:root{--primary: #0056d2;--bg: #f3f4f6;--white: #ffffff;--text: #111827;--text-muted: #4b5563;--font: "Prompt", "Noto Sans Thai", sans-serif;--radius: 12px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background-color:var(--bg);color:var(--text);padding:16px}.container{max-width:500px;margin:0 auto}.card{background:var(--white);padding:24px;border-radius:var(--radius);box-shadow:0 4px 12px #0000000d;margin-bottom:20px}p{font-size:14px;color:var(--text-muted);margin-bottom:24px}label{display:block;font-size:14px;font-weight:500;margin-bottom:8px}.input{width:100%;padding:12px;border:1px solid #d1d5db;border-radius:8px;font-size:16px;font-family:inherit}.input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #0056d21a}.btn{width:100%;padding:14px;background-color:var(--primary);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:opacity .2s}.btn:active{opacity:.8}.success-message{text-align:center;color:#10b981;padding:40px 0}:root{--primary: #2c3e50;--secondary: #34495e;--accent: #3498db;--success: #27ae60;--warning: #f39c12;--bg: #f5f7f9;--white: #ffffff;--text: #2c3e50;--text-muted: #7f8c8d}body{margin:0;padding:0;font-family:Inter,sans-serif;background-color:var(--bg);color:var(--text)}.container{max-width:500px;margin:0 auto;padding:20px;min-height:100vh}h1{font-size:24px;margin-bottom:8px;color:var(--primary)}p{font-size:14px;color:var(--text-muted);line-height:1.5}.card{background:var(--white);border-radius:16px;padding:24px;box-shadow:0 4px 6px #0000000d;margin-top:20px;text-align:left}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}.input{width:100%;padding:12px;border:1px solid #ddd;border-radius:8px;font-size:16px;box-sizing:border-box}.btn{width:100%;padding:14px;background-color:var(--primary);color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:.3s}.btn:disabled{background-color:#bdc3c7}.btn-secondary{background-color:#ecf0f1;color:var(--primary);margin-top:10px}.success-message{text-align:center;margin-top:100px}.staff-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:15px;border-bottom:1px solid #ddd}.badge-online{background-color:var(--success);color:#fff;padding:4px 8px;border-radius:12px;font-size:11px;font-weight:700}.btn-sm{padding:8px;background-color:var(--accent);color:#fff;border:none;border-radius:6px;font-size:13px;cursor:pointer}