:root{--paper:#eef1f6;--card:#fff;--ink:#16233e;--ink-soft:#51607a;--ink-faint:#8593ac;--grid:rgba(22,35,62,.1);--border:rgba(22,35,62,.14);--accent:#2f5fa8;--accent-soft:#e3ecfa;--red:#c7304c;--red-soft:#fbe4e8;--green:#2e9563;--green-soft:#dff3e8;--amber:#b8791f;--amber-soft:#f6e8c9;--shadow:0 1px 2px rgba(22,35,62,.06),0 8px 24px -12px rgba(22,35,62,.18);--font-serif:"Noto Serif SC","Songti SC",serif;--font-sans:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,monospace}@media (prefers-color-scheme:dark){:root{--paper:#121826;--card:#1b2434;--ink:#e7ebf3;--ink-soft:#aab4c8;--ink-faint:#6e7a93;--grid:rgba(231,235,243,.08);--border:rgba(231,235,243,.14);--accent:#7ea6e8;--accent-soft:rgba(126,166,232,.16);--red:#e58297;--red-soft:rgba(229,130,151,.15);--green:#68cb99;--green-soft:rgba(104,203,153,.14);--amber:#e3b268;--amber-soft:hsla(36,69%,65%,.14);--shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px -12px rgba(0,0,0,.5)}}*{box-sizing:border-box}body,html{padding:0;margin:0}body{background:var(--paper);color:var(--ink);font-family:var(--font-sans)}h1,h2,h3{font-family:var(--font-serif);margin:0}button{font-family:inherit}a{color:var(--accent)}.app{max-width:880px;margin:0 auto;padding:20px 16px 48px;gap:18px}.app,.topbar{display:flex;flex-direction:column}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:10;background:var(--paper);padding:14px 0 10px;gap:14px;border-bottom:1px solid var(--border)}.brand{justify-content:space-between}.brand,.brand-left{gap:12px}.brand,.brand-left,.stamp-mini{display:flex;align-items:center}.stamp-mini{flex:none;width:40px;height:40px;border-radius:50%;border:2px dashed var(--red);color:var(--red);justify-content:center;font-family:var(--font-serif);font-weight:700;font-size:17px;transform:rotate(-8deg)}.brand-text h1{font-size:19px;font-weight:700}.brand-text p{margin:2px 0 0;font-size:12.5px;color:var(--ink-soft)}.signout-btn{border:1px solid 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