/* ===== CSS RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Scheme */
    --primary: #3B82F6;
    --accent: #F59E0B;
    --secondary: #10B981;
    --background: #F9FAFB;
    --card-bg: #FFFFFF;
    --text-primary: #111827;
    --text-muted: #6B7280;
    --border-color: #E5E7EB;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 80px 20px;
    --card-radius: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== HEADER & NAVIGATION ===== */
.header {
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-image {
    height: 48px;
    width: auto;
    max-height: 48px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.auth-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

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

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.nav-mobile {
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
}

.nav-mobile.active {
    display: flex;
}

.nav-link-mobile {
    color: var(--text-primary);
    text-decoration: none;
    padding: 12px 16px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 8px;
    transition: background 0.2s;
}

.nav-link-mobile:hover {
    background: var(--background);
}

.mobile-auth-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: #2563EB;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--primary);
    padding: 10px 16px;
}

.btn-secondary:hover {
    color: #2563EB;
    text-decoration: underline;
}

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
}

.btn-full {
    width: 100%;
}

.link-secondary {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    text-align: center;
    display: block;
    margin-top: 16px;
}

.link-secondary:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
    padding: 80px 20px;
}

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

.hero-left {
    max-width: 600px;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.hero-reassurance {
    font-size: 14px;
    color: var(--text-muted);
    font-style: italic;
}

.hero-cards {
    display: grid;
    gap: 20px;
}

.hero-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-md);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.hero-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), #2563EB);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    position: relative;
}

.hero-card-icon::before {
    content: '';
    position: absolute;
    width: 28px;
    height: 28px;
    background: white;
    border-radius: 6px;
}

.icon-phone::after {
    content: '📱';
    position: absolute;
    font-size: 20px;
}

.icon-badge::after {
    content: '★';
    position: absolute;
    font-size: 24px;
    color: var(--accent);
}

.icon-dashboard::after {
    content: '◆';
    position: absolute;
    font-size: 24px;
    color: var(--primary);
}

.hero-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.hero-card p {
    color: var(--text-muted);
    font-size: 14px;
}

/* ===== SECTION STYLES ===== */
section {
    padding: 96px 20px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.2;
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 56px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* ===== HOW IT WORKS SECTION ===== */
.how-it-works {
    background: var(--card-bg);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.step-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--background);
    border-radius: var(--card-radius);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.step-number {
    width: 64px;
    height: 64px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.step-description {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.6;
}

/* ===== WHO IT'S FOR SECTION ===== */
.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.audience-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-md);
}

.audience-header {
    margin-bottom: 16px;
}

.audience-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), #2563EB);
    color: white;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.audience-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.audience-list {
    list-style: none;
}

.audience-list li {
    padding: 12px 0 12px 32px;
    position: relative;
    color: var(--text-muted);
    font-size: 16px;
}

.audience-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: 700;
    font-size: 18px;
}

/* ===== AGE TRACKS SECTION ===== */
.age-tracks {
    background: var(--card-bg);
}

.tracks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.track-card {
    background: var(--background);
    padding: 32px;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-md);
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 2px solid transparent;
}

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

.track-featured {
    border-color: var(--primary);
    background: #EFF6FF;
}

.track-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--primary);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.track-age {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.track-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.track-description {
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.6;
}

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

.track-features li {
    padding: 8px 0 8px 24px;
    position: relative;
    color: var(--text-muted);
    font-size: 14px;
}

.track-features li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 600;
}

/* ===== FEATURES SECTION ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-icon-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.6;
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
    background: var(--card-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.testimonial-card {
    background: var(--background);
    padding: 32px;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-sm);
}

.testimonial-rating {
    display: inline-block;
    background: var(--secondary);
    color: white;
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.testimonial-rating::after {
    content: ' / 5';
    font-size: 14px;
    opacity: 0.9;
}

.testimonial-quote {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
}

.author-role {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== PRICING SECTION ===== */
.pricing {
    background: linear-gradient(135deg, #F0FDF4 0%, #D1FAE5 100%);
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 48px;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.pricing-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary);
    color: white;
    padding: 8px 24px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 2px solid var(--border-color);
}

.pricing-header h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
    margin-bottom: 12px;
}

.price-currency {
    font-size: 32px;
    font-weight: 600;
    color: var(--text-muted);
}

.price-amount {
    font-size: 72px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.price-description {
    color: var(--text-muted);
    font-size: 16px;
}

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

.features-intro {
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.6;
}

.pricing-list {
    list-style: none;
}

.pricing-list li {
    padding: 12px 0;
    color: var(--text-primary);
    font-size: 16px;
}

.pricing-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ===== FAQ SECTION ===== */
.faq {
    background: var(--card-bg);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    padding: 24px;
    background: var(--background);
    border-radius: var(--card-radius);
}

.faq-question {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.faq-answer {
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-tagline {
    margin-top: 16px;
    color: #9CA3AF;
    font-size: 15px;
    line-height: 1.6;
    max-width: 300px;
}

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
    color: #9CA3AF;
    transition: all 0.2s;
}

.social-link:hover {
    background: rgba(255,255,255,0.2);
    color: white;
}

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

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: white;
}

.footer-column a {
    display: block;
    color: #9CA3AF;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.2s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    color: #9CA3AF;
    font-size: 14px;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .nav-desktop {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 20px;
    }
    
    .auth-buttons {
        display: none;
    }
    
    .hero {
        padding: 60px 20px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .section-subtitle {
        font-size: 16px;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
    
    .audience-grid {
        grid-template-columns: 1fr;
    }
    
    .tracks-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .pricing-card {
        padding: 32px 24px;
    }
    
    .price-amount {
        font-size: 56px;
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 16px;
    }
    
    .logo-image {
        height: 40px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .btn-large {
        padding: 14px 32px;
        font-size: 16px;
    }
}