/* Layout Styles - Grid System, Responsive Breakpoints */

/* Container and Grid System */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-lg);
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 var(--space-xl);
    }
}

/* Responsive Breakpoints */
/* Mobile First Approach */
/* xs: 0px and up (default) */
/* sm: 640px and up */
/* md: 768px and up */
/* lg: 1024px and up */
/* xl: 1280px and up */

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

.grid-cols-1 {
    grid-template-columns: 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);
}

/* Responsive Grid Classes */
@media (min-width: 640px) {
    .sm\:grid-cols-1 {
        grid-template-columns: 1fr;
    }
    
    .sm\:grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sm\:grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) {
    .md\:grid-cols-1 {
        grid-template-columns: 1fr;
    }
    
    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .md\:grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .md\:grid-cols-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1024px) {
    .lg\:grid-cols-1 {
        grid-template-columns: 1fr;
    }
    
    .lg\:grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .lg\:grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .lg\:grid-cols-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-row {
    flex-direction: row;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-start {
    justify-content: flex-start;
}

.justify-end {
    justify-content: flex-end;
}

/* Main Layout Structure */
.site-header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.main-content {
    flex: 1;
    min-height: calc(100vh - 200px); /* Approximate header + footer height */
}

.site-footer {
    background-color: var(--gray-800);
    color: var(--gray-300);
    margin-top: auto;
}

/* Content Sections */
.section {
    padding: var(--space-2xl) 0;
}

.section-sm {
    padding: var(--space-xl) 0;
}

.section-lg {
    padding: var(--space-3xl) 0;
}

/* Hero Section Layout */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    color: var(--white);
    text-align: center;
    padding: var(--space-3xl) 0;
}

.hero h1 {
    color: var(--white);
    margin-bottom: var(--space-lg);
}

.hero p {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--text-lg);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

/* Content Layout Patterns */
.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.two-column {
    display: grid;
    gap: var(--space-2xl);
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .two-column {
        grid-template-columns: 1fr 1fr;
    }
}

.three-column {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .three-column {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .three-column {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Card Layout */
.card-grid {
    display: grid;
    gap: var(--space-lg);
    grid-template-columns: 1fr;
}

@media (min-width: 640px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Responsive Text Alignment */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

@media (min-width: 768px) {
    .md\:text-left {
        text-align: left;
    }
    
    .md\:text-center {
        text-align: center;
    }
    
    .md\:text-right {
        text-align: right;
    }
}

/* Responsive Display */
.hidden {
    display: none;
}

.block {
    display: block;
}

.inline-block {
    display: inline-block;
}

@media (min-width: 640px) {
    .sm\:block {
        display: block;
    }
    
    .sm\:hidden {
        display: none;
    }
}

@media (min-width: 768px) {
    .md\:block {
        display: block;
    }
    
    .md\:hidden {
        display: none;
    }
    
    .md\:flex {
        display: flex;
    }
}

@media (min-width: 1024px) {
    .lg\:block {
        display: block;
    }
    
    .lg\:hidden {
        display: none;
    }
}

/* Loading States */
.loading-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl);
    min-height: 200px;
}

.loading-indicator[aria-hidden="true"] {
    display: none;
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .nav-toggle {
        display: none;
    }
    
    .main-content {
        margin: 0;
        padding: 0;
    }
    
    .section {
        padding: var(--space-md) 0;
    }
    
    a {
        text-decoration: underline;
    }
    
    a[href^="http"]:after {
        content: " (" attr(href) ")";
        font-size: var(--text-sm);
        color: var(--text-muted);
    }
}