/* ============================================
   SIMS 4 CC CREATOR — Layout
   Sidebar navigation + content area
   ============================================ */

/* ---- App Shell ---- */
.app {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: var(--z-base);
}

/* ---- Sidebar ---- */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    background: var(--gradient-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--surface-border);
    z-index: var(--z-sticky);
    transition: width var(--transition-base);
    overflow: hidden;
}

/* Logo Area */
.sidebar-logo {
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    border-bottom: 1px solid var(--surface-border);
    min-height: 80px;
}

.sidebar-logo .brand-logo {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    object-fit: contain;
    mix-blend-mode: multiply;
}

.sidebar-logo .logo-text {
    display: flex;
    flex-direction: column;
}

.sidebar-logo .logo-title {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: var(--text-lg);
    line-height: 1.1;
    background: var(--gradient-plumbob);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-logo .logo-subtitle {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
}

/* Navigation */
.sidebar-nav {
    flex: 1;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.nav-section-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: var(--space-md) var(--space-md) var(--space-sm);
    font-weight: 600;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    border: 1px solid transparent;
    user-select: none;
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-glass-hover);
    border-color: var(--surface-border);
}

.nav-item.active {
    color: var(--plumbob-green-light);
    background: rgba(57, 181, 74, 0.1);
    border-color: rgba(57, 181, 74, 0.2);
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: -17px;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--gradient-plumbob);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

.nav-item .nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
}

.nav-item .nav-label {
    font-size: var(--text-sm);
    font-weight: 500;
    white-space: nowrap;
}

.nav-item .nav-badge {
    margin-left: auto;
    background: var(--plumbob-green);
    color: var(--text-inverse);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    min-width: 20px;
    text-align: center;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--space-md);
    border-top: 1px solid var(--surface-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-footer .footer-logo {
    height: 24px;
    opacity: 0.6;
    mix-blend-mode: multiply;
}

.sidebar-footer .version-info {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-align: right;
}

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

/* Page Header */
.page-header {
    padding: var(--space-xl) var(--space-2xl);
    border-bottom: 1px solid var(--surface-border);
    background: var(--gradient-header);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(12px);
}

.page-header h1 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

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

/* Page Body */
.page-body {
    padding: var(--space-2xl);
}

/* Content Grid */
.content-grid {
    display: grid;
    gap: var(--space-lg);
}

.content-grid.cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.content-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.content-grid.cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ---- Page Transitions ---- */
.page-container {
    animation: pageIn 0.3s ease forwards;
}

@keyframes pageIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---- Responsive ---- */
@media (max-width: 1200px) {
    .content-grid.cols-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 968px) {

    .content-grid.cols-3,
    .content-grid.cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: var(--sidebar-collapsed);
    }

    .sidebar .logo-text,
    .sidebar .nav-label,
    .sidebar .nav-badge,
    .sidebar .nav-section-label {
        display: none;
    }

    .sidebar-logo {
        justify-content: center;
        padding: var(--space-md);
    }

    .nav-item {
        justify-content: center;
        padding: var(--space-md);
    }

    .nav-item.active::before {
        left: -13px;
    }

    .main-content {
        margin-left: var(--sidebar-collapsed);
    }

    .page-header,
    .page-body {
        padding: var(--space-lg);
    }

    .content-grid.cols-2,
    .content-grid.cols-3,
    .content-grid.cols-4 {
        grid-template-columns: 1fr;
    }
}