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

:root {
    /* Telegram Theme Variables */
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #0088cc;
    --tg-theme-button-color: #0088cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f1f1f1;
    
    /* Custom Colors */
    --primary-color: #0088cc;
    --success-color: #4caf50;
    --error-color: #f44336;
    --warning-color: #ff9800;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    min-height: 100vh;
    padding-bottom: 80px;
}

/* Заголовок */
.header {
    background: var(--tg-theme-bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 16px;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 8px;
}

.icon-button {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.2s;
}

.icon-button:hover {
    background: var(--tg-theme-secondary-bg-color);
}

.icon-button:active {
    transform: scale(0.95);
}

/* Поиск */
.search-container {
    padding: 16px;
    background: var(--tg-theme-bg-color);
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--tg-theme-secondary-bg-color);
    border-radius: 24px;
    padding: 12px 16px;
    max-width: 600px;
    margin: 0 auto;
}

.search-icon {
    margin-right: 8px;
    font-size: 20px;
}

.search-input {
    flex: 1;
    border: none;
    background: none;
    outline: none;
    font-size: 16px;
    color: var(--tg-theme-text-color);
}

.search-input::placeholder {
    color: var(--tg-theme-hint-color);
}

.search-clear {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--tg-theme-hint-color);
    padding: 4px;
}

/* Категории */
.categories-container {
    padding: 16px;
    background: var(--tg-theme-bg-color);
    border-bottom: 1px solid var(--border-color);
}

.categories-scroll {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.categories-scroll::-webkit-scrollbar {
    display: none;
}

.category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
    background: var(--tg-theme-secondary-bg-color);
    border-radius: 12px;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
    min-width: 70px;
}

.category-item:hover {
    transform: translateY(-2px);
}

.category-item.active {
    background: var(--primary-color);
    color: white;
}

.category-icon {
    font-size: 24px;
}

.category-name {
    font-size: 12px;
    font-weight: 500;
}

/* Основной контент */
.main-content {
    max-width: 600px;
    margin: 0 auto;
    padding: 16px;
}

/* Загрузка */
.loading {
    text-align: center;
    padding: 40px 20px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Сетка объявлений */
.listings-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.listing-card {
    background: var(--tg-theme-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
}

.listing-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.listing-image {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    background: var(--tg-theme-secondary-bg-color);
}

.listing-image-placeholder {
    width: 100%;
    aspect-ratio: 1;
    background: var(--tg-theme-secondary-bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--tg-theme-hint-color);
}

.listing-content {
    padding: 12px;
}

.listing-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.listing-price {
    font-size: 16px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.listing-location {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
}

.listing-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

.listing-date {
    font-size: 11px;
    color: var(--tg-theme-hint-color);
}

.listing-views {
    font-size: 11px;
    color: var(--tg-theme-hint-color);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Пустое состояние */
.empty-state,
.error-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-icon,
.error-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.empty-state h3,
.error-state h3 {
    margin-bottom: 8px;
}

.empty-state p,
.error-state p {
    color: var(--tg-theme-hint-color);
    margin-bottom: 24px;
}

/* Кнопки */
.button {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--tg-theme-secondary-bg-color);
    color: var(--tg-theme-text-color);
}

.button.primary {
    background: var(--primary-color);
    color: white;
}

.button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.button:active {
    transform: translateY(0);
}

/* FAB (Floating Action Button) */
.fab {
    position: fixed;
    bottom: 80px;
    right: 16px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 136, 204, 0.4);
    z-index: 1000;
    transition: all 0.2s;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 16px rgba(0, 136, 204, 0.5);
}

.fab:active {
    transform: scale(0.95);
}

/* Модальное окно */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    display: flex;
    align-items: flex-end;
    animation: fadeIn 0.2s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--tg-theme-bg-color);
    border-radius: 20px 20px 0 0;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s;
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--tg-theme-bg-color);
    z-index: 1;
}

.modal-header h2 {
    font-size: 20px;
    font-weight: bold;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.2s;
}

.modal-close:hover {
    background: var(--tg-theme-secondary-bg-color);
}

.modal-body {
    padding: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.form-actions .button {
    flex: 1;
}

/* Загрузка изображений */
.image-upload-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.image-upload-btn {
    display: inline-block;
    padding: 24px;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

.image-upload-btn:hover {
    border-color: var(--primary-color);
    background: var(--tg-theme-secondary-bg-color);
}

.uploaded-images {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.uploaded-image {
    position: relative;
    aspect-ratio: 1;
    border-radius: 8px;
    overflow: hidden;
}

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

.uploaded-image-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Toast уведомления */
.toast-container {
    position: fixed;
    top: 16px;
    left: 16px;
    right: 16px;
    z-index: 3000;
    pointer-events: none;
}

.toast {
    background: var(--tg-theme-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 8px;
    box-shadow: var(--shadow);
    animation: toastSlideIn 0.3s;
    pointer-events: auto;
}

@keyframes toastSlideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--error-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

/* Адаптивность */
@media (max-width: 480px) {
    .listings-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}