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

:root {
    /* Color Palette - Bright and Vibrant for Party Game */
    --primary-color: #FF6B6B;
    --primary-dark: #FF5252;
    --secondary-color: #4ECDC4;
    --accent-color: #45B7D1;
    --warning-color: #FFA726;
    --success-color: #66BB6A;
    --purple: #AB47BC;
    --orange: #FF7043;
    --pink: #EC407A;
    --yellow: #FFCA28;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #FF6B6B 0%, #FF8E8E 100%);
    --gradient-secondary: linear-gradient(135deg, #4ECDC4 0%, #44A08D 100%);
    --gradient-accent: linear-gradient(135deg, #45B7D1 0%, #96CEB4 100%);
    --gradient-rainbow: linear-gradient(135deg, #FF6B6B 0%, #4ECDC4 25%, #45B7D1 50%, #AB47BC 75%, #FFA726 100%);
    
    /* Neutral Colors */
    --white: #FFFFFF;
    --light-gray: #F8F9FA;
    --gray: #6C757D;
    --dark-gray: #343A40;
    --black: #212529;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(253, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 107, 107, 0.1);
    z-index: 1000;
    transition: var(--transition-normal);
}

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

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    text-decoration: none;
}

.logo-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    background: linear-gradient(135deg, #6e9de3, #cfb8ee, #fecdea);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px; /* Add padding to account for fixed header */
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 2;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-text {
    color: var(--white);
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.title-main {
    display: block;
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.title-sub {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 400;
    opacity: 0.9;
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-base);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-icon {
    width: 20px;
    height: 20px;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    width: 300px;
    height: 600px;
    background: #3e4b57;
    border-radius: 30px;
    padding: 5px;
    box-shadow: var(--shadow-xl);
    transform: perspective(1000px) rotateY(-15deg) rotateX(5deg);
    transition: var(--transition-slow);
}

.phone-mockup:hover {
    transform: perspective(1000px) rotateY(-10deg) rotateX(2deg) scale(1.05);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 30px;
    overflow: hidden;
    position: relative;
}

.phone-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 30px;
}

/* Floating Elements */
.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.bubble {
    position: absolute;
    font-size: 2rem;
    animation: float 6s ease-in-out infinite;
}

.bubble-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.bubble-2 {
    top: 20%;
    right: 15%;
    animation-delay: 1.5s;
}

.bubble-3 {
    bottom: 30%;
    left: 5%;
    animation-delay: 3s;
}

.bubble-4 {
    bottom: 20%;
    right: 10%;
    animation-delay: 4.5s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
    }
}

/* Sections */
.section-title {
    text-align: center;
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-3xl);
    background: var(--gradient-rainbow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Features Section */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 107, 107, 0.1);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    display: block;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--dark-gray);
}

.feature-card p {
    color: var(--gray);
    line-height: 1.6;
}

/* Dictionaries Section */
.dictionaries {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.dictionaries-carousel {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.dictionaries-container {
    flex: 1;
    overflow: hidden;
    position: relative;
}

.dictionaries-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr); /* 3 columns × 2 pages */
    grid-template-rows: repeat(2, 1fr);
    gap: var(--spacing-2xl);
    transition: transform 0.5s ease;
    width: 200%; /* 2 pages × 100% */
}

.dictionaries-grid .dict-card {
    min-width: 0; /* Allow cards to shrink */
}

.carousel-btn {
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-normal);
    color: var(--white);
    box-shadow: var(--shadow-md);
    z-index: 2;
}

.carousel-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.carousel-btn svg {
    width: 24px;
    height: 24px;
}

.carousel-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.dict-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.dict-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.dict-card.free {
    border-color: var(--success-color);
}

.dict-card.premium {
    border-color: var(--warning-color);
}

.dict-image {
    height: 200px;
    overflow: hidden;
    position: relative;
    background: var(--light-gray);
    display: flex;
    align-items: center;
    justify-content: center;
}

.dict-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
    display: block;
}


.dict-card:hover .dict-image img {
    transform: scale(1.1);
}

.dict-info {
    padding: var(--spacing-xl);
}

.dict-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--dark-gray);
}

.dict-info p {
    color: var(--gray);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.dict-tags {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tag {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tag.easy {
    background: var(--success-color);
    color: var(--white);
}

.tag.medium {
    background: var(--warning-color);
    color: var(--white);
}

.tag.hard {
    background: var(--primary-color);
    color: var(--white);
}

.dict-price {
    font-size: var(--font-size-lg);
    font-weight: 700;
    text-align: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.dict-price.free {
    background: var(--success-color);
    color: var(--white);
}

.dict-price.premium {
    background: var(--warning-color);
    color: var(--white);
}

/* Download Section */
.download {
    padding: var(--spacing-3xl) 0;
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
}

.download-content {
    max-width: 800px;
    margin: 0 auto;
}

.download .section-title {
    color: var(--white);
    -webkit-text-fill-color: var(--white);
    margin-bottom: var(--spacing-lg);
}

.download-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
}

.download-buttons {
    margin-bottom: var(--spacing-3xl);
}

.download-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    color: var(--yellow);
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Footer */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--primary-color);
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero {
        padding-top: 120px; /* Increased padding for mobile */
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-2xl);
    }
    
    .title-main {
        font-size: var(--font-size-4xl);
    }
    
    .title-sub {
        font-size: var(--font-size-xl);
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
        padding: 6px;
        transform: none;
    }
    
    .phone-mockup:hover {
        transform: scale(1.05);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .dictionaries-grid {
        grid-template-columns: repeat(6, 1fr); /* 6 columns for mobile (1 visible at a time) */
        grid-template-rows: repeat(2, 1fr); /* 2 rows for mobile */
        gap: var(--spacing-md); /* Reduced gap between dictionaries */
        width: 600%; /* 6 pages for mobile carousel */
    }
    
    .dictionaries-carousel {
        position: relative;
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    .dictionaries-container {
        flex: 1;
        overflow: hidden;
        position: relative;
        width: 16.67%; /* Show 1 column at a time on mobile (100% / 6 = 16.67%) */
    }
    
    .carousel-btn {
        position: absolute;
        z-index: 10;
        background: rgba(255, 107, 107, 0.9);
        backdrop-filter: blur(10px);
        border: 2px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        width: 40px;
        height: 40px;
    }
    
    .carousel-btn-prev {
        left: -25px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .carousel-btn-next {
        right: -25px;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .carousel-btn svg {
        width: 20px;
        height: 20px;
    }
    
    .dict-card {
        min-height: 200px; /* Ensure consistent card height */
    }
    
    .dict-image {
        height: 120px; /* Smaller image height for mobile */
    }
    
    .dict-info {
        padding: var(--spacing-md);
    }
    
    .dict-info h3 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-xs);
    }
    
    .dict-info p {
        font-size: var(--font-size-sm);
        margin-bottom: var(--spacing-sm);
    }
    
    .dict-tags {
        margin-bottom: var(--spacing-sm);
    }
    
    .tag {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .download-stats {
        gap: var(--spacing-xl);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .title-main {
        font-size: var(--font-size-3xl);
    }
    
    .phone-mockup {
        width: 200px;
        height: 400px;
        padding: 5px;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-base);
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* Scroll animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}