:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --accent: #f093fb;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9ff;
    --bg-card: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border: #e2e8f0;
    --shadow: rgba(102, 126, 234, 0.1);
    --shadow-hover: rgba(102, 126, 234, 0.2);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 80px 0 100px;
    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(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 60px;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    opacity: 0.95;
    max-width: 600px;
    margin-bottom: 48px;
    font-weight: 400;
}

/* Search */
.hero-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    max-width: 800px;
}

.hero-tab {
    flex: 1;
    padding: 14px 28px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: white;
    font-size: 15px;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
}

.hero-tab:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.hero-tab.active {
    background: white;
    color: var(--primary);
    border-color: white;
}

.search-container {
    position: relative;
    max-width: 600px;
}

.ai-search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-search-btn:hover {
    transform: translateY(-50%) scale(1.05);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.ai-search-results {
    max-width: 600px;
    margin-top: 24px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    color: var(--text-primary);
    display: none;
    animation: slideDown 0.3s ease;
}

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

.ai-search-results h3 {
    margin-bottom: 12px;
    color: var(--primary);
}

.ai-search-results ul {
    list-style: none;
    padding: 0;
}

.ai-search-results li {
    padding: 8px 0;
    cursor: pointer;
    transition: color 0.3s ease;
}

.ai-search-results li:hover {
    color: var(--primary);
}

.search-container {
    position: relative;
    max-width: 600px;
}

.search-icon {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 18px 20px 18px 56px;
    font-size: 16px;
    border: none;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--text-primary);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.search-input:focus {
    outline: none;
    background: white;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

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

/* Mission */
.mission {
    padding: 80px 0;
    background: var(--bg-primary);
}

.mission-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.mission-content h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mission-content p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Filters */
.filters {
    padding: 40px 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.filter-header {
    display: flex;
    gap: 24px;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.filter-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    flex: 1;
}

.quick-search {
    min-width: 200px;
}

.quick-search-input {
    width: 100%;
    padding: 10px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s ease;
}

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

.filter-btn {
    padding: 12px 24px;
    border: 2px solid var(--border);
    background: white;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Inter', sans-serif;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border-color: transparent;
}

/* Tools Grid */
.tools-section {
    padding: 60px 0 100px;
    background: var(--bg-secondary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    animation: fadeIn 0.6s ease;
}

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

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px var(--shadow-hover);
    border-color: var(--primary);
}

.tool-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.tool-icon {
    font-size: 40px;
    flex-shrink: 0;
}

.tool-info {
    flex: 1;
}

.tool-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.tool-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-description {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: 20px;
}

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

.tool-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    font-size: 14px;
    transition: gap 0.3s ease;
}

.tool-link:hover {
    gap: 12px;
}

.tool-badge {
    padding: 6px 12px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
}

.badge-free {
    background: rgba(76, 175, 80, 0.1);
    color: #4caf50;
}

.rank-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 10;
}

.rank-1 {
    background: linear-gradient(135deg, #FFD700, #FFA500);
    color: white;
}

.rank-2 {
    background: linear-gradient(135deg, #C0C0C0, #A8A8A8);
    color: white;
}

.rank-3 {
    background: linear-gradient(135deg, #CD7F32, #B87333);
    color: white;
}

/* No Results */
.no-results {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.no-results p {
    font-size: 18px;
}

/* Featured Video */
.featured-video {
    padding: 80px 0;
    background: var(--bg-primary);
}

.featured-video h2 {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.video-wrapper {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.video-placeholder {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    padding: 120px 40px;
    text-align: center;
    border: 2px dashed var(--border);
}

.video-placeholder p {
    margin-top: 24px;
    color: var(--text-muted);
    font-size: 16px;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand p {
    margin-top: 16px;
    opacity: 0.8;
    font-size: 14px;
}

.footer-column h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 12px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.footer-column a:hover {
    color: white;
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    opacity: 0.7;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 40px;
    width: 90%;
    max-width: 800px;
    border-radius: 16px;
    position: relative;
    animation: slideUp 0.3s ease;
    max-height: 85vh;
    overflow-y: auto;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.close {
    position: absolute;
    right: 24px;
    top: 24px;
    font-size: 32px;
    font-weight: 300;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.3s ease;
}

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

.modal-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.modal-icon {
    font-size: 64px;
}

.modal-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-category {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-radius: 12px;
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 8px;
}

.modal-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.modal-video {
    margin-bottom: 32px;
    border-radius: 12px;
    overflow: hidden;
}

.modal-video iframe {
    width: 100%;
    height: 400px;
    border: none;
}

.modal-features {
    margin-bottom: 32px;
}

.modal-features h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.modal-features ul {
    list-style: none;
    padding: 0;
}

.modal-features li {
    padding: 12px 0;
    padding-left: 32px;
    position: relative;
    color: var(--text-secondary);
}

.modal-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
    font-size: 18px;
}

.modal-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
}

.modal-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--shadow-hover);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-buttons {
        overflow-x: auto;
        flex-wrap: nowrap;
        justify-content: flex-start;
        padding-bottom: 8px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
    
    .mission-content h2,
    .featured-video h2 {
        font-size: 32px;
    }
    
    .modal-content {
        width: 95%;
        padding: 24px;
        margin: 10% auto;
    }
    
    .modal-video iframe {
        height: 250px;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    animation: pulse 2s ease-in-out infinite;
}