/* ========================================
   🏗️ MAIN LAYOUT
   ======================================== */

/* 🔥 Main Container */
.main-container {
    display: flex;
    flex-direction: column;
    padding-top: 60px; /* Header height */
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    width: 100%;
}

/* 🔥 Page Header */
.page-header {
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: var(--font-size-md);
    color: var(--text-color-secondary);
    margin-bottom: var(--spacing-lg);
}

.page-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 🔥 Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-color-secondary);
    margin-bottom: var(--spacing-md);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    color: var(--text-color-tertiary);
}

.breadcrumb-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-link:hover {
    color: var(--primary-hover);
}

/* 🔥 Section */
.section {
    margin-bottom: var(--spacing-2xl);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-color);
}

.section-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.section-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: 0 1px 3px var(--shadow-color);
}

/* 🔥 Grid Layout */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-5 { grid-template-columns: repeat(5, 1fr); }
.grid-cols-6 { grid-template-columns: repeat(6, 1fr); }

/* 🔥 Flex Layout */
.flex-layout {
    display: flex;
    gap: var(--spacing-lg);
}

.flex-layout-vertical {
    flex-direction: column;
}

.flex-item {
    flex: 1;
}

.flex-item-fixed {
    flex: 0 0 auto;
}

/* 🔥 Sidebar Layout */
.sidebar-layout {
    display: flex;
    gap: var(--spacing-xl);
}

.sidebar-layout .sidebar {
    flex: 0 0 280px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    height: fit-content;
}

.sidebar-content {
    flex: 1;
    min-width: 0;
}

/* 🔥 Footer */
.footer {
    margin-top: auto;
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary-color);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-link {
    color: var(--text-color-secondary);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-color);
}

.footer-copyright {
    color: var(--text-color-tertiary);
    font-size: var(--font-size-xs);
}

/* 🔥 Mobile Layout */
@media (max-width: 768px) {
    .main-container {
        padding-top: 56px; /* Mobile header height */
    }

    .main-content {
        padding: 0 var(--spacing-md);
    }
    
    .page-header {
        padding: var(--spacing-lg) 0;
    }

    .page-title {
        font-size: var(--font-size-xl);
    }
    
    .page-actions {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }

    .section-content {
        padding: var(--spacing-lg);
    }

    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4,
    .grid-cols-5,
    .grid-cols-6 {
        grid-template-columns: 1fr;
    }

    .flex-layout {
        flex-direction: column;
    }
    
    .sidebar-layout {
        flex-direction: column;
    }

    .sidebar-layout .sidebar {
        flex: none;
        order: 2;
    }
    
    .sidebar-content {
        order: 1;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* 🔥 Tablet Layout */
@media (max-width: 1024px) {
    .main-content {
        padding: 0 var(--spacing-lg);
    }

    .grid-cols-3,
    .grid-cols-4,
    .grid-cols-5,
    .grid-cols-6 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sidebar-layout .sidebar {
        flex: 0 0 240px;
    }
}