/* Color Variables - White with Subtle Red Theme */
:root {
    --primary-red: #E31E24;
    --primary-red-light: #FF3B41;
    --primary-red-dark: #C41E3A;
    --secondary-red: #FFE5E5;
    --accent-red: #FF6B6B;
    
    --white: #FFFFFF;
    --white-soft: #FEFEFE;
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #E8E8E8;
    --gray-300: #D1D1D1;
    --gray-400: #9E9E9E;
    --gray-500: #6B6B6B;
    --gray-600: #424242;
    --gray-700: #2E2E2E;
    --gray-800: #1A1A1A;
    --gray-900: #121212;
    
    --success: #28A745;
    --warning: #FFC107;
    --danger: #DC3545;
    --info: #17A2B8;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    
    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--white);
    color: var(--gray-800);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--white);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-spinner p {
    color: var(--gray-600);
    font-weight: 500;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Top Navigation */
.top-nav {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-left .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-red);
}

.nav-left .logo i {
    font-size: 1.8rem;
}

.nav-center {
    flex: 1;
    max-width: 600px;
    margin: 0 40px;
}

.search-bar {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    padding: 0 15px;
    transition: var(--transition);
}

.search-bar:focus-within {
    border-color: var(--primary-red);
    box-shadow: 0 0 0 3px rgba(227, 30, 36, 0.1);
}

.search-icon {
    color: var(--gray-400);
    margin-right: 10px;
}

#search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 12px 0;
    font-size: 1rem;
    outline: none;
    color: var(--gray-800);
}

#search-input::placeholder {
    color: var(--gray-400);
}

.search-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 8px 15px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--primary-red-dark);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.language-selector select {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: 8px 12px;
    font-size: 0.9rem;
    cursor: pointer;
}

.nav-btn {
    position: relative;
    background: none;
    border: none;
    padding: 10px;
    border-radius: var(--border-radius);
    cursor: pointer;
    color: var(--gray-600);
    transition: var(--transition);
}

.nav-btn:hover {
    background: var(--gray-100);
    color: var(--primary-red);
}

.notification-badge, .message-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    background: var(--primary-red);
    color: var(--white);
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.user-menu {
    position: relative;
}

.user-avatar {
    background: var(--gray-100);
    border: none;
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.user-avatar:hover {
    background: var(--secondary-red);
    color: var(--primary-red);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
}

.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    cursor: pointer;
    color: var(--gray-700);
    transition: var(--transition);
}

.dropdown-item:hover {
    background: var(--secondary-red);
    color: var(--primary-red);
}

/* Main Content */
.main-content {
    flex: 1;
    padding-top: 0;
    padding-bottom: 80px; /* Space for bottom nav */
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Screens */
.screen {
    display: none;
    min-height: calc(100vh - 150px);
}

.screen.active {
    display: block;
}

/* Welcome Section */
.welcome-section {
    background: linear-gradient(135deg, var(--white) 0%, var(--secondary-red) 100%);
    padding: 60px 0;
    text-align: center;
}

.welcome-content {
    max-width: 600px;
    margin: 0 auto;
}

.welcome-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 20px;
}

.welcome-message {
    font-size: 1.2rem;
    color: var(--gray-600);
    margin-bottom: 30px;
}

.post-ad-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.post-ad-btn:hover {
    background: var(--primary-red-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.post-ad-btn i {
    margin-right: 8px;
}

/* Section Headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-top: 40px;
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    color: var(--gray-800);
}

.see-all-btn {
    background: none;
    border: 1px solid var(--primary-red);
    color: var(--primary-red);
    padding: 8px 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.see-all-btn:hover {
    background: var(--primary-red);
    color: var(--white);
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.category-card {
    position: relative;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    height: 200px;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.category-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
}

.category-name {
    position: absolute;
    bottom: 20px;
    left: 20px;
    color: var(--white);
    font-size: 1.2rem;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

/* Listings Grid */
.listings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.listing-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.listing-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-red);
}

.listing-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--gray-100);
}

.listing-content {
    padding: 15px;
}

.listing-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 8px;
    line-height: 1.4;
}

.listing-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 8px;
}

.listing-location {
    color: var(--gray-500);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Search Screen */
.search-container {
    display: flex;
    gap: 30px;
    padding: 30px 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

.search-filters {
    width: 280px;
    background: var(--white);
    padding: 20px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    height: fit-content;
    position: sticky;
    top: 90px;
}

.filter-group {
    margin-bottom: 20px;
}

.filter-group label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.filter-group select,
.filter-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    transition: var(--transition);
}

.filter-group select:focus,
.filter-group input:focus {
    border-color: var(--primary-red);
    outline: none;
    box-shadow: 0 0 0 3px rgba(227, 30, 36, 0.1);
}

.price-range {
    display: flex;
    align-items: center;
    gap: 10px;
}

.price-range input {
    flex: 1;
}

.apply-filters-btn {
    width: 100%;
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 12px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.apply-filters-btn:hover {
    background: var(--primary-red-dark);
}

.search-results {
    flex: 1;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--gray-200);
}

.results-count {
    color: var(--gray-600);
    font-weight: 500;
}

#sort-options {
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    background: var(--white);
    cursor: pointer;
}

/* Create Listing Screen */
.create-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 30px 20px;
}

.create-container h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 30px;
    text-align: center;
}

.create-form {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 200px;
    gap: 20px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary-red);
    outline: none;
    box-shadow: 0 0 0 3px rgba(227, 30, 36, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.image-upload {
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    text-align: center;
    transition: var(--transition);
}

.image-upload:hover {
    border-color: var(--primary-red);
}

.upload-area {
    cursor: pointer;
    padding: 20px;
}

.upload-area i {
    font-size: 2rem;
    color: var(--gray-400);
    margin-bottom: 10px;
}

.upload-area p {
    color: var(--gray-600);
    font-weight: 500;
}

.image-previews {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 10px;
    margin-top: 15px;
}

.image-preview {
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

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

.remove-image {
    position: absolute;
    top: 5px;
    right: 5px;
    background: var(--danger);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

.cancel-btn {
    background: var(--white);
    color: var(--gray-600);
    border: 1px solid var(--gray-300);
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.cancel-btn:hover {
    background: var(--gray-50);
}

.submit-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.submit-btn:hover {
    background: var(--primary-red-dark);
}

/* Messages Screen */
.messages-container {
    display: flex;
    height: calc(100vh - 150px);
    max-width: 1200px;
    margin: 0 auto;
    gap: 1px;
    background: var(--gray-200);
}

.conversations-list {
    width: 350px;
    background: var(--white);
    display: flex;
    flex-direction: column;
}

.conversations-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
}

.conversations-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
}

.new-message-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.new-message-btn:hover {
    background: var(--primary-red-dark);
}

.conversations {
    flex: 1;
    overflow-y: auto;
}

.conversation-item {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    cursor: pointer;
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-100);
}

.conversation-item:hover {
    background: var(--gray-50);
}

.conversation-item.active {
    background: var(--secondary-red);
    border-right: 3px solid var(--primary-red);
}

.conversation-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
    background: var(--gray-200);
}

.conversation-info {
    flex: 1;
}

.conversation-name {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.conversation-last-message {
    color: var(--gray-500);
    font-size: 0.9rem;
    line-height: 1.3;
}

.conversation-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 5px;
}

.conversation-time {
    color: var(--gray-400);
    font-size: 0.8rem;
}

.unread-badge {
    background: var(--primary-red);
    color: var(--white);
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.chat-area {
    flex: 1;
    background: var(--white);
    display: flex;
    flex-direction: column;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
}

.chat-user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.chat-avatar {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-200);
}

.chat-user-details h3 {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 2px;
}

.last-seen {
    color: var(--gray-500);
    font-size: 0.9rem;
}

.chat-actions {
    display: flex;
    gap: 10px;
}

.chat-btn {
    background: none;
    border: none;
    padding: 8px;
    border-radius: var(--border-radius);
    cursor: pointer;
    color: var(--gray-500);
    transition: var(--transition);
}

.chat-btn:hover {
    background: var(--gray-100);
    color: var(--primary-red);
}

.messages-list {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    align-items: flex-end;
    gap: 10px;
}

.message.sent {
    flex-direction: row-reverse;
    justify-content: flex-start;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-200);
}

.message-content {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: var(--border-radius-lg);
    font-size: 0.95rem;
    line-height: 1.4;
}

.message.received .message-content {
    background: var(--gray-100);
    color: var(--gray-800);
    border-bottom-left-radius: 6px;
}

.message.sent .message-content {
    background: var(--primary-red);
    color: var(--white);
    border-bottom-right-radius: 6px;
}

.message-time {
    font-size: 0.8rem;
    color: var(--gray-400);
    margin-top: 5px;
    text-align: right;
}

.message.sent .message-time {
    color: rgba(255, 255, 255, 0.8);
}

.message-input {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    border-top: 1px solid var(--gray-200);
}

#message-text {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

#message-text:focus {
    border-color: var(--primary-red);
}

.send-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn:hover {
    background: var(--primary-red-dark);
}

/* Profile Screen */
.profile-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 30px 20px;
}

.profile-header {
    background: var(--white);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 30px;
}

.profile-avatar {
    position: relative;
}

.avatar-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-200);
    border: 4px solid var(--white);
    box-shadow: var(--shadow-md);
}

.edit-avatar-btn {
    position: absolute;
    bottom: 5px;
    right: 5px;
    background: var(--primary-red);
    color: var(--white);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.edit-avatar-btn:hover {
    background: var(--primary-red-dark);
}

.profile-info {
    flex: 1;
}

.profile-info h2 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 8px;
}

.profile-info p {
    color: var(--gray-600);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.profile-stats {
    display: flex;
    gap: 30px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.9rem;
    text-transform: uppercase;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.profile-actions {
    display: flex;
    align-items: center;
}

.edit-profile-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.edit-profile-btn:hover {
    background: var(--primary-red-dark);
}

.profile-tabs {
    display: flex;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    margin-bottom: 30px;
    overflow: hidden;
}

.tab-btn {
    flex: 1;
    background: none;
    border: none;
    padding: 15px 20px;
    cursor: pointer;
    font-weight: 500;
    color: var(--gray-600);
    transition: var(--transition);
    border-right: 1px solid var(--gray-200);
}

.tab-btn:last-child {
    border-right: none;
}

.tab-btn:hover {
    background: var(--gray-50);
}

.tab-btn.active {
    background: var(--primary-red);
    color: var(--white);
}

.profile-content {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    padding: 30px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.settings-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--gray-50);
    border-radius: var(--border-radius);
}

.setting-info {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--gray-700);
    font-weight: 500;
}

.setting-info i {
    width: 20px;
    color: var(--primary-red);
}

.setting-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.setting-btn:hover {
    background: var(--primary-red-dark);
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--gray-300);
    transition: var(--transition);
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--white);
    transition: var(--transition);
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-red);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    display: flex;
    padding: 10px 0 max(10px, env(safe-area-inset-bottom));
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-500);
    transition: var(--transition);
    position: relative;
}

.nav-item:hover {
    color: var(--primary-red);
}

.nav-item.active {
    color: var(--primary-red);
}

.nav-item i {
    font-size: 1.2rem;
}

.nav-label {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition);
}

.modal.show .modal-content {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-800);
}

.close-btn, .back-btn {
    background: none;
    border: none;
    padding: 8px;
    border-radius: var(--border-radius);
    cursor: pointer;
    color: var(--gray-500);
    transition: var(--transition);
}

.close-btn:hover, .back-btn:hover {
    background: var(--gray-100);
    color: var(--primary-red);
}

.modal-body {
    padding: 20px;
}

/* Auth Form */
.auth-form {
    margin-bottom: 20px;
}

.password-field {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    transition: var(--transition);
}

.toggle-password:hover {
    color: var(--primary-red);
}

.auth-submit-btn {
    width: 100%;
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 12px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 20px;
}

.auth-submit-btn:hover {
    background: var(--primary-red-dark);
}

.auth-divider {
    text-align: center;
    position: relative;
    margin: 20px 0;
    color: var(--gray-500);
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--gray-200);
    z-index: 1;
}

.auth-divider span {
    background: var(--white);
    padding: 0 15px;
    position: relative;
    z-index: 2;
}

.social-auth {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    background: var(--white);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.social-btn:hover {
    background: var(--gray-50);
}

.google-btn {
    color: #4285F4;
}

.facebook-btn {
    color: #1877F2;
}

.auth-footer {
    text-align: center;
    color: var(--gray-600);
}

.link-btn {
    background: none;
    border: none;
    color: var(--primary-red);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.link-btn:hover {
    color: var(--primary-red-dark);
    text-decoration: underline;
}

/* Listing Detail Modal */
.listing-detail {
    max-width: 800px;
    width: 95%;
}

.listing-actions {
    display: flex;
    gap: 10px;
}

.action-btn {
    background: var(--gray-100);
    border: none;
    padding: 10px;
    border-radius: var(--border-radius);
    cursor: pointer;
    color: var(--gray-600);
    transition: var(--transition);
}

.action-btn:hover {
    background: var(--secondary-red);
    color: var(--primary-red);
}

.action-btn.active {
    background: var(--primary-red);
    color: var(--white);
}

.listing-images {
    margin-bottom: 20px;
}

.main-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: 15px;
}

.image-thumbnails {
    display: flex;
    gap: 10px;
    overflow-x: auto;
}

.thumbnail {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--border-radius);
    cursor: pointer;
    opacity: 0.7;
    transition: var(--transition);
}

.thumbnail:hover,
.thumbnail.active {
    opacity: 1;
}

.listing-info h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 10px;
}

.listing-info .listing-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 8px;
}

.listing-info .listing-location {
    color: var(--gray-600);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.listing-description {
    color: var(--gray-700);
    line-height: 1.6;
    margin-bottom: 20px;
}

.listing-contact {
    border-top: 1px solid var(--gray-200);
    padding-top: 20px;
}

.contact-btn {
    background: var(--primary-red);
    color: var(--white);
    border: none;
    padding: 15px 30px;
    border-radius: var(--border-radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-btn:hover {
    background: var(--primary-red-dark);
}

/* Notifications */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 15px 20px;
    z-index: 3000;
    transform: translateX(100%);
    transition: var(--transition);
    max-width: 350px;
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.notification-icon {
    font-size: 1.2rem;
}

.notification.success .notification-icon {
    color: var(--success);
}

.notification.error .notification-icon {
    color: var(--danger);
}

.notification.info .notification-icon {
    color: var(--info);
}

.notification-message {
    color: var(--gray-800);
    font-weight: 500;
}

/* Reviews */
.reviews-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.review-item {
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-200);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--gray-200);
}

.review-user {
    flex: 1;
}

.review-name {
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.review-date {
    color: var(--gray-500);
    font-size: 0.9rem;
}

.review-rating {
    color: #FFD700;
}

.review-text {
    color: var(--gray-700);
    line-height: 1.6;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    color: var(--gray-300);
}

.empty-state h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-600);
    margin-bottom: 10px;
}

.empty-state p {
    font-size: 1.1rem;
    margin-bottom: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-center {
        display: none;
    }
    
    .nav-right {
        gap: 10px;
    }
    
    .welcome-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .search-container {
        flex-direction: column;
        gap: 20px;
    }
    
    .search-filters {
        width: 100%;
        position: relative;
        top: auto;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .messages-container {
        height: calc(100vh - 80px);
    }
    
    .conversations-list {
        width: 100%;
        max-width: 100%;
    }
    
    .chat-area {
        display: none;
    }
    
    .chat-area.active {
        display: flex;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 10;
    }
    
    .profile-header {
        flex-direction: column;
        text-align: center;
    }
    
    .profile-tabs {
        flex-wrap: wrap;
    }
    
    .tab-btn {
        flex: none;
        min-width: calc(50% - 1px);
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    .categories-grid,
    .listings-grid {
        grid-template-columns: 1fr;
    }
    
    .welcome-section {
        padding: 40px 0;
    }
    
    .create-form {
        padding: 20px;
    }
    
    .profile-stats {
        gap: 15px;
    }
    
    .stat {
        flex: 1;
    }
    
    .tab-btn {
        min-width: 100%;
    }
}

/* Print Styles */
@media print {
    .top-nav,
    .bottom-nav,
    .modal,
    .notification {
        display: none !important;
    }
    
    .main-content {
        padding-bottom: 0;
    }
    
    .screen {
        display: block !important;
    }
    
    * {
        box-shadow: none !important;
    }
}