/* Skyline — a living sky backdrop for a modern blog. Day: gradient sky, sun, drifting clouds. Night: deep gradient, moon, twinkling stars. State lives in , see static/js/theme.js. */ :root { --sky-top: #3f97f6; --sky-mid: #7fc2ff; --sky-bottom: #eaf6ff; --sun-core: #fff3d1; --sun-glow: rgba(255, 214, 110, 0.55); --cloud: rgba(255, 255, 255, 0.92); --cloud-shadow: rgba(90, 130, 170, 0.18); --text: #1b2430; --muted: #55606e; --accent: #1866c4; --accent-soft: rgba(24, 102, 196, 0.12); --card-bg: rgba(255, 255, 255, 0.6); --card-border: rgba(255, 255, 255, 0.75); --card-shadow: rgba(40, 70, 110, 0.18); --header-bg: rgba(255, 255, 255, 0.38); --divider: rgba(30, 40, 55, 0.1); --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; --radius: 18px; } html[data-sky="night"] { --sky-top: #04060f; --sky-mid: #0b1330; --sky-bottom: #1c2c50; --moon-core: #f6f2e7; --moon-shade: rgba(0, 0, 0, 0.12); --moon-glow: rgba(230, 225, 200, 0.35); --text: #eef1f8; --muted: #a4aec4; --accent: #8fc1ff; --accent-soft: rgba(143, 193, 255, 0.14); --card-bg: rgba(16, 20, 38, 0.55); --card-border: rgba(255, 255, 255, 0.1); --card-shadow: rgba(0, 0, 0, 0.45); --header-bg: rgba(6, 9, 20, 0.45); --divider: rgba(255, 255, 255, 0.1); } * { box-sizing: border-box; } html, body { height: 100%; } body { margin: 0; font-family: var(--font); color: var(--text); line-height: 1.65; min-height: 100vh; transition: color 0.5s ease; } /* ---------- sky backdrop ---------- */ .sky { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: linear-gradient( 180deg, var(--sky-top) 0%, var(--sky-mid) 45%, var(--sky-bottom) 100% ); transition: background 0.8s ease; } /* sun / moon */ .sky .orb { position: absolute; top: 8%; right: 12%; width: 110px; height: 110px; border-radius: 50%; transition: opacity 0.8s ease, transform 0.8s ease; } .sky .sun { background: radial-gradient(circle at 35% 35%, var(--sun-core), #ffb648 70%); box-shadow: 0 0 90px 30px var(--sun-glow); opacity: 1; } .sky .moon { background: radial-gradient(circle at 35% 35%, var(--moon-core, #f6f2e7), #cfc9b8 75%); box-shadow: 0 0 70px 18px var(--moon-glow, rgba(230, 225, 200, 0.35)), -18px -10px 0 -6px var(--moon-shade, rgba(0,0,0,.12)) inset, 10px 18px 0 -14px var(--moon-shade, rgba(0,0,0,.12)) inset; opacity: 0; transform: scale(0.85); } html[data-sky="night"] .sky .sun { opacity: 0; transform: scale(0.85); } html[data-sky="night"] .sky .moon { opacity: 1; transform: scale(1); } /* clouds — pure CSS puff shapes, drifting */ .sky .clouds { position: absolute; inset: 0; transition: opacity 0.8s ease; } html[data-sky="night"] .sky .clouds { opacity: 0; } .cloud { position: absolute; background: var(--cloud); border-radius: 100px; filter: drop-shadow(0 10px 12px var(--cloud-shadow)); opacity: 0.9; } .cloud::before, .cloud::after { content: ""; position: absolute; background: var(--cloud); border-radius: 50%; } .cloud::before { width: 60%; height: 140%; top: -55%; left: 8%; } .cloud::after { width: 45%; height: 110%; top: -40%; right: 12%; } /* higher clouds (smaller top%) sit further away, so they drift slower; lower clouds are closer and move noticeably faster (parallax) */ .cloud-3 { width: 200px; height: 54px; top: 8%; left: -260px; animation: drift 130s linear infinite; animation-delay: -60s; } .cloud-1 { width: 160px; height: 46px; top: 16%; left: -220px; animation: drift 100s linear infinite; } .cloud-2 { width: 110px; height: 34px; top: 26%; left: -180px; animation: drift 75s linear infinite; animation-delay: -20s; opacity: 0.75; } .cloud-4 { width: 90px; height: 28px; top: 36%; left: -150px; animation: drift 50s linear infinite; animation-delay: -10s; opacity: 0.65; } @keyframes drift { from { transform: translateX(0); } to { transform: translateX(calc(100vw + 300px)); } } /* stars — individually-placed dots, each twinkling on its own cycle */ .sky .stars { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; } html[data-sky="night"] .sky .stars { opacity: 1; } .star { position: absolute; border-radius: 50%; background: #fff; box-shadow: 0 0 4px 1px rgba(255, 255, 255, 0.65); opacity: 0.25; animation-name: twinkle; animation-timing-function: ease-in-out; animation-iteration-count: infinite; } @keyframes twinkle { 0%, 100% { opacity: 0.25; transform: scale(0.7); } 50% { opacity: 1; transform: scale(1); } } /* ---------- layout ---------- */ .wrap { max-width: 760px; margin: 0 auto; padding: 0 1.25rem 6rem; } .wrap.wrap-wide { max-width: 1040px; } .layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 2.5rem; align-items: start; } .site-header { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.25rem 1.5rem; margin: 0 0 3rem; background: var(--header-bg); backdrop-filter: blur(14px) saturate(1.4); -webkit-backdrop-filter: blur(14px) saturate(1.4); border-bottom: 1px solid var(--card-border); } .site-header .titles h1 { margin: 0; font-size: 1.5rem; letter-spacing: -0.01em; } .site-header .titles h1 a { color: inherit; text-decoration: none; } .site-header .titles p.tagline { margin: 0.15rem 0 0; color: var(--muted); font-size: 0.95rem; } .sky-toggle { flex: none; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--card-border); background: var(--card-bg); color: var(--text); display: grid; place-items: center; cursor: pointer; transition: transform 0.2s ease, background 0.5s ease; } .sky-toggle:hover { transform: scale(1.08); } .sky-toggle svg { width: 20px; height: 20px; } .sky-toggle .icon-moon { display: none; } html[data-sky="night"] .sky-toggle .icon-sun { display: none; } html[data-sky="night"] .sky-toggle .icon-moon { display: block; } main { padding-top: 0.5rem; } /* post cards */ .post-summary { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.5rem 1.75rem; margin-bottom: 1.5rem; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 12px 30px -18px var(--card-shadow); transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.5s ease, border-color 0.5s ease; } .post-summary:hover { transform: translateY(-3px); box-shadow: 0 18px 34px -16px var(--card-shadow); } .post-summary h2 { margin: 0 0 0.3rem; font-size: 1.35rem; letter-spacing: -0.01em; } .post-summary h2 a { color: var(--text); text-decoration: none; } .post-summary h2 a:hover { color: var(--accent); } .post-date { color: var(--muted); font-size: 0.82rem; margin-bottom: 0.8rem; } .post-excerpt { color: var(--text); opacity: 0.9; } .read-more { display: inline-block; margin-top: 0.9rem; font-size: 0.88rem; font-weight: 600; color: var(--accent); text-decoration: none; } .read-more:hover { text-decoration: underline; } .empty-state { text-align: center; color: var(--muted); font-style: italic; padding: 3rem 1rem; } /* archive sidebar */ .archive { position: sticky; top: 6.5rem; background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 1.25rem 1.4rem 1.5rem; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 12px 30px -18px var(--card-shadow); transition: background 0.5s ease, border-color 0.5s ease; max-height: calc(100vh - 8.5rem); overflow-y: auto; } .archive-title { margin: 0 0 0.9rem; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); } .archive-year { margin-bottom: 1.2rem; } .archive-year:last-child { margin-bottom: 0; } .archive-year h3 { margin: 0 0 0.4rem; font-size: 1.05rem; color: var(--text); } .archive-year ul { list-style: none; margin: 0; padding: 0; } .archive-year li { margin-bottom: 0.5rem; } .archive-year a { display: flex; gap: 0.55rem; font-size: 0.85rem; color: var(--text); text-decoration: none; opacity: 0.85; line-height: 1.4; } .archive-year a:hover { color: var(--accent); opacity: 1; } .archive-date { flex: none; color: var(--muted); font-variant-numeric: tabular-nums; } @media (max-width: 860px) { .layout { grid-template-columns: 1fr; } .archive { position: static; max-height: none; order: 2; margin-top: 0.5rem; } } /* single post */ .post-full { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: var(--radius); padding: 2rem 2.25rem 2.5rem; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); box-shadow: 0 12px 30px -18px var(--card-shadow); } .post-full h1 { margin: 0 0 0.3rem; font-size: 2rem; letter-spacing: -0.01em; } .post-content { margin-top: 1.5rem; } .post-content img { max-width: 100%; height: auto; border-radius: 12px; } .post-content pre { background: rgba(0, 0, 0, 0.06); padding: 1rem; overflow-x: auto; border-radius: 10px; } html[data-sky="night"] .post-content pre { background: rgba(255, 255, 255, 0.08); } .post-content blockquote { border-left: 3px solid var(--accent); margin-left: 0; padding-left: 1rem; color: var(--muted); } .post-content a { color: var(--accent); } .back-link { display: inline-block; margin-top: 1.75rem; font-size: 0.9rem; color: var(--accent); text-decoration: none; } .back-link:hover { text-decoration: underline; } .site-footer { margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--divider); color: var(--muted); font-size: 0.8rem; text-align: center; } a { color: var(--accent); } @media (prefers-reduced-motion: reduce) { .cloud, .star, .sky .orb, body, .sky, .clouds, .post-summary { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; } } @media (max-width: 520px) { .site-header { padding: 1rem; } .post-summary { padding: 1.25rem 1.4rem; } .post-full { padding: 1.5rem 1.5rem 2rem; } .sky .orb { width: 80px; height: 80px; top: 6%; right: 8%; } }