/* ========================================
   Game Hub - Design System & Styles
   ======================================== */

/* CSS Variables - Design Tokens */
:root {
    /* Colors - Dark Theme */
    --color-bg-primary: #0f0f1a;
    --color-bg-secondary: #1a1a2e;
    --color-bg-tertiary: #252542;
    --color-bg-card: rgba(30, 30, 50, 0.8);
    --color-bg-glass: rgba(255, 255, 255, 0.05);

    /* Accent Colors */
    --color-primary: #6c5ce7;
    --color-primary-light: #a29bfe;
    --color-secondary: #00cec9;
    --color-accent: #fd79a8;
    --color-success: #00b894;
    --color-warning: #fdcb6e;
    --color-error: #e17055;

    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #b2bec3;
    --color-text-muted: #636e72;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-card: linear-gradient(145deg, rgba(40, 40, 70, 0.6), rgba(20, 20, 40, 0.8));
    --gradient-hero: linear-gradient(180deg, rgba(108, 92, 231, 0.1) 0%, transparent 100%);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.3);

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 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: 2rem;
    --font-size-4xl: 2.5rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Container */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background: var(--color-bg-secondary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    padding-top: env(safe-area-inset-top);
    /* Support for iOS notch */
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-icon {
    font-size: var(--font-size-2xl);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.user-area {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-email {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Language Dropdown */
.language-dropdown {
    position: relative;
}

.lang-btn {
    background: var(--color-bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    padding: var(--space-xs) var(--space-md);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-xs);
    font-weight: 700;
    transition: all var(--transition-fast);
}

.lang-btn:hover {
    background: var(--color-bg-glass);
    border-color: var(--color-primary);
}

.lang-menu {
    position: absolute;
    top: calc(100% + var(--space-sm));
    right: 0;
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    flex-direction: column;
    min-width: 140px;
    z-index: 1000;
    overflow: hidden;
}

.language-dropdown.active .lang-menu {
    display: flex;
}

.lang-menu button {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    padding: var(--space-md);
    text-align: left;
    cursor: pointer;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    transition: all var(--transition-fast);
}

.lang-menu button:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

.lang-menu button .emoji {
    font-size: 1.2rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-full);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
    background: var(--gradient-secondary);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: var(--color-text-primary);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: var(--font-size-lg);
}

.btn-full {
    width: 100%;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-primary-light);
    cursor: pointer;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    text-decoration: underline;
}

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

/* Main Content */
.main-content {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg);
    width: 100%;
}

/* Hero Section */
.hero {
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    padding: var(--space-3xl) var(--space-xl);
    margin-bottom: var(--space-2xl);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(108, 92, 231, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(253, 121, 168, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* Games Section */
.games-section {
    margin-bottom: var(--space-2xl);
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-xl);
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-xl);
}

/* Game Card */
.game-card {
    position: relative;
    /* 배지 위치 기준점 */
    background: var(--gradient-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.game-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(108, 92, 231, 0.5);
}

.game-card-image {
    position: relative;
    /* 배지 위치 기준점 */
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--color-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

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

.game-card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.game-card-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.5;
}

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

.game-card-stats {
    display: flex;
    gap: var(--space-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.game-card-stat {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}


/* Game Badge */
.game-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 60, 60, 0.9);
    color: white;
    font-size: 0.7rem;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: bold;
    z-index: 10;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Game Feature Badges (온라인, 순위) */
.game-badges {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.game-feature-badge {
    display: inline-block;
    font-size: 0.65rem;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge-online {
    background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
    color: white;
    box-shadow: 0 2px 6px rgba(0, 206, 201, 0.3);
}


/* Footer */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--space-lg);
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    padding: var(--space-lg);
    backdrop-filter: blur(5px);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    max-width: 400px;
    width: 100%;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: var(--font-size-2xl);
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.modal-close:hover {
    color: var(--color-text-primary);
}

.modal-header {
    padding: var(--space-xl) var(--space-xl) var(--space-md);
    text-align: center;
}

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

.modal-body {
    padding: var(--space-md) var(--space-xl) var(--space-xl);
}

/* Form */
.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-input {
    width: 100%;
    padding: var(--space-md);
    background: var(--color-bg-tertiary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.error-message {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
    min-height: 20px;
}

.auth-switch {
    text-align: center;
    margin-top: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        padding: var(--space-md);
    }

    .logo-text {
        font-size: var(--font-size-lg);
    }

    .user-email {
        display: none;
    }

    .hero {
        padding: var(--space-2xl) var(--space-lg);
    }

    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .main-content {
        padding: var(--space-md);
    }

    .games-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-xl);
    }

    .section-title {
        font-size: var(--font-size-xl);
    }

    .game-card-image {
        height: 150px;
    }
}

/* Touch Device Optimizations */
@media (hover: none) {
    .btn:hover {
        transform: none;
    }

    .game-card:hover {
        transform: none;
    }

    .game-card:active {
        transform: scale(0.98);
    }
}

/* Game Overlay (Iframe for PWA) */
#gameContainer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background: #0f0f1a;
    display: none !important;
    /* 기본적으로 확실히 숨김 */
    animation: fadeIn 0.3s ease;
}

#gameContainer.active {
    display: block !important;
}

#gameFrame {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Mobile App Banner */
.mobile-app-banner {
    background: linear-gradient(to right, rgba(30, 30, 50, 0.9), rgba(108, 92, 231, 0.2));
    border: 1px solid rgba(108, 92, 231, 0.4);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.banner-content {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.banner-icon {
    font-size: 1.5rem;
}

.banner-text h3 {
    font-size: var(--font-size-base);
    font-weight: 700;
    margin-bottom: 2px;
    color: var(--color-primary-light);
}

.banner-text p {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

/* PWA Modal Styles */
.pwa-body {
    text-align: center;
}

.pwa-desc {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    line-height: 1.6;
}

/* Initial Language Modal */
.initial-lang-modal {
    max-width: 500px;
    padding-bottom: var(--space-2xl);
}

.modal-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.lang-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl) !important;
}

.lang-option {
    background: var(--color-bg-tertiary);
    border: 2px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.lang-option:hover {
    background: rgba(108, 92, 231, 0.1);
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.lang-option .emoji {
    font-size: 3rem;
}

.lang-option .label {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
}

.step-list {
    text-align: left;
    background: var(--color-bg-tertiary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.step-item {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    align-items: flex-start;
}

.step-item:last-child {
    margin-bottom: 0;
}

.step-num {
    background: var(--color-primary);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: bold;
    flex-shrink: 0;
}

.step-item p {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    line-height: 1.5;
}

.ios-icon {
    display: inline-block;
    width: 20px;
    height: 20px;
    vertical-align: text-bottom;
    margin: 0 4px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Base64 for iOS Step Icons (Simplified placeholders) */
.share-icon {
    /* Symbolizing iOS share icon */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233b82f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 12v8a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2v-8'/%3E%3Cpolyline points='16 6 12 2 8 6'/%3E%3Cline x1='12' y1='2' x2='12' y2='15'/%3E%3C/svg%3E");
}

.plus-icon {
    /* Symbolizing iOS Add to Home icon */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233b82f6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='3' width='18' height='18' rx='4'/%3E%3Cline x1='12' y1='8' x2='12' y2='16'/%3E%3Cline x1='8' y1='12' x2='16' y2='12'/%3E%3C/svg%3E");
}

/* PWA App Mode Tweaks */
@media all and (display-mode: standalone) {
    body {
        /* Prevent pull-to-refresh on mobile */
        overscroll-behavior-y: none;
    }
}

/* Ensure no scroll on body when overlay is active or generally for app-feel */
body.app-mode {
    height: 100dvh;
    overflow: hidden;
}

.app-container.app-mode {
    height: 100dvh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}