:root{--bg:#f5f6fa;--panel:#fff;--text:#18273e;--muted:#546477;--line:#d8e0e8;--accent:#146a62;--soft:#e7f4ef;--code:#15283c;--codeText:#d9f3e6;--warn:#a93c29}*{box-sizing:border-box}body{margin:0;font:16px/1.65 system-ui,sans-serif;background:var(--bg);color:var(--text)}body.dark{--bg:#101a27;--panel:#19283b;--text:#ecf2f8;--muted:#b3c4d4;--line:#3a4c60;--accent:#83dec7;--soft:#243e43;--code:#0c1724;--warn:#ffaf95}a{color:var(--accent);text-underline-offset:4px}button,input,select,textarea{font:inherit;color:inherit}button{border:1px solid var(--line);border-radius:9px;padding:10px 15px;min-height:44px;background:var(--panel);cursor:pointer;font-weight:650}button:hover{border-color:var(--accent);background:var(--soft)}button:disabled{opacity:.5;cursor:not-allowed}.primary{background:#146a62;color:white;border-color:#146a62}.primary:hover{background:#0c514b;color:#fff}*:focus-visible{outline:3px solid 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