/* ===========================================
   XMarks Landing Page Styles
   Modern, minimal design inspired by Linear/Raycast
   =========================================== */

/* CSS Variables */
:root {
    /* Colors - Dark theme */
    --bg-primary: #09090b;
    --bg-secondary: #111113;
    --bg-tertiary: #18181b;
    --bg-elevated: #1f1f23;
    
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-inverse: #09090b;
    
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --accent-muted: rgba(245, 158, 11, 0.15);
    
    --success: #22c55e;
    --error: #ef4444;
    
    --border: #27272a;
    --border-light: #3f3f46;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 120px;
    --section-padding-mobile: 80px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(245, 158, 11, 0.15);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================================
   Buttons
   =========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1;
    border-radius: 8px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: var(--text-inverse);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* ===========================================
   Navigation
   =========================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: all var(--transition-normal);
}

.nav.scrolled {
    background: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.nav-logo svg {
    color: var(--text-primary);
}

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

.nav-link {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

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

.nav-mobile-toggle {
    display: none;
    padding: 8px;
    color: var(--text-primary);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 99;
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
}

.mobile-link {
    display: block;
    padding: 12px 0;
    font-size: 1rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

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

.mobile-divider {
    height: 1px;
    background: var(--border);
    margin: 8px 0;
}

.mobile-menu .btn {
    margin-top: 16px;
}

/* ===========================================
   Hero Section
   =========================================== */
.hero {
    position: relative;
    padding: 160px 0 100px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(245, 158, 11, 0.08) 0%, transparent 70%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, black, transparent);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--accent-muted);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--accent);
    margin-bottom: 32px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, #fbbf24 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.hero-note {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Hero Visual */
.hero-visual {
    max-width: 1000px;
    margin: 0 auto;
}

.browser-frame {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.browser-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border);
}

.browser-dots {
    display: flex;
    gap: 8px;
}

.browser-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-elevated);
}

.browser-dots span:nth-child(1) { background: #ef4444; }
.browser-dots span:nth-child(2) { background: #eab308; }
.browser-dots span:nth-child(3) { background: #22c55e; }

.browser-url {
    flex: 1;
    padding: 8px 16px;
    background: var(--bg-primary);
    border-radius: 6px;
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.browser-content {
    aspect-ratio: 16 / 9;
    background: var(--bg-primary);
}

.dashboard-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Placeholder Dashboard */
.dashboard-placeholder {
    display: none;
    width: 100%;
    height: 100%;
    gap: 0;
}

.placeholder-sidebar {
    width: 220px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 20px 16px;
}

.placeholder-logo {
    width: 100px;
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 32px;
}

.placeholder-nav-item {
    height: 36px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    margin-bottom: 8px;
}

.placeholder-nav-item.active {
    background: var(--accent-muted);
}

.placeholder-divider {
    height: 1px;
    background: var(--border);
    margin: 16px 0;
}

.placeholder-category {
    height: 28px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 8px;
    width: 80%;
}

.placeholder-main {
    flex: 1;
    padding: 24px;
}

.placeholder-header {
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    margin-bottom: 24px;
    width: 300px;
}

.placeholder-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.placeholder-card {
    aspect-ratio: 1;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
}

/* ===========================================
   Problem/Solution Section
   =========================================== */
.problem-section {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.problem-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.problem-text {
    font-size: 2rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 24px;
}

.text-muted {
    color: var(--text-tertiary);
}

.solution-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===========================================
   Features Section
   =========================================== */
.features {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 64px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

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

.feature-card {
    padding: 32px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.feature-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===========================================
   How It Works Section
   =========================================== */
.how-it-works {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 900px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    padding: 0 24px;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--accent);
    color: var(--text-inverse);
    font-size: 1rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 24px;
}

.step-content {
    margin-bottom: 24px;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.step-visual {
    display: flex;
    justify-content: center;
}

.step-icon-box {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 16px;
    color: var(--accent);
}

.step-connector {
    width: 60px;
    height: 2px;
    background: var(--border);
    margin-top: 20px;
    flex-shrink: 0;
}

/* ===========================================
   Discover Preview Section
   =========================================== */
.discover-preview {
    padding: var(--section-padding) 0;
}

.discover-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.discover-text .section-title {
    text-align: left;
    margin-bottom: 16px;
}

.discover-text .section-subtitle {
    text-align: left;
    margin-bottom: 32px;
}

.discover-features {
    list-style: none;
}

.discover-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* Swipe Cards Visual */
.discover-visual {
    display: flex;
    justify-content: center;
    perspective: 1000px;
}

.swipe-cards {
    position: relative;
    width: 300px;
    height: 380px;
}

.swipe-card {
    position: absolute;
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition-slow);
}

.swipe-card.card-3 {
    top: 16px;
    transform: scale(0.9) translateY(16px);
    opacity: 0.4;
}

.swipe-card.card-2 {
    top: 8px;
    transform: scale(0.95) translateY(8px);
    opacity: 0.7;
}

.swipe-card.card-1 {
    top: 0;
    transform: scale(1);
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    border-bottom: 1px solid var(--border);
}

.card-avatar {
    width: 44px;
    height: 44px;
    background: var(--bg-tertiary);
    border-radius: 50%;
}

.card-author {
    flex: 1;
}

.card-name {
    height: 14px;
    width: 100px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    margin-bottom: 6px;
}

.card-handle {
    height: 12px;
    width: 70px;
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.card-body {
    padding: 20px 16px;
    min-height: 120px;
}

.card-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.card-category {
    margin-top: 16px;
}

.category-badge {
    display: inline-block;
    padding: 6px 12px;
    background: var(--accent-muted);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 100px;
}

.card-actions {
    display: flex;
    justify-content: center;
    gap: 32px;
    padding: 16px;
    border-top: 1px solid var(--border);
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.action-btn.skip {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 2px solid rgba(239, 68, 68, 0.3);
}

.action-btn.skip:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: scale(1.1);
}

.action-btn.save {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 2px solid rgba(34, 197, 94, 0.3);
}

.action-btn.save:hover {
    background: rgba(34, 197, 94, 0.2);
    transform: scale(1.1);
}

/* ===========================================
   Pricing Section
   =========================================== */
.pricing {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.pricing-card {
    max-width: 400px;
    margin: 0 auto;
    padding: 40px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 16px;
    text-align: center;
}

.pricing-header {
    margin-bottom: 32px;
}

.pricing-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 8px;
}

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1;
}

.price-period {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
    text-align: left;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 1rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-note {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ===========================================
   FAQ Section
   =========================================== */
.faq {
    padding: var(--section-padding) 0;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 24px 0;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question svg {
    flex-shrink: 0;
    color: var(--text-tertiary);
    transition: transform var(--transition-normal);
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.open .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding-bottom: 24px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===========================================
   Final CTA Section
   =========================================== */
.final-cta {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.cta-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* ===========================================
   Footer
   =========================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 80px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.footer-tagline {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.footer-column a {
    display: block;
    font-size: 0.9375rem;
    color: var(--text-secondary);
    padding: 8px 0;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ===========================================
   Animations
   =========================================== */
.animate-fade-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.6s ease forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* ===========================================
   Responsive Design
   =========================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .discover-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .discover-text {
        text-align: center;
    }
    
    .discover-text .section-title,
    .discover-text .section-subtitle {
        text-align: center;
    }
    
    .discover-features {
        display: inline-block;
        text-align: left;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: var(--section-padding-mobile);
    }
    
    .nav-links,
    .nav-actions {
        display: none;
    }
    
    .nav-mobile-toggle {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 2.25rem;
    }
    
    .hero-subtitle {
        font-size: 1.0625rem;
    }
    
    .problem-text {
        font-size: 1.5rem;
    }
    
    .solution-text {
        font-size: 1.0625rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
        gap: 40px;
    }
    
    .step-connector {
        width: 2px;
        height: 40px;
        margin: 0 auto;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .swipe-cards {
        width: 260px;
        height: 340px;
    }
}

@media (max-width: 480px) {
    .hero-badge {
        font-size: 0.75rem;
        padding: 6px 12px;
    }
    
    .hero-title {
        font-size: 1.875rem;
    }
    
    .btn-lg {
        padding: 14px 24px;
        font-size: 0.9375rem;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .pricing-card {
        padding: 32px 24px;
    }
    
    .price-amount {
        font-size: 2.5rem;
    }
}