/* ============================================
   ASTROCLASSIFIEDS - PUBLIC SITE STYLES
   Light theme, Inter font, mobile-first
   ============================================ */

/* Google Font Import handled in HTML head */

:root {
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Colors */
    --color-primary: #1e40af;
    --color-primary-dark: #1e3a8a;
    --color-primary-light: #3b82f6;
    --color-secondary: #0f766e;
    --color-accent: #f59e0b;

    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-surface: #ffffff;

    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;

    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    --color-success: #22c55e;
    --color-danger: #ef4444;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

/* Base */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    margin: 0;
    padding: 0;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-top: 0;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-top: 0;
    margin-bottom: var(--space-md);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ============================================
   HEADER & NAVIGATION
   ============================================ */

.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1030;
    box-shadow: var(--shadow-sm);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    min-height: 64px;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text);
    text-decoration: none;
}

.brand:hover {
    text-decoration: none;
    color: var(--color-text);
}

.brand i {
    color: var(--color-accent);
    font-size: 1.5rem;
}

/* Search bar */
.header-search {
    flex: 1;
    max-width: 400px;
    margin: 0 var(--space-lg);
    position: relative;
}

.header-search input {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    padding-left: 2.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    background: var(--color-bg-alt);
    font-family: var(--font-main);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.header-search input:focus {
    outline: none;
    border-color: var(--color-primary-light);
    background: var(--color-surface);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.header-search i {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
}

/* Nav links */
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-bg-alt);
    text-decoration: none;
}

.nav-link.active {
    color: var(--color-primary);
    background: rgba(30, 64, 175, 0.08);
}

/* Post Ad button */
.btn-post-ad {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-primary);
    color: #fff !important;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

.btn-post-ad:hover {
    background: var(--color-primary-dark);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* User menu */
.user-menu {
    position: relative;
}

.user-menu-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-lg);
    border: none;
    background: none;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-menu-toggle:hover {
    background: var(--color-bg-alt);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + var(--space-xs));
    right: 0;
    min-width: 220px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-sm);
    display: none;
    z-index: 1050;
}

.user-menu-dropdown.show {
    display: block;
}

.user-menu-dropdown a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.9375rem;
}

.user-menu-dropdown a:hover {
    background: var(--color-bg-alt);
    text-decoration: none;
}

.user-menu-dropdown .dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-sm) 0;
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--space-sm);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1e3a5f 100%);
    color: #fff;
    padding: var(--space-2xl) var(--space-md);
    text-align: center;
}

.hero h1 {
    color: #fff;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--space-md);
}

.hero p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-hero {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.btn-hero-primary {
    background: var(--color-accent);
    color: var(--color-bg-dark) !important;
}

.btn-hero-primary:hover {
    background: #fbbf24;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(245, 158, 11, 0.3);
}

.btn-hero-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #fff !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-hero-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    text-decoration: none;
}

/* ============================================
   LISTING CARDS
   ============================================ */

.listing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.listing-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.listing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.listing-card-image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-bg-alt);
}

.listing-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.listing-card:hover .listing-card-image img {
    transform: scale(1.05);
}

.listing-card-badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-new { background: var(--color-success); color: #fff; }
.badge-like-new { background: #10b981; color: #fff; }
.badge-good { background: #3b82f6; color: #fff; }
.badge-fair { background: var(--color-warning); color: #fff; }
.badge-project { background: var(--color-danger); color: #fff; }
.badge-wanted { background: #8b5cf6; color: #fff; }

.listing-card-body {
    padding: var(--space-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.listing-card-title {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--color-text);
}

.listing-card-price {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.listing-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: auto;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--color-border-light);
}

.listing-card-meta i {
    font-size: 0.75rem;
}

/* ============================================
   FORMS
   ============================================ */

.form-label {
    display: block;
    font-weight: 500;
    font-size: 0.9375rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.form-label .required {
    color: var(--color-danger);
}

.form-control, .form-select {
    display: block;
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-main);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus, .form-select:focus {
    outline: none;
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control::placeholder {
    color: var(--color-text-light);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.form-text {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.form-check-input {
    margin-top: 0.25rem;
    width: 1.125rem;
    height: 1.125rem;
    accent-color: var(--color-primary);
}

.form-check-label {
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* Character counter */
.char-counter {
    text-align: right;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.char-counter.warning {
    color: var(--color-warning);
}

.char-counter.danger {
    color: var(--color-danger);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-main);
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.btn-secondary {
    background: var(--color-bg-alt);
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border-light);
}

.btn-success {
    background: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
    border-color: var(--color-danger);
}

.btn-warning {
    background: var(--color-warning);
    color: #fff;
    border-color: var(--color-warning);
}

.btn-outline-primary {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline-primary:hover {
    background: var(--color-primary);
    color: #fff;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.alert-success {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.alert-danger {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.alert-warning {
    background: #fffbeb;
    border: 1px solid #fde68a;
    color: #92400e;
}

.alert-info {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
}

/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    line-height: 1;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   SECTIONS
   ============================================ */

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

.section-title {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-title h2 {
    margin-bottom: var(--space-sm);
}

.section-title p {
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.section-alt {
    background: var(--color-bg-alt);
}

/* ============================================
   CATEGORY GRID
   ============================================ */

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-md);
}

.category-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) var(--space-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    text-decoration: none;
    color: var(--color-text);
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
    text-decoration: none;
    color: var(--color-primary);
}

.category-card i {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.category-card span {
    font-weight: 500;
    font-size: 0.9375rem;
}

/* ============================================
   STATS BAR
   ============================================ */

.stats-bar {
    background: var(--color-bg-dark);
    color: #fff;
    padding: var(--space-lg) var(--space-md);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-lg);
    text-align: center;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
    background: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-2xl) var(--space-md) var(--space-lg);
}

.site-footer a {
    color: rgba(255, 255, 255, 0.8);
}

.site-footer a:hover {
    color: #fff;
}

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

.footer-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: var(--space-sm);
}

.footer-links h4 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

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

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-lg);
    text-align: center;
    font-size: 0.875rem;
}

/* ============================================
   DISCLAIMER
   ============================================ */

.disclaimer-box {
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    font-size: 0.8125rem;
    color: #92400e;
    margin-bottom: var(--space-lg);
}

.disclaimer-box i {
    margin-right: var(--space-xs);
}

/* ============================================
   AUTH PAGES
   ============================================ */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, #e2e8f0 100%);
    padding: var(--space-md);
}

.auth-card {
    width: 100%;
    max-width: 480px;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.auth-header {
    background: var(--color-bg-dark);
    color: #fff;
    padding: var(--space-xl);
    text-align: center;
}

.auth-header h1 {
    color: #fff;
    margin-bottom: var(--space-xs);
}

.auth-header p {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

.auth-body {
    padding: var(--space-xl);
}

.auth-footer {
    text-align: center;
    padding: var(--space-md) var(--space-xl);
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   IMAGE UPLOAD (with progress bar)
   ============================================ */

.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    background: var(--color-bg-alt);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--color-primary-light);
    background: rgba(59, 130, 246, 0.05);
}

.upload-zone i {
    font-size: 2.5rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
}

.upload-zone-text {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.upload-zone-text strong {
    color: var(--color-primary);
}

.upload-preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.upload-preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--color-border);
}

.upload-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-preview-item .remove-btn {
    position: absolute;
    top: var(--space-xs);
    right: var(--space-xs);
    width: 24px;
    height: 24px;
    background: var(--color-danger);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
}

.upload-preview-item .primary-badge {
    position: absolute;
    bottom: var(--space-xs);
    left: var(--space-xs);
    background: var(--color-primary);
    color: #fff;
    font-size: 0.625rem;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* Progress bar */
.upload-progress {
    width: 100%;
    height: 6px;
    background: var(--color-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-top: var(--space-sm);
}

.upload-progress-bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    transition: width 0.3s ease;
    width: 0%;
}

.upload-progress-bar.success {
    background: var(--color-success);
}

.upload-progress-bar.error {
    background: var(--color-danger);
}

.upload-status {
    font-size: 0.8125rem;
    margin-top: var(--space-xs);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.upload-status.success { color: var(--color-success); }
.upload-status.error { color: var(--color-danger); }
.upload-status.uploading { color: var(--color-info); }

/* ============================================
   PAGINATION
   ============================================ */

.pagination {
    display: flex;
    list-style: none;
    padding: 0;
    margin: var(--space-xl) 0;
    gap: var(--space-xs);
    justify-content: center;
}

.page-item .page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

.page-item .page-link:hover {
    background: var(--color-bg-alt);
    text-decoration: none;
}

.page-item.active .page-link {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.page-item.disabled .page-link {
    color: var(--color-text-light);
    cursor: not-allowed;
    background: var(--color-bg-alt);
}

/* ============================================
   UTILITIES
   ============================================ */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-primary { color: var(--color-primary); }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.gap-1 { gap: var(--space-sm); }
.gap-2 { gap: var(--space-md); }
.gap-3 { gap: var(--space-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }

.ms-auto { margin-left: auto; }
.me-auto { margin-right: auto; }

.w-100 { width: 100%; }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .site-header .container {
        flex-wrap: wrap;
    }

    .header-search {
        order: 3;
        flex-basis: 100%;
        margin: var(--space-sm) 0 0 0;
        max-width: none;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: var(--space-md);
        flex-direction: column;
        gap: var(--space-xs);
        box-shadow: var(--shadow-lg);
    }

    .nav-links.show {
        display: flex;
    }

    .nav-link {
        width: 100%;
        justify-content: flex-start;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: 1.75rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .listing-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-md);
    }

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

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

    .auth-card {
        margin: var(--space-md);
    }
}

@media (max-width: 480px) {
    .listing-grid {
        grid-template-columns: 1fr;
    }

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

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

    .btn-hero {
        width: 100%;
        justify-content: center;
    }
}