/* 
   aipornhub.site Styles
   A unique design with blue color scheme
*/

/* CSS Variables */
:root {
    /* Primary Colors */
    --primary: #0088CC;
    --primary-light: #00D1E8;
    --primary-dark: #006699;
    
    /* Secondary Colors */
    --secondary: #2d3748;
    --secondary-light: #4a5568;
    --secondary-dark: #1a202c;
    
    /* Text Colors */
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #ffffff;
    --text-muted: #718096;
    
    /* Background Colors */
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --bg-gray: #edf2f7;
    --bg-dark: #2d3748;
    
    /* Border Colors */
    --border-color: #e2e8f0;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Font */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    --font-heading: 'Montserrat', var(--font-primary);
    
    /* Layout */
    --container-max: 1200px;
    --header-height: 70px;
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-light);
    line-height: 1.5;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

ul, ol {
    list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--secondary-dark);
}

h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

h4 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1.5rem;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--primary-light));
    border-radius: var(--radius-full);
}

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

.site-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.site-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

/* Navigation */
.nav-list {
    display: flex;
    gap: var(--spacing-md);
}

.nav-list a {
    font-weight: 600;
    position: relative;
    padding: var(--spacing-xs) 0;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition-normal);
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 2000;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--secondary-dark);
    margin: 5px 0;
    transition: var(--transition-normal);
    border-radius: var(--radius-full);
}

/* Mobile Navigation */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100%;
    background-color: var(--bg-white);
    z-index: 1500;
    padding: var(--spacing-xl) var(--spacing-md);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    overflow-y: auto;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav ul {
    margin-top: var(--spacing-xl);
}

.mobile-nav li {
    margin-bottom: var(--spacing-md);
}

.mobile-nav a {
    font-size: 1.25rem;
    font-weight: 600;
    display: block;
    padding: var(--spacing-xs) 0;
}

.close-menu {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--secondary-dark);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1400;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Hero Section */
.hero-section {
    padding-top: calc(var(--header-height) + var(--spacing-xl));
    padding-bottom: var(--spacing-xl);
    background-color: var(--bg-light);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 550px;
}

.hero-tagline {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

.hero-visual {
    position: absolute;
    top: 50%;
    right: 5%;
    transform: translateY(-50%);
    width: 40%;
    max-width: 500px;
}

.hero-graphic {
    width: 100%;
    height: auto;
}

.wave-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.wave-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
}

.wave-divider-bottom {
    transform: rotate(180deg);
    bottom: -1px;
}

/* Features Section */
.features-section {
    background-color: var(--bg-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-sm);
}

/* Categories Section */
.categories-section {
    background-color: var(--bg-gray);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.category-card {
    background-color: var(--bg-white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.category-card:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-md);
}

.category-icon {
    width: 60px;
    height: 60px;
    margin-bottom: var(--spacing-sm);
}

.category-card h4 {
    color: var(--primary-dark);
    margin-bottom: 0;
}

/* Premium Section */
.premium-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    color: var(--text-light);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.premium-section h2 {
    color: var(--text-light);
}

.premium-description {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

.premium-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

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

.check-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

/* FAQ Section */
.faq-section {
    background-color: var(--bg-white);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.faq-item {
    padding: var(--spacing-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    color: var(--text-light);
    text-align: center;
    padding: var(--spacing-xl) 0;
    position: relative;
}

.cta-section h2 {
    color: var(--text-light);
}

/* Footer */
.site-footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: var(--spacing-lg) 0 var(--spacing-sm);
}

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

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

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

.footer-menu h4 {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-bottom: var(--spacing-xs);
}

.footer-menu h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background-color: var(--primary);
}

.footer-menu ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-menu a {
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.footer-menu a:hover {
    color: var(--text-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-light);
    border: 2px solid var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--text-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary);
    color: var(--text-light);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.cta-group {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Media Queries */
@media (max-width: 1024px) {
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.25rem;
    }
    
    .hero-visual {
        width: 45%;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero-content {
        max-width: 100%;
        text-align: center;
        margin: 0 auto;
    }
    
    .hero-visual {
        position: relative;
        top: auto;
        right: auto;
        transform: none;
        width: 80%;
        max-width: 400px;
        margin: var(--spacing-lg) auto 0;
    }
    
    .main-nav {
        display: none;
    }
    
    .nav-toggle {
        display: block;
    }
    
    .premium-features {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .footer-top {
        flex-direction: column;
    }
    
    .footer-nav {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 576px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .hero-section {
        padding-top: calc(var(--header-height) + var(--spacing-lg));
    }
    
    .features-grid, 
    .categories-grid, 
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}