/**
 * Main Stylesheet
 * 
 * This file contains the main styles for the FiddleBops website.
 * CSS variables are imported from src/styles/variables.css
 */

/* Import CSS Variables */
@import url('/styles/variables.css');

/* ===========================================
 * BASE STYLES
 * =========================================== */
body {
    font-family: var(--font-family-primary);
    margin: 0;
    padding: 0;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    overflow-x: hidden;
    /* Safe area support for notch devices */
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
}

/* P0: 防止移动端意外下拉刷新 */
html {
    overscroll-behavior: contain;
}

/* ===========================================
 * CLS & PERFORMANCE OPTIMIZATIONS
 * =========================================== */

/* Reserve space for game iframe to prevent CLS */
.game-iframe-sprunki {
    contain: layout style;
    min-height: 300px;
}

/* Reserve space for video container */
.video-container {
    contain: layout style;
    min-height: 200px;
}

/* Use content-visibility for below-the-fold sections */
.about,
.faq-section,
.game-video,
.trending-section,
.sound-explorer-section {
    content-visibility: auto;
    contain-intrinsic-size: auto 500px;
}

/* Lock background scroll when mobile nav overlay is open */
body.nav-open {
    overflow: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

a {
   text-decoration: none;
   color: var(--color-link);
}

a:hover {
    color: var(--color-link-hover);
}

/* Headings use display font */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-display);
    color: var(--color-text-primary);
    line-height: 1.2;
}

/* Section titles with accent underline */
.section-title,
.games h2,
.about h2,
.related-games h2,
.game-page-title {
    position: relative;
    display: inline-block;
    width: 100%;
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.section-title::after,
.games h2::after,
.about h2::after,
.related-games h2::after,
.game-page-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: 2px;
    box-shadow: 0 0 10px var(--glow-color-50);
}

/* ===========================================
 * HEADER
 * =========================================== */
header {
    /* Fallback for browsers without backdrop-filter support */
    background-color: rgba(10, 10, 10, 0.95);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-index-nav);
    border-bottom: 1px solid var(--color-border);
}

/* Progressive enhancement: use backdrop-filter if supported */
@supports (backdrop-filter: blur(10px)) or (-webkit-backdrop-filter: blur(10px)) {
    header {
        background-color: rgba(10, 10, 10, 0.85);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }
}

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

header .logo h1 {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-white);
    display: flex;
    align-items: center;
    gap: 4px;
}

header .logo h1 a:hover {
    color: var(--color-link);
}

header .logo h1 .light {
    font-weight: var(--font-weight-normal);
    color: var(--color-primary);
}

header nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: var(--spacing-xl);
}

header nav ul li {
    margin-left: 0;
}

header nav ul li a {
    color: var(--color-text-white);
    font-weight: var(--font-weight-normal);
    transition: color var(--transition-normal);
    display: block;
    position: relative;
}

header nav ul li a:hover {
    color: var(--color-primary);
}

/* P2: 导航活动状态指示器 */
header nav ul li a.active,
header nav ul li a[aria-current="page"] {
    color: var(--color-primary);
}

header nav ul li a.active::after,
header nav ul li a[aria-current="page"]::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    box-shadow: 0 0 10px var(--glow-color-50);
    border-radius: 1px;
}

/* Navigation Toggle Button */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text-white);
    /* P0: 确保触摸目标 >= 44px */
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

.nav-toggle:focus {
    outline: none;
}

/* P0: Nav toggle SVG 图标切换 */
.nav-toggle .nav-icon-close {
    display: none;
}

.nav-menu.active ~ .nav-toggle .nav-icon-open,
.nav-toggle.is-active .nav-icon-open {
    display: none;
}

.nav-menu.active ~ .nav-toggle .nav-icon-close,
.nav-toggle.is-active .nav-icon-close {
    display: block;
}

.nav-menu {
    display: block;
}

/* Header language selector - Custom styled dropdown
 * Note: Using SVG data URI for dropdown arrow as <select> doesn't support ::after.
 * The arrow color (#ff6b9d) matches --color-primary. Update both if theme changes.
 */
button.language-select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-color: var(--color-bg-card);
    color: var(--color-text-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-2xl) var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-family: var(--font-family-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23ff6b9d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    min-width: 100px;
}

button.language-select:hover {
    border-color: var(--color-primary);
    box-shadow: 0 0 10px var(--glow-color-20);
}

button.language-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.language-select option {
    background-color: var(--color-bg-card);
    color: var(--color-text-white);
    padding: var(--spacing-sm);
}

/* ===========================================
 * NAVIGATION DROPDOWN MENU
 * =========================================== */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    background: none;
    border: none;
    color: var(--color-text-white);
    font-weight: var(--font-weight-normal);
    font-size: inherit;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0;
    transition: color var(--transition-normal);
}

.nav-dropdown-toggle:hover {
    color: var(--color-primary);
}

/* P0: Dropdown arrow 使用 SVG 替代文字 */
.dropdown-arrow {
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.nav-dropdown.is-open .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) 0;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast), transform var(--transition-fast);
    transform: translateX(-50%) translateY(10px);
    z-index: calc(var(--z-index-nav) + 1);
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-sm);
    flex-direction: column;
    gap: 0;
}

.nav-dropdown.is-open .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu li {
    margin: 0;
}

.nav-dropdown-menu li a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    white-space: nowrap;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-dropdown-menu li a:hover {
    background-color: rgba(255, 107, 157, 0.1);
    color: var(--color-primary);
}

/* Language Switcher specific dropdown positioning
 * Note: this <ul> sits outside <nav>, so it isn't covered by the
 * `header nav ul` list-style reset — reset it locally.
 * Width matches the toggle button so menu items align with the button label.
 */
.language-dropdown-menu {
    left: auto;
    right: 0;
    transform: translateY(10px);
    min-width: 100%;
    list-style: none;
}

.nav-dropdown.is-open .language-dropdown-menu {
    transform: translateY(0);
}

.language-dropdown-menu li a {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

/* ===========================================
 * PAGE SECTIONS (PRIVACY / TERMS / 404)
 * =========================================== */
.tab-content {
    background-color: var(--color-bg-card, #fcfcfc);
    padding: var(--spacing-2xl, 30px) var(--spacing-xl, 20px);
    border-radius: var(--radius-xl, 15px);
    margin-bottom: var(--spacing-xl, 20px);
}

.error-404 .tab-content {
    padding: var(--spacing-4xl, 80px) var(--spacing-xl, 20px);
}

.page .title {
    color: var(--color-text-white, #fff);
}

/* ===========================================
 * HERO SECTION
 * =========================================== */
.hero {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

/* Game page H1 title - additional styles */
.game-page-title {
    text-align: center;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-white);
    margin: 0 0 var(--spacing-xl) 0;
    flex: 0 0 100%;
}

/* Subtle gradient glow behind hero */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 300px;
    background: radial-gradient(ellipse at center, rgba(255, 107, 157, 0.15) 0%, transparent 70%);
    pointer-events: none;
    z-index: -1;
}

.hero .container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===========================================
 * GAME CARD
 * =========================================== */
.game-card {
    background-color: var(--color-bg-card);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    border-radius: var(--radius-xl);
    text-align: center;
    width: 100%;
    margin: 0 auto;
    gap: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    /* 修复: 使用 border-box 确保 padding/border 包含在 width 内 */
    box-sizing: border-box;
}

/* Top glow line on game card */
.game-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

.game-card .game-image-container {
    position: relative;
    width: 100%;
    margin-bottom: 0;
    height: 600px;
    background-color: var(--color-bg-card);
    background-image: url(/WX20250207-111857.jpg);
    background-repeat: no-repeat;
    background-position: center center;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background-size: 100%;
}

.game .game-l-2 img {
    width: 100% !important;
    height: 100% !important;
    margin: 0 auto;
}

/* Sidebar styles - SEE homepage.css for glassmorphism card styles */
/* Base resets only, visual styles in homepage.css */

.game-card .game-image {
    text-align: left;
    width: 100%;
}

.game-card .game-info {
    text-align: center;
    width: 100%;
}

.game-card h2 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

.game-card p {
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-muted);
    font-weight: var(--font-weight-light);
}

/* ===========================================
 * BUTTONS
 * =========================================== */
.play-button {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-lg);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glow-sm);
}

.play-button:hover {
    background-color: var(--color-primary-light);
    box-shadow: var(--shadow-glow-md);
    transform: translateY(-2px);
}

/* iframe overlay button */
.game-card .overlay-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: orangered;
    color: var(--color-text-white);
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    z-index: var(--z-index-overlay);
    transition: background-color var(--transition-normal);
}

.game-card .overlay-button:hover {
    background-color: var(--color-overlay-dark);
}

/* ===========================================
 * GAMES SECTION
 * =========================================== */
.games {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-light);
    margin: var(--spacing-3xl) 0;
    border-radius: var(--radius-xl);
}

.games h2 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-2xl);
    color: var(--color-text-light);
}

.game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(var(--grid-min-card), 1fr));
    gap: var(--grid-gap);
    text-align: center;
}

.game {
    background-color: var(--color-bg-card);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    /* Prevent grid blowout on mobile */
    min-width: 0;
    overflow: hidden;
    /* P1: 所有卡片都是可点击的 */
    cursor: pointer;
}

/* P1: 增强的游戏卡片 Hover 效果 - 更强的光晕和微缩放 */
.game:hover {
    border-color: var(--color-primary);
    box-shadow:
        0 0 30px rgba(255, 107, 157, 0.4),
        0 0 60px rgba(255, 107, 157, 0.15),
        0 12px 40px rgba(0, 0, 0, 0.4);
    transform: translateY(-8px) scale(1.02);
}

/* P1: Hover 时图片亮度提升 */
.game:hover img {
    filter: brightness(1.1) contrast(1.05);
}

/* P1: Hover 时标题颜色变化 */
.game:hover .game__title--ellipsis,
.game:hover p {
    color: var(--color-primary);
}

.game .game-logo img {
    width: 100px;
    height: 100px;
    display: block;
    margin: 0 auto;
}

.game button {
    background-color: var(--color-success);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-md);
    transition: background-color var(--transition-normal);
}

.game button:hover {
    background-color: var(--color-success-dark);
}

/* ===========================================
 * PAGINATION
 * =========================================== */
.pagination {
    width: 100%;
    text-align: center;
    padding: var(--spacing-sm);
    margin: var(--spacing-2xl) 0;
}

.pagination .current {
    display: inline-block;
    min-width: 40px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin: var(--spacing-xs);
    background: var(--color-text-muted);
    color: var(--color-text-white);
    border: 1px solid var(--color-text-muted);
}

.pagination a {
    display: inline-block;
    min-width: 40px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin: var(--spacing-xs);
    background: var(--color-bg-white);
    color: var(--color-text-dark);
    border: 1px solid var(--color-text-dark);
    text-decoration: none;
}

/* ===========================================
 * ABOUT SECTION
 * =========================================== */
.about {
    padding: var(--spacing-3xl) 0;
    margin-top: var(--spacing-2xl);
}

.about h2 {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    font-size: var(--font-size-2xl);
    color: var(--color-text-primary);
}

.about-content {
    background-color: var(--color-bg-card);
    padding: var(--spacing-2xl);
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-xl);
}

.about-content h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

.about-content h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

.about-content ul {
    padding-left: var(--spacing-xl);
}

.about-content ul li {
    margin-bottom: var(--spacing-xs);
}

.about-content > p {
    margin-bottom: var(--spacing-lg);
}

.about-content hr {
    border: 0;
    border-top: 1px solid var(--color-border-light);
    margin: var(--spacing-xl) 0;
}

/* ===========================================
 * COMMUNITY SECTION
 * =========================================== */
.community {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background-color: var(--color-bg-white);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-xl);
}

.community h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-dark);
}

.community p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
}

.join-community-button {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-lg);
    transition: background-color var(--transition-normal);
}

.join-community-button:hover {
    background-color: var(--color-primary-dark);
}

/* ===========================================
 * RELATED GAMES SECTION
 * =========================================== */
.related-games {
    padding: var(--spacing-2xl) 0;
}

.related-games h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-2xl);
    color: var(--color-text-dark);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(var(--grid-min-related), 1fr));
    gap: var(--grid-gap);
}

.related-grid .game {
    background-color: var(--color-bg-white);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
}

.related-grid .game .game-logo {
    margin-bottom: var(--spacing-md);
}

.related-grid .game .game-logo img {
    width: 100px;
    height: 100px;
}

.related-grid button {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-md);
    transition: background-color var(--transition-normal);
}

.related-grid button:hover {
    background-color: var(--color-primary-dark);
}

/* Explore/More link container */
.more {
    text-align: center;
    margin-top: var(--spacing-2xl);
}

.more a {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text-white);
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glow-sm);
}

.more a:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-md);
    color: var(--color-text-white);
}

.more a::after {
    content: '→';
    transition: transform var(--transition-fast);
}

.more a:hover::after {
    transform: translateX(4px);
}

.more-games {
    background-color: var(--color-accent-red);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--radius-lg);
    display: block;
    margin: var(--spacing-xl) auto;
    transition: background-color var(--transition-normal);
}

.more-games:hover {
    background-color: var(--color-accent-red-dark);
}

/* ===========================================
 * COMMENTS SECTION
 * =========================================== */
.comments {
    padding: var(--spacing-2xl) 0;
}

.comments h2 {
    text-align: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-dark);
}

.comments .comment {
    background-color: var(--color-bg-white);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.comments .comment .author {
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-dark);
}

.comments .comment .time {
    font-style: italic;
    margin-left: var(--spacing-xs);
    color: var(--color-text-muted);
}

.comments .comment .actions {
    display: flex;
    align-items: center;
    margin-top: var(--spacing-xs);
}

.comments .comment .actions a {
    margin-right: var(--spacing-md);
    color: var(--color-primary);
}

.comments .comment .actions img {
    width: 15px;
    height: 15px;
    margin-left: var(--spacing-xs);
}

.comments .add-comment {
    background-color: var(--color-bg-white);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-lg);
}

.comments .add-comment input[type="text"],
.comments .add-comment input[type="email"] {
    width: calc(100% - 22px);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-sizing: border-box;
}

.comments .add-comment input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

/* ===========================================
 * FOOTER
 * =========================================== */
footer {
    background-color: var(--color-bg-dark);
    color: var(--color-text-muted);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

footer nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
}

footer nav ul li {
    margin-right: var(--spacing-md);
}

footer nav ul li a {
    color: var(--color-text-white);
    transition: color var(--transition-normal);
}

footer nav ul li a:hover {
    color: var(--color-link-footer-hover);
}

footer .copyright {
    margin-top: var(--spacing-md);
}

/* ===========================================
 * RESPONSIVE STYLES
 * =========================================== */
@media (max-width: 768px) {
    header .container {
        flex-direction: row;
    }
    
    header .nav-menu {
        position: fixed;
        top: 70px; /* Start below header */
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--color-nav-overlay);
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        padding-top: var(--spacing-2xl);
        align-items: center;
        opacity: 0;
        visibility: hidden;
        /* 修复: 隐藏时禁用事件，避免阻挡 footer 点击 */
        pointer-events: none;
        transition: opacity var(--transition-normal), visibility var(--transition-normal);
        z-index: var(--z-index-nav);
        margin-top: 0;
    }
    
    header .nav-menu ul {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xl);
    }
    
    header .nav-menu ul li {
        margin: 0;
    }
    
    header .nav-toggle {
        display: block;
        z-index: var(--z-index-nav-toggle);
        position: relative;
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        /* 激活时恢复事件响应 */
        pointer-events: auto;
    }

    /* Mobile dropdown styles */
    .nav-dropdown-menu {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: var(--spacing-sm) 0;
        min-width: auto;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
    }

    .nav-dropdown.is-open .nav-dropdown-menu {
        max-height: 200px;
        transform: none;
    }

    .nav-dropdown-menu li a {
        padding: var(--spacing-xs) var(--spacing-lg);
        font-size: var(--font-size-sm);
        color: var(--color-text-muted);
    }

    .nav-dropdown-menu li a:hover {
        background: transparent;
    }

    .related-grid {
        grid-template-columns: repeat(auto-fit, minmax(var(--grid-min-related-sm), 1fr));
    }
    
    .game-grid {
        grid-template-columns: repeat(auto-fit, minmax(var(--grid-min-card-sm), 1fr));
    }
    
    .comments .add-comment input[type="text"],
    .comments .add-comment input[type="email"] {
        width: calc(100% - 10px);
    }
    
    .game-card {
        flex-direction: column;
        max-width: 100%;
        text-align: center;
    }
    
    .game-card .game-image {
        text-align: center;
        max-width: 100% !important;
    }
    
    .game-card .game-info {
        text-align: center;
    }
}

/* Extra-small phones: force <= 2 columns so cards stay tappable */
@media (max-width: 480px) {
    .game-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .related-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ===========================================
 * MUSIC ICONS
 * =========================================== */
.game-grid .game p::before {
    display: inline-block;
    margin-right: var(--spacing-xs);
    font-size: var(--font-size-xs);
    font-family: var(--font-family-icons);
    font-weight: var(--font-weight-icon);
    color: var(--color-text-gray);
}

/* ===========================================
 * 404 ERROR PAGE
 * =========================================== */
.error-404 {
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.error-404 h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-dark);
}

.error-404 p {
    margin-bottom: var(--spacing-2xl);
    color: var(--color-text-muted);
    font-weight: var(--font-weight-light);
}

.error-404 a {
    background-color: var(--color-secondary);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-lg);
    display: inline-block;
    transition: background-color var(--transition-normal);
}

.error-404 a:hover {
    background-color: var(--color-secondary-dark);
}

/* ===========================================
 * IFRAME CONTAINER
 * =========================================== */
.responsive-iframe-container {
    position: relative;
    overflow: hidden;
    padding-top: 56.25%; /* 16:9 aspect ratio */
}

.responsive-iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
    background-color: black;
}

#fullscreenButton {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background-color: var(--color-overlay-button);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    cursor: pointer;
    z-index: var(--z-index-overlay);
    font-size: var(--font-size-md);
    border-radius: var(--radius-sm);
}

#playButton {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--color-primary);
    color: var(--color-text-white);
    border: none;
    padding: var(--spacing-xl) 40px;
    text-align: center;
    text-decoration: none;
    font-size: 18px;
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    z-index: var(--z-index-button);
    border-radius: 50px;
    box-shadow: var(--shadow-glow-sm);
    transition: all var(--transition-normal);
}

/* Base hover - enhanced in homepage.css for game page context */
#playButton:hover {
    background-color: var(--color-primary-light);
    transform: translate(-50%, -50%) scale(1.08);
}

/* ===========================================
 * GAME IFRAME VISIBILITY
 * - Hide the empty iframe before Play is clicked so the cover/background is visible.
 * - Once playing, show iframe by toggling `.is-playing` on the container.
 * =========================================== */
/* ===========================================
 * GAME IFRAME - 16:9 + SAFE AREA DESIGN
 * Core game elements in center 80% area
 * =========================================== */
.game-iframe-sprunki iframe {
    display: none;
    width: 100%;
    height: 100%;
    border: none;
    aspect-ratio: var(--aspect-ratio-game, 16/9);
    /* Safe area: game content in center 80% */
    box-sizing: border-box;
}

.game-iframe-sprunki.is-playing iframe {
    display: block;
    /* When playing, fill the container */
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

/* Safe area wrapper for game content - center 80% */
.game-iframe-sprunki::after {
    content: '';
    position: absolute;
    top: var(--game-safe-padding, 10%);
    left: var(--game-safe-padding, 10%);
    right: var(--game-safe-padding, 10%);
    bottom: var(--game-safe-padding, 10%);
    border: 2px dashed rgba(255, 107, 157, 0.1);
    border-radius: var(--radius-lg, 16px);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

/* Show safe area guide on hover (dev/debug) */
.game-iframe-sprunki:hover::after {
    opacity: 0; /* Set to 1 for debug */
}

/* Fullscreen mode - account for device safe areas */
.game-iframe-sprunki:-webkit-full-screen,
.game-iframe-sprunki:fullscreen {
    padding: 
        max(env(safe-area-inset-top, 0px), var(--game-safe-padding, 5%))
        max(env(safe-area-inset-right, 0px), var(--game-safe-padding, 5%))
        max(env(safe-area-inset-bottom, 0px), var(--game-safe-padding, 5%))
        max(env(safe-area-inset-left, 0px), var(--game-safe-padding, 5%));
    background: #000;
}

.game-iframe-sprunki:-webkit-full-screen iframe,
.game-iframe-sprunki:fullscreen iframe {
    border-radius: var(--radius-lg, 16px);
}

/* ===========================================
 * GAME THUMBNAILS
 * =========================================== */
/* Sidebar thumbnail styles - SEE homepage.css for glassmorphism styles */

.game-logo img {
    width: 100%;
    aspect-ratio: var(--aspect-ratio-video);
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.game-logo {
    background-color: var(--color-bg-dark);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.game a {
    display: block;
    text-decoration: none;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border-radius: var(--radius-lg);
    /* P0: 确保触摸目标足够大 */
    min-height: 44px;
    min-width: 44px;
}

.game a:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    color: var(--color-text-white);
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
    padding: var(--spacing-sm);
}

.game a:hover .game-overlay {
    opacity: 1;
}

.game-overlay p {
    margin: 0;
    font-size: var(--font-size-sm);
}

/* ===========================================
 * CATEGORY GRID
 * =========================================== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--grid-gap);
}

.category-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    aspect-ratio: var(--aspect-ratio-video);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    /* P1: 分类卡片可点击 */
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    box-shadow:
        0 0 20px var(--glow-color-25),
        0 8px 24px rgba(0, 0, 0, 0.3);
    background: rgba(255, 107, 157, 0.05);
}

.category-card-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.category-card i {
    font-size: 30px;
    color: var(--color-text-gray);
}

.category-card span {
    font-size: 20px;
    color: var(--color-text-dark);
    text-transform: capitalize;
}

.category-card:hover span {
    color: var(--color-primary-darker);
}

/* Responsive: keep consistent with site breakpoints */
@media screen and (max-width: 1200px) {
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media screen and (max-width: 980px) {
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media screen and (max-width: 768px) {
    /* 移动端分类：紧凑网格布局，一次性展示所有分类 */
    /* 移除滑动指示器，因为不需要滚动了 */
    section.categories::before,
    section.categories::after,
    .games.categories::before,
    .games.categories::after {
        display: none;
    }
    
    .category-grid {
        /* 紧凑3列网格，全部显示 */
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        padding: 0;
        margin: 0;
        overflow: visible;
    }

    .category-card {
        /* 紧凑卡片 */
        aspect-ratio: auto;
        padding: 12px 6px;
        border-radius: 10px;
        min-height: auto;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .category-card-content {
        flex-direction: column;
        gap: 4px;
        text-align: center;
        align-items: center;
    }
    
    .category-card i {
        font-size: 18px;
    }
    
    .category-card span {
        font-size: 10px;
        line-height: 1.2;
        word-break: break-word;
        max-width: 100%;
    }
    
    /* Hover 效果简化 */
    .category-card:hover {
        transform: none;
    }
}

/* ===========================================
 * ANIMATIONS (from fiddlebops-frontend)
 * =========================================== */

/* Pulse glow animation */
@keyframes pulse-glow {
    0%, 100% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.5);
        opacity: 0.6;
    }
}

/* Float animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-4px);
    }
}

/* Bounce note animation (for logo) */
@keyframes bounce-note {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-3px) rotate(-5deg);
    }
    75% {
        transform: translateY(-3px) rotate(5deg);
    }
}

/* Fade in animation */
@keyframes fade-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* P3: 卡片进入动画 - 从下方淡入 */
@keyframes cardFadeUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-pulse-glow {
    animation: pulse-glow 2s ease-in-out infinite;
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

.animate-bounce-note {
    animation: bounce-note 1.5s ease-in-out infinite;
}

.animate-fade-in {
    animation: fade-in var(--duration-slow) var(--easing-default) forwards;
}

/* P3: 游戏卡片网格进入动画 - 交错延迟 */
.game-grid .game {
    animation: cardFadeUp 0.5s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

/* 交错延迟效果 - 每个卡片延迟 50ms */
.game-grid .game:nth-child(1) { animation-delay: 0.05s; }
.game-grid .game:nth-child(2) { animation-delay: 0.1s; }
.game-grid .game:nth-child(3) { animation-delay: 0.15s; }
.game-grid .game:nth-child(4) { animation-delay: 0.2s; }
.game-grid .game:nth-child(5) { animation-delay: 0.25s; }
.game-grid .game:nth-child(6) { animation-delay: 0.3s; }
.game-grid .game:nth-child(7) { animation-delay: 0.35s; }
.game-grid .game:nth-child(8) { animation-delay: 0.4s; }
.game-grid .game:nth-child(9) { animation-delay: 0.45s; }
.game-grid .game:nth-child(10) { animation-delay: 0.5s; }
.game-grid .game:nth-child(11) { animation-delay: 0.55s; }
.game-grid .game:nth-child(12) { animation-delay: 0.6s; }
.game-grid .game:nth-child(n+13) { animation-delay: 0.65s; }

/* ===========================================
 * GLOW BADGE VARIANT
 * =========================================== */
.badge-glow {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: var(--font-size-caption);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    background-color: rgba(255, 107, 157, 0.1);
    border: 1px solid rgba(255, 107, 157, 0.5);
    color: var(--color-primary);
    transition: all var(--transition-fast);
}

.badge-glow:hover {
    background-color: rgba(255, 107, 157, 0.2);
    transform: scale(1.05);
}

/* Multi-color glow badges */
.badge-glow-cyan {
    background-color: rgba(0, 204, 255, 0.1);
    border-color: rgba(0, 204, 255, 0.5);
    color: var(--glow-cyan);
}

.badge-glow-yellow {
    background-color: rgba(255, 204, 0, 0.1);
    border-color: rgba(255, 204, 0, 0.5);
    color: var(--glow-yellow);
}

.badge-glow-green {
    background-color: rgba(102, 255, 102, 0.1);
    border-color: rgba(102, 255, 102, 0.5);
    color: var(--glow-green);
}

.badge-glow-purple {
    background-color: rgba(153, 102, 255, 0.1);
    border-color: rgba(153, 102, 255, 0.5);
    color: var(--glow-purple);
}

.badge-glow-red {
    background-color: rgba(255, 68, 68, 0.1);
    border-color: rgba(255, 68, 68, 0.5);
    color: var(--glow-red);
}

/* ===========================================
 * BUTTON MICRO-INTERACTIONS
 * =========================================== */
.btn-glow {
    background-color: var(--color-bg-card);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-glow-sm);
}

.btn-glow:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow-md);
    background-color: rgba(255, 107, 157, 0.05);
    color: var(--color-primary);
}

.btn-glow:active {
    transform: scale(0.95);
}

/* Apply active scale to all interactive buttons */
button:active,
.play-button:active,
#playButton:active {
    transform: scale(0.95);
}

#playButton:active {
    transform: translate(-50%, -50%) scale(0.95);
}

/* ===========================================
 * CARD IMAGE HOVER SCALE
 * =========================================== */
.game img,
.game-card img,
.game--mod img {
    transition: transform var(--transition-normal);
    /* Ensure images don't overflow their containers on mobile */
    max-width: 100%;
    height: auto;
}

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

/* ===========================================
 * REDUCED MOTION SUPPORT
 * =========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    /* Keep opacity transitions but remove transforms */
    .game:hover img,
    .game-card:hover img,
    .game--mod:hover img,
    .game:hover,
    button:active,
    .play-button:active,
    #playButton:active,
    .btn-glow:active {
        transform: none !important;
    }

    /* P3: 禁用卡片进入动画 */
    .game-grid .game {
        animation: none !important;
        opacity: 1 !important;
    }

    /* P3: 禁用 Featured 渐变动画 */
    .game--featured::before {
        animation: none !important;
        opacity: 0 !important;
    }
}