/* ───────────────────────────────────────────────────────────────────────── Fathohm — Chapter 1: The Flow Warm editorial aesthetic. Theme via [data-theme] on . ───────────────────────────────────────────────────────────────────────── */ :root, body[data-theme="paper"] { --bg: #f1ece0; --bg-deeper: #e6dfca; --bg-card: #faf6ec; --ink: #2c2a26; --ink-soft: #6b665d; --ink-faint: #a39d92; --rule: rgba(44, 42, 38, 0.14); --rule-strong: rgba(44, 42, 38, 0.32); --water: #2c5e8e; --water-soft: #6ba6c7; --water-faint: #c8dbe8; --water-deep: #1c3f60; --current: #c45a36; --current-soft: #e89972; --current-faint:#f3d5c0; --current-deep: #8a3a20; } body[data-theme="blueprint"] { --bg: #0e2540; --bg-deeper: #081a30; --bg-card: #133153; --ink: #f1ead4; --ink-soft: #b6cde2; --ink-faint: #6485a6; --rule: rgba(241, 234, 212, 0.18); --rule-strong: rgba(241, 234, 212, 0.45); --water: #7ec8e3; --water-soft: #4a9bc4; --water-faint: rgba(126, 200, 227, 0.22); --water-deep: #b9def0; --current: #f5b969; --current-soft: #d99445; --current-faint:rgba(245, 185, 105, 0.22); --current-deep: #ffd49a; } body[data-theme="botanical"] { --bg: #e8e2cf; --bg-deeper: #d4ccb2; --bg-card: #f0eada; --ink: #232618; --ink-soft: #585c47; --ink-faint: #95987f; --rule: rgba(35, 38, 24, 0.14); --rule-strong: rgba(35, 38, 24, 0.32); --water: #4d6f50; --water-soft: #84a387; --water-faint: #c8d4c5; --water-deep: #2c4a30; --current: #8a3a2f; --current-soft: #b8665a; --current-faint:#dfc0b7; --current-deep: #5c2218; } /* ─── reset / base ───────────────────────────────────────────────────────── */ *, *::before, *::after { box-sizing: border-box; } html, body { margin: 0; padding: 0; } html { scroll-behavior: smooth; } body { background: var(--bg); color: var(--ink); font-family: 'Geist', 'Söhne', ui-sans-serif, system-ui, -apple-system, sans-serif; font-size: 17px; line-height: 1.55; font-feature-settings: "ss01", "ss02", "kern"; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; transition: background 240ms ease, color 240ms ease; overflow-x: hidden; } ::selection { background: var(--current-faint); color: var(--ink); } /* ─── sitewide blueprint grid + copper texture ──────────────────────────── */ body::before { content: ""; position: fixed; inset: 0; z-index: 0; pointer-events: none; background-image: linear-gradient(to right, var(--rule) 1px, transparent 1px), linear-gradient(to bottom, var(--rule) 1px, transparent 1px); background-size: 28px 28px; opacity: 0.45; mask-image: radial-gradient(ellipse 120% 90% at 50% 0%, black 55%, transparent 100%); -webkit-mask-image: radial-gradient(ellipse 120% 90% at 50% 0%, black 55%, transparent 100%); } body[data-theme="blueprint"]::before { opacity: 0.7; } /* keep real content above the grid (topbar excluded — it owns z-index:50 + fixed below) */ .progress-rail, .chapter-nav, #root > *:not(.topbar) { position: relative; z-index: 1; } /* ─── typography ─────────────────────────────────────────────────────────── */ .serif, h1, h2, h3 { font-family: 'Newsreader', 'Iowan Old Style', 'Source Serif Pro', Georgia, serif; font-weight: 400; letter-spacing: -0.012em; } .mono, .num { font-family: 'IBM Plex Mono', 'JetBrains Mono', ui-monospace, monospace; font-feature-settings: "tnum", "zero"; } h1 { font-size: clamp(48px, 8vw, 120px); line-height: 0.96; margin: 0; } h2 { font-size: clamp(36px, 5.5vw, 76px); line-height: 1.02; margin: 0 0 0.4em; } h3 { font-size: clamp(22px, 2.4vw, 30px); line-height: 1.2; margin: 0 0 0.6em; } em, .italic { font-style: italic; } .eyebrow { font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint); font-weight: 500; } /* soldered-node bullet before section eyebrows / markers */ .section .marker::before, .beat-marker::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 9px; border-radius: 50%; background: var(--current); box-shadow: 0 0 0 2px var(--bg), 0 0 0 3px var(--current-faint); vertical-align: middle; } .lede { font-size: clamp(19px, 1.6vw, 23px); line-height: 1.5; color: var(--ink-soft); max-width: 32em; } p { margin: 0 0 1em; max-width: 36em; } /* Fact card — an emphasized "interesting fact" aside. Reuses the soldered- node dot motif (see .beat-marker::before) so it reads as a distinct, on-brand card type wherever it appears — not a one-off style. */ .fact-card { margin: 18px 0 0; padding: 16px 20px; background: var(--bg-deeper); border: 1px solid var(--rule); border-radius: 10px; } .fact-card .fact-eyebrow { display: flex; align-items: center; font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.13em; text-transform: uppercase; color: var(--current); font-weight: 600; margin-bottom: 8px; } .fact-card .fact-eyebrow::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 9px; border-radius: 50%; background: var(--current); box-shadow: 0 0 0 2px var(--bg-deeper), 0 0 0 3px var(--current-faint); flex: 0 0 auto; } .fact-card p { margin: 0; font-size: 14.5px; line-height: 1.6; color: var(--ink-soft); } .fact-card p + p { margin-top: 9px; } .fact-card b { color: var(--ink); font-weight: 600; } .note { font-style: italic; color: var(--ink-soft); font-size: 0.94em; } a { color: var(--water); text-decoration: none; border-bottom: 1px solid var(--rule); } a:hover { color: var(--water-deep); border-bottom-color: var(--water); } /* ─── depth pass — elevation tokens (theme-aware via --ink) ───────────── */ :root { --edge-hi: inset 0 1px 0 color-mix(in oklch, #ffffff 50%, transparent); --shadow-card: 0 1px 2px color-mix(in oklch, var(--ink) 9%, transparent), 0 14px 32px -22px color-mix(in oklch, var(--ink) 55%, transparent); --shadow-panel: 0 2px 5px color-mix(in oklch, var(--ink) 11%, transparent), 0 28px 60px -34px color-mix(in oklch, var(--ink) 65%, transparent); } body[data-theme="blueprint"] { --edge-hi: inset 0 1px 0 rgba(255, 255, 255, 0.08); --shadow-card: 0 2px 4px rgba(0, 0, 0, 0.30), 0 16px 38px -22px rgba(0, 0, 0, 0.85); --shadow-panel: 0 3px 8px rgba(0, 0, 0, 0.34), 0 30px 70px -34px rgba(0, 0, 0, 0.95); } /* ─── chrome ─────────────────────────────────────────────────────────────── */ .topbar { position: fixed; inset: 0 0 auto 0; z-index: 50; box-shadow: 0 10px 26px -22px color-mix(in oklch, var(--ink) 80%, transparent); padding: 13px 28px; display: flex; align-items: center; justify-content: space-between; gap: 14px; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; font-family: 'IBM Plex Mono', monospace; color: var(--ink-soft); background: color-mix(in oklch, var(--bg) 88%, transparent); -webkit-backdrop-filter: blur(9px) saturate(1.1); backdrop-filter: blur(9px) saturate(1.1); border-bottom: 1px solid var(--rule); } body[data-theme="blueprint"] .topbar { background: color-mix(in oklch, var(--bg) 84%, transparent); } /* On narrow screens, drop the chapter label so the brand + audience pill don't crowd or overlap. */ @media (max-width: 640px) { .topbar { padding: 12px 14px; gap: 10px; } .topbar > div > span { display: none; } /* breadcrumb + progress chip are redundant on phones (title is in the hero, progress lives on the dashboard) — hide them so the right cluster fits and the Explorer/Engineer toggle is never clipped off-screen. */ .topbar .crumb, .topbar .course-prog, .topbar .section-badge { display: none; } .audience-pill button { padding: 5px 10px; letter-spacing: 0.08em; } } @media (max-width: 380px) { .audience-pill button { padding: 5px 8px; font-size: 10px; } } .topbar .brand { display: flex; gap: 14px; align-items: baseline; } .topbar .brand .mark { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--current); transform: translateY(1px); } .progress-rail { position: fixed; top: 0; left: 0; right: 0; height: 2px; background: transparent; z-index: 60; } .progress-rail > div { height: 100%; width: 0; background: var(--current); transition: width 80ms linear; } .chapter-nav { position: fixed; right: 32px; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 10px; z-index: 40; font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.06em; } .chapter-nav a { border: none; color: var(--ink-faint); display: flex; align-items: center; gap: 10px; cursor: pointer; transition: color 160ms ease; } .chapter-nav a::before { content: ""; display: block; width: 16px; height: 1px; background: var(--ink-faint); transition: width 160ms ease, background 160ms ease; } .chapter-nav a:hover, .chapter-nav a.active { color: var(--ink); } .chapter-nav a.active::before { width: 28px; background: var(--current); } .chapter-nav a .label { opacity: 0; transition: opacity 160ms ease; } .chapter-nav a:hover .label, .chapter-nav a.active .label { opacity: 1; } @media (max-width: 1240px) { .chapter-nav { display: none; } } /* ─── course map dropdown (top bar, every page) ─────────────────────────── */ .coursemenu { position: relative; margin-left: 6px; } .cm-btn { display: inline-flex; align-items: center; gap: 8px; appearance: none; cursor: pointer; background: var(--bg-card); color: var(--ink); border: 1.5px solid var(--rule-strong); border-radius: 8px; padding: 6px 12px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; transition: border-color 140ms ease, background 140ms ease; } .cm-btn:hover { border-color: var(--current); } .cm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; width: 13px; height: 13px; } .cm-grid span { background: var(--current); border-radius: 1px; } @media (max-width: 600px) { .cm-btn-label { display: none; } } .cm-scrim { position: fixed; inset: 0; z-index: 65; } .cm-map-link { grid-column: 1 / -1; margin-top: 2px; padding: 9px 10px 4px; border-top: 1px solid var(--rule); text-decoration: none; font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; letter-spacing: 0.05em; color: var(--current); } .cm-map-link:hover { color: var(--current-deep); } .cm-map-link.cm-feedback { border-top: none; padding-top: 2px; color: var(--ink-faint); } .cm-map-link.cm-feedback:hover { color: var(--ink-soft); } .cm-panel { position: absolute; top: calc(100% + 10px); left: 0; z-index: 66; width: min(620px, 90vw); display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; background: var(--bg); border: 1px solid var(--rule-strong); border-radius: 12px; padding: 16px; box-shadow: 0 24px 60px -30px var(--ink); max-height: calc(100vh - 80px); overflow-y: auto; animation: cm-pop 150ms ease; } @keyframes cm-pop { from { opacity: 0; transform: translateY(-6px); } } @media (max-width: 640px) { .cm-panel { grid-template-columns: 1fr; max-height: 70vh; overflow-y: auto; } } .cm-group { display: flex; flex-direction: column; } .cm-tag { font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--bg-card); padding: 5px 8px; border-radius: 5px; margin-bottom: 8px; align-self: flex-start; } .cm-tag.l0 { background: var(--water); } .cm-tag.l1 { background: var(--ink); } .cm-tag.l2 { background: var(--current); } .cm-tag.pj { background: var(--current-deep); } .cm-group-wide { grid-column: 1 / -1; margin-top: 4px; padding-top: 10px; border-top: 1px solid var(--rule); } .cm-links { display: flex; flex-direction: column; gap: 1px; } .cm-links a { display: flex; align-items: center; gap: 7px; border: none; border-radius: 6px; padding: 7px 9px; font-size: 13.5px; color: var(--ink-soft); transition: background 120ms ease, color 120ms ease; } .cm-links a:hover { background: var(--bg-deeper); color: var(--ink); } .cm-links a.here { background: color-mix(in oklch, var(--current) 14%, transparent); color: var(--ink); } .cm-link-t { flex: 1; } .cm-check { color: var(--water); font-weight: 700; font-size: 12px; } .cm-you { font-family: 'IBM Plex Mono', monospace; font-size: 8.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--current); background: var(--bg-card); padding: 2px 5px; border-radius: 4px; border: 1px solid var(--current); } @media print { .coursemenu { display: none; } } /* ─── breadcrumb in topbar ──────────────────────────────────────────────── */ .section-badge { font-family: 'IBM Plex Mono', monospace; font-size: 12px; font-weight: 600; letter-spacing: 0.06em; color: var(--bg-card); background: var(--current); padding: 3px 9px; border-radius: 5px; position: relative; } .section-badge::before { content: ""; position: absolute; left: -2px; top: 50%; width: 4px; height: 11px; transform: translateY(-50%); background: var(--current-deep); border-radius: 0 2px 2px 0; } .crumb { display: inline-flex; align-items: baseline; gap: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); } .crumb a { border: none; color: var(--ink-faint); } .crumb a:hover { color: var(--ink); } .crumb-sep { color: var(--ink-faint); opacity: 0.7; } .crumb-lvl { color: var(--ink-faint); } .crumb-cur { color: var(--current); } @media (max-width: 720px) { .crumb a, .crumb-lvl, .crumb-sep:first-of-type { display: none; } } /* ─── audience toggle in topbar ──────────────────────────────────────────── */ .audience-pill { display: inline-flex; background: var(--bg-card); border: 1px solid var(--rule-strong); border-radius: 999px; padding: 2px; pointer-events: auto; } .audience-pill button { appearance: none; border: none; background: transparent; color: var(--ink-soft); font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; padding: 5px 12px; border-radius: 999px; cursor: pointer; font-weight: 500; transition: background 160ms ease, color 160ms ease; } .audience-pill button.active { background: var(--current); color: var(--bg-card); } /* ─── always-visible course progress chip ──────────────────────────── */ .course-prog { display: inline-flex; align-items: center; gap: 7px; padding: 3px 11px 3px 4px; border: 1px solid var(--rule-strong); border-radius: 999px; border-bottom: 1px solid var(--rule-strong); background: var(--bg-card); color: inherit; text-decoration: none; pointer-events: auto; transition: border-color 140ms ease; } .course-prog:hover { border-color: var(--current); } .course-prog svg { display: block; } .cp-text { font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; letter-spacing: 0.03em; color: var(--ink-soft); display: inline-flex; align-items: baseline; gap: 5px; } .cp-text b { color: var(--ink); font-weight: 600; } .cp-text i { font-style: normal; color: var(--current); } @media (max-width: 760px) { .cp-text i { display: none; } } @media (max-width: 560px) { .course-prog { padding: 3px; } .cp-text { display: none; } } /* ─── "Expand your Beacon" hook at the end of each chapter ────────────────── */ .wn-beacon { display: flex; align-items: center; gap: 18px; margin-top: 30px; padding: 18px 22px; border: 1px solid var(--current); border-radius: 12px; background: color-mix(in oklch, var(--current) 6%, var(--bg-card)); text-decoration: none; color: inherit; border-bottom: 1px solid var(--current); transition: box-shadow 200ms ease, transform 200ms ease; } .wn-beacon:hover { transform: translateY(-2px); box-shadow: var(--edge-hi), 0 14px 36px -24px var(--current); } .wn-beacon { box-shadow: var(--edge-hi), var(--shadow-card); } .wn-beacon-icon { flex: 0 0 auto; display: flex; } .wn-beacon-text { flex: 1 1 auto; display: flex; flex-direction: column; gap: 3px; } .wn-beacon-tag { font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--current); } .wn-beacon-title { font-size: 17px; color: var(--ink); } .wn-beacon-title em { font-style: italic; } .wn-beacon-go { flex: 0 0 auto; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); white-space: nowrap; } @media (max-width: 560px) { .wn-beacon { flex-wrap: wrap; gap: 12px; } } /* ─── chapter strip (footer band) ────────────────────────────────────────── */ .chapter-strip { display: flex; flex-wrap: wrap; gap: 6px; padding: 12px 14px; border: 1px solid var(--rule); border-radius: 999px; background: var(--bg-card); margin-bottom: 28px; align-self: flex-start; } .chapter-strip a { display: inline-flex; align-items: baseline; gap: 8px; padding: 6px 14px; border-radius: 999px; color: var(--ink-faint); font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.06em; transition: background 160ms ease, color 160ms ease; } .chapter-strip a:hover { color: var(--ink); background: var(--bg-deeper); } .chapter-strip a.current { background: var(--current); color: var(--bg-card); } .chapter-strip .num { opacity: 0.6; font-size: 10px; letter-spacing: 0.14em; } .chapter-strip a.current .num { opacity: 0.85; } .chapter-strip .title { font-style: italic; } .chapter-strip a.done { color: var(--ink); } .chapter-strip a.done::before { content: ""; } .chapter-strip .check { margin-left: 4px; color: var(--water); font-weight: 700; font-size: 11px; } .chapter-strip a.current .check { color: var(--bg-card); } /* ─── cover-page (sits ABOVE the sticky grid, full-bleed) ─────────────── */ .cover-page { position: relative; min-height: 100vh; padding: 8vh 6vw 8vh; overflow: hidden; border-bottom: 1px solid var(--rule); display: flex; align-items: center; } .cover-inner { position: relative; width: 100%; max-width: 1180px; margin: 0 auto; } .cover-title { font-size: clamp(56px, 9vw, 132px); line-height: 0.94; letter-spacing: -0.015em; margin: 0; } .cover-lede { max-width: 36em; font-size: clamp(19px, 1.6vw, 23px); line-height: 1.5; color: var(--ink-soft); margin-top: 6px; } /* "Previously" recap card on a chapter cover — a landing spot for returning learners */ .cover-recap { display: block; margin-top: 30px; max-width: 40em; padding: 15px 18px; border: 1px solid var(--rule); border-left: 3px solid var(--current); border-radius: 10px; background: color-mix(in oklch, var(--bg-card) 70%, transparent); text-decoration: none; transition: border-color 140ms ease, transform 140ms ease; } .cover-recap:hover { border-color: var(--current); transform: translateY(-1px); } .cover-recap-tag { display: block; font-family: 'IBM Plex Mono', monospace; font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--current); margin-bottom: 5px; } .cover-recap-text { display: block; font-size: 15.5px; line-height: 1.5; color: var(--ink-soft); } .cover-recap-go { display: inline-block; margin-top: 7px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--ink-faint); } .cover-recap:hover .cover-recap-go { color: var(--current); } /* hierarchy label above the secondary "paths from here" cards in WhatsNext */ .wn-more-label { margin-top: 34px; margin-bottom: 2px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); } .wn-more-label + .wn-beacon { margin-top: 12px; } .cover-cta { margin-top: 56px; display: flex; gap: 14px; } .arrow-link { display: inline-flex; align-items: center; gap: 10px; border: 2px solid var(--current-deep) !important; background: var(--current); color: var(--bg-card) !important; padding: 13px 26px; border-radius: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 500; transition: transform 120ms ease, box-shadow 120ms ease; } .arrow-link:hover { transform: translateY(-2px); box-shadow: 0 8px 0 -2px var(--current-deep), 0 12px 22px -12px var(--current); } .arrow-glyph { font-family: serif; font-size: 14px; line-height: 1; } /* ─── unified CTA buttons ─────────────────────────────────────────────── */ /* ─── unified CTA buttons ─────────────────────────────────────────────── */ /* ─── chunkier "chip" CTA buttons ─────────────────────────────────────── */ .cta { display: inline-flex; align-items: center; gap: 8px; padding: 13px 24px; border-radius: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500; border: 2px solid var(--rule-strong); transition: transform 120ms ease, box-shadow 120ms ease; position: relative; } /* solder-pad notches on the leading edge — reads like an IC pin */ .cta::before { content: ""; position: absolute; left: -2px; top: 50%; width: 5px; height: 14px; transform: translateY(-50%); border-radius: 0 3px 3px 0; background: currentColor; opacity: 0.55; } .cta-primary { background: var(--current); color: var(--bg-card) !important; border-color: var(--current-deep); } .cta-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 0 -2px var(--current-deep), 0 12px 22px -12px var(--current); } .cta-secondary { background: var(--bg-card); color: var(--ink) !important; } .cta-secondary:hover { transform: translateY(-2px); box-shadow: 0 8px 0 -2px var(--rule-strong); } /* ─── predict-then-reveal ────────────────────────────────────────────── */ .predict-reveal { background: var(--bg-card); border: 1px solid var(--rule-strong); border-radius: 8px; padding: 22px 24px; margin: 32px 0; } .predict-q { font-family: 'Newsreader', serif; font-size: 22px; line-height: 1.3; font-style: italic; margin: 12px 0 18px; max-width: 40em; } .predict-opts { display: flex; flex-direction: column; gap: 8px; } .predict-opts button { appearance: none; background: transparent; border: 1px solid var(--rule); border-radius: 6px; text-align: left; padding: 12px 14px; font-family: 'Geist', system-ui, sans-serif; font-size: 16px; color: var(--ink); cursor: pointer; display: flex; align-items: baseline; gap: 12px; transition: background 120ms ease, border-color 120ms ease; } .predict-opts button:hover:not(:disabled) { background: var(--bg-deeper); border-color: var(--rule-strong); } .predict-opts button .letter { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-faint); border: 1px solid var(--rule-strong); padding: 3px 7px; border-radius: 4px; flex: 0 0 auto; } .predict-opts button.correct { background: color-mix(in oklch, var(--water) 12%, transparent); border-color: var(--water); } .predict-opts button.correct .letter { color: var(--water); border-color: var(--water); } .predict-opts button.wrong { background: color-mix(in oklch, var(--current) 8%, transparent); border-color: var(--current-soft); opacity: 0.75; } .predict-opts button.reveal-correct { background: color-mix(in oklch, var(--water) 8%, transparent); border-color: var(--water-soft); } .predict-opts button:disabled { cursor: default; } .predict-explain { margin-top: 16px; font-size: 15px; line-height: 1.55; color: var(--ink-soft); border-left: 2px solid var(--water); padding-left: 14px; } .predict-explain.wrong { border-left-color: var(--current); } /* ─── ch2 branch readouts + live total ───────────────────────────────────── */ .branch-readout { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; font-size: 12px; color: var(--ink-soft); padding: 4px 2px 10px; border-bottom: 1px dotted var(--rule); margin-bottom: 8px; } .branch-readout .mono { font-size: 12px; } .total-calc { margin-top: 18px; border: 2px solid var(--current); border-radius: 8px; background: var(--bg-card); padding: 16px 18px; } .predict-explain strong { color: var(--ink); } /* ─── chapter quiz ───────────────────────────────────────────────────── */ .quiz-section { border-bottom: 1px solid var(--rule); } .quiz-list { display: flex; flex-direction: column; gap: 28px; margin: 32px 0; } .quiz-q { background: var(--bg-card); border: 1px solid var(--rule); border-radius: 8px; padding: 22px 24px; box-shadow: var(--edge-hi), var(--shadow-card); } .quiz-q-num { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 10px; } .quiz-q-text { font-family: 'Newsreader', serif; font-size: 23px; line-height: 1.3; font-style: italic; margin: 0 0 18px; max-width: none; } .quiz-opts { display: flex; flex-direction: column; gap: 8px; } .quiz-opts button { appearance: none; background: transparent; border: 1px solid var(--rule); border-radius: 6px; text-align: left; padding: 12px 14px; font-family: 'Geist', system-ui, sans-serif; font-size: 16px; color: var(--ink); cursor: pointer; display: flex; align-items: center; gap: 12px; transition: background 120ms ease, border-color 120ms ease; } .quiz-opts button:hover:not(:disabled) { background: var(--bg-deeper); border-color: var(--rule-strong); } .quiz-opts button .letter { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.14em; color: var(--ink-faint); border: 1px solid var(--rule-strong); padding: 3px 7px; border-radius: 4px; flex: 0 0 auto; } .quiz-opts button .tick, .quiz-opts button .cross { margin-left: auto; font-weight: 700; } .quiz-opts button .tick { color: var(--water); } .quiz-opts button .cross { color: var(--current); } .quiz-opts button.picked { background: var(--bg-deeper); border-color: var(--ink-faint); } .quiz-opts button.picked .letter { color: var(--ink); border-color: var(--ink-faint); } .quiz-opts button.correct { background: color-mix(in oklch, var(--water) 12%, transparent); border-color: var(--water); } .quiz-opts button.correct .letter { color: var(--water); border-color: var(--water); } .quiz-opts button.wrong { background: color-mix(in oklch, var(--current) 9%, transparent); border-color: var(--current-soft); } .quiz-opts button.wrong .letter { color: var(--current); border-color: var(--current-soft); } .quiz-opts button:disabled { cursor: default; } .quiz-explain { margin-top: 14px; font-size: 15px; line-height: 1.55; color: var(--ink-soft); border-left: 2px solid var(--water); padding-left: 14px; } .quiz-explain.wrong { border-left-color: var(--current); } .quiz-actions { display: flex; } .quiz-submit, .quiz-retry { appearance: none; border: 1px solid var(--current); background: var(--current); color: var(--bg-card); padding: 13px 26px; border-radius: 999px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; cursor: pointer; transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease; } .quiz-submit:hover:not(:disabled), .quiz-retry:hover { transform: translateY(-1px); box-shadow: 0 6px 18px -8px var(--current); } .quiz-submit:disabled { background: transparent; color: var(--ink-faint); border-color: var(--rule-strong); cursor: default; } .quiz-retry { background: transparent; color: var(--ink); border-color: var(--rule-strong); } .quiz-result { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; background: var(--bg-card); border: 1px solid var(--rule-strong); border-radius: 10px; padding: 26px 28px; margin-top: 8px; } .quiz-result.passed { border-color: var(--water); } .quiz-result.review { border-color: var(--current-soft); } .quiz-score { display: flex; flex-direction: column; align-items: center; flex: 0 0 auto; min-width: 120px; } .quiz-score-num { font-family: 'Newsreader', serif; font-size: 56px; line-height: 1; font-style: italic; } .quiz-score-den { font-size: 26px; color: var(--ink-faint); } .quiz-score-pct { font-family: 'IBM Plex Mono', monospace; font-size: 13px; letter-spacing: 0.14em; color: var(--ink-soft); margin-top: 6px; } .quiz-verdict { flex: 1 1 280px; font-size: 16px; line-height: 1.55; color: var(--ink-soft); } .quiz-verdict strong { color: var(--ink); } /* ─── section layout ─────────────────────────────────────────────────────── */ .section { position: relative; min-height: 100vh; padding: 14vh 8vw 9vh; display: flex; flex-direction: column; justify-content: center; border-bottom: 1px solid var(--rule); overflow: hidden; } .section .marker { position: absolute; top: 6vh; left: 8vw; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint); } /* ─── practice problems (numeric drills) ─────────────────────────────────── */ .practice .lede { margin-bottom: 8px; } .practice-head { display: flex; align-items: center; justify-content: space-between; gap: 16px 24px; flex-wrap: wrap; } .practice-tools { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; } .pp-reroll { appearance: none; cursor: pointer; height: 34px; padding: 0 14px; border: 1px solid var(--rule-strong); border-radius: 999px; background: transparent; color: var(--ink-soft); font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.04em; transition: all 140ms ease; } .pp-reroll:hover { border-color: var(--current); color: var(--current); } .pp-prehint { margin: 2px 0 0; font-size: 13.5px; color: var(--water); font-style: italic; background: color-mix(in oklch, var(--water) 7%, transparent); padding: 8px 12px; border-radius: 7px; } /* difficulty segmented control */ .diff-toggle { display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; } .diff-label { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); } .diff-seg { display: inline-flex; background: var(--bg-card); border: 1px solid var(--rule-strong); border-radius: 999px; padding: 2px; } .diff-seg button { appearance: none; border: none; cursor: pointer; background: transparent; font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; letter-spacing: 0.03em; padding: 5px 13px; border-radius: 999px; color: var(--ink-soft); transition: background 150ms ease, color 150ms ease; } .diff-toggle.compact .diff-seg button { padding: 4px 11px; font-size: 11px; } .diff-seg button.active { background: var(--current); color: var(--bg-card); } .diff-blurb { font-size: 12.5px; color: var(--ink-faint); font-style: italic; min-width: 0; } .pp-list { display: grid; gap: 16px; margin-top: 28px; } .pp-item { background: var(--bg-card); border: 1px solid var(--rule); border-radius: 10px; padding: 20px 22px; box-shadow: var(--edge-hi), var(--shadow-card); border-left: 3px solid var(--rule-strong); transition: border-color 180ms ease; } .pp-item.ok { border-left-color: var(--current); } .pp-item.no { border-left-color: color-mix(in oklch, #c0392b 70%, var(--rule-strong)); } .pp-q { display: flex; gap: 12px; align-items: baseline; } .pp-n { font-size: 12px; color: var(--ink-faint); flex: 0 0 auto; padding-top: 2px; } .pp-q-text { font-family: 'Newsreader', serif; font-size: 21px; line-height: 1.35; color: var(--ink); } .pp-q-text sub { font-size: 0.72em; } .pp-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 16px; padding-left: 24px; } .pp-input { display: inline-flex; align-items: center; gap: 6px; border: 1.5px solid var(--rule-strong); border-radius: 8px; background: var(--bg); padding: 0 12px; height: 42px; } .pp-input:focus-within { border-color: var(--water); } .pp-input input { appearance: none; border: none; background: transparent; outline: none; font-family: 'IBM Plex Mono', monospace; font-size: 16px; color: var(--ink); width: 110px; height: 100%; } .pp-unit { font-family: 'IBM Plex Mono', monospace; font-size: 14px; color: var(--ink-faint); } .pp-check, .pp-soltoggle { appearance: none; cursor: pointer; height: 42px; padding: 0 18px; border-radius: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; } .pp-check { border: none; background: var(--current); color: var(--bg-card); } .pp-check:disabled { background: var(--bg-deeper); color: var(--ink-faint); cursor: not-allowed; } .pp-soltoggle { border: 1px solid var(--rule-strong); background: transparent; color: var(--ink-soft); } .pp-soltoggle:hover { border-color: var(--ink-soft); } .pp-verdict { margin: 12px 0 0 24px; font-size: 15px; line-height: 1.5; color: var(--ink-soft); } .pp-verdict.ok { color: var(--current); font-weight: 500; } .pp-hint { color: var(--ink-faint); font-style: italic; } .pp-solution { margin: 14px 0 0 24px; padding: 14px 16px; border-radius: 8px; background: var(--bg-deeper); display: grid; gap: 6px; } .pp-sol-tag { font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); } .pp-sol-body { font-size: 15.5px; line-height: 1.55; color: var(--ink); } .pp-sol-body sub { font-size: 0.72em; } .pp-answer { font-size: 14px; color: var(--current); } .pp-foot { margin-top: 20px; font-size: 14px; color: var(--ink-faint); font-style: italic; } .pp-foot a { color: var(--water); } .section-inner { width: 100%; max-width: 1280px; margin: 0 auto; } .two-col { display: grid; grid-template-columns: minmax(280px, 1fr) 1.4fr; gap: clamp(32px, 5vw, 80px); align-items: center; } @media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } } /* ─── cards / panels ─────────────────────────────────────────────────────── */ .card { background: var(--bg-card); border: 1px solid var(--rule); border-radius: 4px; padding: 24px; box-shadow: var(--edge-hi), var(--shadow-card); } .stage { background: var(--bg-card); border: 1px solid var(--rule); border-radius: 6px; padding: 28px; position: relative; box-shadow: var(--edge-hi), var(--shadow-card); } .stage-label { position: absolute; top: 14px; left: 18px; font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); } /* ─── sliders ────────────────────────────────────────────────────────────── */ .ctrl { display: flex; flex-direction: column; gap: 8px; padding: 14px 0; } .ctrl-head { display: flex; justify-content: space-between; align-items: baseline; } .ctrl-name { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft); } .ctrl-val { font-family: 'Newsreader', serif; font-size: 28px; line-height: 1; font-style: italic; } .ctrl-val .unit { font-style: normal; font-size: 14px; margin-left: 4px; color: var(--ink-faint); font-family: 'IBM Plex Mono', monospace; } .range { -webkit-appearance: none; appearance: none; width: 100%; height: 2px; background: var(--rule-strong); outline: none; cursor: pointer; } .range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--ink); border: 3px solid var(--bg-card); box-shadow: 0 0 0 1px var(--rule-strong); cursor: grab; } .range::-webkit-slider-thumb:active { cursor: grabbing; } .range::-moz-range-thumb { width: 20px; height: 20px; border-radius: 50%; background: var(--ink); border: 3px solid var(--bg-card); box-shadow: 0 0 0 1px var(--rule-strong); } .range.range-water::-webkit-slider-thumb { background: var(--water); } .range.range-water::-moz-range-thumb { background: var(--water); } .range.range-current::-webkit-slider-thumb { background: var(--current); } .range.range-current::-moz-range-thumb { background: var(--current); } /* ─── badge / chip ───────────────────────────────────────────────────────── */ .chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border: 1px solid var(--rule-strong); border-radius: 999px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.06em; color: var(--ink-soft); align-self: flex-start; } .chip.water { color: var(--water); border-color: var(--water); } .chip.current { color: var(--current); border-color: var(--current); } /* ─── equation block ─────────────────────────────────────────────────────── */ .eq { font-family: 'Newsreader', serif; font-style: italic; font-size: clamp(48px, 7vw, 96px); line-height: 1; display: inline-flex; align-items: baseline; gap: 0.18em; } .eq .op { font-style: normal; color: var(--ink-faint); } .eq .num { font-style: normal; font-family: 'IBM Plex Mono', monospace; } .eq .V { color: var(--water); } .eq .I { color: var(--current); } .eq .R { color: var(--ink); } /* stacked fraction (e.g. V/R) — bar gets breathing room so numerator and denominator never touch it */ .eq .frac { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; line-height: 1; vertical-align: middle; } .eq .frac > .top { padding: 0 0.32em 0.12em; } .eq .frac > .bot { padding: 0.12em 0.32em 0; } /* fallback for fracs whose children carry no .top/.bot classes */ .eq .frac > :first-child:not(.bar) { padding: 0 0.32em 0.14em; } .eq .frac > :last-child:not(.bar) { padding: 0.14em 0.32em 0; } .eq .frac > .bar { width: 100%; height: 0; border-top: 0.055em solid var(--ink-faint); } .kbd { display: inline-block; padding: 1px 8px; border: 1px solid var(--rule-strong); border-bottom-width: 2px; border-radius: 4px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--ink-soft); } /* ─── water + circuit flow ───────────────────────────────────────────────── */ .flow-anim { stroke-dasharray: 6 10; animation: flow-march var(--flow-period, 1.4s) linear infinite; } @keyframes flow-march { to { stroke-dashoffset: -160; } } /* Drifting sine streaks — the water-current texture inside pipes. The 56px translate MUST equal WATER_WAVELENGTH in visuals.jsx so each loop lands exactly one wavelength along and repeats seamlessly. */ .water-drift { animation: water-drift var(--flow-period, 1.4s) linear infinite; } @keyframes water-drift { to { transform: translateX(56px); } } .flow-particle { animation: particle-march var(--flow-period, 1.4s) linear infinite; } @keyframes particle-march { from { offset-distance: 0%; } to { offset-distance: 100%; } } .pulse-glow { animation: pulse-glow 1.6s ease-in-out infinite; } @keyframes pulse-glow { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } } /* ─── hero scribbles ─────────────────────────────────────────────────────── */ .hero-grid { position: absolute; inset: 0; pointer-events: none; opacity: 0.32; background-image: linear-gradient(to right, var(--rule) 1px, transparent 1px), linear-gradient(to bottom, var(--rule) 1px, transparent 1px); background-size: 64px 64px; mask-image: radial-gradient(ellipse 70% 60% at 60% 50%, black 30%, transparent 80%); -webkit-mask-image: radial-gradient(ellipse 70% 60% at 60% 50%, black 30%, transparent 80%); } body[data-theme="blueprint"] .hero-grid { opacity: 0.5; } /* ─── divider rule ──────────────────────────────────────────────────────── */ .rule { display: flex; align-items: center; gap: 12px; color: var(--ink-faint); font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; margin: 36px 0; } .rule::before, .rule::after { content: ""; flex: 1; height: 1px; background: var(--rule); } /* ─── pull quote / marginalia ───────────────────────────────────────────── */ .pull { font-family: 'Newsreader', serif; font-style: italic; font-size: clamp(24px, 2.6vw, 34px); line-height: 1.25; color: var(--ink); border-left: 2px solid var(--current); padding-left: 22px; margin: 28px 0; max-width: 26em; } .marg { font-family: 'Newsreader', serif; font-style: italic; font-size: 14px; color: var(--ink-soft); line-height: 1.45; max-width: 22em; } /* hairline arrow */ .arrow { display: inline-flex; align-items: center; gap: 6px; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-soft); } .arrow::after { content: "→"; font-family: serif; font-size: 16px; } /* ─── lesson scrollytelling ──────────────────────────────────────────────── */ /* stacked, self-contained lesson sections (each owns its own visual) */ .lesson-stack { display: flex; flex-direction: column; } .lesson-stack > * + * { border-top: 1px solid var(--rule); } .lesson-stack > .lesson { padding-top: 4vh; padding-bottom: 4vh; } .lesson-solo { width: 100%; max-width: 1480px; margin: 0 auto; padding: 0 6vw; } .lesson-solo .beat { min-height: auto; padding: 8vh 0; max-width: 900px; margin: 0 auto; border-top: none; justify-content: flex-start; } .lesson { position: relative; max-width: 1480px; margin: 0 auto; padding: 9vh 6vw 6vh; display: grid; grid-template-columns: minmax(340px, 1fr) minmax(440px, 1.15fr); gap: clamp(40px, 5vw, 88px); align-items: start; } .lesson-scroll { display: flex; flex-direction: column; } .beat { min-height: 92vh; display: flex; flex-direction: column; justify-content: center; padding: 6vh 0; border-top: 1px solid var(--rule); position: relative; } .beat:first-child { border-top: none; padding-top: 0; min-height: 88vh; } .beat .beat-marker { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 26px; } .beat-cover h1 { font-size: clamp(48px, 7vw, 104px); line-height: 0.96; } .beat-cover .hero-grid { position: absolute; inset: 0; } .lesson-sticky { position: sticky; top: 6vh; display: flex; flex-direction: column; gap: 14px; align-self: start; height: 88vh; } .lesson-sticky[data-single="1"] .vis-block { flex: 1 1 0; } .vis-block { background: var(--bg-card); border: 1px solid var(--rule); border-radius: 6px; padding: 14px 18px 10px; position: relative; flex: 1 1 0; min-height: 0; display: flex; flex-direction: column; box-shadow: var(--edge-hi), var(--shadow-panel); } .vis-block .stage-label { position: static; margin-bottom: 4px; } .vis-block svg { flex: 1; min-height: 0; } .vis-readout { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; } .vis-readout > div { background: var(--bg-card); padding: 12px 14px; display: flex; flex-direction: column; gap: 4px; } .vis-readout .ro-name { font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); } .vis-readout .ro-val { font-family: 'Newsreader', serif; font-style: italic; font-size: clamp(22px, 2vw, 28px); line-height: 1; } .vis-readout .ro-unit { font-family: 'IBM Plex Mono', monospace; font-style: normal; font-size: 11px; color: var(--ink-faint); margin-left: 2px; } .vis-readout .ro-v .ro-val { color: var(--water); } .vis-readout .ro-i .ro-val { color: var(--current); } .vis-readout .ro-active { background: var(--bg-deeper); } /* highlight per-mode */ .lesson[data-mode="voltage"] .vis-readout .ro-v { background: var(--bg-deeper); } .lesson[data-mode="resistance"] .vis-readout .ro-r { background: var(--bg-deeper); } .lesson[data-mode="current"] .vis-readout .ro-i { background: var(--bg-deeper); } .lesson[data-mode="playground"] .vis-readout .ro-p { background: var(--bg-deeper); } @media (max-width: 1100px) { /* minmax(0,1fr) (not bare 1fr) so the single column can shrink BELOW its children's min-content — otherwise a non-wrapping child (the 4-up readout row, a wide SVG) forces the column wider than the viewport and clips every line on narrow phones (~360px). min-width:0 on the items is the partner fix. */ .lesson { grid-template-columns: minmax(0, 1fr); padding: 0 5vw; } .lesson-scroll, .lesson-sticky { min-width: 0; } .lesson-sticky { order: -1; position: sticky; /* clear the fixed topbar (measured into --topbar-h) so the scene tabs at the panel's top don't tuck up behind the bar when it pins */ top: var(--topbar-h, 52px); height: auto; max-height: none; z-index: 5; background: var(--bg); padding: 8px 0 10px; border-bottom: 1px solid var(--rule); gap: 8px; } /* On mobile only ONE animation fits — default to the water scene and let the VisTabs switcher flip to the second block. (Sibling selector, not nth-of-type: the tabs div must not shift the count.) */ .lesson-sticky .vis-block { flex: 0 0 auto; } .lesson-sticky:not([data-vis-tab="1"]) .vis-block ~ .vis-block { display: none; } .lesson-sticky[data-vis-tab="1"] .vis-block:has(~ .vis-block) { display: none; } .lesson-sticky .vis-tabs { display: flex; } .lesson-sticky .vis-block svg { max-height: 30vh !important; height: auto !important; } .vis-block { padding: 4px 8px 3px; } .vis-block .stage-label { font-size: 9px; margin-bottom: 2px; } /* compact single-row readout so the pinned panel leaves most of the screen to the prose + sliders (it was eating ~2/3 of a phone viewport) */ .vis-readout { flex: 0 0 auto; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; } .vis-readout > div { padding: 5px 8px; } .vis-readout .ro-name { font-size: 8.5px; letter-spacing: 0.08em; } .vis-readout .ro-val { font-size: 17px; } .vis-readout .ro-unit { font-size: 10px; } .beat { min-height: auto; padding: 7vh 0; } } @media (max-width: 1100px) { /* Mobile note that the circuit view is hidden */ .mobile-anim-note { display: block; } } .mobile-anim-note { display: none; } /* mobile scene tabs — base hidden; the max-width:1100px block above shows them via the more-specific .lesson-sticky .vis-tabs (a bare .vis-tabs rule here would win on source order and keep them hidden forever) */ .vis-tabs { display: none; gap: 6px; } .vis-tabs button { appearance: none; flex: 1; border: 1.5px solid var(--rule-strong); background: transparent; color: var(--ink-soft); padding: 7px 10px; border-radius: 6px; cursor: pointer; font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; font-weight: 500; } .vis-tabs button.on { border-color: var(--ink); background: var(--ink); color: var(--bg-card); } /* ─── glossary floating button + slide-over ─────────────────────────────── */ .fab-stack { position: fixed; right: 18px; bottom: 18px; z-index: 60; display: flex; flex-direction: column; gap: 10px; align-items: flex-end; } .fab-stack .glossary-fab { position: static; right: auto; bottom: auto; } .feedback-fab { display: inline-flex; align-items: center; gap: 8px; background: var(--bg-card); color: var(--ink); border: 1.5px solid var(--rule-strong); border-radius: 999px; padding: 9px 15px 9px 11px; cursor: pointer; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; box-shadow: 0 6px 20px -10px var(--ink); transition: transform 140ms ease, border-color 140ms ease; } .feedback-fab:hover { transform: translateY(-2px); border-color: var(--current); } .feedback-fab .gf-q { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; border-radius: 50%; background: var(--current); color: var(--bg-card); font-weight: 700; font-size: 12px; } @media (max-width: 600px) { .feedback-fab .gf-label { display: none; } } .feedback-panel .fb-body { padding: 6px 22px 24px; display: flex; flex-direction: column; gap: 14px; } .fb-lead { font-size: 15px; color: var(--ink-soft); line-height: 1.55; margin: 0; max-width: none; } .fb-text { width: 100%; resize: vertical; min-height: 130px; box-sizing: border-box; font-family: 'Geist', system-ui, sans-serif; font-size: 15px; line-height: 1.5; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--rule-strong); background: var(--bg); color: var(--ink); } .fb-text:focus { outline: none; border-color: var(--current); } .fb-send { appearance: none; cursor: pointer; align-self: flex-start; font-family: 'IBM Plex Mono', monospace; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; padding: 11px 18px; border-radius: 9px; border: none; background: var(--current); color: var(--bg-card); } .fb-send:disabled { background: var(--bg-deeper); color: var(--ink-faint); cursor: not-allowed; } .fb-form { font-size: 13px; color: var(--water); border: none; align-self: flex-start; } .fb-note { font-size: 12.5px; color: var(--ink-faint); font-style: italic; margin: 0; } @media print { .fab-stack { display: none; } } .search-fab { display: inline-flex; align-items: center; gap: 8px; background: var(--bg-card); color: var(--ink); border: 1.5px solid var(--rule-strong); border-radius: 999px; padding: 9px 15px 9px 11px; cursor: pointer; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; box-shadow: 0 6px 20px -10px var(--ink); transition: transform 140ms ease, border-color 140ms ease; } .search-fab:hover { transform: translateY(-2px); border-color: var(--current); } .search-fab .gf-q { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; border-radius: 50%; background: var(--ink); color: var(--bg-card); font-size: 13px; } @media (max-width: 600px) { .search-fab .gf-label { display: none; } } /* ─── sound toggle fab + narration ───────────────────────────────────────── */ .sound-fab { display: inline-flex; align-items: center; gap: 8px; background: var(--bg-card); color: var(--ink); border: 1.5px solid var(--rule-strong); border-radius: 999px; padding: 9px 15px 9px 11px; cursor: pointer; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; box-shadow: 0 6px 20px -10px var(--ink); transition: transform 140ms ease, border-color 140ms ease, background 140ms ease; } .sound-fab:hover { transform: translateY(-2px); border-color: var(--current); } .sound-fab .gf-q { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; border-radius: 50%; background: var(--ink); color: var(--bg-card); font-size: 12px; } .sound-fab.on { border-color: var(--current); } .sound-fab.on .gf-q { background: var(--current); } @media (max-width: 600px) { .sound-fab .gf-label { display: none; } } .narrate-btn { display: inline-flex; align-items: center; gap: 7px; background: transparent; color: var(--current); border: 1px solid color-mix(in oklch, var(--current) 45%, transparent); border-radius: 999px; padding: 5px 13px; cursor: pointer; font-family: 'IBM Plex Mono', monospace; font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; transition: background 140ms ease, color 140ms ease; } .narrate-btn:hover { background: color-mix(in oklch, var(--current) 10%, transparent); } .narrate-btn.on { background: var(--current); color: var(--bg-card); border-color: var(--current); } .sonify-hint { display: inline-flex; align-items: center; gap: 8px; margin-top: 14px; padding: 7px 13px; border-radius: 999px; background: color-mix(in oklch, var(--current) 9%, transparent); border: 1px solid color-mix(in oklch, var(--current) 35%, transparent); font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; color: var(--current); letter-spacing: 0.02em; } .sonify-hint-ico { font-size: 13px; } /* ─── read-as-I-scroll narrator bar ──────────────────────────────────────── */ .readalong { position: fixed; left: 50%; bottom: 18px; transform: translateX(-50%); z-index: 61; display: inline-flex; align-items: center; gap: 12px; max-width: min(92vw, 520px); } .readalong-btn { display: inline-flex; align-items: center; gap: 9px; background: var(--ink); color: var(--bg-card); border: none; border-radius: 999px; padding: 11px 20px; cursor: pointer; font-family: 'IBM Plex Mono', monospace; font-size: 12.5px; letter-spacing: 0.08em; text-transform: uppercase; box-shadow: 0 10px 30px -12px var(--ink); transition: transform 140ms ease, background 140ms ease; } .readalong-btn:hover { transform: translateY(-2px); } .readalong.on .readalong-btn { background: var(--current); } .readalong-ico { font-size: 11px; } .readalong-now { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-soft); background: var(--bg-card); border: 1px solid var(--rule-strong); border-radius: 999px; padding: 6px 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 240px; } @media (max-width: 600px) { .readalong { bottom: 76px; } .readalong-now { display: none; } } @media print { .readalong { display: none; } } .narrate-ico { font-size: 9px; } /* ─── course search overlay ──────────────────────────────────────────────── */ .search-panel { position: fixed; left: 50%; top: 12vh; transform: translateX(-50%); width: min(620px, 92vw); max-height: 76vh; z-index: 80; background: var(--bg-card); border: 1px solid var(--rule-strong); border-radius: 16px; box-shadow: 0 40px 90px -40px var(--ink); display: flex; flex-direction: column; overflow: hidden; } .sp-head { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--rule); } .sp-mag { font-size: 20px; color: var(--ink-faint); } .sp-input { flex: 1; appearance: none; border: none; background: transparent; outline: none; font-family: 'Newsreader', serif; font-size: 22px; color: var(--ink); } .sp-results { overflow-y: auto; padding: 8px; } .sp-group { font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); padding: 12px 12px 6px; } .sp-row { display: flex; align-items: center; gap: 13px; padding: 10px 12px; border-radius: 9px; text-decoration: none; color: inherit; cursor: pointer; } a.sp-row:hover { background: var(--bg-deeper); } .sp-row.term { cursor: default; } .sp-row.soon { opacity: 0.5; cursor: default; } .sp-n { flex: 0 0 auto; min-width: 34px; font-size: 12px; color: var(--current); text-align: center; } .sp-title { flex: 1; display: flex; flex-direction: column; gap: 2px; font-size: 16px; color: var(--ink); } .sp-title i { font-style: normal; font-size: 12.5px; color: var(--ink-faint); line-height: 1.35; } .sp-level { flex: 0 0 auto; font-family: 'IBM Plex Mono', monospace; font-size: 10px; letter-spacing: 0.08em; color: var(--ink-faint); text-transform: uppercase; } .sp-foot { padding: 11px 18px; border-top: 1px solid var(--rule); font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--ink-faint); } .sp-foot kbd { font-family: 'IBM Plex Mono', monospace; background: var(--bg-deeper); border: 1px solid var(--rule-strong); border-radius: 4px; padding: 1px 5px; font-size: 10px; } /* ─── design gate (calculate → unlock build) ─────────────────────────────── */ .design-gate { display: flex; flex-direction: column; gap: 18px; } .dg-card { border: 1px solid var(--rule-strong); border-radius: 12px; border-left: 3px solid var(--water); background: var(--bg-card); padding: 18px 20px; } .dg-card.done { border-left-color: var(--current); } .dg-tag { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--current); margin-bottom: 10px; } .dg-spec { font-size: 14px; color: var(--ink-soft); background: var(--bg-deeper); padding: 9px 12px; border-radius: 7px; margin-bottom: 12px; } .dg-spec sub, .dg-prompt sub, .dg-formula sub, .dg-fb sub { font-size: 0.72em; } .dg-prompt { font-size: 16px; line-height: 1.5; color: var(--ink); margin-bottom: 10px; } .dg-formula { font-size: 13px; color: var(--ink-soft); background: var(--bg-deeper); padding: 8px 11px; border-radius: 7px; margin-bottom: 12px; } .dg-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; } .dg-input { display: inline-flex; align-items: center; gap: 6px; height: 42px; border: 1.5px solid var(--rule-strong); border-radius: 8px; background: var(--bg); padding: 0 12px; } .dg-input:focus-within { border-color: var(--water); } .dg-input input { appearance: none; border: none; background: transparent; outline: none; font-family: 'IBM Plex Mono', monospace; font-size: 16px; color: var(--ink); width: 110px; height: 100%; } .dg-unit { font-family: 'IBM Plex Mono', monospace; font-size: 14px; color: var(--ink-faint); } .dg-check { appearance: none; cursor: pointer; height: 42px; padding: 0 20px; border: none; border-radius: 8px; background: var(--current); color: var(--bg-card); font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; } .dg-check:disabled { background: var(--bg-deeper); color: var(--ink-faint); cursor: not-allowed; } .dg-fb { margin-top: 12px; font-size: 14.5px; line-height: 1.5; } .dg-fb.ok { color: var(--ink-soft); } .dg-fb.ok b { color: var(--current); } .dg-fb.wrong { color: #b3402f; } .dg-step2 { font-family: 'IBM Plex Mono', monospace; font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--current); margin-bottom: 12px; } .dg-lock { display: flex; align-items: center; gap: 12px; justify-content: center; padding: 40px 24px; border: 1.5px dashed var(--rule-strong); border-radius: 12px; background: var(--bg-deeper); color: var(--ink-faint); font-size: 15px; text-align: center; } .dg-lock-icon { font-size: 22px; opacity: 0.7; } .glossary-fab { position: fixed; right: 18px; bottom: 18px; z-index: 60; display: inline-flex; align-items: center; gap: 8px; background: var(--current); color: var(--bg-card); border: 2px solid var(--current-deep); border-radius: 999px; padding: 10px 16px 10px 12px; cursor: pointer; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; box-shadow: 0 6px 20px -8px var(--current); transition: transform 140ms ease; } .glossary-fab:hover { transform: translateY(-2px); } .glossary-fab .gf-q { display: inline-flex; align-items: center; justify-content: center; width: 20px; height: 20px; border-radius: 50%; background: var(--bg-card); color: var(--current); font-weight: 700; font-size: 13px; } @media (max-width: 600px) { .glossary-fab .gf-label { display: none; } } .glossary-scrim { position: fixed; inset: 0; z-index: 70; background: color-mix(in oklch, var(--ink) 32%, transparent); display: flex; justify-content: flex-end; animation: gp-fade 160ms ease; } @keyframes gp-fade { from { opacity: 0; } } .glossary-panel { width: min(440px, 92vw); height: 100%; background: var(--bg); border-left: 1px solid var(--rule-strong); display: flex; flex-direction: column; box-shadow: -18px 0 50px -30px var(--ink); animation: gp-slide 200ms cubic-bezier(.2,.7,.3,1); } @keyframes gp-slide { from { transform: translateX(40px); opacity: 0.6; } } .gp-head { display: flex; justify-content: space-between; align-items: flex-start; padding: 22px 22px 12px; } .gp-head h3 { margin: 4px 0 0; font-size: 30px; } .gp-close { appearance: none; background: transparent; border: 1px solid var(--rule-strong); width: 34px; height: 34px; border-radius: 8px; cursor: pointer; color: var(--ink-soft); font-size: 14px; } .gp-close:hover { background: var(--bg-deeper); color: var(--ink); } .gp-search { margin: 0 22px 12px; padding: 11px 14px; border: 1px solid var(--rule-strong); border-radius: 8px; background: var(--bg-card); color: var(--ink); font-family: 'Geist', system-ui, sans-serif; font-size: 15px; } .gp-search:focus { outline: 2px solid var(--current); outline-offset: -1px; } .gp-list { overflow-y: auto; padding: 4px 22px 28px; display: flex; flex-direction: column; gap: 14px; } .gp-item { border-bottom: 1px solid var(--rule); padding-bottom: 14px; } .gp-item:last-child { border-bottom: none; } .gp-item-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; } .gp-term { font-family: 'Newsreader', serif; font-style: italic; font-size: 21px; color: var(--ink); } .gp-sym { font-size: 12px; color: var(--current); background: var(--bg-deeper); padding: 2px 7px; border-radius: 5px; } .gp-unit { font-size: 11px; color: var(--ink-faint); } .gp-def { font-size: 15px; line-height: 1.5; color: var(--ink-soft); margin-top: 6px; } .gp-water { font-size: 13.5px; color: var(--water-deep); margin-top: 6px; display: flex; gap: 7px; align-items: baseline; } .gp-water-tag { flex: 0 0 auto; } .gp-empty { color: var(--ink-faint); font-style: italic; padding: 20px 0; } @media print { .glossary-fab { display: none; } } /* three-up equation cards (ch.3 "one law, three ways") — stack on narrow screens so the big fraction in the third card can't clip off the right. */ .eq-three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 22px; } @media (max-width: 620px) { .eq-three { grid-template-columns: 1fr; gap: 10px; } } /* Topbar fit on small phones. These use .topbar-scoped selectors so they win over the base .audience-pill rules regardless of source order — the base pill's 0.14em tracking on "ENGINEER/EXPLORER" is what overflows ~320px bars. (Breadcrumb + progress chip are already hidden ≤640 elsewhere.) */ @media (max-width: 600px) { .topbar { padding: 11px 12px; gap: 8px; } .topbar .audience-pill button { padding: 5px 9px; letter-spacing: 0.05em; } } @media (max-width: 360px) { .topbar { padding: 10px 10px; } .topbar .audience-pill button { padding: 4px 7px; font-size: 9.5px; letter-spacing: 0.02em; } .topbar .brand .mark { display: none; } } /* ─── Touch targets ────────────────────────────────────────────────────── On touch devices, give the primary topbar controls a comfortable thumb height (~40px) without inflating the dense desktop look. Coarse pointer only, so mouse/desktop sizing is untouched. */ @media (pointer: coarse) { .topbar .audience-pill button { min-height: 38px; display: inline-flex; align-items: center; } .topbar .cm-btn { min-height: 40px; } .topbar .course-prog { min-height: 38px; } } /* 555 free-build bench (Workbench): two columns on desktop, stack on phones so the live blinker/schematic/scope isn't crushed next to the 260px knob panel. */ @media (max-width: 720px) { .oc555-grid { grid-template-columns: 1fr !important; } } /* ─── Mobile overflow guards ───────────────────────────────────────────── body has overflow-x:hidden, so anything wider than the viewport is CLIPPED and unreachable on phones. These rules force the common multi-column layouts to stack on small screens so nothing spills off-screen. */ .wn-grid { display: grid; grid-template-columns: minmax(280px, 1fr) 1.2fr; gap: clamp(32px, 5vw, 80px); align-items: start; } @media (max-width: 760px) { .wn-grid { grid-template-columns: 1fr; gap: 32px; } } /* Collapse inline two-column card grids (rendered as style="...grid...1fr 1fr") and minmax-floored grids to a single column on phones. Inline styles beat class rules, so these need !important. */ @media (max-width: 600px) { [style*="grid"][style*="1fr 1fr"], [style*="grid"][style*="1.35fr 1fr"], [style*="grid"][style*="1.2fr"], [style*="grid"][style*="1.1fr"], [style*="minmax(280px"], [style*="minmax(300px"], [style*="minmax(320px"], [style*="minmax(340px"], [style*="minmax(360px"] { grid-template-columns: 1fr !important; } }