:root{font-family:Inter,Microsoft JhengHei,sans-serif;color:#172033;background:#f3f6fa}*{box-sizing:border-box}body{margin:0}.app{display:grid;grid-template-columns:230px 1fr;min-height:100vh}aside{background:#111c32;color:#fff;padding:24px;display:flex;flex-direction:column;gap:8px}aside small{color:#8fb7ff;margin-bottom:24px}aside a{color:#bfcbe0;text-decoration:none;padding:11px;border-radius:8px}aside a.active,aside a:hover{background:#263b60;color:#fff}section header{height:64px;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid #e0e7ef}main{padding:28px}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px}.cards article,.panel{background:#fff;border:1px solid #dfe7f0;border-radius:12px;padding:22px;box-shadow:0 5px 18px #1d355708}.toolbar{background:#eaf2ff;padding:14px;border-radius:10px;margin:14px 0}.split{display:grid;grid-template-columns:1fr 2fr;gap:18px}.login{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#e9f2ff,#fff)}.login form{width:360px;background:#fff;padding:32px;border-radius:16px;display:grid;gap:14px;box-shadow:0 20px 50px #16365c22}input,button{padding:12px;border:1px solid #ccd7e5;border-radius:8px}button{cursor:pointer}.error{color:#c52828}