/* ==========================================================================
   Leasing Radar WebApp — Glassmorphism Theme & Telegram Dynamic Palette
   ========================================================================== */

:root {
    --bg-color: var(--tg-theme-bg-color, #0b0f19);
    --secondary-bg-color: var(--tg-theme-secondary-bg-color, #131d2e);
    --text-color: var(--tg-theme-text-color, #f8fafc);
    --hint-color: var(--tg-theme-hint-color, #94a3b8);
    --link-color: var(--tg-theme-link-color, #38bdf8);
    --button-color: var(--tg-theme-button-color, #2563eb);
    --button-text-color: var(--tg-theme-button-text-color, #ffffff);

    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 14px;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-orange: #f59e0b;
    --accent-blue: #3b82f6;

    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --shadow-card: 0 8px 32px 0 rgba(0, 0, 0, 0.36);
}

/* Fallback for browsers without backdrop-filter */
@supports not (backdrop-filter: blur(10px)) {
    .glass-card,
    .header,
    .modal-content,
    .filter-chip,
    .tab-btn {
        background: #1e293b !important;
    }
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding-bottom: 40px;
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   Header & Sticky Navigation
   ========================================================================== */

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 16px 14px;
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    font-size: 26px;
}

.logo-text h1 {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-color);
    line-height: 1.2;
}

.badge {
    display: inline-block;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 2px 6px;
    border-radius: 4px;
}

.live-badge {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.lots-badge {
    font-size: 12px;
    font-weight: 600;
    color: var(--hint-color);
    background: rgba(255, 255, 255, 0.05);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
}

/* Search Bar */
.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    margin-bottom: 12px;
}

.search-icon {
    position: absolute;
    left: 12px;
    font-size: 16px;
    pointer-events: none;
    opacity: 0.7;
}

.search-input {
    width: 100%;
    padding: 10px 38px 10px 38px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: 14px;
    outline: none;
    transition: all 0.2s ease;
}

.search-input:focus {
    border-color: var(--button-color);
    background: rgba(15, 23, 42, 0.9);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

.clear-btn {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--hint-color);
    font-size: 14px;
    cursor: pointer;
    padding: 4px;
}

/* Category Navigation Tabs */
.category-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: none;
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    white-space: nowrap;
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--hint-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn.active {
    background: var(--button-color);
    color: var(--button-text-color);
    border-color: var(--button-color);
    box-shadow: 0 2px 10px rgba(37, 99, 235, 0.4);
}

/* Secondary Filter Controls */
.filter-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 4px;
}

.filter-chip-group {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
}

.filter-chip-group::-webkit-scrollbar {
    display: none;
}

.filter-chip {
    padding: 5px 10px;
    font-size: 12px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--hint-color);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.filter-chip.active {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-green);
    border-color: rgba(16, 185, 129, 0.4);
}

.select-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.filter-select {
    padding: 8px 10px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text-color);
    font-size: 12px;
    outline: none;
    cursor: pointer;
}

/* ==========================================================================
   Main Content & Lot Cards
   ========================================================================== */

.main-content {
    padding: 16px;
}

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

@media (min-width: 640px) {
    .lots-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.lot-card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.lot-card:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Image & Top Badges */
.card-media-wrapper {
    position: relative;
    width: 100%;
    height: 200px;
    background: #0f172a;
    overflow: hidden;
    cursor: pointer;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.card-media-wrapper:hover .card-img {
    transform: scale(1.03);
}

.card-badges {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    z-index: 2;
}

.discount-badge {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: #ffffff;
    font-size: 12px;
    font-weight: 800;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.5);
}

.source-badge {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(8px);
    color: var(--text-color);
    font-size: 11px;
    font-weight: 600;
    padding: 3px 7px;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.photo-count-badge {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    color: #ffffff;
    font-size: 11px;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Card Body */
.card-body {
    padding: 14px 16px 16px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card-header {
    margin-bottom: 8px;
}

.card-category-tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--hint-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.3;
    margin-top: 2px;
}

.card-specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    margin: 10px 0 14px;
    font-size: 12px;
}

.spec-item {
    color: var(--hint-color);
}

.spec-item strong {
    color: var(--text-color);
    font-weight: 600;
}

/* Price Box */
.card-price-box {
    margin-top: auto;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 12px;
}

.current-price {
    font-size: 18px;
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -0.3px;
}

.original-price {
    font-size: 12px;
    color: var(--hint-color);
    text-decoration: line-through;
}

.ruble-discount {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-green);
}

/* Card Actions */
.card-actions {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 8px;
}

.btn-secondary {
    padding: 9px 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-book {
    padding: 9px 14px;
    background: var(--button-color);
    border: none;
    border-radius: var(--radius-md);
    color: var(--button-text-color);
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-book:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
}

/* ==========================================================================
   Modals (Photo Carousel & Booking Form)
   ========================================================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 540px;
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.modal-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-color);
}

.counter-badge {
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--hint-color);
    font-size: 18px;
    cursor: pointer;
    padding: 4px 8px;
}

/* Carousel */
.carousel-viewport {
    position: relative;
    width: 100%;
    height: 340px;
    background: #050811;
    display: flex;
    align-items: center;
    justify-content: center;
    touch-action: pan-y;
}

.carousel-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    user-select: none;
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #ffffff;
    font-size: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
    transition: background 0.2s;
}

.carousel-arrow:hover {
    background: rgba(0, 0, 0, 0.9);
}

.arrow-left {
    left: 12px;
}

.arrow-right {
    right: 12px;
}

.carousel-footer {
    padding: 10px 16px;
    text-align: center;
    font-size: 12px;
    color: var(--hint-color);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* Booking Form */
.book-modal-body {
    padding: 16px 20px 22px;
}

.book-lot-summary {
    background: rgba(15, 23, 42, 0.6);
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    border: 1px solid var(--card-border);
}

.form-group {
    margin-bottom: 14px;
}

.form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--hint-color);
    margin-bottom: 6px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: 14px;
    outline: none;
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--button-color);
}

.form-error {
    font-size: 11px;
    color: var(--accent-red);
    margin-top: 4px;
    display: block;
}

.primary-btn {
    width: 100%;
    padding: 12px;
    background: var(--button-color);
    border: none;
    border-radius: var(--radius-md);
    color: var(--button-text-color);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
    transition: all 0.2s;
}

.primary-btn:hover {
    filter: brightness(1.1);
}

.book-success {
    text-align: center;
    padding: 20px 10px;
}

.success-icon {
    font-size: 48px;
    display: block;
    margin-bottom: 10px;
}

.book-success h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.book-success p {
    font-size: 13px;
    color: var(--hint-color);
    margin-bottom: 16px;
}

/* ==========================================================================
   States (Loading, Empty, Pagination)
   ========================================================================== */

.loading-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--hint-color);
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--button-color);
    border-radius: 50%;
    margin: 0 auto 14px;
    animation: spin 0.8s linear infinite;
}

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

.empty-state {
    text-align: center;
    padding: 40px 20px;
    margin-top: 20px;
    border-radius: var(--radius-lg);
}

.empty-icon {
    font-size: 42px;
    margin-bottom: 12px;
}

.empty-state h3 {
    font-size: 16px;
    margin-bottom: 6px;
}

.empty-state p {
    font-size: 13px;
    color: var(--hint-color);
    margin-bottom: 16px;
}

.empty-state .primary-btn {
    max-width: 240px;
    margin: 0 auto;
}

.pagination-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    margin-top: 20px;
    border-radius: var(--radius-md);
}

.page-nav-btn {
    padding: 8px 14px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    color: var(--text-color);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.page-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-indicator {
    font-size: 13px;
    font-weight: 600;
    color: var(--hint-color);
}

.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease;
    z-index: 2000;
    pointer-events: none;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}