/**
 * Layout Styles
 * Container, grid, flexbox, and structural layout utilities
 */

/* Container System */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--container-padding);
}

.container-sm {
    max-width: 640px;
}

.container-md {
    max-width: 768px;
}

.container-lg {
    max-width: 1024px;
}

.container-xl {
    max-width: var(--container-max-width);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

.grid-cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-cols-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-cols-6 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.grid-cols-12 {
    grid-template-columns: repeat(12, minmax(0, 1fr));
}

/* Grid column spans */
.col-span-1 {
    grid-column: span 1 / span 1;
}

.col-span-2 {
    grid-column: span 2 / span 2;
}

.col-span-3 {
    grid-column: span 3 / span 3;
}

.col-span-4 {
    grid-column: span 4 / span 4;
}

.col-span-6 {
    grid-column: span 6 / span 6;
}

.col-span-full {
    grid-column: 1 / -1;
}

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

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

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

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

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

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

/* Flex alignment */
.justify-start {
    justify-content: flex-start;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.content-around {
    align-content: space-around;
}

.content-evenly {
    align-content: space-evenly;
}

/* Flex grow/shrink */
.flex-1 {
    flex: 1 1 0%;
}

.flex-auto {
    flex: 1 1 auto;
}

.flex-initial {
    flex: 0 1 auto;
}

.flex-none {
    flex: none;
}

.grow {
    flex-grow: 1;
}

.grow-0 {
    flex-grow: 0;
}

.shrink {
    flex-shrink: 1;
}

.shrink-0 {
    flex-shrink: 0;
}

/* Gap utilities */
.gap-0 {
    gap: 0;
}

.gap-1 {
    gap: var(--space-1);
}

.gap-2 {
    gap: var(--space-2);
}

.gap-3 {
    gap: var(--space-3);
}

.gap-4 {
    gap: var(--space-4);
}

.gap-5 {
    gap: var(--space-5);
}

.gap-6 {
    gap: var(--space-6);
}

.gap-8 {
    gap: var(--space-8);
}

.gap-10 {
    gap: var(--space-10);
}

.gap-12 {
    gap: var(--space-12);
}

/* Section layouts */
.section {
    padding: var(--section-padding) 0;
}

.section-sm {
    padding: var(--space-12) 0;
}

.section-lg {
    padding: var(--space-32) 0;
}

/* Header layout */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: var(--z-fixed);
    transition: var(--transition-all);
}

.header.scrolled {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-backdrop);
    border-bottom: var(--border-width) solid var(--glass-border);
}

/* Main content offset */
.main-content {
    margin-top: var(--header-height);
}

/* Hero section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    z-index: 2;
    position: relative;
}

/* Two-column layout */
.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

/* Three-column layout */
.three-column {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

/* Card grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

/* Feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
}

/* Responsive breakpoints */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 var(--space-6);
    }
}

@media (max-width: 1024px) {
    .grid-cols-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    
    .three-column {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .two-column {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .section {
        padding: var(--space-16) 0;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .grid-cols-3,
    .grid-cols-2 {
        grid-template-columns: 1fr;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
    
    .section {
        padding: var(--space-12) 0;
    }
    
    .hero {
        min-height: 80vh;
        padding: var(--space-8) 0;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-3);
    }
    
    .section-sm {
        padding: var(--space-8) 0;
    }
    
    .section {
        padding: var(--space-10) 0;
    }
    
    .hero {
        min-height: 70vh;
    }
}

/* Utility classes for positioning */
.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.fixed {
    position: fixed;
}

.sticky {
    position: sticky;
}

.static {
    position: static;
}

/* Positioning utilities */
.top-0 {
    top: 0;
}

.right-0 {
    right: 0;
}

.bottom-0 {
    bottom: 0;
}

.left-0 {
    left: 0;
}

.inset-0 {
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

/* Z-index utilities */
.z-auto {
    z-index: auto;
}

.z-0 {
    z-index: 0;
}

.z-10 {
    z-index: 10;
}

.z-20 {
    z-index: 20;
}

.z-30 {
    z-index: 30;
}

.z-40 {
    z-index: 40;
}

.z-50 {
    z-index: 50;
}

/* Overflow utilities */
.overflow-auto {
    overflow: auto;
}

.overflow-hidden {
    overflow: hidden;
}

.overflow-visible {
    overflow: visible;
}

.overflow-scroll {
    overflow: scroll;
}

.overflow-x-auto {
    overflow-x: auto;
}

.overflow-y-auto {
    overflow-y: auto;
}

.overflow-x-hidden {
    overflow-x: hidden;
}

.overflow-y-hidden {
    overflow-y: hidden;
}

/* Display utilities */
.block {
    display: block;
}

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

.inline {
    display: inline;
}

.hidden {
    display: none;
}

/* Visibility utilities */
.visible {
    visibility: visible;
}

.invisible {
    visibility: hidden;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.not-sr-only {
    position: static;
    width: auto;
    height: auto;
    padding: 0;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
}