/* FitPulse - Fitness Tracking Platform */

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

:root {
    --primary-color: #dc2626;
    --primary-dark: #b91c1c;
    --primary-light: #ef4444;
    --secondary-color: #0f172a;
    --accent-color: #f59e0b;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #fef2f2;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --transition: all 0.3s ease;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

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

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

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

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-nav {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Navigation */
.navbar {
    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-color);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary-color);
}

.logo-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* Hero Section */
.hero {
    padding: 8rem 0 5rem;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.375rem 1rem;
    border-radius: 20px;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

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

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Feed Mockup */
.feed-mockup {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.feed-header {
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.feed-title {
    font-weight: 700;
    color: var(--secondary-color);
}

.feed-post {
    display: flex;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.feed-post:last-child {
    border-bottom: none;
}

.post-avatar {
    width: 44px;
    height: 44px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.post-avatar.female {
    background: #ec4899;
}

.post-content {
    flex: 1;
}

.post-author {
    font-weight: 700;
    color: var(--secondary-color);
    font-size: 0.9375rem;
    margin-bottom: 0.375rem;
}

.post-workout {
    display: flex;
    flex-direction: column;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.post-workout strong {
    color: var(--text-primary);
}

.post-age {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.8125rem;
    margin-top: 0.25rem;
}

.post-reactions {
    display: flex;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--text-light);
}

/* Social Proof */
.social-proof {
    background: var(--secondary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.social-proof p {
    font-size: 1.125rem;
    font-style: italic;
    margin-bottom: 0.5rem;
}

.social-proof cite {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    color: var(--secondary-color);
    margin-bottom: 3rem;
}

/* Features Section */
.features {
    padding: 5rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* Community Section */
.community {
    padding: 5rem 0;
    background: var(--bg-tertiary);
}

.community-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.community-content h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.community-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1.0625rem;
}

.community-values {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2rem;
}

.value {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
    font-weight: 500;
}

.value-icon {
    font-size: 1.25rem;
}

.testimonial-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
}

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    font-size: 1.125rem;
    color: var(--text-primary);
    line-height: 1.7;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    color: var(--secondary-color);
}

.author-info span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Age Groups */
.age-groups {
    padding: 5rem 0;
}

.age-groups-visual {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.age-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem 2rem;
    text-align: center;
    transition: var(--transition);
}

.age-card.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.age-range {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
}

.age-athletes {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.age-card.active .age-athletes {
    color: rgba(255, 255, 255, 0.8);
}

/* Pricing Section */
.pricing {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 2rem;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

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

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.price {
    margin-bottom: 1.5rem;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--secondary-color);
}

.price-period {
    color: var(--text-secondary);
}

.pricing-features {
    margin-bottom: 2rem;
    text-align: left;
}

.pricing-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pricing-features li::before {
    content: '✓';
    color: var(--accent-color);
    font-weight: 700;
}

/* CTA Section */
.cta {
    padding: 5rem 0;
    text-align: center;
    background: var(--secondary-color);
    color: white;
}

.cta h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.125rem;
    opacity: 0.8;
    margin-bottom: 2rem;
}

/* Footer */
.footer {
    background: var(--secondary-color);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--text-light);
    font-size: 0.9375rem;
}

.footer-links h4 {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--text-light);
    font-size: 0.9375rem;
    display: block;
    padding: 0.25rem 0;
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

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

.company-info {
    margin-top: 0.5rem;
    font-size: 0.75rem;
}

/* Opt-In Page Styles */
.optin-page {
    padding: 8rem 0 4rem;
    min-height: 100vh;
    background: var(--bg-secondary);
}

.optin-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.optin-header {
    text-align: center;
    margin-bottom: 2rem;
}

.optin-header h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.optin-header p {
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.phone-input-group {
    display: flex;
    gap: 0.5rem;
}

.phone-input-group select {
    width: 140px;
    flex-shrink: 0;
}

.phone-input-group input {
    flex: 1;
}

.consent-box {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin: 2rem 0;
}

.consent-title {
    font-weight: 700;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.consent-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    cursor: pointer;
}

.consent-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.consent-checkbox label {
    font-size: 0.9375rem;
    color: var(--text-primary);
    cursor: pointer;
    line-height: 1.5;
}

.consent-checkbox .required {
    color: #ef4444;
}

.consent-text {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #dc2626;
    padding: 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
    display: none;
}

.error-message.show {
    display: block;
}

.success-message {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #16a34a;
    padding: 1.5rem;
    border-radius: var(--radius);
    text-align: center;
    margin-bottom: 1rem;
    display: none;
}

.success-message.show {
    display: block;
}

.success-message h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.submit-btn {
    width: 100%;
    padding: 1rem;
    font-size: 1.0625rem;
}

/* Legal Pages */
.legal-page {
    padding: 8rem 0 4rem;
    min-height: 100vh;
    background: var(--bg-secondary);
}

.legal-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 3rem;
    box-shadow: var(--shadow);
}

.legal-header {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.legal-header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--secondary-color);
}

.legal-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: 2rem 0 1rem;
}

.legal-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: 1.5rem 0 0.75rem;
}

.legal-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.legal-content ul {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.legal-content li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    list-style: disc;
}

.sms-terms-section {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin: 2rem 0;
}

.sms-terms-section h2 {
    margin-top: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .hero-stats {
        justify-content: center;
    }

    .features-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .community-split {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

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

    .hero-stats {
        flex-wrap: wrap;
        gap: 1.5rem;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .age-groups-visual {
        flex-direction: column;
        align-items: center;
    }
}