/* style.css */
:root {
    /* Light Theme Variables */
    --light-bg-primary: #f0f4f8;
    --light-text-color: #334e68;
    --light-header-bg: #ffffff;
    --light-header-text: #007bff;
    --light-sidebar-bg: #e9eff4;
    --light-sidebar-text: #334e68;
    --light-card-bg: #ffffff;
    --light-card-border: #dbe2ed;
    --light-tag-bg: #cfd8dc;
    --light-tag-text: #546e7a;
    --light-tag-active-bg: #007bff;
    --light-tag-active-text: #ffffff;
    --light-search-bg: #f8f9fa;
    --light-search-border: #cdd4da;
    --light-search-text: #334e68;
    --light-button-bg: #007bff;
    --light-button-text: #ffffff;
    --light-footer-bg: #34495e;
    --light-footer-text: #e0e6ed;
    --light-shadow-color: rgba(0, 0, 0, 0.08);
    --light-glow-color: rgba(0, 123, 255, 0.2);

    /* Dark Theme Variables */
    --dark-bg-primary: #1a202c;
    --dark-text-color: #e2e8f0;
    --dark-header-bg: #2d3748;
    --dark-header-text: #63b3ed; /* Light Blue */
    --dark-sidebar-bg: #2d3748;
    --dark-sidebar-text: #e2e8f0;
    --dark-card-bg: #2d3748;
    --dark-card-border: #4a5568;
    --dark-tag-bg: #4a5568;
    --dark-tag-text: #a0aec0;
    --dark-tag-active-bg: #81e6d9; /* Teal */
    --dark-tag-active-text: #2d3748;
    --dark-search-bg: #222a36;
    --dark-search-border: #63b3ed;
    --dark-search-text: #e2e8f0;
    --dark-button-bg: #81e6d9;
    --dark-button-text: #2d3748;
    --dark-footer-bg: #2d3748;
    --dark-footer-text: #63b3ed;
    --dark-shadow-color: rgba(0, 0, 0, 0.4);
    --dark-glow-color: rgba(129, 230, 217, 0.3); /* Teal glow */

    /* Current Theme Variables (default to light) */
    --current-bg: var(--light-bg-primary);
    --current-text: var(--light-text-color);
    --current-header-bg: var(--light-header-bg);
    --current-header-text: var(--light-header-text);
    --current-sidebar-bg: var(--light-sidebar-bg);
    --current-sidebar-text: var(--light-sidebar-text);
    --current-card-bg: var(--light-card-bg);
    --current-card-border: var(--light-card-border);
    --current-tag-bg: var(--light-tag-bg);
    --current-tag-text: var(--light-tag-text);
    --current-tag-active-bg: var(--light-tag-active-bg);
    --current-tag-active-text: var(--light-tag-active-text);
    --current-search-bg: var(--light-search-bg);
    --current-search-border: var(--light-search-border);
    --current-search-text: var(--light-search-text);
    --current-button-bg: var(--light-button-bg);
    --current-button-text: var(--light-button-text);
    --current-footer-bg: var(--light-footer-bg);
    --current-footer-text: var(--light-footer-text);
    --current-shadow: var(--light-shadow-color);
    --current-glow: var(--light-glow-color);
}

/* Dark Theme Activation */
body.quantum-theme-dark {
    --current-bg: var(--dark-bg-primary);
    --current-text: var(--dark-text-color);
    --current-header-bg: var(--dark-header-bg);
    --current-header-text: var(--dark-header-text);
    --current-sidebar-bg: var(--dark-sidebar-bg);
    --current-sidebar-text: var(--dark-sidebar-text);
    --current-card-bg: var(--dark-card-bg);
    --current-card-border: var(--dark-card-border);
    --current-tag-bg: var(--dark-tag-bg);
    --current-tag-text: var(--dark-tag-text);
    --current-tag-active-bg: var(--dark-tag-active-bg);
    --current-tag-active-text: var(--dark-tag-active-text);
    --current-search-bg: var(--dark-search-bg);
    --current-search-border: var(--dark-search-border);
    --current-search-text: var(--dark-search-text);
    --current-button-bg: var(--dark-button-bg);
    --current-button-text: var(--dark-button-text);
    --current-footer-bg: var(--dark-footer-bg);
    --current-footer-text: var(--dark-footer-text);
    --current-shadow: var(--dark-shadow-color);
    --current-glow: var(--dark-glow-color);
}

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

body {
    font-family: 'Rajdhani', sans-serif;
    background-color: var(--current-bg);
    color: var(--current-text);
    line-height: 1.7;
    transition: background-color 0.6s ease, color 0.6s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header - Quantum Header */
.quantum-header {
    background-color: var(--current-header-bg);
    color: var(--current-header-text);
    padding: 1.2rem 2rem;
    box-shadow: 0 4px 12px var(--current-shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--current-card-border);
    transition: background-color 0.6s ease, color 0.6s ease, box-shadow 0.6s ease, border-color 0.6s ease;
}

.header-content-wrapper {
    max-width: 1400px; /* Wider content area for header */
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.quantum-logo {
    font-family: 'Oxanium', cursive;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--current-header-text);
    text-shadow: 0 0 8px var(--current-header-text);
    transition: color 0.4s ease, text-shadow 0.4s ease;
}

.quantum-logo:hover {
    color: var(--current-tag-active-bg);
    text-shadow: 0 0 12px var(--current-tag-active-bg);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Theme Toggle Button */
.theme-toggle-button {
    background-color: var(--current-button-bg);
    color: var(--current-button-text);
    border: none;
    padding: 0.7rem 1.4rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    box-shadow: 0 2px 8px var(--current-shadow);
    transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease, transform 0.1s ease;
}

.theme-toggle-button:hover {
    background-color: var(--current-tag-active-bg);
    box-shadow: 0 0 15px var(--current-tag-active-bg);
    transform: translateY(-2px);
}

.theme-toggle-button:active {
    transform: translateY(0);
    box-shadow: 0 0 5px var(--current-tag-active-bg);
}

/* Mobile Menu Button (Hamburger) */
.mobile-menu-button {
    display: none; /* Hidden on desktop */
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001; /* Above sidebar */
}

.mobile-menu-button span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--current-header-text);
    border-radius: 2px;
    transition: all 0.3s ease-in-out;
}

.mobile-menu-button.is-active span:nth-child(1) {
    transform: translateY(11px) rotate(45deg);
}

.mobile-menu-button.is-active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-button.is-active span:nth-child(3) {
    transform: translateY(-11px) rotate(-45deg);
}

/* Main Layout Container (Grid for Desktop) */
.main-layout-container {
    flex: 1;
    display: grid;
    grid-template-columns: 280px 1fr; /* Sidebar fixed width, content takes rest */
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 2.5rem; /* Spacing below header */
}

/* Sidebar - Quantum Sidebar */
.quantum-sidebar {
    background-color: var(--current-sidebar-bg);
    color: var(--current-sidebar-text);
    padding: 2.5rem 1.5rem;
    border-right: 1px solid var(--current-card-border);
    box-shadow: 4px 0 12px var(--current-shadow);
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    transition: background-color 0.6s ease, color 0.6s ease, box-shadow 0.6s ease, border-color 0.6s ease;
}

.sidebar-heading {
    font-family: 'Oxanium', cursive;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--current-header-text);
    text-shadow: 0 0 5px var(--current-header-text);
}

.sidebar-nav-categories {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.category-link {
    padding: 0.8rem 1rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.1s ease;
    color: var(--current-sidebar-text);
}

.category-link:hover {
    background-color: var(--current-tag-bg);
    transform: translateX(5px);
    color: var(--current-tag-text);
}

.category-link.active-category {
    background-color: var(--current-tag-active-bg);
    color: var(--current-tag-active-text);
    box-shadow: 0 0 10px var(--current-tag-active-bg);
}

/* Sidebar Search Module */
.sidebar-search-module {
    display: flex;
    align-items: center;
    background-color: var(--current-search-bg);
    border: 1px solid var(--current-search-border);
    border-radius: 25px;
    padding: 0.5rem 1rem;
    box-shadow: 0 2px 8px var(--current-shadow);
    transition: background-color 0.6s ease, border-color 0.6s ease, box-shadow 0.6s ease;
}

.search-module-icon {
    font-size: 1.2rem;
    color: var(--current-search-text);
    margin-right: 0.6rem;
    transition: color 0.6s ease;
}

.search-module-field {
    flex-grow: 1;
    border: none;
    background: transparent;
    color: var(--current-search-text);
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.95rem;
    outline: none;
    padding: 0.1rem 0;
}

.search-module-field::placeholder {
    color: var(--current-search-text);
    opacity: 0.6;
}

.search-module-btn {
    background-color: var(--current-button-bg);
    color: var(--current-button-text);
    border: none;
    padding: 0.4rem 0.9rem;
    border-radius: 15px;
    cursor: pointer;
    font-family: 'Rajdhani', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    transition: background-color 0.3s ease, box-shadow 0.3s ease, transform 0.1s ease;
}

.search-module-btn:hover {
    background-color: var(--current-tag-active-bg);
    box-shadow: 0 0 10px var(--current-tag-active-bg);
    transform: scale(1.02);
}

.search-module-btn:active {
    transform: scale(1);
}

/* Main Content - Quantum Main Content */
.quantum-main-content {
    padding: 0 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

/* Intro Section */
.intro-quantum-section {
    background-color: var(--current-card-bg);
    padding: 2.5rem 3rem;
    border-radius: 10px;
    box-shadow: 0 6px 20px var(--current-shadow);
    border: 1px solid var(--current-card-border);
    transition: background-color 0.6s ease, color 0.6s ease, box-shadow 0.6s ease, border-color 0.6s ease;
}

.intro-quantum-section p {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--current-text);
}

/* Game Grid Display */
.game-grid-display {
    padding-bottom: 3rem;
}

.game-card-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2.5rem;
}

.game-item-card {
    background-color: var(--current-card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 25px var(--current-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.6s ease, border-color 0.6s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--current-card-border);
    cursor: pointer;
}

.game-item-card:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 12px 35px var(--current-glow);
    border-color: var(--current-tag-active-bg);
}

.item-card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--current-card-border);
    transition: border-color 0.6s ease;
}

.game-item-card:hover.item-card-image {
    border-color: var(--current-tag-active-bg);
}

.item-card-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.item-card-title {
    font-family: 'Oxanium', cursive;
    font-size: 1.3rem;
    margin-bottom: 0.4rem;
    color: var(--current-header-text);
    transition: color 0.4s ease;
}

.game-item-card:hover.item-card-title {
    color: var(--current-tag-active-bg);
}

.item-card-genre {
    font-size: 0.85rem;
    color: var(--current-text);
    opacity: 0.7;
    margin-bottom: 0.8rem;
}

.item-card-description {
    font-size: 0.95rem;
    color: var(--current-text);
    line-height: 1.6;
    flex-grow: 1;
}

/* Footer - Quantum Footer Base */
.quantum-footer-base {
    background-color: var(--current-footer-bg);
    color: var(--current-footer-text);
    padding: 1.8rem;
    text-align: center;
    border-top: 1px solid var(--current-card-border);
    box-shadow: 0 -4px 12px var(--current-shadow);
    transition: background-color 0.6s ease, color 0.6s ease, box-shadow 0.6s ease;
}

.footer-links-group {
    margin-bottom: 1rem;
}

.footer-nav-item {
    color: var(--current-footer-text);
    margin: 0 0.9rem;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-nav-item:hover {
    color: var(--current-tag-active-bg);
}

.copyright-text-info {
    font-size: 0.8rem;
    opacity: 0.6;
}

/* Sidebar Overlay for Mobile */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.is-visible {
    opacity: 1;
    visibility: visible;
}

/* Responsive Design - Media Queries */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
    .main-layout-container {
        grid-template-columns: 1fr; /* Single column layout for main content */
        padding-top: 1.5rem;
    }

    .quantum-sidebar {
        position: fixed;
        top: 0;
        left: -280px; /* Hidden off-screen */
        height: 100%;
        width: 280px;
        z-index: 1000;
        border-right: none;
        box-shadow: 8px 0 20px var(--current-shadow);
        transition: left 0.3s ease-in-out, background-color 0.6s ease, color 0.6s ease, box-shadow 0.6s ease;
    }

    .quantum-sidebar.is-open {
        left: 0; /* Slide in */
    }

    .mobile-menu-button {
        display: flex; /* Show hamburger on mobile */
    }

    .quantum-main-content {
        padding: 0 1.5rem;
        gap: 2rem;
    }

    .intro-quantum-section {
        padding: 2rem 2.5rem;
        margin-bottom: 2rem;
    }

    .intro-quantum-section p {
        font-size: 1rem;
    }

    .game-card-wrapper {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 2rem;
    }

    .item-card-image {
        height: 180px;
    }

    .item-card-info {
        padding: 1.2rem;
    }

    .item-card-title {
        font-size: 1.2rem;
    }

    .item-card-genre,.item-card-description {
        font-size: 0.8rem;
    }

    .quantum-footer-base {
        padding: 1.5rem;
    }
}

/* Mobile (max-width: 767px) */
@media (max-width: 767px) {
    .quantum-header {
        padding: 0.8rem 1rem;
    }

    .quantum-logo {
        font-size: 1.3rem;
    }

    .theme-toggle-button {
        padding: 0.6rem 1.1rem;
        font-size: 0.8rem;
    }

    .mobile-menu-button {
        width: 25px;
        height: 20px;
    }

    .mobile-menu-button.is-active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .mobile-menu-button.is-active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .quantum-main-content {
        padding: 0 1rem;
        gap: 1.5rem;
    }

    .intro-quantum-section {
        padding: 1.5rem 2rem;
        margin-bottom: 1.5rem;
    }

    .intro-quantum-section p {
        font-size: 0.9rem;
    }

    .game-card-wrapper {
        grid-template-columns: 1fr; /* Single column for mobile */
        gap: 1.5rem;
    }

    .item-card-image {
        height: 160px;
    }

    .item-card-info {
        padding: 1rem;
    }

    .item-card-title {
        font-size: 1.1rem;
    }

    .item-card-genre,.item-card-description {
        font-size: 0.75rem;
    }

    .quantum-footer-base {
        padding: 1.2rem;
    }

    .footer-links-group {
        flex-direction: column;
        gap: 0.5rem;
        margin-bottom: 0.8rem;
    }

    .footer-nav-item {
        margin: 0;
        font-size: 0.8rem;
    }

    .copyright-text-info {
        font-size: 0.7rem;
    }
}