:root{--bg: #f6f7f9;--card: #ffffff;--text: #1b1d21;--muted: #6b7280;--line: #e5e7eb;--accent: #2f6db3;--accent-soft: #e6eef8;--danger: #c0392b;--warn-bg: #fff4e5;color-scheme:light dark}@media (prefers-color-scheme: dark){:root{--bg: #121316;--card: #1c1e22;--text: #e8e9ec;--muted: #9aa0a9;--line: #2c2f35;--accent: #7fb0ea;--accent-soft: #1f2a38;--danger: #ff7b6b;--warn-bg: #3a2c16}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.4 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}button,input,textarea{font:inherit;color:inherit}.app{max-width:640px;margin:0 auto;min-height:100vh}.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:calc(10px + env(safe-area-inset-top)) 16px 10px;background:var(--bg);border-bottom:1px solid var(--line)}.top h1{font-size:20px;margin:0}.icon{background:none;border:0;font-size:22px;padding:4px 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