/* ============================================
   Layout — Topbar + Main Content
   ============================================ */

/* --- App Wrapper --- */
.app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* --- Topbar --- */
.topbar {
    background: var(--bg-primary);
    padding: 0 var(--space-xl);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.topbar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--text-primary);
    cursor: pointer;
    text-decoration: none;
}

.topbar-logo-icon {
    width: 32px;
    height: 32px;
    background: var(--accent-orange);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 800;
    font-size: var(--font-size-md);
}

.topbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.topbar-nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.topbar-nav-link:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.04);
}

.topbar-nav-link.active {
    color: var(--text-primary);
    font-weight: 600;
    background: var(--bg-card);
    box-shadow: var(--shadow-sm);
}

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

.topbar-search {
    position: relative;
    width: 260px;
}

.topbar-search input {
    width: 100%;
    padding: 8px 16px 8px 38px;
    background: var(--bg-card);
    border: 1.5px solid var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition-fast);
}

.topbar-search input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(79, 125, 243, 0.1);
}

.topbar-search input::placeholder {
    color: var(--text-tertiary);
}

.topbar-search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: var(--font-size-sm);
    pointer-events: none;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.topbar-action-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    background: var(--bg-card);
    border: 1.5px solid var(--bg-secondary);
}

.topbar-action-btn:hover {
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.topbar-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-orange), var(--accent-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 700;
    cursor: pointer;
    border: 2px solid var(--bg-card);
    box-shadow: var(--shadow-sm);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    padding: var(--space-lg) var(--space-xl);
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
}

/* --- Page Header --- */
.page-header {
    margin-bottom: var(--space-xl);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    margin-bottom: var(--space-xs);
}

.page-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

/* --- Grid Layouts --- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

/* Dashboard-style grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-lg);
}

/* Editor layout: main + panel */
.editor-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--space-lg);
    align-items: start;
}

/* --- Page Transition --- */
.page {
    animation: fadeInUp 0.35s ease forwards;
}

/* --- Responsive --- */
@media (max-width: 1200px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .editor-layout {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 900px) {
    .topbar {
        padding: 0 var(--space-md);
    }

    .topbar-search {
        width: 200px;
    }

    .main-content {
        padding: var(--space-md);
    }

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

@media (max-width: 640px) {
    .topbar-nav {
        display: none;
    }

    .topbar-search {
        display: none;
    }

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

    .main-content {
        padding: var(--space-sm);
    }

    /* Mobile nav toggle */
    .mobile-nav-toggle {
        display: flex;
    }
}

/* Mobile nav toggle (hidden by default) */
.mobile-nav-toggle {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}