/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #1a1a1a;
    --card-bg: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-muted: #888888;
    --accent-color: #ff6b35;
    --accent-hover: #ff5722;
    --border-color: #333333;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light theme variables */
[data-theme="light"] {
    --primary-bg: #ffffff;
    --secondary-bg: #f5f5f5;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #666666;
    --accent-color: #ff6b35;
    --accent-hover: #ff5722;
    --border-color: #e0e0e0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--primary-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.header-top {
    background: var(--primary-bg);
    padding: 0.75rem 0;
}

.header-top-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-spacer {
    width: 120px; /* Same width as controls for centering */
}

.logo {
    text-align: center;
    flex: 1;
}

.logo h1 a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-nav {
    padding: 1rem 0;
    background: var(--secondary-bg);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.nav-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
    border-radius: 10px;
    transition: var(--transition);
    cursor: pointer;
    display: block;
    white-space: nowrap;
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 107, 53, 0.3);
    transform: translateY(-1px);
}

.nav-link.active {
    color: var(--text-primary);
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

/* Language switcher styles */
.language-switcher {
    display: flex;
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2px;
    border: 1px solid var(--border-color);
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 18px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn.active {
    background: var(--accent-color);
    color: white;
}

.lang-btn:hover:not(.active) {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* Theme switcher styles */
.theme-switcher {
    display: flex;
}

.theme-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    transform: scale(1.1);
}

.theme-icon {
    font-size: 1.2rem;
}

/* Filter controls styles */
.filter-controls {
    margin: 1.5rem 0;
    display: flex;
    justify-content: center;
}

.filter-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.filter-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-color);
    background-color: rgba(255, 107, 53, 0.1);
}

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

.filter-btn.active:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

/* Main content */
.main {
    margin-top: 220px;
    min-height: calc(100vh - 220px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Page management */
.page {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.page.active {
    display: block;
}

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

/* Hero section */
.hero {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.1) 0%, rgba(255, 107, 53, 0.05) 100%);
    border-radius: 20px;
    margin: 2rem 0;
}

.hero h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Systems grid */
.systems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.system-card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.system-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow);
    border-color: var(--accent-color);
}

.system-image {
    height: 200px;
    overflow: hidden;
    background: var(--secondary-bg);
}

.system-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.system-card:hover .system-image img {
    transform: scale(1.05);
}

.system-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 1.5rem 0.5rem;
}

.system-card p {
    color: var(--text-secondary);
    margin: 0 1.5rem 1.5rem;
    font-size: 0.95rem;
}

/* Games page */
.page-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 2rem 0;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    gap: 1rem;
}

.page-header-top {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
}

.page-title-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
}

.games-count {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.games-count #games-total {
    font-weight: 700;
    color: var(--accent-color);
}


.sort-controls {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
}

.sort-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sort-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.sort-group select {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    min-width: 180px;
}

.sort-group select:hover {
    border-color: var(--accent-color);
}

.sort-group select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(255, 107, 53, 0.2);
}

.filters span {
    background: var(--card-bg);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* Games grid */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.game-card {
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    position: relative;
}

.game-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--accent-color);
}

.game-cover {
    aspect-ratio: 3/4;
    overflow: hidden;
    background: var(--secondary-bg);
    position: relative;
}

.game-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.game-card:hover .game-cover img {
    transform: scale(1.05);
}

.game-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.8);
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.game-status.new-games {
    background: rgba(76, 175, 80, 0.9);
    color: white;
}

.game-status.ports {
    background: rgba(33, 150, 243, 0.9);
    color: white;
}

.game-status.re-releases {
    background: rgba(156, 39, 176, 0.9);
    color: white;
}

.game-status.in-development {
    background: rgba(255, 193, 7, 0.9);
    color: var(--primary-bg);
}

.game-status.demos-prototypes {
    background: rgba(255, 87, 34, 0.9);
    color: white;
}

.game-status.free {
    background: rgba(76, 175, 80, 0.9);
    color: white;
    border: 2px solid rgba(76, 175, 80, 1);
}

.game-info {
    padding: 1.5rem;
}

.game-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.game-developer {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.game-year {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.buy-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent-color);
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    width: 100%;
    justify-content: center;
}

.buy-button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.buy-button.unavailable {
    background: var(--text-muted);
    cursor: not-allowed;
}

.buy-button.unavailable:hover {
    background: var(--text-muted);
    transform: none;
}

.download-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #4caf50;
    color: white;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    width: 100%;
    justify-content: center;
    border: 2px solid #4caf50;
}

.download-button:hover {
    background: #45a049;
    border-color: #45a049;
    transform: translateY(-1px);
}

.download-button::before {
    content: "⬇";
    font-size: 1rem;
}

/* Loading states */
.loading, .no-more-games {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.hidden {
    display: none !important;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Footer */
.footer {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive design */
@media (max-width: 768px) {
    .header-top {
        padding: 0.5rem 0;
    }

    .header-top-container {
        padding: 0 1rem;
    }

    .header-spacer {
        width: 80px;
    }

    .lang-btn {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
    }

    .theme-btn {
        width: 35px;
        height: 35px;
    }

    .theme-icon {
        font-size: 1rem;
    }

    .logo h1 a {
        font-size: 1.4rem;
    }

    .header-nav {
        padding: 0.75rem 0;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .nav-row {
        gap: 0.75rem;
        justify-content: center;
    }
    
    .filter-buttons {
        gap: 0.25rem;
    }
    
    .filter-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.8rem;
    }

    .nav-link {
        font-size: 0.85rem;
        padding: 0.5rem 1rem;
    }

    .container {
        padding: 0 1rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .systems-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .page-header-top {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        width: 100%;
    }

    .sort-controls {
        width: 100%;
    }

    .sort-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .sort-group select {
        width: 100%;
        min-width: auto;
    }

    .main {
        margin-top: 260px;
    }
}

@media (max-width: 480px) {
    .games-grid {
        grid-template-columns: 1fr;
    }

    .nav-row {
        gap: 0.75rem;
    }

    .nav-link {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }

    .logo h1 a {
        font-size: 1.2rem;
    }

    .main {
        margin-top: 280px;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection styles */
::selection {
    background: var(--accent-color);
    color: white;
}

/* Focus styles for accessibility */
.nav-link:focus,
.dropdown-link:focus,
.buy-button:focus,
.system-card:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}