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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-light: #f8fafc;
    --border-color: #e2e8f0;
    --card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --gold: #fbbf24;
    --silver: #94a3b8;
    --bronze: #cd7f32;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-light);
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: var(--card-shadow);
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Ad Containers */
.ad-container {
    margin: 1.5rem auto;
    text-align: center;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-header {
    max-width: 1200px;
    padding: 0 20px;
}

.ad-incontent {
    margin: 3rem auto;
    max-width: 1200px;
    padding: 0 20px;
}

.ad-sidebar {
    margin-bottom: 2rem;
}

/* Category Navigation */
.category-nav {
    background: white;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1rem 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.category-tab {
    padding: 0.6rem 1.2rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
    white-space: nowrap;
}

.category-tab:hover {
    background: var(--bg-light);
    color: var(--text-color);
}

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

/* Main Content */
.main-content {
    padding: 2rem 0;
    min-height: 60vh;
}


/* Apps Grid - Fixed Layout */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* App Card */
.app-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
}

.app-card-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1rem;
}

.app-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--bg-light);
}

.app-card-info {
    flex: 1;
    min-width: 0;
}

.app-name {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-color);
}

.app-category-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    color: var(--text-light);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.rank-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    color: white;
}

.rank-badge.rank-1 {
    background: var(--gold);
}

.rank-badge.rank-2 {
    background: var(--silver);
}

.rank-badge.rank-3 {
    background: var(--bronze);
}

.rank-badge.rank-other {
    background: var(--secondary-color);
}

.app-description {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.app-card-footer {
    margin-top: auto;
    display: flex;
    gap: 0.5rem;
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
    text-align: center;
}

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

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

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

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

/* Detail View */
.back-button {
    background: white;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 2rem;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-color);
}

.back-button:hover {
    background: var(--bg-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.detail-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    background: white;
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
}

.detail-main {
    min-width: 0;
}

.detail-hero {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.detail-icon {
    width: 120px;
    height: 120px;
    border-radius: 20px;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--bg-light);
}

.detail-header {
    flex: 1;
}

.detail-title-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.detail-name {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-color);
}

.detail-category {
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-top: 1rem;
}

.detail-meta-item {
    color: var(--text-light);
    font-size: 0.9rem;
}

.detail-section {
    margin-bottom: 2rem;
}

.detail-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.detail-description {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 1rem;
}

.features-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 0.75rem;
}

.features-list li {
    padding: 0.75rem;
    background: var(--bg-light);
    border-radius: 6px;
    color: var(--text-color);
    position: relative;
    padding-left: 2rem;
}

.features-list li::before {
    content: "✓";
    position: absolute;
    left: 0.75rem;
    color: var(--primary-color);
    font-weight: bold;
}

.screenshots-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.screenshot-item {
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: var(--bg-light);
}

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

.detail-cta {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.detail-cta .btn {
    flex: 1;
    min-width: 150px;
    padding: 1rem 2rem;
    font-size: 1rem;
}

.detail-sidebar {
    display: block;
}

/* Footer */
.footer {
    background: white;
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-light);
    margin-top: 3rem;
}

/* Loading State */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--text-light);
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}