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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.container-sm { max-width: 800px; }
.container-lg { max-width: 1400px; }
.container-fluid { max-width: 100%; }

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

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

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

/* Flexbox Utilities */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.flex-col { flex-direction: column; }
.flex-center { justify-content: center; align-items: center; }
.flex-between { justify-content: space-between; }
.flex-around { justify-content: space-around; }
.flex-start { justify-content: flex-start; }
.flex-end { justify-content: flex-end; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Navigation Layout */
.navbar {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

/* Hero Section Layout */
.hero {
    position: relative;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 8rem var(--spacing-xl);
    text-align: center;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin: 0 auto;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="1200" height="600" fill="url(%23grid)"/></svg>');
    animation: moveBackground 20s linear infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: var(--radius-full);
    filter: blur(40px);
    animation: float 6s ease-in-out infinite;
}

/* Section Layouts */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    font-size: var(--text-4xl);
    margin-bottom: var(--spacing-md);
    color: var(--secondary-color);
    font-weight: var(--font-extrabold);
    letter-spacing: -1px;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 5px;
    background: var(--gradient-accent);
    margin: var(--spacing-md) auto 0;
    border-radius: var(--radius-sm);
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: var(--text-lg);
    margin-bottom: var(--spacing-2xl);
}

/* Listings Grid */
.listings-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--white) 0%, var(--light-color) 100%);
}

.listings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
}

/* Stats Section Layout */
.stats-section {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.stats-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(245, 158, 11, 0.1);
    border-radius: var(--radius-full);
    filter: blur(40px);
    animation: float 6s ease-in-out infinite;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    text-align: center;
    position: relative;
    z-index: 1;
}

/* Features Section Layout */
.features-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--light-color) 0%, var(--white) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

/* Contact Section Layout */
.contact-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

/* Footer Layout */
.footer {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    text-align: left;
    margin-bottom: var(--spacing-xl);
}

/* Dashboard Layout */
.dashboard-container {
    display: flex;
    min-height: calc(100vh - 80px);
}

.sidebar {
    width: 280px;
    background: var(--gradient-dark);
    color: var(--white);
    padding: var(--spacing-xl) var(--spacing-lg);
    position: sticky;
    top: 80px;
    height: calc(100vh - 80px);
    overflow-y: auto;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.1);
}

.dashboard-main {
    flex: 1;
    padding: var(--spacing-xl);
    background-color: var(--light-color);
    overflow-y: auto;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

/* Quick Filters Layout */
.quick-filters {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(245, 158, 11, 0.05) 100%);
    padding: var(--spacing-2xl) 0;
    text-align: center;
    border-top: 1px solid rgba(37, 99, 235, 0.1);
    border-bottom: 1px solid rgba(37, 99, 235, 0.1);
}

.filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Modal Layout */
.modal {
    display: none;
    position: fixed;
    z-index: var(--z-modal);
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--white);
    margin: 3% auto;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

/* Responsive Layout */
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--gradient-primary);
        flex-direction: column;
        gap: 0;
        border-top: 2px solid var(--accent-color);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hero {
        padding: 4rem var(--spacing-md);
        min-height: auto;
    }
    
    .dashboard-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        position: static;
        height: auto;
    }
}