:root{--bg:#f4f7fb;--panel:#fff;--text:#172033;--muted:#6b7280;--primary:#2563eb;--danger:#dc2626;--border:#e5e7eb;--sidebar:#111827}*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}a{text-decoration:none;color:inherit}.layout{min-height:100vh;display:flex}.sidebar{width:250px;background:var(--sidebar);color:#fff;padding:24px 18px;position:fixed;inset:0 auto 0 0;z-index:20}.brand{font-size:20px;font-weight:800;letter-spacing:.5px;margin-bottom:24px}.user-mini{padding:14px;background:rgba(255,255,255,.07);border-radius:12px;margin-bottom:18px}.user-mini span{display:block;color:#9ca3af;font-size:13px;margin-top:4px}.sidebar nav{display:grid;gap:7px}.sidebar nav a{padding:11px 13px;border-radius:9px;color:#d1d5db}.sidebar nav a:hover{background:#1f2937;color:#fff}.sidebar nav .logout{margin-top:16px;color:#fca5a5}.content{margin-left:250px;width:calc(100% - 250px);padding:26px}.topbar{display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid var(--border);padding:14px 18px;border-radius:14px;margin-bottom:24px}.menu-btn{display:none;border:0;background:none;font-size:24px}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:18px 0 24px}.stat,.card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 8px 30px rgba(15,23,42,.04)}.stat span{display:block;color:var(--muted);font-size:14px}.stat strong{display:block;font-size:25px;margin-top:8px}.card{margin-bottom:20px}.card h2{margin-top:0}.card-head{display:flex;align-items:center;justify-content:space-between}.grid-2{display:grid;grid-template-columns:1fr 1.5fr;gap:20px}.form-stack{display:grid;gap:14px}.form-stack label{font-weight:600;font-size:14px}.form-stack input,.form-stack select,.form-stack textarea,select{width:100%;padding:11px 12px;margin-top:6px;border:1px solid #d1d5db;border-radius:9px;background:#fff}.form-stack textarea{min-height:90px;resize:vertical}.btn{border:0;border-radius:9px;padding:10px 14px;font-weight:700;cursor:pointer;background:#e5e7eb}.btn-primary{background:var(--primary);color:#fff}.btn-danger{background:var(--danger);color:#fff}.btn-small{padding:7px 10px;font-size:12px}.inline-form{display:inline-flex;align-items:center;gap:6px}.inline-form select{margin:0;min-width:120px;padding:7px}.table-wrap{overflow:auto}table{border-collapse:collapse;width:100%;font-size:14px}th,td{text-align:left;padding:13px 12px;border-bottom:1px solid var(--border);white-space:nowrap}th{color:var(--muted);font-size:12px;text-transform:uppercase}.badge{padding:5px 8px;border-radius:999px;background:#eef2ff;color:#3730a3;font-size:12px}.alert{padding:13px 15px;border-radius:10px;margin-bottom:16px}.alert-success{background:#dcfce7;color:#166534}.alert-error{background:#fee2e2;color:#991b1b}.auth-page{min-height:100vh;display:grid;place-items:center;padding:20px;background:linear-gradient(135deg,#0f172a,#1d4ed8)}.auth-card{width:min(420px,100%);background:#fff;border-radius:20px;padding:30px;box-shadow:0 24px 60px rgba(0,0,0,.25)}.auth-logo{font-weight:900;color:var(--primary);letter-spacing:2px}.auth-card h1{margin-bottom:6px}.auth-card p{color:var(--muted);margin-top:0}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.product-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px}.product-icon{width:44px;height:44px;border-radius:12px;background:#dbeafe;color:#1d4ed8;display:grid;place-items:center}.product-card p{color:var(--muted);min-height:44px}.price{font-size:22px;font-weight:800;margin:14px 0 5px}.buy-form{display:flex;gap:8px;margin-top:16px}.buy-form input{width:72px;padding:10px;border:1px solid #d1d5db;border-radius:9px}@media(max-width:900px){.sidebar{transform:translateX(-100%);transition:.2s}.sidebar.open{transform:translateX(0)}.content{margin-left:0;width:100%;padding:16px}.menu-btn{display:block}.stats-grid{grid-template-columns:1fr 1fr}.grid-2{grid-template-columns:1fr}.product-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.stats-grid,.product-grid{grid-template-columns:1fr}.content h1{font-size:24px}.auth-card{padding:22px}}