/* 
 * layout.css
 * Estructura principal y layout para Bhava Nirodha Nilaya
 * Header, main, footer y contenedores principales
 */

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

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

/* ===== HEADER ===== */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: var(--spacing-md) 0;
    border-bottom: 3px solid var(--accent-color);
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: var(--z-header);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-family-headings);
}

.logo:hover {
    color: var(--accent-color);
    text-decoration: none;
    transform: translateY(-2px);
    transition: all var(--transition-normal);
}

/* ===== MAIN CONTENT ===== */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

/* ===== INTRODUCCIÓN ===== */
.intro {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
    padding: var(--spacing-xxl) var(--spacing-xl);
    background: var(--light-bg);
    border-radius: var(--border-radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.intro h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    font-weight: bold;
}

.intro .subtitle {
    color: var(--secondary-color);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
    font-style: italic;
    font-weight: 600;
}

.intro p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== FOOTER ===== */
.footer {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-md) 0;
    margin-top: var(--spacing-xxl) * 1.5;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.footer-section p {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    display: block;
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-normal);
    padding: var(--spacing-xs) 0;
}

.footer-section a:hover {
    color: var(--accent-color);
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--accent-color);
    margin-top: var(--spacing-xl);
}

.footer-bottom p {
    margin: 0;
    font-size: 0.95rem;
    opacity: 0.9;
}

/* ===== GRIDS ESPECIALIZADOS ===== */
.content-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.content-grid.two-columns {
    grid-template-columns: 1fr 1fr;
}

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

.content-grid.auto-fit {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

/* ===== ESPACIADO DE SECCIONES ===== */
.section {
    margin-bottom: var(--spacing-xxl);
    padding: var(--spacing-xl) 0;
}

.section:last-child {
    margin-bottom: 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.section-header h2 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.section-header p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-color);
}

/* ===== SIDEBAR Y LAYOUT COMPLEMENTARIO ===== */
.sidebar {
    background: var(--light-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.sidebar h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.main-with-sidebar {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
    align-items: start;
}

.content-area {
    min-width: 0; /* Previene overflow en grid */
}

/* ===== HERO SECTIONS ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: var(--spacing-xxl) * 2 0;
    text-align: center;
    margin-bottom: var(--spacing-xxl);
}

.hero h1 {
    color: var(--white);
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.hero p {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    opacity: 0.95;
}

.hero .btn {
    margin: var(--spacing-sm);
}

/* ===== BREADCRUMBS ===== */
.breadcrumbs {
    background: var(--light-bg);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.breadcrumbs ol {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.breadcrumbs li {
    margin: 0;
}

.breadcrumbs li:not(:last-child)::after {
    content: ' / ';
    margin-left: var(--spacing-sm);
    color: var(--text-color);
    opacity: 0.6;
}

.breadcrumbs a {
    color: var(--secondary-color);
    text-decoration: none;
}

.breadcrumbs a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* ===== LAYOUT UTILITIES ===== */
.flex {
    display: flex;
}

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

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

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

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

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

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

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

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

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

/* ===== CONTENIDO CENTRADO ===== */
.centered-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.wide-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== ESPACIADO VERTICAL ===== */
.space-y-sm > * + * { margin-top: var(--spacing-sm); }
.space-y-md > * + * { margin-top: var(--spacing-md); }
.space-y-lg > * + * { margin-top: var(--spacing-lg); }
.space-y-xl > * + * { margin-top: var(--spacing-xl); }

/* ===== DIVISORES ===== */
.divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-xl) 0;
    border: none;
}

.divider-thick {
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: var(--spacing-xl) 0;
    border-radius: var(--border-radius-sm);
}

/* ===== STICKY ELEMENTS ===== */
.sticky-top {
    position: sticky;
    top: var(--spacing-md);
    z-index: 50;
}

.sticky-nav {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

/* ===== OVERFLOW Y SCROLL ===== */
.overflow-hidden {
    overflow: hidden;
}

.overflow-scroll {
    overflow: auto;
}

.scroll-smooth {
    scroll-behavior: smooth;
}

/* ===== VISIBILITY ===== */
.visible {
    visibility: visible;
    opacity: 1;
}

.invisible {
    visibility: hidden;
    opacity: 0;
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== BACKGROUND PATTERNS ===== */
.bg-pattern {
    background-image: 
        radial-gradient(circle at 20px 20px, var(--accent-color) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.05;
}

.bg-gradient {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.bg-light {
    background: var(--light-bg);
}

/* ===== ASPECT RATIOS ===== */
.aspect-ratio {
    position: relative;
    width: 100%;
}

.aspect-ratio::before {
    content: '';
    display: block;
    padding-top: var(--aspect-ratio, 56.25%); /* 16:9 by default */
}

.aspect-ratio > * {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.aspect-16-9 {
    --aspect-ratio: 56.25%;
}

.aspect-4-3 {
    --aspect-ratio: 75%;
}

.aspect-square {
    --aspect-ratio: 100%;
}