/* ==========================================================================
   GameHub - Online Games Platform
   ========================================================================== */

/* ==========================================================================
   CSS Variables / Custom Properties
   ========================================================================== */

:root {
    /* Colors */
    --color-primary: #1e293b;
    --color-secondary: #64748b;
    --color-accent: #3b82f6;
    --color-background: #f8fafc;
    --color-surface: #ffffff;
    --color-overlay: rgba(0, 0, 0, 0.5);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 60px;
    --spacing-4xl: 80px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 100;
    --z-overlay: 1000;
}

/* ==========================================================================
   Reset and Base Styles
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
}

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

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

.header {
    background: #dc2626;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 var(--spacing-lg);
    height: 72px;
}

/* Logo */
.logo h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
}

/* Navigation Right Section */
.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

/* Desktop Navigation Menu */
.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 1.2rem;
    font-style: italic;
    transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: white;
    background: rgba(255, 255, 255, 0.2);
}

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Search Icon */
.search-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: white;
}

.search-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: white;
    transition: all var(--transition-normal);
}

.mobile-menu-btn:hover span {
    background: white;
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    z-index: var(--z-overlay);
    display: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.mobile-menu-overlay.active {
    display: block;
    opacity: 1;
}

.mobile-menu-content {
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    padding: var(--spacing-lg);
}

.mobile-menu-overlay.active .mobile-menu-content {
    transform: translateX(0);
}

.mobile-menu-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-secondary);
    transition: color var(--transition-fast);
}

.mobile-menu-close:hover {
    color: var(--color-primary);
}

.mobile-nav-menu {
    list-style: none;
    margin-top: var(--spacing-3xl);
    padding: 0;
}

.mobile-nav-menu li {
    margin-bottom: var(--spacing-sm);
}

.mobile-nav-menu a {
    display: block;
    color: var(--color-secondary);
    text-decoration: none;
    padding: var(--spacing-md) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 1.2rem;
    font-style: italic;
    transition: all var(--transition-fast);
}

.mobile-nav-menu a:hover,
.mobile-nav-menu a.active {
    color: var(--color-primary);
    background: #f1f5f9;
}

.mobile-search {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: var(--spacing-lg);
    right: var(--spacing-lg);
}

.mobile-search .search-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto;
}

/* Search Modal Overlay */
.search-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-overlay);
    display: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.search-modal-overlay.active {
    display: block;
    opacity: 1;
}

.search-modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    width: 90%;
    max-width: 500px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-normal);
    padding: 0;
    overflow: hidden;
}

.search-modal-overlay.active .search-modal-content {
    transform: translate(-50%, -50%) scale(1);
}

.search-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: #64748b;
    transition: color var(--transition-fast);
    z-index: 10;
}

.search-modal-close:hover {
    color: #1e293b;
}

.search-modal-header {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    color: white;
    padding: var(--spacing-lg) var(--spacing-2xl);
    text-align: center;
}

.search-modal-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
}

.search-modal-body {
    padding: var(--spacing-2xl);
}

.search-input-wrapper {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    align-items: center;
}

.search-input-wrapper input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid #e2e8f0;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 500;
    transition: all var(--transition-fast);
    outline: none;
}

.search-input-wrapper input:focus {
    border-color: #dc2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.search-input-wrapper input::placeholder {
    color: #94a3b8;
}

.search-submit-btn {
    background: #dc2626;
    color: white;
    border: none;
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
}

.search-submit-btn:hover {
    background: #b91c1c;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
}

.search-submit-btn:active {
    transform: translateY(0);
}

.search-suggestions {
    margin-top: var(--spacing-lg);
}

.search-suggestions h3 {
    color: #1e293b;
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.suggestion-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.suggestion-tag {
    background: #f1f5f9;
    color: #475569;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.suggestion-tag:hover {
    background: #dc2626;
    color: white;
    border-color: #dc2626;
    transform: translateY(-2px);
}

.suggestion-tag:active {
    transform: translateY(0);
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.main-content {
    margin-top: 0;
}

/* ==========================================================================
   Game Categories
   ========================================================================== */

.game-category {
    margin-bottom: 0;
    padding: var(--spacing-3xl) var(--spacing-lg);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    min-height: 600px;
}

.game-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.3));
    z-index: 1;
}

.category-content {
    position: relative;
    z-index: 2;
    width: 100%;
}

.category-content h2 {
    color: var(--color-surface);
    font-size: var(--font-size-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    justify-items: center;
    width: 100%;
}

/* ==========================================================================
   Game Items
   ========================================================================== */

.game-item {
    cursor: pointer;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: transparent;
    display: inline-block;
}

.game-item:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.game-item img {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: var(--radius-md);
    transition: transform var(--transition-normal);
    display: block;
}

.game-item:hover img {
    transform: scale(1.1);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    background: var(--color-primary);
    color: var(--color-surface);
    padding: var(--spacing-2xl) var(--spacing-lg);
    margin-top: 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-surface);
}

/* ==========================================================================
   Loading and Animation
   ========================================================================== */

.game-item {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Stagger animation for game items */
.game-item:nth-child(1) { animation-delay: 0.1s; }
.game-item:nth-child(2) { animation-delay: 0.2s; }
.game-item:nth-child(3) { animation-delay: 0.3s; }
.game-item:nth-child(4) { animation-delay: 0.4s; }
.game-item:nth-child(5) { animation-delay: 0.5s; }
.game-item:nth-child(6) { animation-delay: 0.6s; }

/* ==========================================================================
   Focus States
   ========================================================================== */

.nav-menu a:focus,
.search-icon:focus,
.mobile-menu-btn:focus,
.mobile-menu-close:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.game-item:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

/* Tablet and below */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-md);
        height: 72px;
    }

    .nav-right {
        gap: var(--spacing-md);
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .game-category {
        padding: var(--spacing-3xl) var(--spacing-md);
        min-height: 550px;
    }

    .category-content h2 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-3xl);
    }

    .games-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-lg);
    }

    .game-item img {
        width: 220px;
        height: 220px;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .game-category {
        padding: var(--spacing-3xl) var(--spacing-md);
        min-height: 500px;
    }

    .category-content h2 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-2xl);
    }

    .games-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: var(--spacing-md);
    }

    .game-item img {
        width: 180px;
        height: 180px;
    }

    .search-modal-content {
        width: 95%;
        max-width: 400px;
    }

    .search-modal-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .search-modal-header h2 {
        font-size: var(--font-size-xl);
    }

    .search-modal-body {
        padding: var(--spacing-lg);
    }

    .search-input-wrapper {
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-lg);
    }

    .search-input-wrapper input {
        width: 100%;
    }

    .search-submit-btn {
        width: 100%;
        padding: var(--spacing-md);
    }

    .search-suggestions {
        margin-top: var(--spacing-md);
    }

    .search-suggestions h3 {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-sm);
    }

    .suggestion-tags {
        gap: var(--spacing-xs);
    }

    .suggestion-tag {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */

@media print {
    .header,
    .footer {
        display: none;
    }

    .main-content {
        margin-top: 0;
    }

    .game-item {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #e2e8f0;
    }
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

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

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

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}