:root{--bg: #f4f6f9;--surface: #ffffff;--text: #1a1d23;--text-muted: #6b7280;--border: #e5e7eb;--primary: #2563eb;--primary-dark: #1d4ed8;--success: #16a34a;--danger: #dc2626;--warning: #d97706;--radius: 10px;--shadow: 0 1px 3px rgba(0,0,0,.08);color-scheme:light}[data-theme=dark]{--bg: #0f1115;--surface: #171a21;--text: #f1f3f5;--text-muted: #9aa1ac;--border: #2a2e37;--primary: #3b82f6;--primary-dark: #60a5fa;--shadow: 0 1px 3px rgba(0,0,0,.4);color-scheme:dark}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);transition:background .2s,color .2s}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}.app-layout{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:20px 14px;gap:4px}.sidebar-logo{font-weight:700;font-size:1.2rem;padding:0 10px 20px;color:var(--primary)}.nav-link{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius);color:var(--text-muted);font-weight:500;font-size:.92rem}.nav-link:hover{background:var(--bg);color:var(--text)}.nav-link.active{background:var(--primary);color:#fff}.main-content{flex:1;padding:24px 32px;max-width:100%;overflow-x:auto}.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow)}.grid{display:grid;gap:18px}.grid-4{grid-template-columns:repeat(4,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-2{grid-template-columns:repeat(2,1fr)}@media (max-width: 1000px){.grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}}@media (max-width: 640px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}.sidebar{display:none}}.stat-card{display:flex;flex-direction:column;gap:6px}.stat-label{font-size:.8rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.03em}.stat-value{font-size:1.6rem;font-weight:700}table{width:100%;border-collapse:collapse;font-size:.9rem}th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}th{color:var(--text-muted);font-weight:600;font-size:.78rem;text-transform:uppercase}tr:hover td{background:var(--bg)}.btn{padding:9px 16px;border-radius:var(--radius);border:none;font-weight:600;font-size:.88rem}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-danger{background:var(--danger);color:#fff}.btn-sm{padding:6px 10px;font-size:.8rem}input,select,textarea{width:100%;padding:9px 12px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:.9rem}label{font-size:.82rem;font-weight:600;color:var(--text-muted);margin-bottom:4px;display:block}.form-group{margin-bottom:14px}.badge{display:inline-block;padding:3px 10px;border-radius:999px;font-size:.75rem;font-weight:600}.badge-success{background:#dcfce7;color:#166534}.badge-danger{background:#fee2e2;color:#991b1b}.badge-muted{background:var(--bg);color:var(--text-muted)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:center;justify-content:center;z-index:50}.modal{background:var(--surface);border-radius:var(--radius);padding:24px;width:420px;max-width:90vw;max-height:85vh;overflow-y:auto}.page-title{font-size:1.4rem;font-weight:700;margin:0}.subtitle{color:var(--text-muted);font-size:.9rem;margin-top:2px}.search-bar{display:flex;gap:10px;margin-bottom:16px}.empty-state{text-align:center;padding:40px 20px;color:var(--text-muted)}.error-text{color:var(--danger);font-size:.85rem;margin-top:6px}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.login-card{width:380px;max-width:90vw}