/* AICOFI Learn — study-desk skin on AICOFI-family tokens. Dark-default with a full light theme. Education palette: indigo → teal, amber "streak" accent. All motion is transform/opacity and disabled under prefers-reduced-motion. */ :root { --indigo: #6c8cff; --teal: #18c9b4; --amber: #ffb547; --rose: #ff6b9d; --violet: #a78bfa; --accent: var(--indigo); --accent-2: var(--teal); --radius: 18px; --radius-sm: 12px; --radius-lg: 26px; --maxw: 1140px; --dur: 320ms; --ease: cubic-bezier(0.16, 1, 0.3, 1); } /* ---- dark (default) ---- */ :root, :root[data-theme="dark"] { color-scheme: dark; --bg: #0a1020; --ink: #eef2ff; --muted: #98a4c8; --muted-2: #6c78a2; --line: rgba(150, 170, 235, 0.16); --line-strong: rgba(150, 170, 235, 0.3); --surface: rgba(21, 29, 56, 0.72); --surface-2: rgba(28, 39, 72, 0.66); --surface-solid: #131b36; --chip: rgba(255, 255, 255, 0.07); --shadow: 0 24px 70px rgba(4, 8, 24, 0.5); --page-bg: radial-gradient(circle at 84% -8%, rgba(24, 201, 180, 0.16), transparent 40%), radial-gradient(circle at 2% 2%, rgba(108, 140, 255, 0.18), transparent 38%), linear-gradient(180deg, #0a1020 0%, #0b1330 52%, #0a1020 100%); } :root[data-theme="light"] { color-scheme: light; --bg: #f5f7ff; --ink: #0a1230; --muted: #58618a; --muted-2: #8a93b8; --line: rgba(20, 30, 70, 0.12); --line-strong: rgba(20, 30, 70, 0.22); --surface: rgba(255, 255, 255, 0.88); --surface-2: rgba(255, 255, 255, 0.96); --surface-solid: #ffffff; --chip: rgba(12, 20, 60, 0.05); --shadow: 0 22px 60px rgba(30, 45, 92, 0.14); --page-bg: radial-gradient(circle at 86% -6%, rgba(24, 201, 180, 0.14), transparent 36%), radial-gradient(circle at 1% 1%, rgba(108, 140, 255, 0.14), transparent 32%), linear-gradient(180deg, #ffffff 0%, #f2f5ff 50%, #ffffff 100%); } * { box-sizing: border-box; } html { scroll-behavior: smooth; } body { margin: 0; min-height: 100vh; color: var(--ink); font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--page-bg); background-attachment: fixed; -webkit-font-smoothing: antialiased; } a { color: inherit; } img { max-width: 100%; } .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; } /* i18n visibility toggled by */ :root[data-lang="en"] .lang-zh, :root[data-lang="zh"] .lang-en { display: none; } .wrap { width: min(100% - 2.4rem, var(--maxw)); margin-inline: auto; } /* ---------- header ---------- */ .site-header { position: sticky; top: 0; z-index: 40; backdrop-filter: blur(14px); background: color-mix(in oklab, var(--bg) 78%, transparent); border-bottom: 1px solid var(--line); } .site-header .wrap { display: flex; align-items: center; gap: 1rem; padding-block: 0.72rem; } .brand { display: inline-flex; align-items: center; gap: 0.5rem; text-decoration: none; font-weight: 800; } .brand .dot { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; font-size: 1rem; background: linear-gradient(135deg, var(--indigo), var(--teal)); box-shadow: 0 6px 18px rgba(24, 201, 180, 0.35); } .brand .name { letter-spacing: -0.02em; } .brand .name b { color: var(--ink); } .brand .name span { color: var(--accent-2); } .header-spacer { flex: 1; } .up-link { font-size: 0.82rem; color: var(--muted); text-decoration: none; padding: 0.4rem 0.7rem; border: 1px solid var(--line); border-radius: 999px; transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease); } .up-link:hover { color: var(--ink); border-color: var(--line-strong); } .icon-btn { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 11px; cursor: pointer; background: var(--chip); color: var(--ink); border: 1px solid var(--line); font: inherit; font-size: 0.9rem; font-weight: 700; transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease); } .icon-btn:hover { transform: translateY(-1px); border-color: var(--line-strong); } :root[data-theme="dark"] .theme-btn .sun, :root[data-theme="light"] .theme-btn .moon { display: none; } /* ---------- hero ---------- */ .hero { padding: clamp(2.4rem, 1rem + 6vw, 5rem) 0 1.4rem; } .hero-inner { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 2rem; align-items: center; } .eyebrow { display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent-2); padding: 0.32rem 0.7rem; border-radius: 999px; background: var(--chip); border: 1px solid var(--line); } .hero h1 { margin: 1rem 0 0.6rem; line-height: 1.02; letter-spacing: -0.03em; font-size: clamp(2.3rem, 1rem + 5.6vw, 4.4rem); font-weight: 900; } .hero h1 .grad { background: linear-gradient(120deg, var(--indigo), var(--teal) 60%, var(--amber)); -webkit-background-clip: text; background-clip: text; color: transparent; } .hero p.lede { color: var(--muted); font-size: clamp(1rem, 0.9rem + 0.5vw, 1.2rem); max-width: 46ch; margin: 0; } .hero-cta { display: flex; gap: 0.7rem; margin-top: 1.5rem; flex-wrap: wrap; } .btn { display: inline-flex; align-items: center; gap: 0.5rem; cursor: pointer; font: inherit; font-weight: 700; text-decoration: none; padding: 0.72rem 1.15rem; border-radius: 12px; border: 1px solid transparent; transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease); } .btn-primary { color: #06111f; background: linear-gradient(135deg, var(--teal), var(--indigo)); box-shadow: 0 12px 30px rgba(24, 201, 180, 0.3); } .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 40px rgba(24, 201, 180, 0.42); } .btn-ghost { color: var(--ink); background: var(--surface); border-color: var(--line); } .btn-ghost:hover { transform: translateY(-2px); border-color: var(--line-strong); } /* hero stat card */ .hero-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 1.4rem; box-shadow: var(--shadow); backdrop-filter: blur(12px); } .hero-card h3 { margin: 0 0 0.9rem; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted-2); } .stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.7rem; } .stat { text-align: center; padding: 0.7rem 0.4rem; border-radius: var(--radius-sm); background: var(--surface-2); border: 1px solid var(--line); } .stat b { display: block; font-size: 1.6rem; font-weight: 900; letter-spacing: -0.02em; } .stat span { font-size: 0.72rem; color: var(--muted); } .stat.streak b { color: var(--amber); } .stat.xp b { color: var(--teal); } .stat.lvl b { color: var(--indigo); } /* ---------- tabs ---------- */ .tab-nav { display: flex; gap: 0.4rem; margin: 1.8rem 0 1.2rem; flex-wrap: wrap; } .tab { font: inherit; font-weight: 600; cursor: pointer; color: var(--muted); background: transparent; padding: 0.5rem 0.95rem; border-radius: 999px; border: 1px solid var(--line); transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease); } .tab:hover { color: var(--ink); border-color: var(--line-strong); } .tab.is-active { color: #06111f; background: linear-gradient(135deg, var(--teal), var(--indigo)); border-color: transparent; } /* ---------- filters ---------- */ .filters { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.2rem; } .chip { font: inherit; font-size: 0.82rem; font-weight: 600; cursor: pointer; color: var(--muted); background: var(--chip); border: 1px solid var(--line); padding: 0.36rem 0.75rem; border-radius: 999px; transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease); } .chip:hover { color: var(--ink); } .chip.is-active { color: var(--ink); border-color: var(--cat, var(--accent)); box-shadow: inset 0 0 0 1px var(--cat, var(--accent)); } .chip .swatch { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 0.4rem; vertical-align: middle; background: var(--cat, var(--accent)); } /* ---------- track grid ---------- */ .grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.1rem; } .card { position: relative; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow); backdrop-filter: blur(10px); cursor: pointer; text-align: left; transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease); } .card::before { content: ""; position: absolute; inset: 0 auto auto 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--cat, var(--accent)), transparent); } .card:hover { transform: translateY(-4px); border-color: var(--line-strong); } .card-top { display: flex; align-items: flex-start; gap: 0.9rem; } .card-ico { width: 48px; height: 48px; border-radius: 14px; flex: none; display: grid; place-items: center; font-size: 1.5rem; background: color-mix(in oklab, var(--cat, var(--accent)) 18%, var(--surface-2)); border: 1px solid var(--line); } .card h3 { margin: 0.1rem 0 0.25rem; font-size: 1.12rem; letter-spacing: -0.01em; } .card .tagline { margin: 0; color: var(--muted); font-size: 0.9rem; } .card-meta { display: flex; align-items: center; gap: 0.5rem; margin-top: 1rem; flex-wrap: wrap; } .pill { font-size: 0.72rem; font-weight: 700; padding: 0.24rem 0.6rem; border-radius: 999px; background: var(--chip); border: 1px solid var(--line); color: var(--muted); } .pill.cat { color: var(--cat, var(--accent)); border-color: color-mix(in oklab, var(--cat, var(--accent)) 40%, var(--line)); } .card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 1rem; gap: 0.8rem; } .card-foot .prog-label { font-size: 0.78rem; color: var(--muted); } /* progress ring */ .ring { --p: 0; width: 46px; height: 46px; flex: none; display: grid; place-items: center; border-radius: 50%; background: conic-gradient(var(--cat, var(--accent)) calc(var(--p) * 1%), var(--line) 0); } .ring i { width: 34px; height: 34px; border-radius: 50%; background: var(--surface-solid); display: grid; place-items: center; font-style: normal; font-size: 0.68rem; font-weight: 800; color: var(--ink); } /* ---------- lesson view ---------- */ .subhead { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 1.2rem; flex-wrap: wrap; } .back-btn { font: inherit; font-weight: 600; cursor: pointer; color: var(--muted); background: var(--chip); border: 1px solid var(--line); border-radius: 999px; padding: 0.4rem 0.8rem; } .back-btn:hover { color: var(--ink); } .subhead h2 { margin: 0; font-size: clamp(1.4rem, 1rem + 2vw, 2rem); letter-spacing: -0.02em; } .lesson-layout { display: grid; grid-template-columns: 300px 1fr; gap: 1.4rem; align-items: start; } .module-list { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 0.8rem; box-shadow: var(--shadow); position: sticky; top: 78px; } .module-list h4 { margin: 0.7rem 0.6rem 0.4rem; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted-2); } .lesson-link { display: flex; align-items: center; gap: 0.6rem; width: 100%; text-align: left; font: inherit; cursor: pointer; color: var(--ink); background: transparent; border: 0; border-radius: 10px; padding: 0.55rem 0.6rem; } .lesson-link:hover { background: var(--chip); } .lesson-link.is-active { background: color-mix(in oklab, var(--accent) 16%, var(--surface-2)); } .lesson-link .tick { width: 20px; height: 20px; flex: none; border-radius: 50%; border: 1.5px solid var(--line-strong); display: grid; place-items: center; font-size: 0.7rem; color: var(--muted-2); } .lesson-link.done .tick { background: var(--teal); border-color: var(--teal); color: #06111f; } .lesson-link span.t { font-size: 0.9rem; } .reader { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.2rem, 1rem + 2vw, 2rem); box-shadow: var(--shadow); } .reader h3 { margin: 0 0 0.4rem; font-size: clamp(1.3rem, 1rem + 1.6vw, 1.8rem); letter-spacing: -0.02em; } .reader .concept { color: var(--ink); font-size: 1.05rem; line-height: 1.6; } .reader .points { list-style: none; padding: 0; margin: 1.2rem 0; display: grid; gap: 0.6rem; } .reader .points li { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.7rem 0.9rem; background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius-sm); } .reader .points li::before { content: "→"; color: var(--accent-2); font-weight: 800; } .example { margin-top: 1rem; padding: 1rem 1.1rem; border-left: 3px solid var(--amber); background: color-mix(in oklab, var(--amber) 8%, var(--surface-2)); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; } .example b { display: block; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--amber); margin-bottom: 0.35rem; } .example .code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.92rem; white-space: pre-wrap; } .reader-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 1.6rem; gap: 0.8rem; flex-wrap: wrap; } /* ---------- quiz / flashcards ---------- */ .mode-switch { display: inline-flex; padding: 0.25rem; gap: 0.25rem; background: var(--chip); border: 1px solid var(--line); border-radius: 999px; margin-bottom: 1.2rem; } .mode-switch button { font: inherit; font-weight: 600; cursor: pointer; color: var(--muted); background: transparent; border: 0; border-radius: 999px; padding: 0.4rem 0.9rem; } .mode-switch button.is-active { color: #06111f; background: linear-gradient(135deg, var(--teal), var(--indigo)); } .flashcard { perspective: 1200px; height: 260px; max-width: 560px; margin: 0 auto 1.2rem; cursor: pointer; } .flashcard-inner { position: relative; width: 100%; height: 100%; transition: transform 0.5s var(--ease); transform-style: preserve-3d; } .flashcard.flipped .flashcard-inner { transform: rotateY(180deg); } .flashcard .face { position: absolute; inset: 0; backface-visibility: hidden; display: grid; place-items: center; text-align: center; padding: 2rem; border-radius: var(--radius-lg); border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--surface); } .flashcard .face .tag { position: absolute; top: 1rem; left: 1.2rem; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted-2); } .flashcard .face p { margin: 0; font-size: 1.3rem; font-weight: 700; line-height: 1.4; letter-spacing: -0.01em; } .flashcard .back { transform: rotateY(180deg); background: linear-gradient(160deg, color-mix(in oklab, var(--teal) 14%, var(--surface)), var(--surface)); } .deck-nav { display: flex; align-items: center; justify-content: center; gap: 1rem; } .deck-nav .count { color: var(--muted); font-size: 0.9rem; min-width: 60px; text-align: center; } .quiz-q { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.2rem, 1rem + 2vw, 1.8rem); box-shadow: var(--shadow); max-width: 620px; margin: 0 auto; } .quiz-q .qnum { font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted-2); } .quiz-q h3 { margin: 0.4rem 0 1.2rem; font-size: 1.25rem; letter-spacing: -0.01em; line-height: 1.4; } .options { display: grid; gap: 0.6rem; } .opt { display: flex; align-items: center; gap: 0.7rem; font: inherit; text-align: left; cursor: pointer; color: var(--ink); background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.85rem 1rem; transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease); } .opt:hover:not(:disabled) { transform: translateX(3px); border-color: var(--line-strong); } .opt .key { width: 24px; height: 24px; flex: none; border-radius: 7px; display: grid; place-items: center; font-size: 0.8rem; font-weight: 800; background: var(--chip); border: 1px solid var(--line); } .opt.correct { border-color: var(--teal); background: color-mix(in oklab, var(--teal) 14%, var(--surface-2)); } .opt.correct .key { background: var(--teal); color: #06111f; } .opt.wrong { border-color: var(--rose); background: color-mix(in oklab, var(--rose) 12%, var(--surface-2)); } .opt.wrong .key { background: var(--rose); color: #fff; } .quiz-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 1.3rem; gap: 0.8rem; } .quiz-progress { height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; margin-bottom: 1.2rem; max-width: 620px; margin-inline: auto; } .quiz-progress i { display: block; height: 100%; background: linear-gradient(90deg, var(--teal), var(--indigo)); transition: width var(--dur) var(--ease); } .result { text-align: center; max-width: 480px; margin: 0 auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 2.2rem; box-shadow: var(--shadow); } .result .score { font-size: 3.4rem; font-weight: 900; letter-spacing: -0.03em; background: linear-gradient(120deg, var(--teal), var(--indigo)); -webkit-background-clip: text; background-clip: text; color: transparent; } .result p { color: var(--muted); } /* ---------- progress dashboard ---------- */ .dash { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.6rem; } .dash .big { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.4rem; box-shadow: var(--shadow); } .dash .big b { display: block; font-size: 2.6rem; font-weight: 900; letter-spacing: -0.03em; } .dash .big.streak b { color: var(--amber); } .dash .big.xp b { color: var(--teal); } .dash .big.lvl b { color: var(--indigo); } .dash .big.done b { color: var(--rose); } .dash .big span { color: var(--muted); font-size: 0.85rem; } .track-progress { display: grid; gap: 0.7rem; } .tp-row { display: flex; align-items: center; gap: 0.9rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.8rem 1rem; } .tp-row .ico { font-size: 1.3rem; } .tp-row .meta { flex: 1; } .tp-row .meta b { font-size: 0.95rem; } .tp-bar { height: 8px; border-radius: 999px; background: var(--line); overflow: hidden; margin-top: 0.4rem; } .tp-bar i { display: block; height: 100%; background: var(--cat, var(--accent)); transition: width var(--dur) var(--ease); } .tp-row .pct { font-weight: 800; font-variant-numeric: tabular-nums; } .empty { text-align: center; color: var(--muted); padding: 3rem 1rem; } /* toast for XP awards */ .toast { position: fixed; left: 50%; bottom: 1.6rem; transform: translateX(-50%) translateY(140%); z-index: 60; background: var(--surface-solid); color: var(--ink); border: 1px solid var(--line-strong); border-radius: 999px; padding: 0.7rem 1.2rem; box-shadow: var(--shadow); font-weight: 700; transition: transform 0.45s var(--ease); display: flex; align-items: center; gap: 0.5rem; } .toast.show { transform: translateX(-50%) translateY(0); } .toast .xp-badge { color: var(--teal); } /* ---------- footer ---------- */ .site-footer { margin-top: 4rem; border-top: 1px solid var(--line); } .site-footer .wrap { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 2rem; padding-block: 1.8rem; } .footer-brand { display: flex; flex-direction: column; gap: 0.2rem; } .footer-logo-img { height: 26px; width: auto; } :root[data-theme="dark"] .footer-logo-light, :root[data-theme="light"] .footer-logo-dark { display: none; } .footer-brand p { margin: 0; font-size: 0.78rem; color: var(--muted-2); } .footer-links, .footer-social { display: flex; gap: 1rem; align-items: center; } .footer-links { margin-left: auto; } .footer-links a { font-size: 0.82rem; color: var(--muted); text-decoration: none; } .footer-links a:hover { color: var(--ink); } .footer-social a { color: var(--muted); transition: color var(--dur) var(--ease), transform var(--dur) var(--ease); } .footer-social a:hover { color: var(--ink); transform: translateY(-2px); } /* ---------- responsive ---------- */ @media (max-width: 860px) { .hero-inner { grid-template-columns: 1fr; } .hero-card { order: -1; } .lesson-layout { grid-template-columns: 1fr; } .module-list { position: static; } } @media (max-width: 520px) { .footer-links { margin-left: 0; } .stat b { font-size: 1.3rem; } } @media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } .flashcard-inner { transition: none; } } /* fade-in for view swaps */ .view { animation: fade var(--dur) var(--ease); } @keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }