/* =============================================================================
   TESIVIL App Hub - Main Styles
   Premium Modern-Tech Design System
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS Variables - Design Tokens (Dark Theme - Default)
   ----------------------------------------------------------------------------- */
:root {
    /* Colors - Dark Mode Premium */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #60a5fa;

    --color-background: #0f172a;
    --color-background-secondary: #1e293b;
    --color-surface: #1e293b;
    --color-surface-hover: #334155;
    --color-surface-border: #334155;

    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;

    --color-accent: #8b5cf6;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Category Colors */
    --color-android: #3ddc84;
    --color-web: #3b82f6;
    --color-desktop: #8b5cf6;
    --color-api: #f59e0b;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);

    /* Header background */
    --header-bg: rgba(15, 23, 42, 0.8);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-3xl: 2rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Layout */
    --container-max: 1400px;
    --header-height: 72px;
}

/* -----------------------------------------------------------------------------
   Light Theme
   ----------------------------------------------------------------------------- */
[data-theme="light"] {
    --color-background: #f8fafc;
    --color-background-secondary: #f1f5f9;
    --color-surface: #ffffff;
    --color-surface-hover: #f1f5f9;
    --color-surface-border: #e2e8f0;

    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.2);

    --header-bg: rgba(248, 250, 252, 0.9);
}

/* -----------------------------------------------------------------------------
   Reset & Base Styles
   ----------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-light);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    outline: none;
}

/* -----------------------------------------------------------------------------
   Layout Components
   ----------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    background: var(--header-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-surface-border);
    transition: background-color var(--transition-base);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Header Controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.control-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-surface-border);
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.lang-btn {
    width: auto;
    padding: 0 var(--spacing-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo-text span {
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.1) 0%, transparent 100%);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Category Filter */
.category-filter {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    padding: var(--spacing-lg) 0;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.filter-btn:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
}

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

/* -----------------------------------------------------------------------------
   App Cards Grid
   ----------------------------------------------------------------------------- */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--spacing-lg);
    padding: var(--spacing-xl) 0;
}

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

@media (min-width: 1024px) {
    .apps-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1280px) {
    .apps-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* App Card */
.app-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--color-surface-border);
    transition: all var(--transition-base);
    cursor: pointer;
}

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

.card-preview {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--color-background);
}

.card-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.app-card:hover .card-preview img {
    transform: scale(1.05);
}

.card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.app-card:hover .card-overlay {
    opacity: 1;
}

.view-details {
    color: white;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
}

.card-content {
    padding: var(--spacing-lg);
}

.card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    flex-shrink: 0;
    background: var(--color-background);
}

.card-title-group {
    flex: 1;
    min-width: 0;
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-category {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-android {
    background: rgba(61, 220, 132, 0.15);
    color: var(--color-android);
}

.category-web {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-web);
}

.category-desktop {
    background: rgba(139, 92, 246, 0.15);
    color: var(--color-desktop);
}

.category-api {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-api);
}

.category-default {
    background: rgba(148, 163, 184, 0.15);
    color: var(--color-text-secondary);
}

.card-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-cta {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    font-weight: 600;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.card-cta:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-glow);
}

/* -----------------------------------------------------------------------------
   Skeleton Loading States
   ----------------------------------------------------------------------------- */
.skeleton-card {
    pointer-events: none;
}

.skeleton-shimmer {
    background: linear-gradient(90deg,
            var(--color-surface) 25%,
            var(--color-surface-hover) 50%,
            var(--color-surface) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

.skeleton-preview {
    aspect-ratio: 16 / 10;
}

.skeleton-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
}

.skeleton-title {
    height: 24px;
    border-radius: var(--radius-sm);
    width: 80%;
    margin-bottom: var(--spacing-sm);
}

.skeleton-category {
    height: 20px;
    border-radius: var(--radius-full);
    width: 60px;
}

.skeleton-description {
    height: 16px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.skeleton-description.short {
    width: 70%;
}

.skeleton-button {
    height: 44px;
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-md);
}

/* -----------------------------------------------------------------------------
   Empty & Error States
   ----------------------------------------------------------------------------- */
.empty-state,
.error-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-secondary);
}

.empty-state svg,
.error-state svg {
    margin: 0 auto var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3,
.error-state h3 {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.empty-state p,
.error-state p {
    margin-bottom: var(--spacing-lg);
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-surface);
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-surface-border);
    transition: all var(--transition-base);
}

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

/* -----------------------------------------------------------------------------
   Detail Page Styles
   ----------------------------------------------------------------------------- */
.detail-page {
    min-height: 100vh;
    padding-bottom: var(--spacing-2xl);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    padding: var(--spacing-lg) 0;
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: var(--color-primary);
}

.detail-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) 0;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .detail-header {
        flex-direction: row;
        text-align: left;
    }
}

.detail-icon {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-3xl);
    object-fit: cover;
    box-shadow: var(--shadow-lg);
    flex-shrink: 0;
}

.detail-info {
    flex: 1;
}

.detail-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.detail-category {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-preview {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    margin: var(--spacing-xl) 0;
}

.detail-section {
    margin-bottom: var(--spacing-xl);
}

.detail-section h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.detail-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.features-list {
    list-style: none;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-surface-border);
    color: var(--color-text-secondary);
}

.feature-item svg {
    color: var(--color-success);
    flex-shrink: 0;
}

.detail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-xl) 0;
}

/* -----------------------------------------------------------------------------
   Footer
   ----------------------------------------------------------------------------- */
.footer {
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-surface-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-logo {
    font-weight: 700;
    color: var(--color-text-secondary);
}

.footer-logo span {
    color: var(--color-primary);
}

/* -----------------------------------------------------------------------------
   Screenshots Gallery
   ----------------------------------------------------------------------------- */
.screenshots-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

@media (min-width: 768px) {
    .screenshots-gallery {
        grid-template-columns: repeat(3, 1fr);
    }
}

.screenshot-item {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--color-surface-border);
    transition: all var(--transition-base);
}

.screenshot-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

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

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-xl);
}

.lightbox-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--font-size-2xl);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* -----------------------------------------------------------------------------
   Utilities
   ----------------------------------------------------------------------------- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.hidden {
    display: none !important;
}

/* -----------------------------------------------------------------------------
   Legal Links
   ----------------------------------------------------------------------------- */
.legal-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
}

.legal-links a {
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.legal-links a:hover {
    color: var(--color-primary);
}

.legal-separator {
    color: var(--color-surface-border);
}