/* ============================================================
   MtaaLink - Layout Styles
   ============================================================ */

.app-container {
    display: flex;
    min-height: 100vh;
}

/* ----- Sidebar ----- */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: white;
    border-right: 1px solid var(--gray-200);
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
    z-index: 1000;
}

.sidebar-brand {
    padding: var(--spacing-lg) var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    min-height: var(--header-height);
    display: flex;
    align-items: center;
}
.brand-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}
.brand-tagline {
    font-size: var(--font-size-xs);
    color: var(--gray-400);
    margin-left: var(--spacing-sm);
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-sm);
    overflow-y: auto;
}
.nav-section {
    margin-bottom: var(--spacing-lg);
}
.nav-label {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 var(--spacing-md);
    margin-bottom: var(--spacing-xs);
}
.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--gray-600);
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: var(--font-size-sm);
    font-weight: 500;
}
.nav-link:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}
.nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.sidebar-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
}
.user-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}
.user-info {
    flex: 1;
    min-width: 0;
}
.user-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: block;
    color: var(--gray-900);
}
.user-role {
    font-size: var(--font-size-xs);
    color: var(--gray-500);
}
.logout-btn {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
    font-size: var(--font-size-sm);
}
.logout-btn:hover {
    color: var(--danger);
    background: var(--danger-light);
}

/* ----- Main Content ----- */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.top-header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(8px);
}
.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: var(--font-size-lg);
    cursor: pointer;
    color: var(--gray-600);
    padding: var(--spacing-xs);
}
.menu-toggle:hover {
    color: var(--gray-900);
}
.header-left h1 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}
.header-search {
    display: flex;
    align-items: center;
    background: var(--gray-50);
    border-radius: var(--radius-md);
    padding: 0 var(--spacing-sm);
    border: 1px solid var(--gray-200);
    transition: border-color 0.2s;
}
.header-search:focus-within {
    border-color: var(--primary);
}
.header-search input {
    border: none;
    background: none;
    padding: var(--spacing-sm) var(--spacing-sm);
    font-size: var(--font-size-sm);
    outline: none;
    width: 180px;
    color: var(--gray-800);
}
.header-search input::placeholder {
    color: var(--gray-400);
}
.header-btn {
    background: none;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-base);
    color: var(--gray-500);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
}
.header-btn:hover {
    background: var(--gray-50);
    color: var(--gray-800);
}

.page-content {
    padding: var(--spacing-xl);
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
}

/* ----- Page Header ----- */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}
.page-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    .sidebar.open {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .menu-toggle {
        display: block;
    }
    .header-search input {
        width: 120px;
    }
    .page-content {
        padding: var(--spacing-md);
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .header-search {
        display: none;
    }
    .page-content {
        padding: var(--spacing-sm);
    }
    .top-header {
        padding: 0 var(--spacing-md);
    }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    .sidebar {
        background: #1E293B;
        border-right-color: #334155;
    }
    .sidebar-brand {
        border-bottom-color: #334155;
    }
    .top-header {
        background: rgba(30, 41, 59, 0.95);
        border-bottom-color: #334155;
    }
    .nav-link:hover {
        background: #334155;
    }
    .nav-link.active {
        background: #1E3A5F;
    }
    .header-search {
        background: #334155;
        border-color: #475569;
    }
    .header-search input {
        background: #334155;
        color: #E2E8F0;
    }
    .header-search input::placeholder {
        color: #94A3B8;
    }
    .sidebar-footer {
        border-top-color: #334155;
    }
}