*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
    --primary: #2563eb; --primary-dark: #1d4ed8; --success: #16a34a;
    --danger: #dc2626; --warning: #d97706; --bg: #f8fafc; --surface: #ffffff;
    --border: #e2e8f0; --text: #1e293b; --text-muted: #64748b;
    --radius: 8px; --shadow: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
}
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; }
.navbar { background: var(--surface); border-bottom: 1px solid var(--border); padding: 0.75rem 1.5rem; display: flex; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow); }
.nav-brand { font-weight: 700; font-size: 1.1rem; color: var(--primary); }
.nav-user { display: flex; align-items: center; gap: 1rem; }
.main-container { max-width: 900px; margin: 2rem auto; padding: 0 1rem; display: flex; flex-direction: column; gap: 1.5rem; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow); }
.card h2 { font-size: 1.1rem; font-weight: 600; margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.5rem 1rem; border-radius: var(--radius); border: 2px solid transparent; font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all 0.15s ease; text-decoration: none; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover:not(:disabled) { background: var(--primary-dark); }
.btn-success { background: var(--success); color: white; }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover:not(:disabled) { background: var(--bg); }
.btn-full { width: 100%; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 1rem; }
.btn-sm { padding: 0.25rem 0.75rem; font-size: 0.8rem; }
.btn-xs { padding: 0.15rem 0.5rem; font-size: 0.75rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.375rem; }
.form-group input { width: 100%; padding: 0.625rem 0.875rem; border: 2px solid var(--border); border-radius: var(--radius); font-size: 0.9rem; transition: border-color 0.15s; background: var(--surface); }
.form-group input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.15); }
.input-with-toggle { position: relative; }
.input-with-toggle input { padding-right: 3rem; }
.toggle-pwd { position: absolute; right: 0.75rem; top: 50%; transform: translateY(-50%); background: none; border: none; cursor: pointer; font-size: 1rem; }
.field-error { font-size: 0.8rem; color: var(--danger); margin-top: 0.25rem; display: block; }
.form-error { background: #fef2f2; border: 1px solid #fecaca; color: var(--danger); padding: 0.75rem; border-radius: var(--radius); font-size: 0.875rem; margin-bottom: 1rem; display: none; }
.form-error:not(:empty) { display: block; }
.data-table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
.data-table th { background: var(--bg); padding: 0.625rem 0.75rem; text-align: left; font-weight: 600; border-bottom: 2px solid var(--border); white-space: nowrap; }
.data-table td { padding: 0.625rem 0.75rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg); }
.profile-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; }
.profile-item { display: flex; flex-direction: column; gap: 0.25rem; }
.profile-item .label { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.password-alert { background: #fffbeb; border: 2px solid #fbbf24; border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1rem; }
.password-alert h3 { color: #92400e; margin-bottom: 0.5rem; }
.password-box { display: flex; align-items: center; gap: 0.75rem; margin: 0.75rem 0; }
.password-box code { font-family: 'Courier New', monospace; font-size: 1.4rem; font-weight: 700; letter-spacing: 0.1em; background: white; padding: 0.5rem 1rem; border: 2px solid #fbbf24; border-radius: var(--radius); flex: 1; text-align: center; }
.copy-info { font-size: 0.85rem; color: var(--text-muted); }
.password-inline { font-family: monospace; font-size: 0.85rem; background: var(--bg); padding: 0.2rem 0.5rem; border-radius: 4px; margin-right: 0.5rem; }
.toast { position: fixed; bottom: 2rem; right: 2rem; padding: 0.875rem 1.25rem; border-radius: var(--radius); color: white; font-weight: 600; font-size: 0.9rem; box-shadow: var(--shadow-md); z-index: 9999; animation: slideIn 0.3s ease; max-width: 380px; }
.toast-info { background: var(--primary); }
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }
.toast-warning { background: var(--warning); }
.toast-hide { animation: slideOut 0.3s ease forwards; }
@keyframes slideIn { from { transform: translateX(120%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
@keyframes slideOut { from { transform: translateX(0); opacity: 1; } to { transform: translateX(120%); opacity: 0; } }
.hidden { display: none !important; }
.section-desc { color: var(--text-muted); font-size: 0.875rem; margin-bottom: 1.25rem; }
@media (max-width: 640px) { .main-container { margin: 1rem auto; } .card { padding: 1rem; } .toast { right: 1rem; bottom: 1rem; left: 1rem; } }