:root{--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--ok: #16a34a;--bg: #f1f5f9;--card: #ffffff;--text: #0f172a;--muted: #64748b;--border: #e2e8f0}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Noto Sans Thai,system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text)}.app{min-height:100vh}.navbar{display:flex;align-items:center;gap:24px;padding:0 24px;height:56px;background:#0f172a;color:#fff}.navbar-title{font-weight:700;font-size:18px;letter-spacing:.3px}.navbar nav{display:flex;gap:8px}.nav-link{color:#cbd5e1;text-decoration:none;padding:6px 14px;border-radius:6px;font-size:15px}.nav-link:hover{background:#ffffff14;color:#fff}.nav-link.active{background:var(--primary);color:#fff}.container{max-width:960px;margin:0 auto;padding:24px 16px 48px}h1{font-size:24px;margin:8px 0 16px}h2{font-size:18px;margin:0 0 12px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;margin-bottom:20px;box-shadow:0 1px 2px #0f172a0d}.alert{padding:10px 14px;border-radius:8px;margin-bottom:16px;cursor:pointer;font-size:14px}.alert.ok{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}.alert.error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}.field-row{display:flex;align-items:center;gap:12px;margin-bottom:16px}.field-row label{font-weight:600}select,input{padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:15px;background:#fff;color:var(--text)}select:focus,input:focus{outline:2px solid var(--primary);outline-offset:0;border-color:transparent}.inputs-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:20px}.input-box{display:flex;flex-direction:column;gap:6px}.input-box label{font-weight:600;font-size:15px}.input-box .unit{color:var(--muted);font-weight:400;font-size:13px}.input-box input{padding:12px;font-size:18px;width:100%}.btn-primary{background:var(--primary);color:#fff;border:none;border-radius:8px;padding:11px 24px;font-size:16px;font-weight:600;cursor:pointer}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{background:#fff;color:var(--text);border:1px solid var(--border);border-radius:8px;padding:9px 16px;font-size:14px;cursor:pointer}.btn-secondary:hover{background:var(--bg)}.btn-small{border:1px solid var(--border);background:#fff;border-radius:6px;padding:4px 10px;font-size:13px;cursor:pointer;margin-right:6px}.btn-small:hover{background:var(--bg)}.btn-ok{color:var(--ok);border-color:#bbf7d0}.btn-danger{color:var(--danger);border-color:#fecaca}.data-table{width:100%;border-collapse:collapse;font-size:15px}.data-table th,.data-table td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border)}.data-table th{color:var(--muted);font-weight:600;font-size:13px;text-transform:uppercase;letter-spacing:.4px}.data-table tr:last-child td{border-bottom:none}.empty{text-align:center;color:var(--muted);padding:24px}.edit-input{width:140px}.filters{display:flex;flex-wrap:wrap;align-items:flex-end;gap:16px}.filters label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted);font-weight:600}.add-row{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}.admin-head{display:flex;align-items:center;justify-content:space-between}.login-card{max-width:360px}.login-card form{display:flex;flex-direction:column;gap:12px}.login-card label{font-weight:600}