:root {
  color-scheme: light;
  --ink: #0a0f0b;
  --forest: #0d2b1d;
  --green: #15803d;
  --leaf: #46d97e;
  --mint: #8fe9ac;
  --paper: #f7f5ee;
  --paper-2: #ece7da;
  --white: #fff;
  --muted: #59645d;
  --line: #ded8c8;
  --amber: #f2b23e;
  --coral: #f2795b;
  --blue: #5ac8e8;
  --violet: #9b8cf0;
  --danger: #a33b2b;
  --shadow: 0 24px 64px rgba(13, 43, 29, .12);
  --radius: 24px;
  --mono: "Geist Mono", ui-monospace, monospace;
  --sans: "Schibsted Grotesk", system-ui, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: var(--green); }
img, svg { max-width: 100%; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
::selection { background: var(--leaf); color: var(--ink); }
.skip-link { position: fixed; z-index: 1000; left: 18px; top: -80px; padding: 12px 18px; border-radius: 12px; background: var(--white); color: var(--ink); box-shadow: var(--shadow); }
.skip-link:focus { top: 18px; }
.boot-state, .noscript-card { min-height: 100vh; display: grid; place-content: center; gap: 14px; text-align: center; }
.brand-mark { color: var(--leaf); font-size: 38px; }

.app-shell { min-height: 100vh; }
.topbar { position: sticky; z-index: 50; top: 0; min-height: 72px; padding: 10px clamp(18px, 4vw, 44px); display: flex; align-items: center; gap: 22px; background: rgba(8, 14, 10, .92); color: var(--paper); border-bottom: 1px solid rgba(247, 245, 238, .1); backdrop-filter: blur(18px); }
.brand { display: inline-flex; flex: none; align-items: center; gap: 10px; color: var(--paper); font-weight: 800; font-size: 20px; text-decoration: none; }
.brand-leaf { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 10px; background: rgba(70, 217, 126, .14); color: var(--leaf); }
.product-name { color: var(--mint); font-family: var(--mono); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; }
.topnav { display: flex; flex: 1; align-items: center; justify-content: center; gap: 4px; }
.nav-link { border: 0; border-radius: 999px; padding: 10px 13px; background: transparent; color: rgba(247, 245, 238, .68); cursor: pointer; font-family: var(--mono); font-size: 10px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.nav-link:hover, .nav-link[aria-current="page"] { background: rgba(247, 245, 238, .09); color: var(--white); }
.profile-button { display: inline-flex; flex: none; align-items: center; gap: 9px; border: 1px solid rgba(247, 245, 238, .18); border-radius: 999px; padding: 7px 12px 7px 7px; background: rgba(247, 245, 238, .06); color: var(--paper); cursor: pointer; }
.avatar { display: grid; width: 30px; height: 30px; place-items: center; border-radius: 50%; background: linear-gradient(145deg, var(--leaf), var(--blue)); color: var(--forest); font-weight: 900; }
.mobile-menu { display: none; border: 1px solid rgba(247, 245, 238, .18); border-radius: 12px; padding: 9px 11px; background: transparent; color: var(--white); cursor: pointer; }

.status-strip { display: flex; align-items: center; justify-content: center; gap: 9px; padding: 8px 18px; background: #e8f3e8; border-bottom: 1px solid #cfdfcf; color: #265b37; font-size: 12px; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.status-strip.device { background: #fff5d9; border-color: #ead7a3; color: #6c5313; }
.status-strip.device .status-dot { background: var(--amber); }

.page { min-height: calc(100vh - 72px); }
.wrap { width: min(1240px, calc(100% - clamp(34px, 8vw, 96px))); margin: 0 auto; }
.section { padding: clamp(70px, 9vw, 120px) 0; }
.section-tight { padding: clamp(42px, 6vw, 72px) 0; }
.eyebrow { margin-bottom: 18px; color: var(--green); font-family: var(--mono); font-size: 11px; font-weight: 600; letter-spacing: .17em; text-transform: uppercase; }
.display { margin: 0; font-size: clamp(46px, 7vw, 98px); font-weight: 820; letter-spacing: -.052em; line-height: .96; text-wrap: balance; }
.display em, .section-title em { color: var(--green); font-family: var(--serif); font-weight: 400; letter-spacing: -.015em; }
.section-title { margin: 0; font-size: clamp(34px, 4.6vw, 64px); font-weight: 800; letter-spacing: -.045em; line-height: 1; text-wrap: balance; }
.lede { max-width: 720px; margin: 28px 0 0; color: var(--muted); font-size: clamp(17px, 1.8vw, 21px); line-height: 1.65; }
.body-copy { color: var(--muted); line-height: 1.72; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }
.stack { display: grid; gap: 16px; }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.between { justify-content: space-between; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }

.hero { position: relative; overflow: hidden; min-height: 620px; padding: clamp(80px, 10vw, 138px) 0; background: radial-gradient(840px 500px at 10% 8%, rgba(70, 217, 126, .18), transparent 62%), radial-gradient(720px 500px at 94% 80%, rgba(90, 200, 232, .16), transparent 64%), #0a1410; color: var(--paper); }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: clamp(40px, 7vw, 96px); }
.hero .display em { background: linear-gradient(96deg, var(--leaf), var(--mint) 48%, var(--blue)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lede { color: rgba(247, 245, 238, .7); }
.live-pill { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 28px; border: 1px solid rgba(70, 217, 126, .32); border-radius: 999px; padding: 8px 15px; background: rgba(70, 217, 126, .1); color: var(--mint); font-family: var(--mono); font-size: 10px; letter-spacing: .13em; text-transform: uppercase; }
.live-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--leaf); animation: pulse 2s ease-in-out infinite; }
.hero-visual { position: relative; min-height: 430px; border: 1px solid rgba(247, 245, 238, .13); border-radius: 30px; background: linear-gradient(145deg, rgba(70, 217, 126, .15), rgba(90, 200, 232, .1)), repeating-linear-gradient(90deg, rgba(255,255,255,.03) 0 1px, transparent 1px 36px), repeating-linear-gradient(0deg, rgba(255,255,255,.03) 0 1px, transparent 1px 36px); box-shadow: 0 36px 100px rgba(0, 0, 0, .35); }
.continue-art img { width:100%; height:100%; object-fit:cover; display:block; }
.hero-orbit { position: absolute; inset: 12% 13%; border: 1px dashed rgba(143, 233, 172, .3); border-radius: 50%; animation: spin 20s linear infinite; }
.hero-core { position: absolute; left: 50%; top: 50%; display: grid; width: 132px; height: 132px; place-items: center; transform: translate(-50%, -50%); border-radius: 34px; background: linear-gradient(145deg, var(--leaf), var(--blue)); color: var(--forest); box-shadow: 0 20px 60px rgba(70, 217, 126, .22); font-size: 52px; }
.float-card { position: absolute; min-width: 180px; border: 1px solid rgba(247, 245, 238, .14); border-radius: 18px; padding: 15px 17px; background: rgba(10, 20, 16, .74); box-shadow: 0 20px 50px rgba(0,0,0,.28); backdrop-filter: blur(16px); }
.float-card strong { display: block; margin-top: 5px; font-size: 15px; }
.float-card small { color: var(--mint); font-family: var(--mono); font-size: 9px; letter-spacing: .12em; }
.float-card.one { left: -6%; bottom: 9%; }
.float-card.two { right: -5%; top: 7%; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 40px; color: rgba(247, 245, 238, .46); font-family: var(--mono); font-size: 10px; letter-spacing: .11em; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; border: 1px solid transparent; border-radius: 999px; padding: 13px 24px; font-weight: 740; text-decoration: none; cursor: pointer; transition: transform .18s, box-shadow .18s, background .18s; }
.button:hover { transform: translateY(-2px); }
.button.primary { background: linear-gradient(96deg, var(--leaf), #7ce8a6); color: #08120c; box-shadow: 0 10px 28px rgba(70, 217, 126, .22); }
.button.dark { background: var(--forest); color: var(--paper); }
.button.ghost { border-color: var(--line); background: transparent; color: var(--ink); }
.hero .button.ghost { border-color: rgba(247,245,238,.26); background: rgba(247,245,238,.05); color: var(--paper); }
.button.small { min-height: 38px; padding: 9px 16px; font-size: 13px; }
.button.danger { border-color: #d9a89f; background: #fff3f0; color: var(--danger); }
.button:disabled { cursor: not-allowed; opacity: .52; transform: none; }
.link-button { border: 0; padding: 0; background: transparent; color: var(--green); font-weight: 700; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }

.card { border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: 0 0 0 transparent; }
.card-pad { padding: clamp(24px, 3vw, 36px); }
.card:hover.hoverable { border-color: #c8c1ae; box-shadow: var(--shadow); transform: translateY(-4px); }
.card.hoverable { transition: transform .24s, box-shadow .24s, border-color .24s; }
.dark-card { border: 1px solid rgba(247,245,238,.13); border-radius: var(--radius); background: rgba(247,245,238,.055); color: var(--paper); }
.pathway-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.pathway-card { position: relative; overflow: hidden; min-height: 300px; padding: 28px; cursor: pointer; }
.pathway-card::after { content: ""; position: absolute; width: 180px; height: 180px; right: -60px; top: -60px; border-radius: 50%; background: var(--wash); filter: blur(4px); }
.pathway-icon { position: relative; z-index: 1; display: grid; width: 54px; height: 54px; place-items: center; border-radius: 17px; background: var(--wash); font-size: 27px; }
.pathway-card h3 { position: relative; z-index: 1; margin: 64px 0 9px; font-size: 24px; letter-spacing: -.025em; }
.pathway-card p { position: relative; z-index: 1; margin: 0; color: var(--muted); line-height: 1.58; }
.progress-row { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 12px; margin-top: 24px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 10px; letter-spacing: .08em; }
.progress-track { overflow: hidden; height: 8px; border-radius: 999px; background: var(--paper-2); }
.progress-fill { height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--green), var(--leaf)); }

.dashboard-head { padding: clamp(68px, 8vw, 108px) 0 38px; background: linear-gradient(180deg, #ecf2e9, var(--paper)); }
.dashboard-layout { display: grid; grid-template-columns: 1.45fr .55fr; gap: 18px; align-items: start; }
.continue-card { display: grid; grid-template-columns: 1fr 210px; overflow: hidden; background: var(--forest); color: var(--paper); }
.continue-card .card-pad { align-self: center; }
.continue-card p { color: rgba(247,245,238,.66); }
.continue-art { display: grid; min-height: 260px; place-items: center; background: radial-gradient(circle at 40% 35%, rgba(70,217,126,.45), transparent 38%), repeating-linear-gradient(45deg, rgba(255,255,255,.04) 0 2px, transparent 2px 14px); font-size: 64px; }
.metric-card { padding: 24px; }
.metric { font-size: 42px; font-weight: 830; letter-spacing: -.04em; }
.metric-label { color: var(--muted); font-family: var(--mono); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.recent-list { display: grid; gap: 10px; }
.recent-item { display: flex; align-items: center; gap: 13px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.recent-item:last-child { border-bottom: 0; }

.filter-bar { position: sticky; z-index: 12; top: 72px; padding: 16px 0; background: rgba(247,245,238,.94); backdrop-filter: blur(14px); }
.filters { display: grid; grid-template-columns: 1.4fr repeat(4, minmax(120px, .65fr)); gap: 10px; padding: 14px; border: 1px solid var(--line); border-radius: 20px; background: var(--white); }
.field { display: grid; gap: 7px; }
.field label { color: var(--muted); font-family: var(--mono); font-size: 10px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
.field input, .field select, .field textarea { width: 100%; border: 1px solid var(--line); border-radius: 13px; padding: 12px 13px; background: var(--paper); color: var(--ink); }
.field textarea { min-height: 120px; resize: vertical; }
.mission-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.mission-card { display: flex; flex-direction: column; overflow: hidden; min-height: 360px; }
.mission-wash { display: flex; position: relative; min-height: 130px; align-items: center; justify-content: center; background: var(--wash); font-size: 44px; }
.level-chip { position: absolute; left: 14px; top: 14px; border-radius: 999px; padding: 6px 11px; background: rgba(10,20,16,.72); color: var(--paper); font-family: var(--mono); font-size: 9px; letter-spacing: .09em; }
.mission-card .card-pad { display: flex; flex: 1; flex-direction: column; }
.mission-card h3 { margin: 0 0 8px; font-size: 21px; letter-spacing: -.02em; }
.mission-card p { margin: 0 0 18px; color: var(--muted); font-size: 14px; line-height: 1.55; }
.mission-meta { display: flex; flex-wrap: wrap; gap: 8px 14px; margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: .07em; }
.tag { display: inline-flex; border-radius: 999px; padding: 6px 10px; background: rgba(31,122,63,.08); color: var(--green); font-family: var(--mono); font-size: 9px; letter-spacing: .07em; }
.empty-state { padding: 56px 30px; text-align: center; }

.mission-shell { min-height: 100vh; background: #f4f2e9; }
.mission-header { padding: 42px 0 32px; background: var(--forest); color: var(--paper); }
.mission-header p { color: rgba(247,245,238,.68); }
.mission-header .eyebrow { color: var(--mint); }
.mission-header .tag { border-color: rgba(143,233,172,.34); background: rgba(143,233,172,.1); color: #dff7e6; }
.mission-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr) 310px; gap: 18px; align-items: start; padding: 24px 0 70px; }
.step-nav, .guide-panel { position: sticky; top: 96px; max-height: calc(100vh - 120px); overflow: auto; }
.step-nav { padding: 16px; }
.step-button { display: grid; width: 100%; grid-template-columns: 30px 1fr; gap: 10px; align-items: start; border: 0; border-radius: 14px; padding: 11px; background: transparent; color: var(--muted); text-align: left; cursor: pointer; }
.step-button:hover, .step-button.active { background: var(--paper-2); color: var(--ink); }
.step-number { display: grid; width: 26px; height: 26px; place-items: center; border: 1px solid var(--line); border-radius: 9px; background: var(--white); font-family: var(--mono); font-size: 10px; }
.step-button.done .step-number { border-color: var(--green); background: var(--green); color: var(--white); }
.step-button strong { display: block; font-size: 13px; line-height: 1.3; }
.step-button small { color: var(--muted); font-family: var(--mono); font-size: 9px; }
.mission-main { min-width: 0; }
.step-card { padding: clamp(26px, 4vw, 48px); }
.step-kicker { color: var(--green); font-family: var(--mono); font-size: 10px; letter-spacing: .12em; text-transform: uppercase; }
.step-card h2 { margin: 12px 0 18px; font-size: clamp(30px, 4vw, 48px); letter-spacing: -.04em; line-height: 1; }
.step-card h3 { margin: 30px 0 10px; }
.instruction { color: #33423a; font-size: 17px; line-height: 1.72; white-space: pre-line; }
.build-task { margin: 24px 0; border-left: 4px solid var(--leaf); border-radius: 0 16px 16px 0; padding: 20px 22px; background: #eef9f0; }
.explain-box { margin-top: 24px; border-radius: 18px; padding: 22px; background: var(--forest); color: var(--paper); }
.explain-box p { margin-bottom: 0; color: rgba(247,245,238,.72); line-height: 1.65; }
.checkpoint { margin-top: 26px; border: 1px solid #c9d8c8; border-radius: 18px; padding: 22px; background: #f2f8f1; }
.choice-list { display: grid; gap: 8px; margin-top: 14px; }
.choice { border: 1px solid var(--line); border-radius: 13px; padding: 12px 14px; background: var(--white); text-align: left; cursor: pointer; }
.choice:hover { border-color: var(--green); }
.choice.correct { border-color: var(--green); background: #e7f7eb; }
.choice.wrong { border-color: var(--coral); background: #fff0ec; }
.feedback { margin-top: 12px; font-size: 14px; font-weight: 650; }
.mission-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 28px; }
.mission-intro { margin: -4px 0 28px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.save-state { color: var(--muted); font-family: var(--mono); font-size: 9px; letter-spacing: .08em; }

.guide-panel { overflow: hidden; }
.guide-head { padding: 20px; background: linear-gradient(145deg, var(--forest), #123e2a); color: var(--paper); }
.guide-head small { color: var(--mint); font-family: var(--mono); letter-spacing: .1em; }
.guide-body { display: grid; gap: 12px; padding: 18px; }
.hint { border: 1px solid var(--line); border-radius: 14px; padding: 14px; background: var(--paper); }
.hint summary { cursor: pointer; font-weight: 700; }
.hint p { margin: 10px 0 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
.guide-message { border-radius: 14px; padding: 14px; background: var(--paper-2); color: #33423a; font-size: 13px; line-height: 1.55; }

.code-lab { margin: 26px 0; overflow: hidden; border: 1px solid #28372f; border-radius: 20px; background: #101914; box-shadow: 0 24px 60px rgba(0,0,0,.17); }
.code-tabs { display: flex; gap: 2px; padding: 9px; background: #0a100c; }
.code-tab { border: 0; border-radius: 9px; padding: 8px 12px; background: transparent; color: #91a298; cursor: pointer; font-family: var(--mono); font-size: 10px; }
.code-tab.active { background: #213229; color: var(--mint); }
.code-editor { width: 100%; min-height: 280px; border: 0; padding: 18px; background: #101914; color: #d8eadc; font: 13px/1.6 var(--mono); resize: vertical; tab-size: 2; }
.code-toolbar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 12px; border-top: 1px solid #28372f; color: #91a298; font: 10px var(--mono); }
.preview-frame { width: 100%; min-height: 320px; border: 0; background: var(--white); }
.console { max-height: 140px; overflow: auto; padding: 12px 16px; border-top: 1px solid #28372f; background: #09100c; color: #b8c9be; white-space: pre-wrap; font: 11px/1.5 var(--mono); }
.playground-tabs { display: none; }

.data-lab { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.sample-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.sample { display: grid; aspect-ratio: 1; place-items: center; border: 1px solid var(--line); border-radius: 13px; background: var(--white); font-size: 24px; cursor: pointer; }
.sample.selected { border-color: var(--violet); box-shadow: 0 0 0 2px rgba(155,140,240,.2); }
.prediction { display: grid; min-height: 170px; place-items: center; border-radius: 18px; background: linear-gradient(145deg, rgba(155,140,240,.18), rgba(90,200,232,.13)); text-align: center; }
.bar-chart { display: grid; gap: 10px; }
.bar { display: grid; grid-template-columns: 100px 1fr 42px; gap: 10px; align-items: center; font-size: 12px; }
.bar-track { height: 10px; border-radius: 999px; background: var(--paper-2); }
.bar-fill { height: 100%; border-radius: inherit; background: var(--violet); }

.project-card, .achievement-card, .hall-card { padding: 24px; }
.achievement-card.locked { filter: grayscale(1); opacity: .48; }
.badge-icon { display: grid; width: 54px; height: 54px; place-items: center; border-radius: 17px; background: var(--paper-2); font-size: 28px; }
.hall-card { display: grid; gap: 16px; }
.hall-media { display: grid; min-height: 180px; place-items: center; border-radius: 18px; background: linear-gradient(145deg, rgba(70,217,126,.2), rgba(90,200,232,.15)); font-size: 52px; }
.moderation-chip { width: fit-content; border-radius: 999px; padding: 6px 10px; background: var(--paper-2); font-family: var(--mono); font-size: 9px; letter-spacing: .08em; text-transform: uppercase; }
.moderation-chip.approved { background: #dff4e5; color: #1d6337; }
.moderation-chip.rejected { background: #ffe6e0; color: #8a2e21; }
.notice { border: 1px solid #ead7a3; border-radius: 16px; padding: 16px 18px; background: #fff7df; color: #5f4a14; line-height: 1.55; }
.error-notice { border-color: #dfb4ac; background: #fff0ed; color: #812f24; }
.success-notice { border: 1px solid #b8d8be; border-radius: 16px; padding: 16px 18px; background: #edf8ef; color: #225f35; line-height: 1.55; }
.toast-region { position: fixed; z-index: 100; right: 18px; bottom: 18px; display: grid; gap: 8px; width: min(360px, calc(100vw - 36px)); }
.toast { border: 1px solid var(--line); border-radius: 15px; padding: 14px 16px; background: var(--white); box-shadow: var(--shadow); }
.modal-backdrop { position: fixed; z-index: 90; inset: 0; display: grid; place-items: center; padding: 20px; background: rgba(4,10,6,.65); backdrop-filter: blur(8px); }
.modal { width: min(560px, 100%); max-height: calc(100vh - 40px); overflow: auto; border-radius: 26px; padding: clamp(26px, 4vw, 42px); background: var(--white); box-shadow: 0 32px 100px rgba(0,0,0,.35); }
.auth-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 24px; padding: 5px; border-radius: 13px; background: var(--paper-2); }
.auth-tab { border: 0; border-radius: 10px; padding: 10px; background: transparent; cursor: pointer; }
.auth-tab.active { background: var(--white); box-shadow: 0 4px 12px rgba(13,43,29,.08); }

.footer { padding: 48px 0; background: #08120c; color: rgba(247,245,238,.65); }
.footer a { color: var(--mint); }
.footer-grid { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px; }

@keyframes pulse { 0%, 100% { opacity: .5; transform: scale(.9); } 50% { opacity: 1; transform: scale(1.15); } }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 1050px) {
  .topnav { display: none; position: absolute; left: 18px; right: 18px; top: 64px; flex-direction: column; align-items: stretch; border: 1px solid rgba(247,245,238,.12); border-radius: 18px; padding: 10px; background: #0a1410; box-shadow: var(--shadow); }
  .topnav.open { display: flex; }
  .nav-link { text-align: left; }
  .mobile-menu { display: block; margin-left: auto; }
  .hero-grid, .dashboard-layout { grid-template-columns: 1fr; }
  .hero-visual { width: min(620px, 100%); margin: 0 auto; }
  .pathway-grid, .mission-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mission-layout { grid-template-columns: 220px minmax(0, 1fr); }
  .guide-panel { position: static; grid-column: 1 / -1; }
  .filters { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .filters .field:first-child { grid-column: span 2; }
}

@media (max-width: 720px) {
  .profile-button .profile-name, .product-name { display: none; }
  .wrap { width: min(100% - 28px, 1240px); }
  .hero { min-height: auto; padding-top: 70px; }
  .hero-visual { min-height: 330px; }
  .float-card { min-width: 145px; }
  .float-card.one { left: 4%; }
  .float-card.two { right: 3%; }
  .grid-2, .grid-3, .grid-4, .pathway-grid, .mission-grid, .continue-card, .data-lab { grid-template-columns: 1fr; }
  .continue-art { min-height: 180px; }
  .filters { grid-template-columns: 1fr 1fr; }
  .filters .field:first-child { grid-column: 1 / -1; }
  .filter-bar { position: static; }
  .mission-layout { grid-template-columns: 1fr; }
  .step-nav { position: static; display: flex; gap: 6px; overflow-x: auto; max-height: none; }
  .step-button { min-width: 160px; }
  .mission-actions { align-items: stretch; flex-direction: column; }
  .playground-tabs { display: flex; gap: 6px; padding: 8px; background: #0a100c; }
  .code-pane.hidden-mobile { display: none; }
  .sample-grid { grid-template-columns: repeat(3, 1fr); }
  .bar { grid-template-columns: 78px 1fr 38px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}

/* Teaching layout: room to build, with explanations available on demand. */
.learning-shell { background:#f4f5ef; }
.learning-shell .mission-header { background:#e8efe5; color:#173c28; padding:28px 0 18px; }
.learning-shell .mission-header .link-button { color:#285d3d; font-size:13px; }
.learning-shell .mission-header .eyebrow { color:#52715b; margin:20px 0 8px; }
.lesson-heading { display:flex; justify-content:space-between; align-items:center; gap:24px; }
.lesson-heading h1 { font-size:clamp(25px,3vw,38px); letter-spacing:-.035em; margin:0 0 20px; }
.lesson-duration { max-width:210px; font-size:13px; color:#526556; }
.learning-shell .progress-track { height:5px; max-width:640px; background:#d3dfd0; }
.learning-shell .lesson-progress { font-size:12px; color:#526556; margin:8px 0 0; }
.learning-shell .mission-layout { grid-template-columns:218px minmax(0,1fr); gap:28px; padding-top:28px; }
.lesson-sidebar { position:sticky; top:90px; display:grid; gap:14px; }
.learning-shell .step-nav { position:static; max-height:none; padding:12px; }
.step-nav>.eyebrow { margin:10px 12px 16px; }
.learning-shell .step-button { padding:14px 10px; border-radius:10px; align-items:center; }
.learning-shell .step-button.active { background:#e7f2e8; color:#174b32; box-shadow:inset 3px 0 #23834f; }
.lesson-glossary { padding:18px; font-size:13px; }
.lesson-glossary dt { font-weight:750; margin-top:16px; }
.lesson-glossary dd { margin:4px 0; color:#54665a; line-height:1.55; }
.lesson-tool { display:flex; flex-wrap:wrap; justify-content:space-between; align-items:center; gap:16px; padding:20px 24px; margin-bottom:18px; border:1px solid #cedccc; border-radius:18px; background:#fafff8; }
.lesson-tool>div { display:grid; gap:5px; }
.lesson-tool strong { font-size:20px; }
.lesson-tool>div>span:last-child { font-size:14px; color:#536959; }
.lesson-tool details { width:100%; font-size:14px; line-height:1.7; border-top:1px solid #dbe6d8; padding-top:12px; }
.lesson-tool details li { padding:6px 0; }
.learning-shell .step-card { padding:clamp(22px,3vw,40px); border-radius:20px; }
.learning-shell .step-card h2 { font-size:clamp(28px,3.6vw,42px); line-height:1.1; margin-bottom:12px; }
.lesson-goal { margin:0 0 28px; font-size:18px; line-height:1.6; color:#435e4c; max-width:64ch; }
.lesson-visual { margin:0 0 28px; border:1px solid #dbe3da; border-radius:16px; overflow:hidden; background:#f8faf7; }
.visual-label { display:flex; justify-content:space-between; gap:12px; padding:12px 18px; font-size:13px; font-weight:750; }
.visual-label span { font-weight:400; color:#65796c; font-size:12px; }
.lesson-visual img { display:block; width:100%; height:auto; object-fit:contain; background:white; }
.lesson-visual a:focus-visible { outline:3px solid #1b7345; outline-offset:-3px; display:block; }
.lesson-visual figcaption { padding:14px 18px 8px; font-size:14px; line-height:1.6; }
.lesson-visual figcaption span { display:block; font-size:12px; color:#617467; margin-top:5px; }
.image-credit { margin:4px 18px 14px; font-size:11px; color:#63736a; }
.action-heading { display:flex; align-items:baseline; justify-content:space-between; gap:12px; margin:24px 0 14px; }
.learning-shell .action-heading h3 { margin:0; font-size:19px; }
.action-heading>span,.action-heading>a { font-size:12px; color:#62756a; }
.lesson-actions { list-style:none; padding:0; margin:0; display:grid; gap:0; }
.lesson-actions li { display:grid; grid-template-columns:32px minmax(0,1fr); gap:15px; padding:17px 0; border-bottom:1px solid #edf0e9; }
.action-number { display:grid; place-items:center; width:30px; height:30px; border-radius:50%; background:#edf4e9; color:#245535; font-size:13px; font-weight:750; }
.lesson-actions p { margin:1px 0 0; font-size:16px; line-height:1.75; max-width:70ch; }
.lesson-actions code { background:#f0f3ec; padding:2px 5px; border-radius:4px; font-size:.9em; }
.code-recipe { margin:22px 0; border:1px solid #d2ded0; border-radius:14px; overflow:hidden; background:#f5f8f1; }
.code-recipe summary { padding:14px 18px; font-weight:650; font-size:14px; }
.code-recipe pre,.lesson-tool pre { margin:0; padding:18px; overflow:auto; background:#163c2a; color:#e9f5e6; font:13px/1.8 var(--mono); tab-size:2; }
.code-recipe p { font-size:12px; color:#5f7064; padding:0 18px; }
.lesson-result { display:flex; gap:15px; margin:24px 0 12px; padding:20px; border-radius:14px; background:#eaf5e7; border:1px solid #cbe3c5; }
.lesson-result>span { display:grid; place-items:center; flex:0 0 26px; height:26px; background:#2f7641; color:white; border-radius:50%; }
.learning-shell .lesson-result h3 { margin:2px 0 6px; font-size:15px; }
.lesson-result p { font-size:15px; line-height:1.7; margin:0; }
.lesson-help,.lesson-check,.lesson-finish { margin:12px 0; border:1px solid #dce3d7; border-radius:12px; background:#fcfdfa; overflow:hidden; }
.lesson-help>summary,.lesson-check>summary,.lesson-finish>summary { padding:16px 18px; font-size:14px; font-weight:650; }
summary { cursor:pointer; }
summary:focus-visible { outline:3px solid #287645; outline-offset:-3px; }
.lesson-help>p,.lesson-help>ul { padding:0 18px 12px; margin:0; line-height:1.7; font-size:15px; }
.lesson-help>ul { padding-left:38px; }
.lesson-check .checkpoint { margin:0; border:0; border-radius:0; }
.lesson-finish>section { padding:0 20px 20px; }
.learning-shell .guide-panel { position:static; max-height:none; border:0; border-radius:0; }
.learning-shell .guide-head { padding:12px 18px; background:#ecf1e9; color:#193c29; }
.learning-shell .guide-head small { color:#4d6f57; }
.learning-shell .guide-head h3 { margin:6px 0; font-size:18px; }
.workspace-hint { color:#54675b; font-size:14px; line-height:1.7; }
#workspace { scroll-margin-top:100px; }
.learning-shell .code-grid { grid-template-columns:1fr; gap:0; }
.learning-shell .code-editor { min-height:300px; font-size:14px; }
.learning-shell .preview-frame { min-height:420px; }
.learning-shell .code-toolbar .button.ghost { color:#e4f0e5; border-color:#667c6a; }
.learning-shell .mission-actions { flex-wrap:wrap; padding-top:14px; border-top:1px solid #e5e9df; }
.learning-shell .data-lab { grid-template-columns:1fr; }
.learning-shell .bar-fill { display:block; }
.mission-brief { margin-top:28px; }
.start-guide { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; margin:24px 0 0; }
.start-guide>div { border:1px solid #d8e2d2; padding:18px; border-radius:14px; background:#fafff8; }
.start-guide strong { display:block; margin-bottom:8px; }
.start-guide p { margin:0; font-size:14px; line-height:1.65; color:#526655; }
.start-steps { padding-left:22px; margin-bottom:0; }
.start-steps li { padding:8px 0; }
.start-steps p { margin:6px 0; font-size:14px; color:#526655; line-height:1.6; }
.tool-map { margin:0 0 26px; padding:16px; background:#f1f5ed; border:1px solid #d7e3d2; border-radius:16px; }
.tool-map svg { display:block; width:100%; height:auto; font:15px system-ui; }
.tool-map figcaption { margin-top:12px; font-size:12px; line-height:1.7; color:#53695a; }
.learning-flow { display:flex; gap:18px; align-items:center; justify-content:space-around; }
.learning-flow>div { min-width:0; flex:1; }
.learning-flow span { display:block; font-size:12px; color:#58725f; margin-bottom:8px; }
.learning-flow strong { font-size:17px; }
.learning-flow p { font-size:13px; line-height:1.6; margin:6px 0; }
.learning-flow code { overflow-wrap:anywhere; font-size:13px; }
@media(min-width:1500px) { .learning-shell .code-grid { grid-template-columns:1fr 1fr; } }
@media(max-width:850px) {
 .learning-shell .mission-layout { grid-template-columns:1fr; gap:18px; }
 .lesson-sidebar { position:static; }
 .learning-shell .step-nav { display:flex; overflow:auto; gap:4px; }
 .step-nav>.eyebrow { display:none; }
 .learning-shell .step-button { min-width:150px; max-width:180px; flex-shrink:0; }
 .lesson-glossary { padding:12px 18px; }
 .lesson-glossary dl { display:grid; grid-template-columns:100px 1fr; gap:12px; }
 .lesson-glossary dt,.lesson-glossary dd { margin:0; }
 .lesson-heading { display:block; }
 .lesson-duration { display:block; max-width:none; margin-bottom:16px; }
 .lesson-tool { padding:18px; }
 .start-guide { grid-template-columns:1fr; }
}
@media(max-width:500px) {
 .learning-flow { flex-direction:column; align-items:stretch; gap:12px; }
 .learning-flow>b { transform:rotate(90deg); align-self:center; }
 .learning-shell .step-card { padding:20px 16px; }
 .lesson-actions li { gap:10px; grid-template-columns:28px 1fr; }
 .lesson-actions p { font-size:15px; }
 .visual-label { flex-direction:column; gap:2px; }
 .action-heading>span { display:none; }
 .lesson-tool>.button { width:100%; }
 .lesson-glossary dl { display:block; }
 .lesson-glossary dt { margin-top:14px; }
}