:root{--bg:#101014;--card:#1a1a21;--line:#2a2a34;--text:#f7f7fb;--muted:#9898aa;--accent:#ff424f;--soft:#25212b;--green:#9ee1b5;--shadow:0 16px 50px #0003;color-scheme:dark}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Segoe UI",Arial,sans-serif;font-size:15px;line-height:1.5}body.light{--bg:#f6f6fa;--card:#fff;--line:#e4e4ec;--text:#1b1b26;--muted:#707084;--soft:#eeeaf2;--shadow:0 16px 50px #2221;color-scheme:light}button,input,textarea,select{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button,a{color:inherit}button{cursor:pointer;border:0}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid 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.15s}.guide-copy{flex:1;min-width:0}.meta{display:flex;gap:8px;align-items:center;font-size:11px;color:var(--muted);margin-top:7px}.tag{color:var(--accent);font-size:10px}.chev{color:var(--muted);width:16px}.banner{margin-top:25px;padding:20px;border:1px solid var(--line);border-radius:18px;display:flex;gap:14px;align-items:center;background:linear-gradient(120deg,var(--card),var(--soft))}.banner p{font-size:12px;color:var(--muted);margin-top:5px}.banner>svg{color:var(--green)}.footnote{text-align:center;color:var(--muted);font-size:10px;margin:26px 0 0}.nav{position:fixed;z-index:8;bottom:18px;left:50%;transform:translateX(-50%);display:flex;justify-content:space-around;width:min(540px,calc(100% - 30px));padding:9px 6px;background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:0 10px 50px #0005;padding-bottom:max(9px,env(safe-area-inset-bottom))}.nav button{color:var(--muted);display:flex;align-items:center;flex-direction:column;gap:4px;padding:8px 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