:root{color-scheme:light;--bg:#eef5fc;--text:#142338;--muted:#52677f;--faint:#596e85;--accent:#1765cf;--accent-hover:#0f54b3;--accent-soft:rgba(49,126,227,.09);--surface:hsla(0,0%,100%,.65);--surface-solid:#f7fbff;--input:hsla(0,0%,100%,.6);--border:rgba(71,108,151,.18);--border-strong:rgba(71,108,151,.3);--grid:rgba(71,108,151,.055);--glow:rgba(118,186,255,.3);--shadow:0 16px 52px -24px rgba(35,78,137,.27),inset 0 1px 0 hsla(0,0%,100%,.75);--success:#16734d;--warning:#996012;--danger:#bc354b}:root[data-theme=dark]{color-scheme:dark;--bg:#090d13;--text:#edf3fc;--muted:#a0adc0;--faint:#8a9ab0;--accent:#75afff;--accent-hover:#98c3ff;--accent-soft:rgba(103,166,255,.1);--surface:rgba(20,28,40,.66);--surface-solid:#131c28;--input:rgba(8,14,24,.54);--border:rgba(161,188,225,.14);--border-strong:rgba(161,188,225,.27);--grid:rgba(148,179,222,.045);--glow:rgba(37,100,191,.19);--shadow:0 16px 52px -24px rgba(0,0,0,.6),inset 0 1px 0 rgba(210,230,255,.05);--success:#6ccea2;--warning:#efba6a;--danger:#ff8c9d}*{box-sizing:border-box;padding:0;margin:0}body{min-height:100vh;color:var(--text);background:var(--bg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;-webkit-font-smoothing:antialiased}body:before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;background-image:radial-gradient(ellipse at 76% 29%,var(--glow),transparent 55%),linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:auto,64px 64px,64px 64px}button,input,textarea{font:inherit}a,button,input,textarea{-webkit-tap-highlight-color:transparent;transition:background-color .18s,border-color .18s,color .18s,box-shadow .18s}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}a{color:inherit;text-decoration:none}svg{flex-shrink:0}:focus-visible{outline:2px solid var(--accent);outline-offset:4px}input::placeholder,textarea::placeholder{color:var(--faint);opacity:1}::selection{background:var(--accent);color:var(--bg)}code{font-family:SFMono-Regular,Consolas,Liberation Mono,monospace}.site-header{border-bottom:1px solid var(--border);background:var(--surface);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}.header-inner{max-width:1160px;margin:auto;height:76px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:650;letter-spacing:-.6px;white-space:nowrap}.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--text);color:var(--bg);border-radius:7px}.brand-period{color:var(--accent)}.header-actions{display:flex;align-items:center;gap:26px}.header-caption{font-size:12px;color:var(--faint)}.theme-switch{display:flex;padding:3px;gap:2px;border:1px solid var(--border);border-radius:7px;background:var(--input)}.theme-switch button{border:1px solid transparent;border-radius:4px;width:30px;height:28px;display:grid;place-items:center;background:transparent;color:var(--faint)}.theme-switch button:hover{color:var(--text);background:var(--accent-soft)}.theme-switch button[aria-pressed=true]{background:var(--surface-solid);border-color:var(--border);color:var(--accent);box-shadow:0 1px 3px #0000000a}.skip-link{position:fixed;top:-100px;left:16px;z-index:10;padding:12px;background:var(--surface-solid);border:1px solid var(--border);border-radius:6px}.skip-link:focus{top:12px}@media (max-width:640px){.header-inner{padding:0 20px;height:68px}.header-caption{display:none}.brand{font-size:17px}}@media (prefers-reduced-motion:reduce){*,:after,:before{transition:none!important;animation:none!important}}