/* Layout — sidebar + header + main */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.app-sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform var(--transition-normal);
}

.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--space-lg);
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.app-content {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
}

/* Sidebar nav */
.sidebar-logo {
    padding: var(--space-lg);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar-logo svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md) 0;
    overflow-y: auto;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 10px var(--space-lg);
    color: var(--sidebar-text);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
    border-left: 3px solid transparent;
}

.sidebar-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
    text-decoration: none;
}

.sidebar-link.active {
    background: var(--sidebar-active-bg);
    color: var(--sidebar-active);
    border-left-color: var(--sidebar-active);
}

.sidebar-icon {
    width: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-icon svg {
    opacity: 0.7;
}

.sidebar-link.active .sidebar-icon svg,
.sidebar-link:hover .sidebar-icon svg {
    opacity: 1;
}

.sidebar-section {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-top: var(--space-md);
}

.sidebar-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-logout {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--sidebar-text);
    font-size: var(--font-size-sm);
    width: 100%;
    text-align: left;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
    background: none;
    border: none;
    cursor: pointer;
}

.sidebar-logout:hover {
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    .app-sidebar {
        transform: translateX(-100%);
    }
    .app-sidebar.open {
        transform: translateX(0);
    }
    .app-main {
        margin-left: 0;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    line-height: 1.5;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover {
    background: var(--color-primary-hover);
}
.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

/* Cards */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    padding: var(--space-lg);
}

/* Form */
.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.form-input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    transition: border-color var(--transition-fast);
    background: var(--color-surface);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* ================================================
   Header — clean professional style
   ================================================ */
.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.header-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background var(--transition-fast);
}

.header-menu-toggle:hover {
    background: var(--color-bg);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-admin-name {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.header-admin-role {
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

@media (max-width: 768px) {
    .header-menu-toggle {
        display: inline-flex;
    }
}

/* ================================================
   KPI Cards — Dashboard
   ================================================ */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
}

.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.kpi-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.kpi-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
}

.kpi-card__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.kpi-card__icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.kpi-card__icon--primary {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

.kpi-card__icon--success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.kpi-card__icon--warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.kpi-card__icon--secondary {
    background: #ede9fe;
    color: #7c3aed;
}

.kpi-card__value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.2;
}

/* Status badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.status-badge--success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.status-badge--warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

/* System health */
.system-health {
    margin-top: var(--space-lg);
}

.system-health__title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.system-health__data {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    background: var(--color-bg);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

/* ================================================
   Login — polished, centered
   ================================================ */
.login-logo__icon {
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.login-logo__icon svg {
    width: 40px;
    height: 40px;
}

/* ================================================
   Empty states
   ================================================ */
.empty-state__icon {
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.empty-state__icon svg {
    opacity: 0.5;
}

/* ================================================
   Buttons — icon alignment
   ================================================ */
.btn svg,
.btn-copy svg,
.btn-ghost svg,
.toggle-reveal svg {
    vertical-align: middle;
}

.btn-copy,
.toggle-reveal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-secondary);
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.btn-copy:hover,
.toggle-reveal:hover {
    color: var(--color-primary);
}

/* ================================================
   Connection result — test panels
   ================================================ */
.connection-result {
    display: none;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-top: var(--space-md);
}

.connection-result.success {
    background: var(--color-success-light);
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.connection-result.error {
    background: var(--color-danger-light);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.connection-result svg {
    vertical-align: middle;
}