/* ============================================================ Study Notes — Shared Stylesheet Used by every subject and session page. Per-subject accent is set via --accent on . ============================================================ */ /* ---------- Design tokens ---------- */ :root { --bg: #f7f5f0; /* warm paper */ --bg-soft: #fffdf8; --surface: #ffffff; --surface-2: #f3f0e9; --ink: #23211c; /* near-black, warm */ --ink-soft: #54514a; --ink-faint: #8a867c; --line: #e6e1d6; --line-strong: #d8d2c4; --accent: #5b4bd6; /* default = GenAI violet */ --accent-soft: #efeafe; --accent-ink: #3a2db0; /* Callout palettes */ --eli5-bg: #fff6e6; --eli5-line: #f1c27a; --eli5-ink: #8a5a06; --ex-bg: #eafaf1; --ex-line: #9bd9b6; --ex-ink: #1d7a4d; --key-bg: #eef3ff; --key-line: #a9c2f5; --key-ink: #234aa0; --warn-bg: #fdeeee; --warn-line: #f0aeae; --warn-ink: #9c2b2b; --note-bg: #f2f0fb; --note-line: #c8c0ee; --note-ink: #4a3aa8; --radius: 14px; --radius-sm: 9px; --shadow: 0 1px 2px rgba(40,35,20,.04), 0 8px 28px rgba(40,35,20,.06); --shadow-lg: 0 12px 48px rgba(40,35,20,.14); --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif; --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif; --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, monospace; --maxw: 1180px; } /* ---------- Per-subject accent themes (light) ---------- */ [data-accent="hld"] { --accent: #2f6fed; --accent-soft: #e7efff; --accent-ink: #1b4dc0; } [data-accent="nn"] { --accent: #e8590c; --accent-soft: #fff0e6; --accent-ink: #b8430a; } [data-accent="dbms"] { --accent: #1f9d57; --accent-soft: #e4f6ec; --accent-ink: #137a41; } /* ---------- Per-subject accent themes (dark) ---------- */ [data-theme="dark"] [data-accent="hld"] { --accent: #74a4ff; --accent-soft: #1b2742; --accent-ink: #a9c5ff; } [data-theme="dark"] [data-accent="nn"] { --accent: #ff9b5c; --accent-soft: #3a2415; --accent-ink: #ffba8a; } [data-theme="dark"] [data-accent="dbms"]{ --accent: #4fcd8a; --accent-soft: #15301f; --accent-ink: #8fe3b4; } [data-theme="dark"] { --bg: #16151a; --bg-soft: #1c1b21; --surface: #201f27; --surface-2: #26252e; --ink: #ece9e3; --ink-soft: #b7b3aa; --ink-faint: #87837b; --line: #322f3a; --line-strong: #403c4a; --accent: #9b8cff; --accent-soft: #2a2547; --accent-ink: #c5bbff; --eli5-bg: #2e2716; --eli5-line: #6b5524; --eli5-ink: #f0c474; --ex-bg: #16291f; --ex-line: #2f5a42; --ex-ink: #86d7a8; --key-bg: #1a2238; --key-line: #335089; --key-ink: #9cbcf5; --warn-bg: #311c1c; --warn-line: #6e3636; --warn-ink: #f0a3a3; --note-bg: #221f33; --note-line: #423a6e; --note-ink: #c0b6f5; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 28px rgba(0,0,0,.4); --shadow-lg: 0 12px 48px rgba(0,0,0,.55); } /* ---------- Base ---------- */ * { box-sizing: border-box; } html { scroll-behavior: smooth; scroll-padding-top: 90px; } body { margin: 0; font-family: var(--font-sans); background: var(--bg); color: var(--ink); line-height: 1.65; -webkit-font-smoothing: antialiased; transition: background .3s ease, color .3s ease; } a { color: var(--accent-ink); text-decoration: none; } a:hover { text-decoration: underline; } img { max-width: 100%; } /* ---------- Top bar ---------- */ .topbar { position: sticky; top: 0; z-index: 50; display: flex; align-items: center; gap: 16px; padding: 12px clamp(16px, 4vw, 40px); background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); } .topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.01em; color: var(--ink); } .topbar .brand:hover { text-decoration: none; } .brand-dot { width: 26px; height: 26px; border-radius: 8px; background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 50%, #ff8fae)); display: grid; place-items: center; color: #fff; font-size: 15px; font-weight: 800; } .crumbs { color: var(--ink-faint); font-size: .9rem; margin-left: 2px; } .crumbs a { color: var(--ink-soft); } .topbar .spacer { flex: 1; } .icon-btn { border: 1px solid var(--line-strong); background: var(--surface); color: var(--ink-soft); width: 38px; height: 38px; border-radius: 10px; cursor: pointer; font-size: 16px; display: grid; place-items: center; transition: transform .15s ease, background .2s; } .icon-btn:hover { transform: translateY(-1px); background: var(--surface-2); } /* reading progress */ #progress { position: fixed; top: 0; left: 0; height: 3px; width: 0%; background: linear-gradient(90deg, var(--accent), #ff8fae); z-index: 60; transition: width .1s linear; } /* ---------- Layout ---------- */ .wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 4vw, 40px); } .page-hero { padding: clamp(40px, 7vw, 80px) 0 clamp(24px, 4vw, 40px); } .kicker { display: inline-block; font-size: .78rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-ink); background: var(--accent-soft); padding: 5px 12px; border-radius: 999px; } .page-hero h1 { font-family: var(--font-serif); font-size: clamp(2rem, 5vw, 3.3rem); line-height: 1.08; letter-spacing: -.02em; margin: 18px 0 12px; } .page-hero p.lead { font-size: 1.12rem; color: var(--ink-soft); max-width: 65ch; margin: 0; } /* reading-time / meta badges in hero */ .hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; } .badge-rt { display: inline-flex; align-items: center; gap: 6px; font-size: .85rem; font-weight: 600; color: var(--accent-ink); background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); padding: 6px 13px; border-radius: 999px; } /* reading time on cards */ .card .rt { font-size: .82rem; color: var(--ink-faint); font-weight: 600; margin: 0 0 10px; display: flex; align-items: center; gap: 5px; } /* ---------- Subject / session cards ---------- */ .card-grid { display: grid; gap: 20px; padding-bottom: 70px; } .card-grid.cols-2 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); } .card { display: block; position: relative; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); transition: transform .18s ease, box-shadow .18s ease, border-color .18s; } .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--line-strong); text-decoration: none; } .card .num { font-family: var(--font-mono); font-size: .82rem; color: var(--accent-ink); font-weight: 700; letter-spacing: .04em; } .card h3 { font-family: var(--font-serif); font-size: 1.35rem; margin: 8px 0 8px; color: var(--ink); letter-spacing: -.01em; } .card p { margin: 0 0 14px; color: var(--ink-soft); font-size: .96rem; } .card .tags { display: flex; flex-wrap: wrap; gap: 7px; } .tag { font-size: .76rem; color: var(--ink-soft); background: var(--surface-2); border: 1px solid var(--line); padding: 3px 10px; border-radius: 999px; } .card .go { margin-top: 16px; font-weight: 600; color: var(--accent-ink); font-size: .92rem; } .card.locked { opacity: .55; pointer-events: none; } .card.locked .go { color: var(--ink-faint); } .card .accent-bar { position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--accent); } /* ---------- Article layout (session pages) ---------- */ .article-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 48px; padding-bottom: 100px; } @media (max-width: 920px) { .article-layout { grid-template-columns: 1fr; gap: 0; } } /* table of contents */ .toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 110px); overflow-y: auto; padding-right: 6px; } .toc h4 { font-size: .76rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-faint); margin: 0 0 12px; } .toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; } .toc li { counter-increment: toc; margin: 2px 0; } .toc a { display: flex; gap: 10px; padding: 7px 10px; border-radius: 8px; color: var(--ink-soft); font-size: .9rem; line-height: 1.35; border-left: 2px solid transparent; } .toc a::before { content: counter(toc); font-family: var(--font-mono); font-size: .76rem; color: var(--ink-faint); min-width: 16px; } .toc a:hover { background: var(--surface-2); text-decoration: none; color: var(--ink); } .toc a.active { color: var(--accent-ink); background: var(--accent-soft); border-left-color: var(--accent); font-weight: 600; } @media (max-width: 920px) { .toc { position: static; max-height: none; margin-bottom: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); } } /* article body */ .article { min-width: 0; } .article > section { scroll-margin-top: 90px; margin-bottom: 64px; } .article h2 { font-family: var(--font-serif); font-size: clamp(1.6rem, 3.4vw, 2.1rem); letter-spacing: -.015em; margin: 0 0 6px; padding-top: 8px; display: flex; align-items: baseline; gap: 12px; } .article h2 .sec-num { font-family: var(--font-mono); font-size: 1rem; color: var(--accent); background: var(--accent-soft); border-radius: 8px; padding: 2px 9px; font-weight: 700; } .article h3 { font-size: 1.22rem; margin: 32px 0 8px; letter-spacing: -.01em; } .article h4 { font-size: 1.04rem; margin: 22px 0 6px; color: var(--ink); } .article p { margin: 12px 0; color: var(--ink); } .article ul, .article ol { margin: 12px 0; padding-left: 24px; } .article li { margin: 7px 0; } .article li::marker { color: var(--accent); } .article strong { color: var(--ink); font-weight: 700; } .section-rule { border: 0; border-top: 1px solid var(--line); margin: 0 0 28px; } /* term highlight */ .term { background: var(--key-bg); color: var(--key-ink); border-bottom: 1.5px solid var(--key-line); padding: 0 3px; border-radius: 3px; font-weight: 600; } /* ---------- Callout boxes ---------- */ .callout { border-radius: var(--radius); padding: 18px 20px 18px 52px; margin: 20px 0; position: relative; border: 1px solid; line-height: 1.6; } .callout::before { position: absolute; left: 16px; top: 16px; font-size: 1.2rem; line-height: 1; } .callout p:first-child { margin-top: 0; } .callout p:last-child { margin-bottom: 0; } .callout .c-title { display: block; font-weight: 800; letter-spacing: .02em; margin-bottom: 4px; font-size: .9rem; text-transform: uppercase; } .callout.eli5 { background: var(--eli5-bg); border-color: var(--eli5-line); color: var(--ink); } .callout.eli5::before { content: "🧸"; } .callout.eli5 .c-title { color: var(--eli5-ink); } .callout.example { background: var(--ex-bg); border-color: var(--ex-line); color: var(--ink); } .callout.example::before { content: "💡"; } .callout.example .c-title { color: var(--ex-ink); } .callout.key { background: var(--key-bg); border-color: var(--key-line); color: var(--ink); } .callout.key::before { content: "🔑"; } .callout.key .c-title { color: var(--key-ink); } .callout.warn { background: var(--warn-bg); border-color: var(--warn-line); color: var(--ink); } .callout.warn::before { content: "⚠️"; } .callout.warn .c-title { color: var(--warn-ink); } .callout.note { background: var(--note-bg); border-color: var(--note-line); color: var(--ink); } .callout.note::before { content: "📝"; } .callout.note .c-title { color: var(--note-ink); } /* analogy / big idea band */ .bigidea { background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent-soft) 40%, var(--surface))); border: 1px solid var(--accent); border-radius: var(--radius); padding: 22px 24px; margin: 22px 0; box-shadow: var(--shadow); } .bigidea .c-title { color: var(--accent-ink); font-weight: 800; text-transform: uppercase; letter-spacing: .04em; font-size: .82rem; } .bigidea p { margin: 6px 0 0; font-size: 1.05rem; } /* code / mono */ code.inl { font-family: var(--font-mono); font-size: .88em; background: var(--surface-2); border: 1px solid var(--line); padding: 1px 6px; border-radius: 6px; color: var(--accent-ink); } pre { background: #1c1b22; color: #e8e6f0; border-radius: var(--radius-sm); padding: 16px 18px; overflow-x: auto; font-family: var(--font-mono); font-size: .86rem; line-height: 1.55; margin: 16px 0; border: 1px solid #2a2935; } pre .cm { color: #8a86a0; } /* comment */ pre .kw { color: #ff9eb6; } /* keyword */ pre .st { color: #9be59b; } /* string */ pre .nm { color: #ffd479; } /* number */ /* figures — embedded diagrams from class handouts */ .figure { margin: 22px 0; text-align: center; } .figure img { max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius-sm); background: #fff; box-shadow: var(--shadow); } .figure figcaption { margin-top: 8px; font-size: .86rem; color: var(--ink-faint); font-style: italic; max-width: 60ch; margin-left: auto; margin-right: auto; } /* multi-language tabbed code blocks */ .codetabs { margin: 18px 0; border: 1px solid #2a2935; border-radius: var(--radius-sm); overflow: hidden; background: #1c1b22; } .codetab-bar { display: flex; flex-wrap: wrap; gap: 2px; background: #14131a; border-bottom: 1px solid #2a2935; padding: 6px 6px 0; } .codetab { background: transparent; border: 0; color: #9a96a8; cursor: pointer; font-family: var(--font-mono); font-size: .8rem; font-weight: 600; padding: 7px 15px; border-radius: 8px 8px 0 0; transition: background .15s, color .15s; } .codetab:hover { color: #e8e6f0; } .codetab.active { background: #1c1b22; color: #fff; box-shadow: inset 0 -2px 0 var(--accent); } .codetabs pre.codepane { display: none; margin: 0; border: 0; border-radius: 0; } .codetabs pre.codepane.active { display: block; } /* tables */ .tbl-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--line); border-radius: var(--radius-sm); } table { border-collapse: collapse; width: 100%; font-size: .94rem; } th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; } th { background: var(--surface-2); font-weight: 700; color: var(--ink); white-space: nowrap; } tr:last-child td { border-bottom: 0; } td:first-child { font-weight: 600; } /* step flow diagram */ .flow { display: flex; flex-wrap: wrap; align-items: stretch; gap: 0; margin: 22px 0; } .flow .step { flex: 1 1 130px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px; text-align: center; box-shadow: var(--shadow); position: relative; min-width: 120px; } .flow .step .s-ico { font-size: 1.5rem; } .flow .step .s-t { font-weight: 700; font-size: .9rem; margin-top: 4px; } .flow .step .s-d { font-size: .8rem; color: var(--ink-soft); margin-top: 2px; } .flow .arrow { display: grid; place-items: center; color: var(--accent); font-size: 1.4rem; padding: 0 4px; } @media (max-width: 640px) { .flow { flex-direction: column; } .flow .arrow { transform: rotate(90deg); } } /* recap / quiz at end of each section */ .recap { background: var(--surface); border: 1px dashed var(--line-strong); border-radius: var(--radius); padding: 18px 22px; margin-top: 24px; } .recap .c-title { color: var(--accent-ink); font-weight: 800; text-transform: uppercase; letter-spacing: .04em; font-size: .8rem; display: block; margin-bottom: 8px; } details.quiz { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 12px 16px; margin: 10px 0; box-shadow: var(--shadow); } details.quiz summary { cursor: pointer; font-weight: 600; color: var(--ink); } details.quiz summary::marker { color: var(--accent); } details.quiz[open] summary { margin-bottom: 8px; } details.quiz .ans { color: var(--ink-soft); } /* prev / next nav */ .pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 40px; border-top: 1px solid var(--line); padding-top: 24px; } .pager a { flex: 1; padding: 16px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); } .pager a:hover { text-decoration: none; border-color: var(--accent); } .pager .dir { font-size: .78rem; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .08em; } .pager .ttl { font-weight: 700; color: var(--ink); margin-top: 2px; } .pager a.next { text-align: right; } .pager a.disabled { opacity: .4; pointer-events: none; } /* footer */ .foot { border-top: 1px solid var(--line); padding: 28px 0 60px; color: var(--ink-faint); font-size: .88rem; text-align: center; } /* small helpers */ .muted { color: var(--ink-soft); } .center { text-align: center; } /* ---------- 1-page cheat sheet (dense multi-column) ---------- */ .sheet-grid { columns: 310px; column-gap: 18px; margin: 12px 0 70px; } .sheet-card { break-inside: avoid; -webkit-column-break-inside: avoid; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px 16px; margin: 0 0 16px; box-shadow: var(--shadow); } .sheet-card h3 { margin: 0 0 8px; font-size: 1.02rem; letter-spacing: -.01em; display: flex; align-items: center; gap: 8px; border-bottom: 1px solid var(--line); padding-bottom: 7px; } .sheet-card h3 .n { font-family: var(--font-mono); font-size: .72rem; color: var(--accent-ink); background: var(--accent-soft); border-radius: 6px; padding: 2px 7px; } .sheet-card ul { margin: 0; padding-left: 18px; } .sheet-card li { margin: 5px 0; font-size: .9rem; line-height: 1.45; } .sheet-card li::marker { color: var(--accent); } .sheet-card p { margin: 6px 0; font-size: .9rem; } .sheet-card .k { font-weight: 700; color: var(--ink); } .sheet-card code { font-family: var(--font-mono); font-size: .82em; background: var(--surface-2); border: 1px solid var(--line); padding: 0 4px; border-radius: 5px; } @media print { .topbar, .tts-player, .tts-launch { display: none; } .sheet-grid { columns: 3; } .sheet-card { box-shadow: none; } } /* ---------- Listen / read-aloud player ---------- */ .tts-player { position: fixed; right: 18px; bottom: 18px; z-index: 80; display: flex; align-items: center; gap: 6px; background: var(--surface); border: 1px solid var(--line-strong); border-radius: 999px; padding: 7px 9px; box-shadow: var(--shadow-lg); font-family: var(--font-sans); } .tts-player.collapsed { display: none; } .tts-btn { border: 0; cursor: pointer; border-radius: 999px; width: 40px; height: 40px; display: grid; place-items: center; font-size: 1rem; background: var(--surface-2); color: var(--ink); transition: transform .15s, background .2s; } .tts-btn:hover { transform: translateY(-1px); } .tts-btn.primary { background: var(--accent); color: #fff; width: 46px; height: 46px; font-size: 1.15rem; } .tts-btn.primary:hover { filter: brightness(1.05); } .tts-speed { border: 1px solid var(--line); background: var(--surface-2); color: var(--ink-soft); border-radius: 999px; font-size: .8rem; font-weight: 600; padding: 6px 8px; cursor: pointer; } .tts-voice { border: 1px solid var(--line); background: var(--surface-2); color: var(--ink-soft); border-radius: 999px; font-size: .8rem; font-weight: 600; padding: 6px 8px; cursor: pointer; max-width: 150px; text-overflow: ellipsis; } .tts-status { font-size: .78rem; color: var(--ink-faint); min-width: 54px; text-align: center; font-variant-numeric: tabular-nums; } .tts-launch { position: fixed; right: 18px; bottom: 18px; z-index: 80; width: 52px; height: 52px; border-radius: 999px; border: 0; cursor: pointer; background: var(--accent); color: #fff; font-size: 1.4rem; box-shadow: var(--shadow-lg); display: grid; place-items: center; transition: transform .15s; } @media (max-width: 640px) { .tts-launch { right: 10px; bottom: 10px; } } .tts-launch:hover { transform: translateY(-2px) scale(1.04); } /* the block currently being read aloud */ .tts-reading { scroll-margin-top: 100px; background: color-mix(in srgb, var(--accent-soft) 45%, transparent); border-radius: 6px; transition: background .4s ease; } /* the word currently being spoken — a smooth color change, no highlight box */ .tts-w { transition: color .2s ease; } .tts-w-active { color: #e11d6b; font-weight: 500; } [data-theme="dark"] .tts-w-active { color: #ff8ab6; } @media (max-width: 640px) { .tts-player { right: 10px; bottom: 10px; } } @media print { .tts-player, .tts-launch { display: none; } }