:root{--bg:#f4f7fb;--primary:#1f5eff;--dark:#172033;--muted:#6c7586;--card:#fff;--border:#e5eaf2}*{box-sizing:border-box}body{margin:0;background:var(--bg);font-family:Arial,Helvetica,sans-serif;color:#1f2937}.login-page{display:grid;place-items:center;height:100vh}.login-card,.card{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:0 8px 24px #0001;padding:24px}.login-card{width:380px}.layout{display:flex;min-height:100vh}.sidebar{width:260px;background:#101827;color:white;padding:22px;position:fixed;height:100vh}.brand{font-weight:700;font-size:20px;margin-bottom:25px}.sidebar a{display:block;color:#dbeafe;text-decoration:none;padding:11px 12px;border-radius:10px;margin:4px 0}.sidebar a:hover{background:#1d2a44}.content{margin-left:260px;padding:24px;width:calc(100% - 260px)}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:16px}.metric{background:white;border:1px solid var(--border);border-radius:16px;padding:18px}.metric b{font-size:28px;display:block}.table{width:100%;border-collapse:collapse;background:white;border-radius:14px;overflow:hidden}.table th,.table td{border-bottom:1px solid var(--border);padding:10px;text-align:left;font-size:13px}.table th{background:#f8fafc}input,select,textarea{width:100%;padding:10px;border:1px solid var(--border);border-radius:10px;margin:5px 0 12px}.btn{display:inline-block;border:0;background:var(--primary);color:white;padding:10px 14px;border-radius:10px;text-decoration:none;cursor:pointer}.btn.secondary{background:#64748b}.btn.danger{background:#dc2626}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px}.alert{padding:12px;border-radius:10px;background:#fee2e2;color:#991b1b;margin-bottom:12px}.ok{background:#dcfce7;color:#166534}.badge{padding:4px 8px;border-radius:20px;background:#e0e7ff;color:#3730a3;font-size:12px}