mirror of
https://github.com/harvard-edge/cs249r_book.git
synced 2026-05-07 02:03:55 -05:00
00c10e4413
`scroll-snap-type: y mandatory` was set on <html> globally (landing.css)
and re-asserted with !important when the v3 landing class was present
(landing-v3.css). The intended mobile escape hatch — disabling
scroll-snap-align inside @media (max-width: 768px) — never worked:
1. Specificity mismatch. Enable rules used `.mls-landing-v3
.mls-section-richcards` (0,2,0); the disable used `.mls-section-
richcards` (0,1,0). Media queries don't bump specificity, so the
enable rule won and snap stayed active on phones for two of three
sections.
2. The mandatory `scroll-snap-type` on <html> was never disabled, so
even with all snap-aligns removed, mandatory snap remained active
on iOS — fighting Safari's momentum scroll.
Both bugs combined to produce the jittery, half-snap behavior on phones.
Even fixed, mandatory snap on a content-rich landing page locks readers
into one section at a time on small viewports — the polish wasn't worth
the friction. Removed entirely.
Kept: scroll-behavior: smooth and scroll-padding-top: 60px on <html> for
in-page anchor smoothness.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
684 lines
14 KiB
CSS
684 lines
14 KiB
CSS
/* =============================================================================
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Landing V3 — Hero → Rich Cards → Impact/Support.
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Layered on top of landing.css (inherits all base styles + demo component CSS).
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Note: scroll-snap was removed (was: y mandatory across the three sections).
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`mandatory` snap fights iOS Safari momentum scroll and yanks readers away
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from mid-section content on phones. The desktop polish wasn't worth the
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mobile friction. `scroll-behavior: smooth` and `scroll-padding-top: 60px`
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from landing.css cover the in-page anchor smoothness we still want.
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============================================================================= */
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/* ─── Hero (identical to V2) ─── */
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.mls-landing-v3 .mls-section-hero {
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min-height: calc(100vh - 60px);
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display: flex;
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flex-direction: column;
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justify-content: center;
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padding-top: 1rem;
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padding-bottom: 1rem;
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}
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.mls-landing-v3 .mls-section-hero .mls-landing-grid {
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flex: 1;
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align-items: center;
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margin-top: -3rem;
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}
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.mls-landing-v3 .mls-hero-intro {
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max-width: 440px;
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}
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.mls-hero-badge {
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font-size: 0.8rem;
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font-weight: 600;
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color: var(--mls-text-muted);
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letter-spacing: 0.04em;
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margin: 0;
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opacity: 0.8;
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}
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/* Freshness/edition indicator — signals the book is actively maintained */
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.mls-hero-edition {
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display: inline-flex;
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align-items: center;
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gap: 0.5em;
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flex-wrap: wrap;
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font-size: 0.78rem;
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font-weight: 500;
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color: var(--mls-text-muted);
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letter-spacing: 0.02em;
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margin: 0.5rem 0 0 0;
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opacity: 0.85;
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}
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.mls-edition-dot {
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width: 0.55em;
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height: 0.55em;
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border-radius: 50%;
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background: #2d8a4e; /* "alive" green */
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box-shadow: 0 0 0 0 rgba(45, 138, 78, 0.55);
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animation: mlsEditionPulse 2.4s ease-out infinite;
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flex-shrink: 0;
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}
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@keyframes mlsEditionPulse {
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0% { box-shadow: 0 0 0 0 rgba(45, 138, 78, 0.55); }
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70% { box-shadow: 0 0 0 0.55em rgba(45, 138, 78, 0); }
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100% { box-shadow: 0 0 0 0 rgba(45, 138, 78, 0); }
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}
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.mls-edition-sep {
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opacity: 0.5;
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}
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.mls-edition-link {
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color: inherit;
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text-decoration: underline;
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text-decoration-color: rgba(0, 0, 0, 0.2);
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text-underline-offset: 0.18em;
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transition: text-decoration-color 0.15s ease;
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}
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.mls-edition-link:hover {
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text-decoration-color: var(--mls-accent, #A51C30);
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color: var(--mls-accent, #A51C30);
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}
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@media (prefers-reduced-motion: reduce) {
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.mls-edition-dot { animation: none; }
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}
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/* Scroll indicator — clickable */
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.mls-landing-v3 .mls-scroll-indicator {
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pointer-events: auto;
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cursor: pointer;
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animation: none !important;
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transform: translateX(-50%);
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}
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.mls-landing-v3 .mls-scroll-indicator:hover {
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opacity: 1;
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}
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.mls-landing-v3 .mls-scroll-indicator:hover span {
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color: var(--mls-accent);
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}
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.mls-landing-v3 .mls-scroll-arrow {
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animation: bounce-arrow 2s infinite;
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}
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@keyframes bounce-arrow {
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0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
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40% { transform: translateY(-10px); }
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60% { transform: translateY(-5px); }
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}
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/* ─── Snap 2: Rich card grid section ─── */
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.mls-section-richcards {
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min-height: calc(100vh - 60px);
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display: flex;
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flex-direction: column;
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justify-content: center;
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align-items: center;
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padding: 1.5rem 2rem 3.5rem;
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max-width: 1200px;
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margin: 0 auto;
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position: relative;
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}
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.mls-section-richcards > :first-child {
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margin-top: -1.5rem;
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}
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.mls-section-richcards .mls-cards-header {
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text-align: center;
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margin-bottom: 1.25rem;
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}
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.mls-cards-title {
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font-size: clamp(1.3rem, 3vw, 1.7rem);
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font-weight: 700;
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color: var(--mls-text);
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margin: 0;
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letter-spacing: -0.02em;
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border: none !important;
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border-bottom: none !important;
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padding: 0;
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}
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/* 4×2 rich card grid */
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.mls-rich-grid {
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display: grid;
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grid-template-columns: repeat(4, 1fr);
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gap: 0.85rem;
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width: 100%;
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max-width: 1100px;
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}
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/* ─── Row labels ─── */
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.mls-row-label {
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grid-column: 1 / -1;
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font-size: 0.95rem;
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font-weight: 700;
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text-transform: uppercase;
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letter-spacing: 0.14em;
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color: var(--mls-text);
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margin: 0.2rem 0 0.5rem;
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padding: 0;
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opacity: 0.72;
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}
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/* Second+ row label: divider rule + extra breathing room,
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so the two audience groups read as distinct visual bands */
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.mls-row-label:not(:first-of-type) {
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margin-top: 2.4rem;
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padding-top: 1.4rem;
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border-top: 1px solid var(--mls-glass-border);
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}
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/* ─── Card color accents (WCAG AA compliant) ─── */
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:root {
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--card-explore: #2563EB;
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--card-build: #D4740C;
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--card-deploy: #148F77;
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--card-model: #0284C7;
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--card-practice: #475569;
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--card-adopt: #6366f1;
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--card-teach: #A51C30;
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--card-follow: #475569;
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}
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[data-bs-theme="dark"] {
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--card-explore: #60a5fa;
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--card-build: #f59e0b;
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--card-deploy: #34d399;
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--card-model: #38bdf8;
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--card-practice: #94a3b8;
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--card-adopt: #a5b4fc;
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--card-teach: #f87171;
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--card-follow: #94a3b8;
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}
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/* ─── Rich card — vertical: demo thumbnail on top, text below ─── */
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.mls-rich-card {
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display: flex;
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flex-direction: column;
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border-radius: 16px;
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background: var(--mls-glass-bg);
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backdrop-filter: blur(12px);
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-webkit-backdrop-filter: blur(12px);
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border: 1px solid var(--mls-glass-border);
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box-shadow: var(--mls-card-shadow);
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text-decoration: none;
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color: var(--mls-text);
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transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
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cursor: pointer;
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position: relative;
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overflow: hidden;
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}
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/* Top accent bar — disabled, demos fill edge-to-edge */
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/* Per-card accent colors via data attribute */
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.mls-rich-card[data-accent="explore"] { --card-accent: var(--card-explore); }
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.mls-rich-card[data-accent="build"] { --card-accent: var(--card-build); }
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.mls-rich-card[data-accent="deploy"] { --card-accent: var(--card-deploy); }
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.mls-rich-card[data-accent="model"] { --card-accent: var(--card-model); }
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.mls-rich-card[data-accent="practice"]{ --card-accent: var(--card-practice); }
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.mls-rich-card[data-accent="adopt"] { --card-accent: var(--card-adopt); }
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.mls-rich-card[data-accent="teach"] { --card-accent: var(--card-teach); }
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.mls-rich-card[data-accent="follow"] { --card-accent: var(--card-follow); }
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/* Hover — lift + shadow, no border change */
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.mls-rich-card:hover {
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transform: translateY(-4px);
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box-shadow: var(--mls-card-shadow-hover);
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}
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.mls-rich-card:hover .mls-cur-name {
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color: var(--card-accent, var(--mls-accent));
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}
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/* Active press feedback */
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.mls-rich-card:active {
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transform: translateY(-1px);
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transition-duration: 0.05s;
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}
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/* Focus visible for keyboard nav */
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.mls-rich-card:focus-visible {
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outline: 2px solid var(--card-accent, var(--mls-accent));
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outline-offset: 2px;
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transform: translateY(-4px);
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}
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/* ─── Card info (below demo via order) ─── */
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.mls-rich-card-info {
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display: flex;
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flex-direction: column;
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padding: 0.75rem 1rem 0.85rem;
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flex-shrink: 0;
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order: 2;
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}
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.mls-rich-card-info .mls-cur-verb {
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font-size: 0.6rem;
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font-weight: 700;
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text-transform: uppercase;
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letter-spacing: 0.12em;
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color: var(--card-accent, var(--mls-accent));
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margin: 0 0 0.2rem;
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}
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.mls-rich-card-info .mls-cur-name {
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font-size: 0.95rem;
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font-weight: 700;
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color: var(--mls-text);
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margin: 0 0 0.25rem;
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transition: color 0.2s ease;
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}
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.mls-rich-card-info .mls-cur-desc {
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font-size: 0.75rem;
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color: var(--mls-text-muted);
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margin: 0;
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line-height: 1.4;
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display: -webkit-box;
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-webkit-line-clamp: 3;
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-webkit-box-orient: vertical;
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overflow: hidden;
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}
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/* ─── Card demo (top visual via order) ─── */
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.mls-rich-card-demo {
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width: 100%;
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height: 140px;
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display: flex;
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align-items: center;
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justify-content: center;
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overflow: hidden;
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padding: 0;
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border-bottom: 1px solid var(--mls-glass-border);
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order: 1;
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}
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.mls-rich-card-demo > svg {
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width: 100%;
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height: 100%;
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display: block;
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}
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/* Hardware kits image */
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.mls-rich-card-img {
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width: 100%;
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height: 100%;
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object-fit: contain;
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border-radius: 0;
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background: #d5f0eb;
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padding: 10px;
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}
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/* ─── Accessibility: visually hidden ─── */
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.visually-hidden {
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position: absolute;
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width: 1px;
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height: 1px;
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padding: 0;
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margin: -1px;
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overflow: hidden;
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clip: rect(0, 0, 0, 0);
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white-space: nowrap;
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border: 0;
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}
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/* ─── Snap 2: Scroll indicator ─── */
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.mls-scroll-2 {
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position: relative;
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margin-top: 3rem;
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text-align: center;
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width: 100%;
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color: var(--mls-text-muted);
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font-size: 0.85rem;
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font-weight: 600;
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text-transform: uppercase;
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letter-spacing: 0.1em;
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pointer-events: auto;
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cursor: pointer;
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animation: none !important;
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}
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.mls-scroll-2 .mls-scroll-arrow {
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font-size: 1.5rem;
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margin-top: 0.25rem;
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color: var(--mls-accent);
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animation: bounce-arrow 2s infinite;
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}
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.mls-scroll-2:hover span {
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color: var(--mls-accent);
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}
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/* ─── Snap 3: Impact & Mission (identical to V2) ─── */
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.mls-section-impact {
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min-height: calc(100vh - 60px);
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display: flex;
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flex-direction: column;
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justify-content: center;
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align-items: center;
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padding: 2rem 2rem 1.5rem;
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max-width: 950px;
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margin: 0 auto;
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gap: 1.5rem;
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text-align: center;
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}
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.mls-impact-top {
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 0.75rem;
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max-width: 650px;
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background: var(--mls-glass-bg);
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border: 1px solid var(--mls-glass-border);
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box-shadow: var(--mls-card-shadow);
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padding: 1.5rem 2.5rem;
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border-radius: 16px;
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}
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.mls-impact-eyebrow {
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font-size: 0.7rem;
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font-weight: 700;
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text-transform: uppercase;
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letter-spacing: 0.15em;
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color: var(--mls-accent);
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margin: 0;
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}
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.mls-impact-headline {
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font-size: clamp(1.6rem, 4vw, 2.4rem);
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font-weight: 800;
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color: var(--mls-text);
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letter-spacing: -0.03em;
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line-height: 1.15;
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margin: 0 0 0.25rem;
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border: none !important;
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border-bottom: none !important;
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padding: 0;
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}
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.mls-impact-mission {
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font-size: 0.92rem;
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color: var(--mls-text-muted);
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margin: 0;
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line-height: 1.6;
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}
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.mls-impact-mission strong {
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color: var(--mls-accent);
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font-weight: 700;
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}
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.mls-reader-map {
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width: 100%;
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max-width: 820px;
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}
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.mls-looker-wrap {
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position: relative;
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width: 100%;
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padding-bottom: 48%;
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border-radius: 12px;
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overflow: hidden;
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border: 1px solid var(--mls-glass-border);
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box-shadow: var(--mls-card-shadow);
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background: var(--mls-glass-bg);
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}
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.mls-looker-wrap iframe {
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position: absolute;
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top: -25%;
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left: -25%;
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width: 150%;
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height: 150%;
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border: 0;
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pointer-events: none;
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}
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.mls-looker-wrap:hover iframe {
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pointer-events: auto;
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}
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.mls-map-caption {
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font-size: 0.75rem;
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color: var(--mls-text);
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text-align: center;
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margin: 0.5rem 0 0;
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font-weight: 600;
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letter-spacing: 0.03em;
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}
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.mls-impact-bottom {
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 1rem;
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background: var(--mls-glass-bg);
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border: 1px solid var(--mls-glass-border);
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box-shadow: var(--mls-card-shadow);
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padding: 1.25rem 2.5rem;
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border-radius: 16px;
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}
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.mls-impact-stats-line {
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font-size: 0.9rem;
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font-weight: 600;
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color: var(--mls-text-muted);
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margin: 0;
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letter-spacing: 0.02em;
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}
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.mls-goal-block {
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 0.3rem;
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}
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.mls-impact-goal {
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font-size: 0.95rem;
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color: var(--mls-text);
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margin: 0;
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font-weight: 600;
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}
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.mls-impact-goal strong {
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color: var(--mls-accent);
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}
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.mls-impact-goal-sub {
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font-size: 0.82rem;
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color: var(--mls-text-muted);
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margin: 0;
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max-width: 500px;
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line-height: 1.5;
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||
}
|
||
|
||
.mls-star-row {
|
||
display: flex;
|
||
align-items: center;
|
||
gap: 0.6rem;
|
||
}
|
||
|
||
.mls-impact-sponsors {
|
||
font-size: 0.75rem;
|
||
color: var(--mls-text-muted);
|
||
margin: 0;
|
||
opacity: 0.7;
|
||
}
|
||
|
||
.mls-impact-sponsors a {
|
||
color: var(--mls-accent);
|
||
font-weight: 600;
|
||
text-decoration: none;
|
||
}
|
||
|
||
.mls-impact-sponsors a:hover {
|
||
opacity: 0.8;
|
||
}
|
||
|
||
/* Button styles */
|
||
.mls-footer-btn {
|
||
display: inline-flex;
|
||
align-items: center;
|
||
gap: 0.4rem;
|
||
padding: 0.6rem 1.3rem;
|
||
border-radius: 8px;
|
||
font-size: 0.9rem;
|
||
font-weight: 600;
|
||
text-decoration: none;
|
||
transition: all 0.2s ease;
|
||
border: 1px solid var(--mls-card-border);
|
||
}
|
||
|
||
.mls-footer-btn svg {
|
||
flex-shrink: 0;
|
||
}
|
||
|
||
.mls-btn-star {
|
||
background: rgba(0, 0, 0, 0.06);
|
||
color: var(--mls-text);
|
||
border-color: rgba(0, 0, 0, 0.15);
|
||
padding: 0.7rem 1.8rem;
|
||
font-size: 1rem;
|
||
}
|
||
|
||
.mls-btn-star:hover {
|
||
background: rgba(0, 0, 0, 0.1);
|
||
border-color: rgba(0, 0, 0, 0.25);
|
||
color: var(--mls-text);
|
||
}
|
||
|
||
[data-bs-theme="dark"] .mls-btn-star {
|
||
background: rgba(255, 255, 255, 0.08);
|
||
border-color: rgba(255, 255, 255, 0.15);
|
||
}
|
||
|
||
[data-bs-theme="dark"] .mls-btn-star:hover {
|
||
background: rgba(255, 255, 255, 0.15);
|
||
border-color: rgba(255, 255, 255, 0.25);
|
||
}
|
||
|
||
/* ═══ Responsive: Tablet (≤900px) ═══ */
|
||
|
||
@media (max-width: 900px) {
|
||
.mls-rich-grid {
|
||
grid-template-columns: repeat(2, 1fr);
|
||
gap: 0.85rem;
|
||
}
|
||
|
||
.mls-rich-card-demo {
|
||
height: 120px;
|
||
}
|
||
|
||
.mls-section-richcards {
|
||
padding: 2rem 1.5rem 4rem;
|
||
}
|
||
|
||
.mls-impact-headline {
|
||
font-size: 1.8rem;
|
||
}
|
||
}
|
||
|
||
/* ═══ Responsive: Phone (≤768px) ═══ */
|
||
|
||
@media (max-width: 768px) {
|
||
/* Cards become single column, info on top, demo below */
|
||
.mls-rich-grid {
|
||
grid-template-columns: 1fr;
|
||
gap: 1.25rem;
|
||
}
|
||
|
||
.mls-rich-card {
|
||
flex-direction: column;
|
||
min-height: auto;
|
||
}
|
||
|
||
.mls-rich-card-info {
|
||
width: 100%;
|
||
padding: 1.25rem 1.25rem 0.5rem;
|
||
}
|
||
|
||
.mls-rich-card-demo {
|
||
width: 100%;
|
||
padding: 0.5rem 1rem 1rem;
|
||
justify-content: center;
|
||
}
|
||
|
||
.mls-rich-card-demo {
|
||
height: 110px;
|
||
}
|
||
|
||
/* Phone: collapse the section min-height so content packs tightly. */
|
||
.mls-landing-v3 .mls-section-hero,
|
||
.mls-landing-v3 .mls-section-richcards,
|
||
.mls-landing-v3 .mls-section-impact {
|
||
min-height: auto;
|
||
}
|
||
|
||
.mls-cards-title {
|
||
font-size: 1.2rem;
|
||
}
|
||
|
||
.mls-hero-badge {
|
||
font-size: 0.7rem;
|
||
}
|
||
|
||
.mls-impact-headline {
|
||
font-size: 1.4rem;
|
||
}
|
||
|
||
.mls-impact-goal {
|
||
font-size: 0.8rem;
|
||
}
|
||
|
||
.mls-impact-stats-line {
|
||
font-size: 0.78rem;
|
||
}
|
||
|
||
.mls-footer-btn {
|
||
padding: 0.45rem 0.9rem;
|
||
font-size: 0.8rem;
|
||
}
|
||
|
||
.mls-section-impact {
|
||
padding: 1.5rem 1rem 1rem;
|
||
gap: 0.6rem;
|
||
}
|
||
|
||
.mls-scroll-2 {
|
||
display: none;
|
||
}
|
||
}
|
||
|
||
/* ═══ Responsive: Small phone (≤480px) ═══ */
|
||
|
||
@media (max-width: 480px) {
|
||
.mls-rich-card-demo {
|
||
height: 100px;
|
||
}
|
||
|
||
.mls-rich-card-info .mls-cur-desc {
|
||
font-size: 0.75rem;
|
||
}
|
||
|
||
.mls-rich-card-info .mls-cur-name {
|
||
font-size: 0.95rem;
|
||
}
|
||
}
|