/**
 * Layout Utilities
 *
 * Fluid container, responsive grids, and section layouts
 * Uses CSS Grid and Flexbox for modern responsive design
 *
 * @package MattressProtectorReviews
 * @version 2.0.0 - Design System Transformation
 */

/* ============================================
   CONTAINER SYSTEM
   ============================================ */
.container,
.mpr-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    width: 100%;
}

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

.container-narrow {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.container-wide {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ============================================
   SECTION LAYOUTS
   ============================================ */
.section,
.mpr-section {
    padding: var(--space-2xl) 0;
    position: relative;
}

.section:not(:last-child) {
    border-bottom: 2px solid var(--layer-3);
}

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

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

/* Section with background */
.section-bg {
    background: var(--layer-3);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-xl);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    padding: var(--space-2xl) 0;
    background: var(--gradient-subtle);
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-2xl);
    align-items: start;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-heading);
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--text-body);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* ============================================
   FINAL CTA SECTION
   ============================================ */
.final-cta {
    text-align: center;
    padding: var(--space-3xl) 0;
    background: var(--gradient-subtle);
    border-radius: var(--radius-2xl);
    margin: var(--space-xl) 0;
}

.final-cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.final-cta-title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-md);
}

.final-cta-description {
    font-size: var(--text-lg);
    color: var(--text-body);
    margin-bottom: var(--space-lg);
}

/* ============================================
   GRID SYSTEM
   ============================================ */
.mpr-grid {
    display: grid;
    gap: var(--space-md);
}

/* Auto-fit grid - responsive columns */
.grid-auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-auto-fill {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* Fixed column grids */
.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); }

/* Gap utilities */
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* ============================================
   FLEX UTILITIES
   ============================================ */
.mpr-flex,
.flex {
    display: flex;
}

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

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

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

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

/* Justify */
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

/* Align */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

/* ============================================
   SPACING UTILITIES
   ============================================ */
/* Margin */
.m-auto { margin: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* Padding */
.p-xs { padding: var(--space-xs); }
.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }

.px-xs { padding-left: var(--space-xs); padding-right: var(--space-xs); }
.px-sm { padding-left: var(--space-sm); padding-right: var(--space-sm); }
.px-md { padding-left: var(--space-md); padding-right: var(--space-md); }
.px-lg { padding-left: var(--space-lg); padding-right: var(--space-lg); }

.py-xs { padding-top: var(--space-xs); padding-bottom: var(--space-xs); }
.py-sm { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-md { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-lg { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }

/* ============================================
   STACK LAYOUTS
   ============================================ */
.mpr-stack,
.stack {
    display: flex;
    flex-direction: column;
}

.stack-xs { gap: var(--space-xs); }
.stack-sm { gap: var(--space-sm); }
.stack-md { gap: var(--space-md); }
.stack-lg { gap: var(--space-lg); }
.stack-xl { gap: var(--space-xl); }

/* Horizontal stack */
.hstack {
    display: flex;
    flex-direction: row;
    gap: var(--space-sm);
}

/* ============================================
   CONTENT WRAPPER
   ============================================ */
.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.content-narrow {
    max-width: 640px;
    margin: 0 auto;
}

.content-wide {
    max-width: 960px;
    margin: 0 auto;
}

/* ============================================
   TWO-COLUMN LAYOUT
   ============================================ */
.two-column-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-2xl);
}

.main-content {
    min-width: 0; /* Prevent overflow */
}

.sidebar {
    min-width: 0; /* Prevent overflow */
}

/* Sticky sidebar */
.sidebar-sticky {
    position: sticky;
    top: var(--space-lg);
    align-self: start;
}

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

.card-grid-sm {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.card-grid-lg {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

/* ============================================
   ASPECT RATIO CONTAINERS
   ============================================ */
.aspect-square {
    aspect-ratio: 1 / 1;
}

.aspect-video {
    aspect-ratio: 16 / 9;
}

.aspect-4-3 {
    aspect-ratio: 4 / 3;
}

/* ============================================
   VISIBILITY UTILITIES
   ============================================ */
.hidden {
    display: none !important;
}

.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-width: 0;
}

/* ============================================
   RESPONSIVE LAYOUT ADJUSTMENTS
   ============================================ */
@media (max-width: 1024px) {
    .two-column-layout {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .sidebar-sticky {
        position: static;
    }

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

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

@media (max-width: 768px) {
    .hero-grid {
        display: block;
    }

    .hero-grid > * + * {
        margin-top: var(--space-lg);
    }

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

    .hero-content {
        gap: var(--space-md);
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }

    .hero-actions {
        flex-direction: column;
    }

    .final-cta {
        padding: var(--space-xl) var(--container-padding);
    }

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

    .card-grid {
        grid-template-columns: 1fr;
    }

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

    .section-lg {
        padding: var(--space-2xl) 0;
    }

    /* Mobile-specific flex */
    .flex-md-col {
        flex-direction: column;
    }

    /* Hide on mobile */
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 769px) {
    /* Hide on desktop */
    .hide-desktop {
        display: none !important;
    }

    /* Show only on mobile */
    .show-mobile {
        display: none !important;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .container,
    .mpr-container {
        max-width: 100%;
        padding: 0;
    }

    .section {
        page-break-inside: avoid;
    }

    .hero,
    .final-cta {
        background: none;
    }

    /* Hide non-essential elements */
    .hide-print {
        display: none !important;
    }
}