/* Backtrack Website Styles */
:root {
    --primary: #FF6B47;
    --primary-dark: #E55A38;
    --secondary: #9C27B0;
    --gradient: linear-gradient(135deg, #FF6B47 0%, #E91E8C 50%, #9C27B0 100%);
    --text: #1F2937;
    --text-light: #6B7280;
    --bg: #FFFFFF;
    --bg-alt: #F9FAFB;
    --bg-dark: #111827;
    --border: #E5E7EB;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text);
}

.nav-icon { width: 36px; height: 36px; border-radius: 8px; }

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

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover { color: var(--primary); }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: 0.3s;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    cursor: pointer;
    border: none;
}

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

.btn-icon { width: 20px; height: 20px; }

.btn-small { padding: 8px 16px; font-size: 0.875rem; }
.btn-large { padding: 16px 32px; font-size: 1rem; }

.btn-primary { background: var(--gradient); color: white; }
.btn-secondary { background: var(--text); color: white; }
.btn-white { background: white; color: var(--text); }
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: white; }

/* Hero Section */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

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

/* Phone Mockup */
.phone-mockup {
    background: var(--text);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg);
    max-width: 320px;
    margin-left: auto;
}

.phone-screen {
    background: var(--bg);
    border-radius: 32px;
    overflow: hidden;
}

.app-preview { padding: 20px; }

.preview-header {
    font-weight: 600;
    font-size: 0.875rem;
    padding: 12px 16px;
    background: var(--bg-alt);
    border-radius: var(--radius);
    margin-bottom: 16px;
}

.preview-post {
    display: flex;
    gap: 12px;
    padding: 16px;
    background: var(--bg-alt);
    border-radius: var(--radius);
    margin-bottom: 12px;
}

.preview-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient);
    flex-shrink: 0;
}

.preview-avatar.alt { background: linear-gradient(135deg, #3B82F6, #8B5CF6); }

.preview-content p {
    font-size: 0.875rem;
    color: var(--text);
    margin-bottom: 8px;
    font-style: italic;
}

.preview-time {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* Sections */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 107, 71, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
}

.section-cta {
    text-align: center;
    margin-top: 48px;
}

/* Problem Section */
.section-problem { background: var(--bg-alt); }

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

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 4rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 12px;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-light);
}

/* Comparison */
.comparison {
    display: flex;
    align-items: stretch;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.comparison-item {
    flex: 1;
    padding: 32px;
    border-radius: var(--radius-lg);
}

.comparison-them {
    background: var(--bg-alt);
    border: 1px solid var(--border);
}

.comparison-us {
    background: var(--gradient);
    color: white;
}

.comparison-item h3 {
    font-size: 1.25rem;
    margin-bottom: 20px;
}

.comparison-item ul {
    list-style: none;
}

.comparison-item li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.comparison-them li::before {
    content: "✕";
    position: absolute;
    left: 0;
    color: #EF4444;
}

.comparison-us li::before {
    content: "✓";
    position: absolute;
    left: 0;
}

.comparison-vs {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-light);
}

/* Steps */
.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-alt);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.step-icon svg {
    width: 36px;
    height: 36px;
    stroke: var(--primary);
}

.step h3 {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.step p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Features Grid */
.section-features { background: var(--bg-alt); }

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature {
    background: var(--bg);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: rgba(255, 107, 71, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--primary);
}

.feature h3 {
    font-size: 1.125rem;
    margin-bottom: 8px;
}

.feature p {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Use Cases */
.usecases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.usecase {
    text-align: center;
    padding: 32px 24px;
    background: var(--bg-alt);
    border-radius: var(--radius-lg);
    transition: transform 0.2s;
}

.usecase:hover { transform: translateY(-4px); }

.usecase-emoji {
    font-size: 3rem;
    margin-bottom: 16px;
}

.usecase h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.usecase p {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Final CTA */
.section-cta-final {
    background: var(--gradient);
    padding: 100px 0;
}

.cta-card {
    text-align: center;
    color: white;
}

.cta-card h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.cta-card p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

.cta-card .hero-cta { justify-content: center; }

.cta-note {
    margin-top: 16px;
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    margin-top: 16px;
    max-width: 280px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-icon { width: 36px; height: 36px; border-radius: 8px; }

.footer-links h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 6px 0;
    transition: color 0.2s;
}

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

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.875rem;
}

/* Legal Pages */
.legal-content { padding: 140px 0 80px; }
.legal-content h1 { font-size: 2.5rem; margin-bottom: 8px; }
.legal-content .updated { color: var(--text-light); margin-bottom: 40px; }
.legal-content h2 { font-size: 1.5rem; margin-top: 48px; margin-bottom: 16px; }
.legal-content h3 { font-size: 1.125rem; margin-top: 32px; margin-bottom: 12px; }
.legal-content p { margin-bottom: 16px; color: var(--text-light); }
.legal-content ul, .legal-content ol { margin-bottom: 16px; padding-left: 24px; }
.legal-content li { margin-bottom: 8px; color: var(--text-light); }
.legal-content a { color: var(--primary); }

/* Support Page */
.support-content { padding: 140px 0 80px; text-align: center; }
.support-content h1 { font-size: 2.5rem; margin-bottom: 16px; }
.support-content > p { color: var(--text-light); margin-bottom: 40px; }
.contact-info { background: var(--bg-alt); padding: 40px; border-radius: var(--radius-lg); max-width: 500px; margin: 0 auto; }
.contact-info h2 { font-size: 1.25rem; margin-bottom: 16px; }
.contact-info a { color: var(--primary); text-decoration: none; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .hero-content { order: 1; }
    .hero-visual { order: 2; }
    .phone-mockup { margin: 0 auto; }
    .hero-subtitle { margin: 0 auto 32px; }
    .hero-cta { justify-content: center; }
    .stats-grid { grid-template-columns: 1fr; gap: 32px; }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .usecases-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border);
        gap: 16px;
    }
    .nav-links.active { display: flex; }
    .nav-toggle { display: flex; }
    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    .hero-title { font-size: 2.5rem; }
    .section { padding: 60px 0; }
    .section-header h2 { font-size: 2rem; }
    .comparison { flex-direction: column; }
    .comparison-vs { justify-content: center; padding: 16px 0; }
    .steps { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .usecases-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    .cta-card h2 { font-size: 2rem; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .hero-cta { flex-direction: column; }
    .btn-large { width: 100%; justify-content: center; }
    .stat-number { font-size: 3rem; }
}