/**
 * AI Navigator - Modern Illustration-based Portfolio Style
 * Inspired by contemporary portfolio website templates
 */

/* ===== CSS VARIABLES ===== */
:root {
    /* Brand Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-warning: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* 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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

/* ===== BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--white);
    overflow-x: hidden;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.3;
    color: var(--gray-900);
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== NAVIGATION ===== */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    padding: var(--spacing-md) 0;
    transition: var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--gray-900);
    text-decoration: none;
}

.brand-icon {
    font-size: 1.5rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

.nav-link {
    font-weight: 500;
    color: var(--gray-700);
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
    transform: translateX(-50%);
}

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

/* ===== HERO SECTION ===== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.floating-elements {
    position: absolute;
    width: 100%;
    height: 100%;
}

.floating-element {
    position: absolute;
    font-size: 2rem;
    opacity: 0.3;
    animation: floatAround 20s infinite linear;
    pointer-events: none;
}

.element-1 { top: 10%; left: 10%; animation-delay: 0s; }
.element-2 { top: 20%; right: 15%; animation-delay: 3s; }
.element-3 { top: 60%; left: 5%; animation-delay: 6s; }
.element-4 { bottom: 30%; right: 10%; animation-delay: 9s; }
.element-5 { top: 40%; left: 80%; animation-delay: 12s; }
.element-6 { bottom: 10%; left: 20%; animation-delay: 15s; }

@keyframes floatAround {
    0% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -20px) rotate(90deg); }
    50% { transform: translate(-10px, -30px) rotate(180deg); }
    75% { transform: translate(-30px, 10px) rotate(270deg); }
    100% { transform: translate(0, 0) rotate(360deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: var(--spacing-2xl) 0;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    animation: slideInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
    animation: slideInUp 1s ease-out 0.2s both;
}

.hero-buttons {
    margin-bottom: var(--spacing-2xl);
    animation: slideInUp 1s ease-out 0.4s both;
}

.btn {
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
    color: var(--white);
    box-shadow: var(--shadow-md);
}

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

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

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-2xl);
    animation: slideInUp 1s ease-out 0.6s both;
}

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

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    font-family: var(--font-display);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== HERO ILLUSTRATION ===== */
.hero-illustration {
    position: relative;
    z-index: 2;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.illustration-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.main-illustration {
    position: relative;
    width: 100%;
    height: 100%;
    animation: slideInRight 1s ease-out 0.8s both;
}

.ai-brain {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
}

.brain-core {
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 50%;
    position: relative;
    animation: pulse 2s ease-in-out infinite;
}

.brain-core::before {
    content: '🧠';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.9; }
}

.neural-network {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.neural-node {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    animation: orbit 8s linear infinite;
}

.neural-node:nth-child(1) { top: 0; left: 50%; animation-delay: 0s; }
.neural-node:nth-child(2) { top: 50%; right: 0; animation-delay: 2s; }
.neural-node:nth-child(3) { bottom: 0; left: 50%; animation-delay: 4s; }
.neural-node:nth-child(4) { top: 50%; left: 0; animation-delay: 6s; }

@keyframes orbit {
    0% { transform: rotate(0deg) translateX(120px) rotate(0deg); }
    100% { transform: rotate(360deg) translateX(120px) rotate(-360deg); }
}

.tool-cards {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.tool-card {
    position: absolute;
    width: 60px;
    height: 60px;
    background: var(--white);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    animation: floatCard 3s ease-in-out infinite;
}

.card-1 { top: -30px; left: 50px; animation-delay: 0s; }
.card-2 { top: 50px; right: -30px; animation-delay: 0.5s; }
.card-3 { bottom: -30px; right: 50px; animation-delay: 1s; }
.card-4 { bottom: 50px; left: -30px; animation-delay: 1.5s; }

@keyframes floatCard {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(5deg); }
}

/* ===== SEARCH SECTION ===== */
.search-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.search-container {
    max-width: 800px;
    margin: 0 auto;
}

.search-bar-container {
    position: relative;
}

.search-input-group {
    position: relative;
}

.search-icon {
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    z-index: 2;
}

.search-input {
    height: 60px;
    padding-left: 3.5rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    font-size: 1.1rem;
    transition: var(--transition-normal);
    background: var(--white);
    box-shadow: var(--shadow-sm);
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    outline: none;
}

.filter-controls {
    background: var(--gray-50);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.filter-select {
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    font-weight: 500;
    transition: var(--transition-fast);
}

.filter-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
}

/* ===== CATEGORIES SECTION ===== */
.categories-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-2xl);
}

.category-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid var(--gray-200);
    cursor: pointer;
    height: 100%;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

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

.category-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--gray-900);
}

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

/* ===== WEBSITES SECTION ===== */
.websites-section {
    padding: var(--spacing-3xl) 0;
    background: var(--white);
}

.websites-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.results-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.view-options {
    display: flex;
    gap: var(--spacing-sm);
}

.websites-grid {
    margin-bottom: var(--spacing-2xl);
}

.website-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    border: 1px solid var(--gray-200);
    transition: var(--transition-normal);
    height: 100%;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.website-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-normal);
}

.website-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.website-card:hover::before {
    opacity: 1;
}

.website-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.website-thumbnail {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    flex-shrink: 0;
}

.website-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--gray-900);
}

.website-category {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 500;
}

.website-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

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

.rating-stars {
    color: var(--secondary-color);
}

.pricing-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-free {
    background: var(--gradient-success);
    color: var(--white);
}

.pricing-freemium {
    background: var(--gradient-warning);
    color: var(--white);
}

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

.website-features {
    margin-bottom: var(--spacing-lg);
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.feature-tag {
    background: var(--gray-100);
    color: var(--gray-700);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
}

.website-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

/* ===== STATISTICS SECTION ===== */
.statistics-section {
    padding: var(--spacing-3xl) 0;
    background: var(--gray-50);
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    text-align: center;
    border: 1px solid var(--gray-200);
    transition: var(--transition-normal);
}

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

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-display);
}

.stat-description {
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* ===== LOADING STATES ===== */
.loading-grid {
    margin-bottom: var(--spacing-2xl);
}

.skeleton-card {
    background: var(--white);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    border: 1px solid var(--gray-200);
    height: 100%;
}

.skeleton-header,
.skeleton-line,
.skeleton-footer {
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-sm);
}

.skeleton-header {
    height: 20px;
    width: 60%;
    margin-bottom: var(--spacing-lg);
}

.skeleton-line {
    height: 16px;
    width: 100%;
    margin-bottom: var(--spacing-sm);
}

.skeleton-line.short {
    width: 70%;
}

.skeleton-footer {
    height: 14px;
    width: 40%;
    margin-top: var(--spacing-lg);
}

@keyframes skeleton-loading {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ===== NO RESULTS STATE ===== */
.no-results {
    padding: var(--spacing-3xl);
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

/* ===== MODAL ===== */
.modal-modern .modal-content {
    border: none;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
}

.modal-modern .modal-header {
    padding: var(--spacing-2xl) var(--spacing-2xl) var(--spacing-lg);
}

.modal-modern .modal-body {
    padding: 0 var(--spacing-2xl) var(--spacing-2xl);
}

/* ===== FOOTER ===== */
.footer-section {
    background: var(--gray-900);
    color: var(--gray-300);
    padding: var(--spacing-2xl) 0;
}

.footer-brand h5 {
    color: var(--white);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

/* ===== ANIMATIONS ===== */
@keyframes slideInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    0% {
        opacity: 0;
        transform: translateX(30px);
    }
    100% {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .hero-stats {
        justify-content: center;
        gap: var(--spacing-lg);
    }
    
    .hero-buttons {
        text-align: center;
    }
    
    .hero-buttons .btn {
        display: block;
        margin-bottom: var(--spacing-sm);
    }
    
    .websites-header {
        flex-direction: column;
        gap: var(--spacing-lg);
        text-align: center;
    }
    
    .filter-controls .row {
        gap: var(--spacing-sm);
    }
    
    .search-input {
        height: 50px;
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .illustration-container {
        width: 300px;
        height: 300px;
    }
    
    .ai-brain {
        width: 150px;
        height: 150px;
    }
    
    .brain-core::before {
        font-size: 3rem;
    }
}

@media (max-width: 576px) {
    .hero-section {
        text-align: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stat-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-align: left;
        background: rgba(255, 255, 255, 0.1);
        padding: var(--spacing-md);
        border-radius: var(--radius-lg);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .category-card {
        padding: var(--spacing-lg);
    }
    
    .website-card {
        padding: var(--spacing-lg);
    }
    
    .filter-controls .col-md-4 {
        margin-bottom: var(--spacing-sm);
    }
}

/* ===== UTILITY CLASSES ===== */
.text-primary { color: var(--primary-color) !important; }
.text-secondary { color: var(--secondary-color) !important; }
.text-success { color: var(--accent-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-secondary { background-color: var(--secondary-color) !important; }
.bg-success { background-color: var(--accent-color) !important; }

.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow-md { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }

.rounded-lg { border-radius: var(--radius-lg) !important; }
.rounded-xl { border-radius: var(--radius-xl) !important; }
.rounded-2xl { border-radius: var(--radius-2xl) !important; }

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .website-card {
        border: 2px solid var(--gray-400);
    }
    
    .btn-outline-primary {
        border-width: 2px;
    }
}