/* ==============================================
   LAYOUT CSS - Container, Grid, Sections
   ============================================== */

/* Container System */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 max(1rem, env(safe-area-inset-left, 1rem));
}

.container-sm { max-width: 720px; }
.container-md { max-width: 960px; }
.container-lg { max-width: 1200px; }
.container-xl { max-width: 1400px; }
.container-full { max-width: 100%; }

/* Section Layouts */
section {
    padding: var(--space-4xl) 0;
    position: relative;
}

section:nth-child(even) {
    background: var(--section-bg);
}

.section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-3xl);
}

.section-label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 150, 57, 0.1);
    border-radius: var(--radius-full);
}

body.dark-mode .section-label {
    background: rgba(0, 179, 71, 0.15);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-top: var(--space-md);
}

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

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

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

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

/* Flex Layouts */
.flex {
    display: flex;
}

.flex-col { flex-direction: column; }
.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-around { justify-content: space-around; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Header Layout */
header {
    background: var(--header-bg);
    color: #ffffff;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

/* Footer Layout */
footer {
    background: var(--footer-bg);
    color: #ffffff;
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
    display: grid;
    gap: var(--space-2xl);
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-3xl);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.footer-column h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: #ffffff;
}

.footer-column ul {
    list-style: none;
    padding: 0;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-speed);
}

.footer-column a:hover {
    color: #ffffff;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    transition: all var(--transition-speed);
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .footer-main {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

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

/* Two Column Layout */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.two-col-reverse {
    direction: rtl;
}

.two-col-reverse > * {
    direction: ltr;
}

@media (max-width: 768px) {
    .two-col,
    .two-col-reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }
}

/* Page Header Layout */
.page-header {
    background: var(--header-bg);
    padding: var(--space-4xl) 0;
    text-align: center;
    color: #ffffff;
}

.page-header h1 {
    color: #ffffff;
    margin-bottom: var(--space-md);
}

.page-header p {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-lg);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a:hover {
    color: #ffffff;
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.6);
}

/* Sidebar Layout */
.with-sidebar {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-3xl);
}

.sidebar {
    position: sticky;
    top: 100px;
    align-self: start;
}

@media (max-width: 1024px) {
    .with-sidebar {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }
}