:root { --ink: #f5f5f5; --mid: #9a9a9a; --dim: #4a4a4a; --line: #2a2a2a; --void: #050505; } * { margin: 0; padding: 0; box-sizing: border-box; } html { /* On (not ) so it always paints the full canvas — on the body it clips to content height, slicing the glow with a hard edge on short pages. */ background: radial-gradient(ellipse at 50% 120%, #161616 0%, #0b0b0b 45%, var(--void) 100%) fixed var(--void); color-scheme: dark; } html, body { min-height: 100%; } body { color: var(--ink); font-family: ui-sans-serif, system-ui, "Segoe UI", Helvetica, Arial, sans-serif; } /* ---------- page transitions ---------- */ /* The title and the black hole morph between their landing-page (big, centred) and tool-page (small, top) positions; everything else fades. */ @view-transition { navigation: auto; } h1 { view-transition-name: site-title; } .eclipse { view-transition-name: site-hole; } ::view-transition-group(site-title), ::view-transition-group(site-hole) { animation-duration: 0.65s; animation-timing-function: cubic-bezier(0.45, 0, 0.2, 1); } ::view-transition-old(root), ::view-transition-new(root) { animation-duration: 0.35s; } @media (prefers-reduced-motion: reduce) { ::view-transition-group(*), ::view-transition-image-pair(*), ::view-transition-old(*), ::view-transition-new(*) { animation: none !important; } } /* ---------- starfield ---------- */ #sky { position: fixed; inset: 0; pointer-events: none; z-index: 0; } .star { position: absolute; background: #fff; border-radius: 50%; animation: twinkle var(--tw, 4s) ease-in-out infinite alternate; animation-delay: var(--td, 0s); } @keyframes twinkle { from { opacity: var(--lo, 0.15); } to { opacity: var(--hi, 0.9); transform: scale(1.25); } } .sparkle { position: absolute; width: 18px; height: 18px; opacity: 0.85; animation: spin 14s linear infinite, twinkle 3s ease-in-out infinite alternate; } @keyframes spin { to { transform: rotate(360deg); } } .shooting-star { position: absolute; width: 120px; height: 1px; background: linear-gradient(90deg, rgba(255,255,255,0.9), rgba(255,255,255,0)); opacity: 0; animation: shoot 9s ease-in infinite; animation-delay: var(--sd, 0s); transform: rotate(-30deg); } @keyframes shoot { 0% { opacity: 0; translate: 0 0; } 3% { opacity: 0.9; } 8% { opacity: 0; translate: -40vw 23vw; } 100% { opacity: 0; translate: -40vw 23vw; } } /* ---------- eclipse motif ---------- */ .eclipse { position: relative; width: clamp(140px, 24vmin, 220px); aspect-ratio: 1; margin: 0 auto 3rem; } .eclipse.small { width: 56px; margin: 0; } .eclipse .corona { position: absolute; inset: 0; border-radius: 50%; background: #fff; filter: blur(18px); opacity: 0.55; animation: breathe 6s ease-in-out infinite alternate; } .eclipse.small .corona { filter: blur(7px); } @keyframes breathe { from { opacity: 0.35; transform: scale(0.97); } to { opacity: 0.65; transform: scale(1.04); } } .eclipse .disc { position: absolute; inset: 6%; border-radius: 50%; background: var(--void); box-shadow: inset 0 0 30px rgba(255, 255, 255, 0.12); } .eclipse .orbit { position: absolute; inset: -26%; border: 1px solid rgba(255, 255, 255, 0.14); border-radius: 50%; animation: spin 24s linear infinite; } .eclipse .orbit::after { content: ""; position: absolute; top: -3px; left: 50%; width: 6px; height: 6px; border-radius: 50%; background: #dcdcdc; box-shadow: 0 0 8px 2px rgba(255, 255, 255, 0.45); } /* ---------- type & controls ---------- */ h1 { font-size: clamp(2.4rem, 7vmin, 4.2rem); font-weight: 200; letter-spacing: 0.42em; text-indent: 0.42em; text-transform: lowercase; } .tld { color: var(--dim); font-weight: 200; } .pill { display: inline-block; padding: 0.8rem 2.6rem; border: 1px solid var(--dim); border-radius: 999px; color: var(--ink); text-decoration: none; font-size: 0.8rem; letter-spacing: 0.35em; text-indent: 0.35em; text-transform: uppercase; transition: border-color 0.3s, box-shadow 0.3s, background 0.3s; } .pill:hover, .pill:focus-visible { border-color: var(--ink); background: rgba(255, 255, 255, 0.06); box-shadow: 0 0 24px rgba(255, 255, 255, 0.15); outline: none; } /* ---------- tool pages ---------- */ body.tool { display: flex; flex-direction: column; align-items: center; padding: 2.5rem 1.25rem 5rem; } a.site { text-decoration: none; color: inherit; } header.site { position: relative; z-index: 1; display: flex; align-items: center; gap: 1.1rem; margin-bottom: 2.5rem; } header.site h1 { font-size: 1.1rem; letter-spacing: 0.35em; text-indent: 0; } header.site .sub { color: var(--mid); font-size: 0.7rem; letter-spacing: 0.3em; text-transform: uppercase; margin-top: 0.3rem; } body.tool main { position: relative; z-index: 1; width: min(680px, 100%); display: flex; flex-direction: column; gap: 1.5rem; } .card { border: 1px solid var(--line); border-radius: 14px; background: rgba(10, 10, 10, 0.72); backdrop-filter: blur(3px); padding: 1.6rem; } .card h2 { font-size: 0.75rem; font-weight: 400; letter-spacing: 0.3em; text-transform: uppercase; color: var(--mid); margin-bottom: 1.2rem; } .fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 1rem; } .fields label { display: flex; flex-direction: column; gap: 0.45rem; font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--mid); } input[type="number"] { background: #000; border: 1px solid var(--dim); border-radius: 8px; color: var(--ink); font: inherit; font-size: 1.05rem; padding: 0.6rem 0.8rem; width: 100%; -moz-appearance: textfield; appearance: textfield; } input[type="number"]::-webkit-outer-spin-button, input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; } input[type="number"]:focus-visible { outline: none; border-color: var(--ink); box-shadow: 0 0 14px rgba(255, 255, 255, 0.12); } .hero-result { display: flex; align-items: baseline; gap: 0.9rem; flex-wrap: wrap; } .hero-result .big { font-size: 3.2rem; font-weight: 200; line-height: 1; } .hero-result .unit { color: var(--mid); letter-spacing: 0.25em; text-transform: uppercase; font-size: 0.75rem; } .hero-note { margin-top: 0.9rem; color: var(--mid); font-size: 0.85rem; line-height: 1.55; } .hero-note strong { color: var(--ink); font-weight: 500; } .other-tools { position: relative; z-index: 1; margin-top: 2.5rem; display: flex; gap: 1rem; justify-content: center; } @media (prefers-reduced-motion: reduce) { .star, .sparkle, .shooting-star, .corona, .orbit { animation: none !important; } .star { opacity: 0.6; } .shooting-star { display: none; } }