-strip { grid-template-columns: 1fr 1fr; }
  .week-strip a, .week-strip a:nth-child(4) { border-right: 1px solid var(--line); }
  .week-strip a:nth-child(even) { border-right: 0; }
  .rules-grid, .teacher-principles, .teacher-week-grid, .outcome-grid { grid-template-columns: 1fr; }
  .voice-examples { grid-template-columns: 1fr; }
  .week-header { grid-template-columns: 62px 1fr; padding: 22px 18px; gap: 16px; }
  .complete-toggle { grid-column: 1 / -1; }
  .week-body { padding: 18px; }
  .setup-header { grid-template-columns: 62px 1fr; padding: 24px 18px; gap: 16px; }
  .setup-body { padding: 18px; }
  .install-warning { flex-direction: column; gap: 5px; }.install-warning strong { white-space: normal; }
  .window-compare, .concept-pair, .compare-code { grid-template-columns: 1fr; }
  .numbered-steps { grid-template-columns: 1fr; }
  .numbered-steps li { min-height: auto; }.numbered-steps li::before { margin-bottom: 14px; }
  .concept-lesson { padding: 20px 16px; }
  .try-box { grid-template-columns: 1fr; gap: 12px; }
  .anatomy { grid-template-columns: 1fr; }
  .selection-map { grid-template-columns: 1fr; }
  .trace-strip, .index-line { grid-template-columns: 1fr 1fr; }
  .function-flow { grid-template-columns: 1fr; }.flow-arrow { text-align: center; transform: rotate(90deg); }
  .remember { flex-direction: column; gap: 5px; }
  .checkpoint { align-items: flex-start; flex-direction: column; gap: 8px; }
  .teacher-hero { padding-top: 60px; gap: 28px; }
  .teacher-section { padding: 24px 18px; }
  .timing-bar { overflow-x: auto; }
  .prompt-ladder ol { columns: 1; }
  .teacher-week > header { grid-template-columns: 56px 1fr; padding: 22px 18px; }
  .teacher-week .readiness { grid-column: 1 / -1; width: fit-content; }
  .teacher-week-grid > section, .teacher-week-grid > section:nth-child(even) { border-right: 0; }
  .site-footer { padding: 28px 0; flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}