:root {
    --color-dark: #0f0f0f;
    --color-darker: #0a0a0a;
    --color-light: #f0f0f0;
    --color-primary: #FF477E;
    --color-secondary: #FF85A1;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    --shadow-glow: 0 8px 32px rgba(255, 71, 126, 0.15);
    --shadow-hover: 0 10px 40px rgba(255, 71, 126, 0.25);
    
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --container-max: 1280px;
}

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

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

body {
    font-family: var(--font-family);
    background-color: var(--color-dark);
    color: var(--color-light);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    transition: all var(--transition-base);
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}



.gradient-pink {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card-glow {
    box-shadow: var(--shadow-glow);
}

@media (max-width: 768px) {
    .hidden-mobile {
        display: none;
    }
}

@media (min-width: 769px) {
    .hidden-desktop {
        display: none;
    }
}

header {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow-glow);
    border-bottom: 1px solid var(--color-gray-800);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
    flex-wrap: wrap;
}

header .brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

header .brand i {
    color: var(--color-primary);
    font-size: 1.5rem;
}

header .brand h1 {
    font-size: 1.25rem;
    font-weight: 700;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5em;
}

header nav {
    display: none;
    gap: var(--spacing-lg);
    align-items: center;
}

@media (min-width: 768px) {
    header nav {
        display: flex;
    }
    
    .header-actions {
        gap: var(--spacing-lg);
    }
}

header nav a,
header nav button {
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

header nav a:hover,
header nav button:hover {
    color: var(--color-primary);
}

header nav button.active {
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

@media (max-width: 768px) {
    header .container {
        flex-wrap: nowrap;
        justify-content: space-between;
    }
    
    header .brand {
        flex: 0 0 auto;
    }
    
    header nav {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
    }
    
    header nav a {
        display: none;
    }
    
    header nav button {
        display: block;
        padding: var(--spacing-xs);
    }
    
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        color: var(--color-light);
        font-size: 1.5rem;
    }
}

@media (min-width: 769px) {
    .mobile-menu-btn {
        display: none;
    }
}

.mobile-menu {
    display: none;
    background-color: var(--color-darker);
    border-top: 1px solid var(--color-gray-800);
}

.mobile-menu.active {
    display: block;
}

.hidden {
    display: none !important;
}

.mobile-menu .container {
    padding: var(--spacing-md);
}

.mobile-menu a {
    display: block;
    padding: var(--spacing-sm) 0;
    font-weight: 500;
}

main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

.hero-section {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-section h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.hero-section p {
    color: var(--color-gray-300);
    font-size: 1.125rem;
    max-width: 48rem;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.8;
}

.hero-btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    font-weight: 500;
    transition: all var(--transition-base);
}

.hero-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

.game-card {
    max-width: 42rem;
    margin: 0 auto var(--spacing-2xl);
    background-color: var(--color-darker);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-glow);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-gray-800);
}

@media (min-width: 768px) {
    .game-card {
        padding: var(--spacing-xl);
    }
}

.game-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.mode-selector,
.level-selector {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.mode-btn,
.level-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-full);
    background-color: var(--color-gray-700);
    color: var(--color-light);
    font-weight: 500;
    transition: all var(--transition-base);
}

.mode-btn:hover,
.level-btn:hover {
    background-color: rgba(255, 71, 126, 0.2);
    color: var(--color-primary);
}

.mode-btn.active,
.level-btn.active {
    background-color: var(--color-primary);
    color: white;
}

.question-card {
    background-color: var(--color-dark);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    min-height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-gray-800);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.question-card p {
    font-size: 1.25rem;
    text-align: center;
    line-height: 1.8;
}

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.generate-btn,
.clear-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 700;
    transition: all var(--transition-base);
}

.generate-btn {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
}

.generate-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-hover);
}

.clear-btn {
    background-color: var(--color-gray-700);
    color: var(--color-light);
}

.clear-btn:hover {
    background-color: var(--color-gray-600);
}

.history-section {
    margin-top: var(--spacing-lg);
}

.history-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-sm);
}

.history-list {
    max-height: 120px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--color-gray-300);
}

.history-list::-webkit-scrollbar {
    width: 6px;
}

.history-list::-webkit-scrollbar-track {
    background: var(--color-gray-800);
    border-radius: var(--radius-sm);
}

.history-list::-webkit-scrollbar-thumb {
    background: var(--color-gray-600);
    border-radius: var(--radius-sm);
}

.history-list::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

.guide-section {
    max-width: 56rem;
    margin: 0 auto var(--spacing-2xl);
}

.guide-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.guide-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .guide-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.guide-card {
    background-color: var(--color-darker);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glow);
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-800);
}

.guide-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.guide-card p {
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.guide-card .usage {
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

.rule-section {
    background-color: var(--color-darker);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glow);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    border: 1px solid var(--color-gray-800);
}

@media (min-width: 768px) {
    .rule-section {
        padding: var(--spacing-lg);
    }
}

.rule-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.rule-section p {
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.rule-section strong {
    color: var(--color-light);
    font-weight: 600;
}

.details-section {
    max-width: 56rem;
    margin: 0 auto var(--spacing-2xl);
    background-color: var(--color-darker);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glow);
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-800);
}

@media (min-width: 768px) {
    .details-section {
        padding: var(--spacing-lg);
    }
}

.details-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.details-section p {
    color: var(--color-gray-300);
    font-size: 0.875rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

footer {
    background-color: var(--color-darker);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-gray-800);
}

footer .container {
    text-align: center;
}

footer .brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

footer .brand i {
    color: var(--color-primary);
    font-size: 1.25rem;
}

footer .brand h2 {
    font-size: 1.25rem;
    font-weight: 700;
}

footer p {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-md);
}

footer .links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

footer .links a {
    color: var(--color-gray-400);
    transition: color var(--transition-base);
}

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

footer .disclaimer {
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.ad-container {
    width: 100%;
    height: 250px;
    background-color: var(--color-darker);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-xl);
    border: 1px solid var(--color-gray-800);
}

.ad-box {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-label {
    color: var(--color-gray-500);
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
    padding-bottom: var(--spacing-sm);
}

.content-section {
    max-width: 56rem;
    margin: 0 auto;
    background-color: var(--color-darker);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-glow);
    padding: var(--spacing-md);
    border: 1px solid var(--color-gray-800);
}

@media (min-width: 768px) {
    .content-section {
        padding: var(--spacing-lg);
    }
}

.content-section h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.content-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.content-section p {
    color: var(--color-gray-300);
    font-size: 0.875rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.content-section .updated {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 1.5rem;
        --spacing-2xl: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .game-card,
    .guide-section,
    .details-section,
    .content-section {
        padding: var(--spacing-md);
    }
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-800);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-600);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

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

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.mb-4 {
    margin-bottom: var(--spacing-md);
}

.mb-8 {
    margin-bottom: var(--spacing-xl);
}

.p-4 {
    padding: var(--spacing-md);
}

.rounded {
    border-radius: var(--radius-md);
}

.border {
    border: 1px solid var(--color-gray-800);
}