:root{--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--danger-dark: #b91c1c;--text: #1f2937;--text-muted: #6b7280;--border: #e5e7eb;--bg: #f3f4f6;--surface: #ffffff;--radius: 8px}*{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);line-height:1.6}h1{font-size:1.5rem;margin:0 0 1rem}code{background:var(--bg);padding:.1rem .35rem;border-radius:4px;font-size:.85em}.container{max-width:960px;margin:0 auto;padding:2rem 1rem}.page-center{text-align:center;padding:2rem;color:var(--text-muted)}.card,.auth-card{background:var(--surface);border-radius:var(--radius);padding:2rem;box-shadow:0 1px 3px #00000014}.auth-card{max-width:400px;margin:2rem auto}.card-header{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:.5rem}.user-count{color:var(--text-muted);font-size:.9rem}.navbar{background:var(--surface);border-bottom:1px solid var(--border);padding:.75rem 1.5rem;display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap}.navbar-brand{font-weight:700;font-size:1.1rem;color:var(--primary);text-decoration:none}.navbar-links{display:flex;gap:1rem;flex:1}.navbar-links a{color:var(--text-muted);text-decoration:none;padding:.25rem 0;border-bottom:2px solid transparent}.navbar-links a:hover{color:var(--text)}.navbar-links a.active{color:var(--primary);border-bottom-color:var(--primary)}.navbar-user{display:flex;align-items:center;gap:.75rem}.navbar-username{display:flex;align-items:center;gap:.4rem;font-size:.9rem}.avatar{border-radius:50%;object-fit:cover;display:inline-flex;align-items:center;justify-content:center;background:var(--border);flex-shrink:0}.avatar-sm{width:32px;height:32px;font-size:.85rem}.avatar-lg{width:140px;height:140px;font-size:3rem}.avatar-placeholder{background:var(--primary);color:#fff;font-weight:600}label{display:block;margin:1rem 0 .35rem;font-size:.875rem;font-weight:600}input[type=text],input[type=email],input[type=password]{width:100%;padding:.6rem .75rem;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;font-family:inherit}input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.file-input{margin-top:1rem;font-size:.85rem;max-width:100%}.readonly-text{color:var(--text-muted);font-size:.9rem}.hint{color:var(--text-muted);font-size:.8rem;margin:.5rem 0 0}.btn{padding:.6rem 1.1rem;border:none;border-radius:var(--radius);font-size:.95rem;font-family:inherit;cursor:pointer;transition:background .15s}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff;margin-top:1.5rem}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:var(--danger-dark)}.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--bg)}.btn-sm{padding:.35rem .75rem;font-size:.85rem}.btn-block{width:100%}.button-row{display:flex;gap:.5rem;margin-top:1rem;flex-wrap:wrap}.button-row .btn-primary{margin-top:0}.alert{padding:.75rem 1rem;border-radius:var(--radius);margin-bottom:1rem;font-size:.9rem}.alert-error{background:#fee2e2;color:#991b1b;border:1px solid #fecaca}.alert-success{background:#dcfce7;color:#166534;border:1px solid #bbf7d0}.badge{display:inline-block;padding:.1rem .5rem;border-radius:999px;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.03em}.badge-admin{background:#fef3c7;color:#92400e}.badge-user{background:#e0e7ff;color:#3730a3}.profile-layout{display:grid;grid-template-columns:200px 1fr;gap:2.5rem;align-items:start}.profile-avatar-section{text-align:center}@media (max-width: 640px){.profile-layout{grid-template-columns:1fr;gap:1.5rem}}.table-wrapper{overflow-x:auto;margin-top:1rem}.user-table{width:100%;border-collapse:collapse;font-size:.9rem;min-width:640px}.user-table th,.user-table td{padding:.7rem .6rem;text-align:left;border-bottom:1px solid var(--border);vertical-align:middle}.user-table th{font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);background:var(--bg)}.user-table tbody tr:hover{background:#fafafa}.row-self{background:#fffbeb}.self-tag{margin-left:.4rem;font-size:.7rem;color:#92400e;background:#fef3c7;padding:.05rem .4rem;border-radius:999px}.cell-muted{color:var(--text-muted);white-space:nowrap}.role-select{padding:.3rem .5rem;border:1px solid var(--border);border-radius:var(--radius);font-family:inherit;font-size:.85rem;background:var(--surface);cursor:pointer}.role-select:disabled{cursor:not-allowed;opacity:.6}.auth-switch{text-align:center;margin-top:1.25rem;font-size:.9rem;color:var(--text-muted)}.auth-switch a{color:var(--primary);text-decoration:none;font-weight:600}