/* ========================================
   GuideVault — Premium Design System
   ======================================== */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-tertiary: #1a1a24;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    
    --text-primary: #f0f0f5;
    --text-secondary: #9898a6;
    --text-muted: #5a5a6e;
    
    --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --accent-blue: #667eea;
    --accent-purple: #764ba2;
    --accent-pink: #f093fb;
    
    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 60px rgba(102, 126, 234, 0.15);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Reset & Base
   ======================================== */

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* ========================================
   Background Particles
   ======================================== */

.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
    animation: floatParticle linear infinite;
}

@keyframes floatParticle {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 0.15; }
    90% { opacity: 0.15; }
    100% { transform: translateY(-10vh) rotate(720deg); opacity: 0; }
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 10;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 1px;
    transition: var(--transition);
}

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-ghost {
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px 16px;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.btn-primary-nav {
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    background: var(--accent-gradient);
    border: none;
    cursor: pointer;
    padding: 10px 22px;
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.btn-primary-nav:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 10;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    z-index: 999;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.mobile-menu.active {
    opacity: 1;
    pointer-events: all;
}

.mobile-link {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

.mobile-cta {
    margin-top: 16px;
    padding: 14px 32px;
    font-size: 1rem;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 60px;
    position: relative;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(102, 126, 234, 0.12) 0%, rgba(118, 75, 162, 0.06) 40%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 32px;
    letter-spacing: 0.5px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-blue);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

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

.hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 48px;
}

/* ========================================
   Search Box
   ======================================== */

.search-container {
    max-width: 680px;
    margin: 0 auto 40px;
}

.search-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 6px;
    transition: var(--transition);
    position: relative;
}

.search-wrapper:focus-within {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1), var(--shadow-glow);
}

.search-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 16px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    padding: 14px 0;
    outline: none;
    min-width: 0;
}

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

.search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.search-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.5);
}

.search-btn:active {
    transform: translateY(0);
}

.search-btn-arrow {
    transition: var(--transition);
}

.search-btn:hover .search-btn-arrow {
    transform: translateX(3px);
}

.search-suggestions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
    justify-content: center;
}

.suggestion-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.suggestion-tag {
    font-family: 'Inter', sans-serif;
    font-size: 0.78rem;
    font-weight: 500;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.suggestion-tag:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.3);
    color: var(--accent-blue);
}

/* ========================================
   Hero Trust Section
   ======================================== */

.hero-trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.trust-avatars {
    display: flex;
}

.trust-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    border: 2px solid var(--bg-primary);
    margin-left: -8px;
}

.trust-avatar:first-child {
    margin-left: 0;
}

.trust-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========================================
   Animations
   ======================================== */

.animate-in {
    opacity: 0;
    transform: translateY(30px);
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }

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

/* ========================================
   Stats Bar
   ======================================== */

.stats-bar {
    position: relative;
    z-index: 2;
    padding: 0 24px;
    margin-top: -40px;
    margin-bottom: 80px;
}

.stats-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 40px 60px;
    box-shadow: var(--shadow-lg);
}

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

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 4px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: var(--border-color);
}

/* ========================================
   Section Headers
   ======================================== */

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent-blue);
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ========================================
   Features
   ======================================== */

.features {
    padding: 100px 0;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   Categories
   ======================================== */

.categories {
    padding: 100px 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.category-card::after {
    content: '→';
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: var(--transition);
    opacity: 0;
    transform: translateX(-8px);
}

.category-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.category-card:hover::after {
    opacity: 1;
    transform: translateX(0);
    color: var(--accent-blue);
}

.category-emoji {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.category-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.category-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.category-count {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-blue);
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
    padding: 60px 0 100px;
}

.cta-card {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 80px 60px;
    text-align: center;
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.cta-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    position: relative;
}

.cta-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 40px;
    position: relative;
}

.cta-search {
    max-width: 580px;
    margin: 0 auto;
    position: relative;
}

/* ========================================
   FAQ Section
   ======================================== */

.faq {
    padding: 100px 0;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-item.active {
    border-color: rgba(102, 126, 234, 0.3);
    background: rgba(102, 126, 234, 0.03);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-weight: 600;
    font-size: 0.95rem;
}

.faq-chevron {
    color: var(--text-muted);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-chevron {
    transform: rotate(180deg);
    color: var(--accent-blue);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0 24px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}

/* ========================================
   Footer
   ======================================== */

.footer {
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

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

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 300px;
}

.footer-links-group h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-links-group a {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
    transition: var(--transition-fast);
}

.footer-links-group a:hover {
    color: var(--text-primary);
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ========================================
   Scroll Reveal
   ======================================== */

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Loading Animation (Search)
   ======================================== */

.search-loading {
    position: relative;
}

.search-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    border-radius: inherit;
    opacity: 0.8;
    animation: loadingPulse 1s ease-in-out infinite;
}

@keyframes loadingPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .features-grid,
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        gap: 24px;
        padding: 32px 40px;
    }
    
    .stat-number {
        font-size: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu {
        display: flex;
    }
    
    .hero {
        padding: 100px 20px 40px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .search-btn-text {
        display: none;
    }

    .search-btn {
        padding: 14px 16px;
    }

    .stats-grid {
        flex-direction: column;
        gap: 20px;
        padding: 32px;
    }

    .stat-divider {
        width: 60px;
        height: 1px;
    }

    .features-grid,
    .categories-grid {
        grid-template-columns: 1fr;
    }

    .cta-card {
        padding: 48px 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-brand {
        grid-column: span 1;
    }
}

@media (max-width: 480px) {
    .hero-badge {
        font-size: 0.72rem;
        padding: 6px 14px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .search-suggestions {
        gap: 6px;
    }

    .suggestion-tag {
        font-size: 0.72rem;
        padding: 5px 10px;
    }

    .hero-trust {
        flex-direction: column;
        gap: 8px;
    }

    .section-title {
        font-size: 1.6rem;
    }
}