/* * Pass 4 — application styles. * Vanilla CSS: cascade layers, semantic tokens, OKLCH, native nesting. * Tokens live in @layer base; extend them rather than hardcoding values. */ @layer reset, base, components, utilities; @layer reset { *, *::before, *::after { box-sizing: border-box; } body, h1, h2, h3, p, ol, ul, dl, dd, fieldset, figure { margin: 0; } img { max-width: 100%; display: block; } } @layer base { :root { /* Both palettes live in light-dark(light, dark). Which side applies is decided by color-scheme: the OS preference by default, or the user's explicit choice via data-theme on (theme Stimulus controller). */ color-scheme: light dark; &[data-theme="light"] { color-scheme: light; } &[data-theme="dark"] { color-scheme: dark; } /* Warm-neutral grays; no blue cast. Light surface is muted paper (not pure white) so long sessions feel easier. */ --color-surface: light-dark(oklch(94.2% 0.007 90), oklch(19% 0.004 90)); --color-card: light-dark(oklch(96.6% 0.005 90), oklch(23% 0.004 90)); --color-text: light-dark(oklch(24% 0.006 90), oklch(91% 0.004 90)); --color-text-muted: light-dark(oklch(47% 0.006 90), oklch(69% 0.005 90)); --color-text-subtle: light-dark(oklch(60% 0.005 90), oklch(56% 0.005 90)); --color-border: light-dark(oklch(25% 0.01 90 / 0.14), oklch(100% 0 0 / 0.1)); --color-border-strong: light-dark(oklch(25% 0.01 90 / 0.28), oklch(100% 0 0 / 0.2)); --color-hover-wash: light-dark(oklch(25% 0.01 90 / 0.05), oklch(100% 0 0 / 0.05)); /* Brand accent: royal blue #0c49ac (uicolors) — warm grays unchanged */ --color-accent: light-dark(oklch(43.5% 0.169 260), oklch(75% 0.13 260)); --color-correct: light-dark(oklch(52% 0.12 150), oklch(75% 0.13 150)); --color-incorrect: light-dark(oklch(54% 0.17 25), oklch(72% 0.15 25)); --color-fill-contrast: light-dark(oklch(99% 0 0), oklch(20% 0.004 90)); --text-xs: 0.75rem; --text-sm: 0.875rem; --text-base: 1rem; --text-lg: 1.125rem; --text-xl: 1.375rem; --text-2xl: 1.875rem; --text-3xl: 2.5rem; --line-height-tight: 1.25; --line-height-normal: 1.5; --line-height-relaxed: 1.625; --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem; --space-5: 1.5rem; --space-6: 2rem; --space-8: 3rem; --space-10: 4rem; --radius-md: 0.5rem; --radius-lg: 0.75rem; --radius-full: 9999px; --duration-fast: 150ms; --duration-reveal: 250ms; --ease-standard: cubic-bezier(0.4, 0, 0.2, 1); --ease-pop: cubic-bezier(0.34, 1.56, 0.64, 1); } body { max-width: 72rem; margin-inline: auto; padding-inline: var(--space-4); background: var(--color-surface); color: var(--color-text); font-family: ui-sans-serif, system-ui, sans-serif; font-size: var(--text-base); line-height: var(--line-height-normal); } h1 { font-size: var(--text-xl); font-weight: 600; line-height: var(--line-height-tight); letter-spacing: -0.01em; margin-block-end: var(--space-4); } h2 { font-size: var(--text-lg); font-weight: 600; line-height: var(--line-height-tight); margin-block: var(--space-6) var(--space-3); } p { max-width: 36em; } code { font-family: ui-monospace, monospace; font-size: 0.925em; } a { color: var(--color-accent); } :focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; } @media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } } } @layer components { /* --- Shell: chrome sits directly on the page background --- */ .site-header { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; padding-block: var(--space-4); border-block-end: 1px solid var(--color-border); .product-identity { display: flex; align-items: center; gap: var(--space-3); } .brand { font-weight: 600; color: var(--color-text); text-decoration: none; } nav { display: flex; gap: var(--space-4); align-items: center; margin-inline-start: auto; form { display: contents; } } nav a, nav .nav-link { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; &:hover { color: var(--color-text); } } /* Desktop order: Curriculum · Lectures · Practice exam · Progress · Sign out · theme. Mobile reorders via flex order + packs overflow into .nav-more. */ .nav-link--curriculum { order: 1; } .nav-link--lectures { order: 2; } .nav-link--exam { order: 3; } .nav-link--progress { order: 4; } .nav-link--sign-out { order: 5; } .nav-link--sign-in { order: 6; } .theme-toggle { order: 20; } .nav-more { display: contents; } .nav-more-toggle { display: none; order: 10; align-items: center; gap: 0.25rem; padding: 0; border: 0; background: transparent; color: var(--color-text-muted); font: inherit; font-size: var(--text-sm); cursor: pointer; &:hover { color: var(--color-text); } } .nav-more-chevron { display: block; flex: none; transition: transform var(--duration-fast) var(--ease-standard); } .nav-more.is-open .nav-more-chevron { transform: rotate(180deg); } .nav-more-panel { display: contents; } /* Sign-out is a button.quiet; keep it looking like a nav link in the row/menu. */ nav .nav-link--sign-out.quiet, nav button.nav-link--sign-out { font-size: var(--text-sm); color: var(--color-text-muted); font-weight: 400; &:hover { color: var(--color-text); } } } .part-switch { display: inline-flex; align-items: center; gap: var(--space-2); block-size: var(--space-6); padding: var(--space-1); border: 1px solid var(--color-border-strong); border-radius: var(--radius-full); background: var(--color-card); /* Keep each button_to form as a flex item so gap separates the parts. */ form { display: flex; margin: 0; block-size: 100%; } .part-option { /* Global `button` is inline-flex; active state is a — same chrome. */ display: inline-flex; align-items: center; gap: 0.3em; block-size: 100%; padding: 0 var(--space-3); border: 0; border-radius: var(--radius-full); background: transparent; color: var(--color-text-muted); font: inherit; font-size: var(--text-xs); line-height: 1; white-space: nowrap; cursor: pointer; &:hover { background: var(--color-hover-wash); color: var(--color-text); } &:active { scale: none; } &.active { background: var(--color-text); color: var(--color-surface); cursor: default; &:hover { background: var(--color-text); color: var(--color-surface); } } } } .theme-toggle { align-self: center; display: inline-flex; align-items: center; justify-content: center; inline-size: var(--space-6); block-size: var(--space-6); background: var(--color-card); border: 1px solid var(--color-border-strong); border-radius: var(--radius-full); padding: 0; cursor: pointer; color: var(--color-text-muted); &:hover { background: var(--color-hover-wash); color: var(--color-text); } svg { display: block; } /* Show the icon of the theme a click switches to: moon on a light UI, sun on a dark one. Mirrors the color-scheme logic in @layer base. */ .sun { display: none; } } :root[data-theme="dark"] .theme-toggle { .sun { display: block; } .moon { display: none; } } @media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .theme-toggle { .sun { display: block; } .moon { display: none; } } } .flash { padding: var(--space-3) var(--space-4); margin-block-end: var(--space-4); border: 1px solid color-mix(in oklab, var(--color-incorrect) 40%, transparent); border-radius: var(--radius-md); background: color-mix(in oklab, var(--color-incorrect) 7%, transparent); font-size: var(--text-sm); &.notice { border-color: color-mix(in oklab, var(--color-correct) 40%, transparent); background: color-mix(in oklab, var(--color-correct) 7%, transparent); } } main { padding-block: var(--space-6) var(--space-10); } .content-narrow { inline-size: 100%; max-width: 40rem; margin-inline: auto; } .breadcrumb { font-size: var(--text-sm); margin-block-end: var(--space-4); a { color: var(--color-text-subtle); text-decoration: none; &:hover { color: var(--color-text); text-decoration: underline; } } } .meta { font-size: var(--text-sm); color: var(--color-text-muted); } /* --- Home --- */ .hero { padding-block: var(--space-8); h1 { font-size: var(--text-2xl); } p { color: var(--color-text-muted); } .button { margin-block-start: var(--space-5); } } .home-bento { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--space-4); .bento-score { grid-column: 1 / span 2; grid-row: 1 / span 2; } .bento-exam { grid-column: 3 / -1; grid-row: 1; } .bento-left-off { grid-column: 3 / -1; grid-row: 2; } .bento-also-open { grid-column: 1 / span 2; grid-row: 3; } .bento-recent { grid-column: 3 / -1; grid-row: 3; } .bento-units { grid-column: 1 / -1; } &.home-bento--without-score { .bento-exam { grid-column: 1 / span 4; grid-row: 1; } .bento-left-off { grid-column: 5 / -1; grid-row: 1; } .bento-also-open { grid-column: 1 / -1; grid-row: 2; } } &.home-bento--without-also-open .bento-recent { grid-column: 1 / -1; } &.home-bento--part-a .bento-coming-soon { grid-column: 1 / -1; } } .bento-cell, .unit-tile { border: 1px solid var(--color-border); background: var(--color-card); } .bento-cell { display: flex; flex-direction: column; min-width: 0; padding: var(--space-5); border-radius: var(--radius-md); &.bento-score, &.bento-left-off { padding: var(--space-6); border-radius: var(--radius-lg); } h1, h2 { margin: 0; } } .bento-link { color: inherit; text-decoration: none; transition: border-color var(--duration-fast) var(--ease-standard), translate var(--duration-fast) var(--ease-standard); &:hover { border-color: var(--color-border-strong); translate: 0 -1px; } } .bento-card-heading, .bento-section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); h2 { margin: 0; } form { flex: none; margin: 0; } a { flex: none; font-size: var(--text-sm); } } .bento-card-heading { align-items: center; } .bento-section-heading { margin-block-end: var(--space-3); } .eyebrow { font-size: var(--text-xs); font-weight: 600; text-transform: uppercase; color: var(--color-text-subtle); } .bento-meta { margin-block-start: var(--space-2); max-width: none; font-size: var(--text-sm); color: var(--color-text-muted); } .bento-exam { h2 { margin-block-start: var(--space-1); } .exam-time-remaining { display: inline-flex; align-items: baseline; gap: var(--space-1); margin-inline-start: var(--space-2); padding-inline-start: var(--space-2); border-inline-start: 1px solid var(--color-border); strong { color: var(--color-text); font-weight: 600; font-variant-numeric: tabular-nums; } } } .bento-score { justify-content: center; .value { font-size: var(--text-3xl); font-weight: 600; line-height: var(--line-height-tight); font-variant-numeric: tabular-nums; } .label { margin-block-start: var(--space-1); font-size: var(--text-sm); color: var(--color-text-muted); } .context { font-size: var(--text-xs); color: var(--color-text-subtle); } } .bento-score-support { display: grid; gap: var(--space-1); margin-block-start: var(--space-5); padding-block-start: var(--space-4); border-block-start: 1px solid var(--color-border); font-size: var(--text-xs); color: var(--color-text-muted); strong { color: var(--color-text); font-weight: 600; font-variant-numeric: tabular-nums; } } .bento-left-off { h2 { margin-block-start: var(--space-2); font-size: var(--text-xl); } .chapter-mastery { margin-block-start: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); strong { color: var(--color-text); font-variant-numeric: tabular-nums; } } } .bento-actions { margin-block-start: auto; padding-block-start: var(--space-5); form { margin: 0; } } .bento-list { list-style: none; padding: 0; li + li { border-block-start: 1px solid var(--color-border); } a { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: var(--space-4); padding-block: var(--space-3); color: inherit; text-decoration: none; transition: color var(--duration-fast) var(--ease-standard); &:hover { color: var(--color-accent); } } } .bento-row-copy { display: grid; gap: var(--space-1); min-width: 0; strong { font-weight: 500; } .meta { font-size: var(--text-xs); color: var(--color-text-subtle); } } .bento-row-score { font-weight: 600; font-variant-numeric: tabular-nums; } .bento-units h2 { margin: 0; } .unit-tiles { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: var(--space-3); } .unit-tile { display: grid; align-content: start; gap: var(--space-1); min-width: 0; padding: var(--space-4); border-radius: var(--radius-md); color: inherit; text-decoration: none; transition: border-color var(--duration-fast) var(--ease-standard), translate var(--duration-fast) var(--ease-standard); &:is(a):hover { border-color: var(--color-border-strong); translate: 0 -1px; } .unit-tile-code { font-size: var(--text-xs); color: var(--color-text-subtle); font-variant-numeric: tabular-nums; } strong { font-size: var(--text-sm); font-weight: 500; line-height: var(--line-height-tight); } .unit-tile-mastery { margin-block-start: var(--space-2); font-size: var(--text-xs); color: var(--color-text-muted); font-variant-numeric: tabular-nums; } &.ghost-unit { cursor: default; color: var(--color-text-subtle); opacity: 0.65; } } .bento-coming-soon { padding: var(--space-8); border-radius: var(--radius-lg); h1 { margin-block: var(--space-2); } p:last-child { color: var(--color-text-muted); } } .curriculum-coming-soon { p:last-child { color: var(--color-text-muted); } } .curriculum-ghosts { margin-block-start: var(--space-5); } /* --- Buttons: one family, pyramid of emphasis --- */ .button, button, input[type="submit"] { display: inline-flex; align-items: center; padding: var(--space-2) var(--space-4); border: 1px solid transparent; border-radius: var(--radius-md); background: var(--color-accent); color: var(--color-fill-contrast); font: inherit; font-size: var(--text-sm); font-weight: 500; text-decoration: none; cursor: pointer; transition: background-color var(--duration-fast) var(--ease-standard), border-color var(--duration-fast) var(--ease-standard), scale var(--duration-fast) var(--ease-standard); &:hover { background: color-mix(in oklab, var(--color-accent) 86%, var(--color-text)); } &:active { scale: 0.97; } &.secondary { background: transparent; border-color: var(--color-border-strong); color: var(--color-text); &:hover { background: var(--color-hover-wash); border-color: var(--color-text-subtle); } } &.quiet { background: transparent; padding: 0; color: var(--color-text-muted); font-weight: 400; &:hover { background: transparent; color: var(--color-text); } &:active { scale: none; } } } .actions { display: flex; gap: var(--space-2); align-items: center; margin-block-start: var(--space-3); form { margin: 0; } } /* --- Curriculum grids: unit and chapter cards --- */ .unit-heading { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--space-3) var(--space-4); margin-block-end: var(--space-4); h1 { margin: 0; } form { flex: none; } } .unit-heading-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); flex: none; } /* Space before the chapter card grid on unit show. */ .unit-description { margin-block-end: var(--space-6); } .unit-tile-wrap { display: flex; flex-direction: column; gap: var(--space-1); min-width: 0; } .unit-tile-cheatsheet { font-size: var(--text-xs); color: var(--color-text-muted); text-decoration: none; padding-inline: var(--space-1); &:hover { color: var(--color-text); text-decoration: underline; } } /* --- Unit cheatsheet --- */ .cheatsheet-heading { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: var(--space-3) var(--space-4); margin-block-end: var(--space-6); h1 { margin: 0; } .meta { margin-block-start: var(--space-1); } } .cheatsheet-cram-band, .cheatsheet-deeper { margin-block-end: var(--space-7); > h2 { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-block-end: var(--space-4); } } .cheatsheet-chapter-cram, .cheatsheet-chapter-deep { margin-block-end: var(--space-5); h3 { font-size: var(--text-base); font-weight: 500; margin-block-end: var(--space-3); } } .cheatsheet-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); th, td { text-align: start; vertical-align: top; padding: var(--space-2) var(--space-2); border-block-end: 1px solid var(--color-border); } thead th { font-size: var(--text-xs); font-weight: 500; color: var(--color-text-muted); border-block-end-color: var(--color-border-strong); } tbody th { font-weight: 500; padding-inline-start: 0; } .cheatsheet-kind { color: var(--color-text-muted); font-size: var(--text-xs); white-space: nowrap; } } .cheatsheet-deep-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-3); li { display: grid; gap: var(--space-1); font-size: var(--text-sm); line-height: var(--line-height-normal); } strong { font-weight: 500; } span { color: var(--color-text-muted); } } .cheatsheet-disclaimer { margin-block-start: var(--space-6); padding-block-start: var(--space-4); border-block-start: 1px solid var(--color-border); font-size: var(--text-xs); color: var(--color-text-muted); line-height: var(--line-height-normal); } /* --- Chapter lecture (Listen) --- */ .visually-hidden { position: absolute; inline-size: 1px; block-size: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; } .lecture-heading { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: var(--space-3) var(--space-4); margin-block-end: var(--space-5); h1 { margin: 0; } .meta { margin-block-start: var(--space-1); } .lecture-heading-actions { flex: none; display: flex; gap: var(--space-2); align-items: center; } } .lecture .eyebrow { font-size: var(--text-xs); font-weight: 500; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-block-end: var(--space-2); } .lecture-player { position: sticky; inset-block-start: 0; z-index: 5; margin-block-end: var(--space-6); padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: color-mix(in oklab, var(--color-card) 92%, var(--color-surface)); backdrop-filter: blur(8px); audio { display: none; } } .lecture-player-bar { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); } .lecture-player-play { flex: none; display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); min-inline-size: 5.25rem; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); background: var(--color-accent); color: var(--color-fill-contrast); font: inherit; font-size: var(--text-sm); font-weight: 500; cursor: pointer; svg { display: block; flex: none; } .icon-pause { display: none; } &:hover { background: color-mix(in oklab, var(--color-accent) 86%, var(--color-text)); } &[aria-busy="true"] { opacity: 0.85; } } .lecture-player.is-playing .lecture-player-play { .icon-play { display: none; } .icon-pause { display: block; } } .lecture-player-timeline { flex: 1 1 12rem; display: flex; align-items: center; gap: var(--space-2); min-inline-size: 0; } .lecture-player-time { flex: none; font-size: var(--text-xs); font-variant-numeric: tabular-nums; color: var(--color-text-muted); min-inline-size: 2.25rem; } .lecture-player-scrub { flex: 1; min-inline-size: 0; accent-color: var(--color-accent); } .lecture-player-tools { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); } .lecture-player-skip { display: inline-flex; align-items: center; justify-content: center; gap: 0.15rem; min-inline-size: 2.75rem; padding: var(--space-1) var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: transparent; color: var(--color-text-muted); font: inherit; font-size: var(--text-xs); font-variant-numeric: tabular-nums; cursor: pointer; svg { display: block; flex: none; } &:hover { color: var(--color-text); border-color: var(--color-border-strong); background: var(--color-hover-wash); } } .lecture-player-speed select { font: inherit; font-size: var(--text-xs); color: var(--color-text); background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-1) var(--space-2); } .lecture-player-resume { margin-block-start: var(--space-2); } .lecture-player-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; margin-block-start: var(--space-2); margin-block-end: 0; } .lecture-notice { margin-block-end: var(--space-5); padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-card); font-size: var(--text-sm); color: var(--color-text-muted); } .lecture-transcript { display: grid; gap: var(--space-6); } .lecture-section { h2 { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); margin-block-end: var(--space-3); } p { margin-block: 0 var(--space-3); line-height: var(--line-height-relaxed, 1.6); color: var(--color-text); } p:last-child { margin-block-end: 0; } } .lecture-footer-cta { margin-block-start: var(--space-7); padding-block-start: var(--space-5); border-block-start: 1px solid var(--color-border); } .lecture-disclaimer { margin-block-start: var(--space-6); padding-block-start: var(--space-4); border-block-start: 1px solid var(--color-border); font-size: var(--text-xs); color: var(--color-text-muted); line-height: var(--line-height-normal); } /* --- Lectures library (global index + sticky dock) --- */ .lectures-library { /* Clearance for taller sticky dock (tools row + bottom pad). */ padding-block-end: 9rem; .eyebrow { font-size: var(--text-xs); font-weight: 500; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.04em; margin-block-end: var(--space-2); } h1 { margin-block: 0 var(--space-2); } .lectures-library-header .meta { margin-block-end: var(--space-6); color: var(--color-text-muted); } } .lectures-unit { margin-block-end: var(--space-6); } .lectures-unit-heading { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-2); margin-block: 0 var(--space-3); font-size: var(--text-lg); font-weight: 500; .unit-code { color: var(--color-text-muted); font-variant-numeric: tabular-nums; } } .lectures-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); grid-template-columns: 1fr; /* Side-by-side chapter cards on wider screens only. */ @media (min-width: 48rem) { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); } } .lectures-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-card); min-inline-size: 0; cursor: pointer; &:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; } &.is-current { border-color: color-mix(in oklab, var(--color-accent) 45%, var(--color-border)); background: color-mix(in oklab, var(--color-accent) 5%, var(--color-card)); } /* Auto-advance interstitial: next chapter while chime plays. */ &.is-up-next { border-color: color-mix(in oklab, var(--color-accent) 30%, var(--color-border)); background: color-mix(in oklab, var(--color-accent) 3%, var(--color-card)); } } .lectures-row-play { flex: none; align-self: center; display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2); min-inline-size: 5rem; padding: var(--space-2) var(--space-3); border: 1px solid color-mix(in oklab, var(--color-accent) 70%, var(--color-text)); border-radius: var(--radius-md); /* Top-lit gradient on brand accent */ background: linear-gradient( 180deg, color-mix(in oklab, var(--color-accent) 82%, white) 0%, var(--color-accent) 48%, color-mix(in oklab, var(--color-accent) 78%, black) 100% ); color: var(--color-fill-contrast); font: inherit; font-size: var(--text-sm); font-weight: 500; cursor: pointer; pointer-events: none; /* card owns the hit target; button is visual affordance */ transition: transform var(--duration-fast) var(--ease-pop), filter var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard); box-shadow: 0 1px 0 color-mix(in oklab, white 18%, transparent) inset; svg { display: block; flex: none; } /* Hover/focus motion is driven by the card (button is non-interactive). */ } .lectures-row:hover .lectures-row-play, .lectures-row:focus-visible .lectures-row-play { filter: brightness(1.06); box-shadow: 0 1px 0 color-mix(in oklab, white 22%, transparent) inset, 0 0.25rem 0.6rem color-mix(in oklab, var(--color-accent) 28%, transparent); } @media (prefers-reduced-motion: no-preference) { .lectures-row:hover .lectures-row-play, .lectures-row:focus-visible .lectures-row-play { transform: scale(1.03); } } /* Title above; duration + open share a meta row (open trailing, baseline-aligned). */ .lectures-row-main { flex: 1 1 12rem; min-inline-size: 0; display: flex; flex-direction: column; gap: var(--space-1); } .lectures-row-title { font-weight: 500; line-height: var(--line-height-tight); } .lectures-row-chapter { color: var(--color-text-muted); font-variant-numeric: tabular-nums; font-weight: 500; margin-inline-end: var(--space-1); } .lectures-row-meta { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--space-2) var(--space-3); inline-size: 100%; } .lectures-row-duration { flex: none; } .lectures-row-open { flex: none; margin-inline-start: auto; font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; white-space: nowrap; cursor: pointer; /* Keep link clickable above the card hit target. */ position: relative; z-index: 1; &:hover { color: var(--color-text); text-decoration: underline; } } .lectures-dock { position: fixed; inset-inline: 0; inset-block-end: 0; z-index: 20; padding-block-start: var(--space-3); padding-inline: var(--space-4); /* Extra bottom room for thumbs + home indicator. */ padding-block-end: calc(var(--space-5) + env(safe-area-inset-bottom, 0px)); /* Frosted bar: translucent card + blur; accent-tinted top seam. */ border-block-start: 1px solid color-mix(in oklab, var(--color-accent) 45%, var(--color-border-strong)); background: color-mix(in oklab, var(--color-card) 90%, transparent); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); box-shadow: 0 -0.25rem 0.75rem color-mix(in oklab, var(--color-text) 8%, transparent), 0 -0.75rem 2rem color-mix(in oklab, var(--color-text) 12%, transparent); &[data-active="false"] .lecture-player-bar { opacity: 0.72; } &[data-active="false"] .lectures-dock-tools { opacity: 0.72; } &[data-chapter-break="true"] .lectures-now-playing { color: var(--color-accent); } } .lectures-now-playing { margin: 0 0 var(--space-2); font-size: var(--text-sm); font-weight: 500; line-height: var(--line-height-tight); color: var(--color-text); max-inline-size: 72rem; margin-inline: auto; } .lectures-dock-player { position: static; margin: 0; max-inline-size: 72rem; margin-inline: auto; padding: 0; border: 0; border-radius: 0; background: transparent; backdrop-filter: none; .lecture-player-play:disabled { opacity: 0.55; cursor: not-allowed; } .lecture-player-resume { margin-block: var(--space-2) 0; } } /* Secondary tools: Play from start · speed · −15 · +15 on one row. */ .lectures-dock-tools { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2) var(--space-3); margin-block-start: var(--space-2); .lectures-dock-restart { flex: none; padding: 0; font-size: var(--text-sm); } .lecture-player-speed, .lecture-player-skip { flex: none; } .lecture-player-skip:disabled { opacity: 0.55; cursor: not-allowed; } } @media (max-width: 32rem) { .lectures-library { padding-block-end: 12rem; } .lectures-row-play span { display: none; } .lectures-row-play { min-inline-size: 2.5rem; padding-inline: var(--space-2); } } .review-actions { flex-wrap: wrap; } .unit-cards, .chapters { list-style: none; padding: 0; display: grid; gap: var(--space-4); } .unit-cards { grid-template-columns: repeat(auto-fill, minmax(17rem, 1fr)); li { min-width: 0; } } .unit-card { display: flex; flex-direction: column; block-size: 100%; padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-card); color: inherit; text-decoration: none; transition: border-color var(--duration-fast) var(--ease-standard), translate var(--duration-fast) var(--ease-standard); &:hover { border-color: var(--color-border-strong); translate: 0 -1px; } .unit-card-top { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-2); margin-block-end: var(--space-1); } .unit-card-mastery { font-size: var(--text-xs); color: var(--color-text-muted); font-variant-numeric: tabular-nums; } strong { font-weight: 500; line-height: var(--line-height-tight); } p { font-size: var(--text-sm); color: var(--color-text-muted); margin-block-start: var(--space-1); } .unit-card-foot { display: grid; gap: var(--space-1); margin-block-start: auto; padding-block-start: var(--space-3); .meta { font-size: var(--text-xs); color: var(--color-text-subtle); } } } .unit-code { font-size: var(--text-xs); color: var(--color-text-subtle); font-variant-numeric: tabular-nums; margin-inline-end: var(--space-1); } .chapters { grid-template-columns: repeat(auto-fill, minmax(21rem, 1fr)); } .chapter-card { display: flex; flex-direction: column; min-width: 0; padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-card); scroll-margin-block-start: var(--space-6); /* "You are here" cue when arriving via a #chapter_N anchor */ &:target { border-color: color-mix(in oklab, var(--color-accent) 45%, var(--color-border)); background: color-mix(in oklab, var(--color-accent) 5%, var(--color-card)); } .chapter-card-number { font-size: var(--text-xs); color: var(--color-text-subtle); font-variant-numeric: tabular-nums; } strong { font-weight: 500; line-height: var(--line-height-tight); margin-block-start: var(--space-1); } .meta { margin-block-start: var(--space-1); } .muted { color: var(--color-text-subtle); } /* Listen (primary, full width) above quiz actions (secondary row). */ .chapter-card-ctas { display: flex; flex-direction: column; gap: var(--space-4); margin-block-start: auto; padding-block-start: var(--space-4); } .chapter-card-listen { margin: 0; } .chapter-card-listen-button { display: flex; inline-size: 100%; justify-content: center; } /* Full-width quiz row: lone Start quiz matches Listen; Resume + Start over share the row with content-weighted flex grow (gap stays --space-2). */ .actions { inline-size: 100%; margin-block-start: 0; padding-block-start: 0; > a, > form { flex: 1 1 auto; } form { display: flex; margin: 0; } > a.button, form .button, form button, form input[type="submit"] { inline-size: 100%; justify-content: center; white-space: nowrap; } } &.ghost { color: var(--color-text-subtle); opacity: 0.65; } } /* --- Choice cards (question form and feedback) --- */ .diagram { margin-block: 0 var(--space-4); padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); img { display: block; inline-size: 100%; max-inline-size: 34rem; block-size: auto; margin-inline: auto; } } .choice { position: relative; display: flex; gap: var(--space-3); padding: var(--space-3) var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard), box-shadow var(--duration-fast) var(--ease-standard), translate var(--duration-fast) var(--ease-standard); .letter { flex: none; inline-size: 1.75rem; block-size: 1.75rem; border: 1px solid var(--color-border-strong); border-radius: var(--radius-full); text-align: center; line-height: 1.65rem; font-weight: 600; font-size: var(--text-sm); color: var(--color-text-muted); transition: border-color var(--duration-fast) var(--ease-standard), background-color var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard); } } .question { .stem { padding: 0; margin-block-end: var(--space-4); font-size: var(--text-lg); font-weight: 600; line-height: var(--line-height-tight); } fieldset { display: grid; gap: var(--space-2); padding: 0; border: 0; } .choice { cursor: pointer; input[type="radio"] { position: absolute; opacity: 0; pointer-events: none; } &:hover { border-color: var(--color-border-strong); background: var(--color-hover-wash); translate: 0 -1px; box-shadow: 0 2px 6px oklch(0% 0 0 / 0.06); } &:has(input[type="radio"]:focus-visible) { outline: 2px solid var(--color-accent); outline-offset: 2px; } &:has(input[type="radio"]:checked) { border-color: var(--color-accent); background: color-mix(in oklab, var(--color-accent) 7%, transparent); .letter { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-fill-contrast); } } } input[type="submit"] { margin-block-start: var(--space-5); } } /* --- Answer feedback --- */ @keyframes rise-in { from { opacity: 0; translate: 0 8px; } to { opacity: 1; translate: 0 0; } } @keyframes badge-pop { 0% { scale: 0.4; } 70% { scale: 1.2; } 100% { scale: 1; } } @keyframes head-shake { 0%, 100% { translate: 0 0; } 25% { translate: -4px 0; } 62% { translate: 3px 0; } } .feedback { margin-block: var(--space-5); &.correct { --color-verdict: var(--color-correct); } &.incorrect { --color-verdict: var(--color-incorrect); } &.unanswered { --color-verdict: var(--color-text-muted); } .verdict { font-weight: 600; color: var(--color-verdict); animation: rise-in var(--duration-reveal) var(--ease-standard) both; } /* Reveal choreography: cards cascade in, then the correct badge pops and a wrong pick shakes its head */ .choices .choice { animation: rise-in var(--duration-reveal) var(--ease-standard) both; &:nth-child(1) { animation-delay: 60ms; } &:nth-child(2) { animation-delay: 120ms; } &:nth-child(3) { animation-delay: 180ms; } &:nth-child(4) { animation-delay: 240ms; } &.right .letter { animation: badge-pop 350ms 550ms var(--ease-pop) both; } &.chosen:not(.right) .letter { animation: head-shake 300ms 550ms var(--ease-standard) both; } } .choices { list-style: none; margin-block: var(--space-4); padding: 0; display: grid; gap: var(--space-2); .choice { .text { max-width: none; } .tag { margin-inline-start: var(--space-1); padding: 0.125rem var(--space-2); border-radius: var(--radius-full); font-size: var(--text-xs); font-weight: 500; color: var(--color-verdict); background: color-mix(in oklab, var(--color-verdict) 12%, transparent); white-space: nowrap; } .why { margin-block-start: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); p { margin-block-start: var(--space-1); } } &.right { border-color: var(--color-correct); background: color-mix(in oklab, var(--color-correct) 7%, transparent); .text { font-weight: 600; } .letter { border-color: var(--color-correct); background: var(--color-correct); color: var(--color-fill-contrast); } } &.chosen:not(.right) { border-color: var(--color-incorrect); background: color-mix(in oklab, var(--color-incorrect) 7%, transparent); .letter { border-color: var(--color-incorrect); background: var(--color-incorrect); color: var(--color-fill-contrast); } } } } } /* --- Sign in --- */ .auth { max-width: 26rem; p { color: var(--color-text-muted); } form { margin-block-start: var(--space-5); } } .input-group { margin-block-end: var(--space-5); label { display: block; margin-block-end: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); } input { inline-size: 100%; block-size: 3rem; padding-inline: var(--space-4); font: inherit; color: inherit; background: var(--color-surface); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); &::placeholder { color: var(--color-text-subtle); } &:focus-visible { border-color: var(--color-accent); } } } /* --- Progress --- */ .projected-score { .details { display: grid; gap: var(--space-1); } .readiness-status { font-size: var(--text-sm); font-weight: 500; } &.on-track { box-shadow: inset 0 -3px var(--color-correct); } &.below-mark { box-shadow: inset 0 -3px var(--color-incorrect); } } .weak-chapters { .action { text-align: end; form { display: inline; } button { padding: var(--space-1) var(--space-3); } } } .empty-state-action { margin-block-start: var(--space-4); } /* --- Attempt history --- */ .table-container { border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow-x: auto; } table:is(.attempts, .unit-breakdown, .unit-readiness, .weak-chapters) { inline-size: 100%; border-collapse: collapse; font-size: var(--text-sm); th { font-size: var(--text-xs); font-weight: 500; color: var(--color-text-subtle); text-align: start; padding: var(--space-2) var(--space-4); border-block-end: 1px solid var(--color-border); } td { padding: var(--space-3) var(--space-4); } tbody tr:nth-child(even) { background: var(--color-hover-wash); } a { color: inherit; font-weight: 500; text-decoration: none; &:hover { text-decoration: underline; } } td .meta { font-size: var(--text-xs); color: var(--color-text-subtle); margin-inline-start: var(--space-2); } .when { color: var(--color-text-muted); } .numeric { text-align: end; font-variant-numeric: tabular-nums; } } /* --- Results: score as the hero metric --- */ .score { display: flex; align-items: baseline; gap: var(--space-3); padding: var(--space-4) var(--space-5); border-radius: var(--radius-md); background: var(--color-accent); color: var(--color-fill-contrast); .value { font-size: var(--text-2xl); font-weight: 600; line-height: var(--line-height-tight); font-variant-numeric: tabular-nums; } .label { font-size: var(--text-sm); color: color-mix(in oklab, var(--color-fill-contrast) 78%, var(--color-accent)); } } .exam-score { .details { display: grid; gap: var(--space-1); } .exam-verdict { font-size: var(--text-lg); font-weight: 600; } } .unit-breakdown { .unit-code { color: var(--color-text-subtle); } } .review { list-style: none; padding: 0; margin-block: var(--space-6); > li { padding-block: var(--space-5); + li { border-block-start: 1px solid var(--color-border); } .stem { font-weight: 500; } .feedback { margin-block: var(--space-3) 0; } } } .exam-review { .feedback .verdict, .feedback .choices .choice { animation: none; } } /* --- Timed practice exam --- */ .exam-heading { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); padding-block-end: var(--space-4); border-block-end: 1px solid var(--color-border); h1 { margin-block-end: var(--space-1); } } .exam-timer { display: grid; justify-items: end; gap: var(--space-1); .label { font-size: var(--text-xs); color: var(--color-text-subtle); } time { font-size: var(--text-lg); font-weight: 600; font-variant-numeric: tabular-nums; } } .exam-question-tools { display: flex; justify-content: flex-end; margin-block: var(--space-4); form { margin: 0; } } .exam-flag { &.flagged { border-color: var(--color-accent); color: var(--color-accent); background: color-mix(in oklab, var(--color-accent) 7%, transparent); } } .exam-question { .stem { max-width: 32em; line-height: var(--line-height-normal); } } .exam-step-navigation { display: flex; justify-content: space-between; gap: var(--space-3); padding-block: var(--space-5); } .exam-navigator { padding-block: var(--space-4) var(--space-5); border-block: 1px solid var(--color-border); h2 { margin-block: 0 var(--space-3); font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); } ol { display: grid; grid-template-columns: repeat(10, 1fr); gap: var(--space-2); list-style: none; padding: 0; } a { position: relative; display: grid; place-items: center; min-block-size: 2.25rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); color: var(--color-text-muted); font-size: var(--text-sm); font-variant-numeric: tabular-nums; text-decoration: none; &:hover { border-color: var(--color-border-strong); background: var(--color-hover-wash); color: var(--color-text); } &.answered { border-color: var(--color-text-muted); background: var(--color-text); color: var(--color-surface); } &.current { outline: 2px solid var(--color-accent); outline-offset: 2px; } &.flagged::after { content: ""; position: absolute; inset-block-start: var(--space-1); inset-inline-end: var(--space-1); inline-size: var(--space-1); block-size: var(--space-1); border-radius: var(--radius-full); background: var(--color-accent); } } } .exam-submit { display: flex; align-items: baseline; justify-content: flex-end; gap: var(--space-4); padding-block-start: var(--space-5); form { margin: 0; } } .timer-submission { display: none; } .exam-intro { margin-block-start: var(--space-5); color: var(--color-text-muted); } .exam-readiness { display: flex; flex-wrap: wrap; gap: var(--space-8); margin-block-start: var(--space-5); padding: var(--space-5) var(--space-6); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-card); .metric { display: grid; gap: var(--space-1); align-content: start; } .value { font-size: var(--text-2xl); font-weight: 600; line-height: var(--line-height-tight); font-variant-numeric: tabular-nums; } .metric.latest .value { font-size: var(--text-3xl); } .label { font-size: var(--text-xs); color: var(--color-text-muted); } .verdict { font-size: var(--text-xs); font-weight: 500; &.passed { color: var(--color-correct); } &.missed { color: var(--color-incorrect); } } } .weak-units h2 { margin-block-end: var(--space-3); } .exam-history { list-style: none; padding: 0; li { display: flex; align-items: center; gap: var(--space-4); & + li { border-block-start: 1px solid var(--color-border); } } li > a:first-child { flex: 1; display: flex; justify-content: space-between; gap: var(--space-3); padding-block: var(--space-3); color: var(--color-text); text-decoration: none; &:hover { background: var(--color-hover-wash); } } .delta { font-variant-numeric: tabular-nums; } .review-missed { flex: none; font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; &:hover { color: var(--color-text); text-decoration: underline; } } } .review-heading { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-4); a { font-size: var(--text-sm); } } @media (max-width: 32rem) { .site-header nav { gap: var(--space-3); /* Mobile: Curriculum · Practice exam · More · Sign in · theme */ .nav-link--curriculum { order: 1; } .nav-link--exam { order: 2; } .nav-more { order: 3; } .nav-link--sign-in { order: 4; } .theme-toggle { order: 5; } .nav-more { display: block; position: relative; } .nav-more-toggle { display: inline-flex; } .nav-more-panel { display: none; position: absolute; inset-block-start: calc(100% + var(--space-2)); inset-inline-end: 0; min-inline-size: 10.5rem; padding: var(--space-2); border: 1px solid var(--color-border-strong); border-radius: var(--radius-md); background: var(--color-card); box-shadow: 0 0.5rem 1.25rem color-mix(in oklab, var(--color-text) 12%, transparent); z-index: 30; flex-direction: column; align-items: stretch; gap: var(--space-1); } .nav-more.is-open .nav-more-panel { display: flex; } .nav-more-panel .nav-link, .nav-more-panel a, .nav-more-panel button { order: unset; display: block; inline-size: 100%; padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); text-align: start; box-sizing: border-box; } .nav-more-panel a:hover, .nav-more-panel button:hover { background: var(--color-hover-wash); } .nav-more-sign-out-form { display: block; margin: 0; } .nav-more-panel .nav-link--sign-out.quiet { border: 0; background: transparent; cursor: pointer; } } .part-switch { .part-label { display: none; } .part-option { padding-inline: var(--space-2); } } .home-bento { grid-template-columns: 1fr; > .bento-cell, > .bento-units { grid-column: 1 / -1; grid-row: auto; } &.home-bento--without-score > .bento-cell { grid-column: 1 / -1; grid-row: auto; } } .bento-card-heading { align-items: flex-start; flex-direction: column; } .bento-exam .exam-time-remaining { display: block; margin-block-start: var(--space-1); margin-inline-start: 0; padding-inline-start: 0; border-inline-start: 0; } .bento-cell { &.bento-score, &.bento-left-off { padding: var(--space-5); } } .unit-tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); } .exam-score { align-items: flex-start; flex-direction: column; } .projected-score { align-items: flex-start; flex-direction: column; } .exam-heading { align-items: flex-start; } .exam-navigator ol { grid-template-columns: repeat(5, 1fr); } } }