/* ==========================================================================
   Swap and Top Design System & Stylesheet (Premium Light Theme)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-dark: #f8fafc; /* Slate 50 */
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9; /* Slate 100 */
    --primary: #4f46e5; /* Indigo 600 */
    --primary-hover: #3730a3; /* Indigo 800 */
    --accent-emerald: #047857; /* Emerald 700 */
    --accent-rose: #be123c; /* Rose 700 */
    --accent-amber: #b45309; /* Amber 700 */
    --text-primary: #0f172a; /* Slate 900 */
    --text-secondary: #475569; /* Slate 600 */
    --border-color: #e2e8f0; /* Slate 200 */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(0, 0, 0, 0.08);
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header & Navigation */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary), #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    list-style: none;
}

.nav-profile {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    max-width: 180px;
    text-align: right;
    line-height: 1.2;
}

.nav-profile-name {
    color: var(--text-primary);
    font-size: 0.9rem;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-profile-email {
    color: var(--text-secondary);
    font-size: 0.75rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
}

.nav-logout-form {
    margin: 0;
}

.nav-logout-button {
    background: none;
    border: 0;
    color: var(--text-secondary);
    cursor: pointer;
    font: inherit;
    font-weight: 500;
    padding: 0;
    transition: var(--transition-smooth);
}

.nav-logout-button:hover {
    color: var(--primary);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
    background: linear-gradient(135deg, #4f46e5, var(--primary));
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

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

/* Main Container */
main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2.5rem 2rem;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 4rem;
    background: radial-gradient(circle at center, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
    padding: 4rem 2rem;
    border-radius: 24px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
    color: var(--text-primary);
}

.hero h1 span {
    background: linear-gradient(135deg, var(--accent-emerald), var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    color: var(--text-secondary);
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Search Filters Card */
.filter-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2rem;
    margin-bottom: 3rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    outline: none;
    width: 100%;
}

.form-control:focus {
    background-color: var(--bg-surface);
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

.form-control.has-error,
.photo-upload-zone.has-error {
    border-color: var(--accent-rose);
}

.field-error {
    color: var(--accent-rose);
    font-size: 0.85rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    height: 100%;
    padding-top: 1.8rem;
}

.checkbox-group input {
    width: 1.2rem;
    height: 1.2rem;
    accent-color: var(--primary);
}

/* Grid of Listing Items */
.items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

/* Item Card Design */
.item-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
}

.item-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    border-color: rgba(79, 70, 229, 0.15);
}

.card-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 60%; /* 5:3 Aspect Ratio */
    background-color: #f1f5f9;
    overflow: hidden;
}

.card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

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

.card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.4rem 0.8rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    z-index: 5;
}

.badge-upgrade {
    background-color: rgba(4, 120, 87, 0.1);
    color: var(--accent-emerald);
    border: 1px solid rgba(4, 120, 87, 0.2);
}

.badge-downgrade {
    background-color: rgba(190, 18, 60, 0.1);
    color: var(--accent-rose);
    border: 1px solid rgba(190, 18, 60, 0.2);
}

.badge-even_swap {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary);
    border: 1px solid rgba(79, 70, 229, 0.2);
}

.card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-category {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.swap-indicator {
    background-color: var(--bg-dark);
    padding: 0.75rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    border-left: 3px solid var(--primary);
}

.swap-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 600;
}

.swap-target {
    font-weight: 700;
    color: var(--text-primary);
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.card-fee {
    font-weight: 700;
    font-size: 1.1rem;
}

.card-fee.negotiable {
    color: var(--accent-amber);
}

.card-fee.fixed {
    color: var(--text-primary);
}

/* Detail Page Layout */
.detail-layout {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 900px) {
    .detail-layout {
        grid-template-columns: 1fr;
    }
}

/* Gallery Slider */
.gallery-container {
    width: 100%;
    margin-bottom: 2rem;
}

.gallery-main {
    position: relative;
    border-radius: 18px;
    overflow: hidden;
    background-color: #f1f5f9;
    padding-top: 60%;
    border: 1px solid var(--border-color);
}

.gallery-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.gallery-slide.active {
    opacity: 1;
}

.gallery-thumbnails {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    overflow-x: auto;
}

.gallery-thumb {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition-smooth);
}

.gallery-thumb.active, .gallery-thumb:hover {
    border-color: var(--primary);
    transform: scale(1.05);
}

/* Detail Info Box */
.detail-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.detail-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.detail-header h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.detail-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.meta-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.detail-description {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.detail-description h3 {
    margin-bottom: 0.75rem;
    color: var(--primary);
}

/* Sticky Sidebar (Contact Card) */
.sidebar-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2rem;
    position: sticky;
    top: 6rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.sidebar-card h2 {
    color: var(--text-primary);
}

.swap-specs {
    margin-bottom: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    padding-bottom: 0.75rem;
    border-bottom: 1px dashed var(--border-color);
}

.spec-label {
    color: var(--text-secondary);
    font-weight: 500;
}

.spec-value {
    font-weight: 700;
    color: var(--text-primary);
}

.contact-section {
    text-align: center;
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

/* Reveal Contact State classes */
.contact-details-box {
    display: none;
    background-color: rgba(79, 70, 229, 0.05);
    border: 1px solid rgba(79, 70, 229, 0.15);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    text-align: left;
    animation: fadeIn 0.4s ease-out;
}

.contact-details-box.show {
    display: block;
}

.contact-item {
    margin-bottom: 0.75rem;
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item label {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--text-secondary);
    display: block;
}

.contact-item span {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Form Layout styles */
.form-layout {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2.5rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.form-layout h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    color: var(--text-primary);
}

.form-layout form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 600px) {
    .form-row-2 {
        grid-template-columns: 1fr;
    }
}

.photo-upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    background-color: var(--bg-dark);
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
}

.photo-upload-zone:hover {
    border-color: var(--primary);
    background-color: var(--bg-surface-hover);
}

.photo-upload-zone input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    font-size: 2.5rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.upload-preview-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    margin-top: 1rem;
}

.upload-preview-item {
    position: relative;
    padding-top: 100%;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.upload-preview-item img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Analytics Stats Dashboard */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.stat-val {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-lbl {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
}

.dashboard-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

@media (max-width: 800px) {
    .dashboard-row {
        grid-template-columns: 1fr;
    }
}

.dashboard-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
}

.dashboard-panel h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.75rem;
    color: var(--text-primary);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th, .data-table td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
}

.data-table td a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

.data-table td a:hover {
    color: var(--primary);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Footer styling */
footer {
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    margin-top: auto;
    font-size: 0.9rem;
}