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

:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #3B82F6;
    --dark: #1E293B;
    --dark-light: #334155;
    --light: #F8FAFC;
    --white: #FFFFFF;
    --accent: #F97316;
    --accent-hover: #EA580C;
    --gray: #64748B;
    --gray-light: #E2E8F0;
    --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);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--white);
    color: var(--dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.btn-lg {
    padding: 18px 36px;
    font-size: 1.125rem;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav-cta {
    padding: 10px 20px;
    font-size: 0.9rem;
}

.hero {
    background: linear-gradient(180deg, var(--light) 0%, var(--white) 100%);
    padding: 60px 0 100px;
}

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

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--dark);
    margin-bottom: 24px;
}

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

.phone-mockup {
    perspective: 1000px;
}

.phone-screen {
    background: var(--dark);
    border-radius: 32px;
    padding: 8px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    transform: rotateY(-15deg) rotateX(5deg);
    transition: var(--transition);
}

.phone-mockup:hover .phone-screen {
    transform: rotateY(0) rotateX(0);
}

.app-preview {
    background: var(--white);
    border-radius: 24px;
    padding: 24px;
    min-height: 500px;
    width: 280px;
}

.app-header {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 20px;
    text-align: center;
}

.app-stats {
    display: flex;
    justify-content: space-around;
    background: var(--light);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 24px;
}

.stat {
    text-align: center;
}

.stat span {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat small {
    color: var(--gray);
    font-size: 0.75rem;
}

.app-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.list-item {
    background: var(--light);
    border-radius: var(--radius-sm);
    padding: 16px;
    font-size: 0.9rem;
    border-left: 3px solid var(--primary);
}

.features {
    padding: 100px 0;
    background: var(--white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--dark);
}

.feature-card p {
    color: var(--gray);
    font-size: 0.95rem;
}

.screenshots {
    padding: 100px 0;
    background: var(--light);
}

.screenshots-carousel {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.carousel-track {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-padding: 0 24px;
    padding: 20px 0;
    scrollbar-width: none;
}

.carousel-track::-webkit-scrollbar {
    display: none;
}

.slide {
    flex: 0 0 calc(50% - 12px);
    scroll-snap-align: start;
}

@media (min-width: 768px) {
    .slide {
        flex: 0 0 calc(25% - 18px);
    }
}

.phone-frame {
    background: var(--dark);
    border-radius: 28px;
    padding: 8px;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 9 / 19;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.screen-image {
    flex: 1;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    background: var(--white);
    border-radius: 20px;
    display: block;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--white);
    border: 1px solid var(--gray-light);
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 10;
}

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

.carousel-btn.prev { left: -24px; }
.carousel-btn.next { right: -24px; }

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.carousel-dots button {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: none;
    background: var(--gray-light);
    cursor: pointer;
    transition: var(--transition);
}

.carousel-dots button.active {
    background: var(--primary);
    width: 24px;
    border-radius: 5px;
}

.testimonials {
    padding: 100px 0;
    background: var(--white);
}

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

.testimonial-card {
    background: var(--light);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
}

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

.stars {
    color: #FBBF24;
    font-size: 1.25rem;
    margin-bottom: 16px;
}

.testimonial-card p {
    color: var(--dark-light);
    margin-bottom: 20px;
    font-style: italic;
}

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

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1rem;
}

.author strong {
    display: block;
    color: var(--dark);
}

.author span {
    font-size: 0.85rem;
    color: var(--gray);
}

.cta-final {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    text-align: center;
    color: var(--white);
}

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

.cta-final p {
    font-size: 1.125rem;
    color: #94A3B8;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 40px;
}

.social-links a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

.footer {
    background: var(--dark);
    color: var(--gray);
    padding: 32px 0;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--gray);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    backdrop-filter: blur(4px);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    max-width: 400px;
    width: 100%;
    text-align: center;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: var(--transition);
}

.modal.show .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--gray-light);
    color: var(--gray);
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--primary);
    color: var(--white);
}

.modal-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.modal-content p {
    color: var(--gray);
    margin-bottom: 24px;
}

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

    .hero-text p {
        margin-left: auto;
        margin-right: auto;
    }

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

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

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

    .phone-mockup {
        max-width: 320px;
        margin: 0 auto;
    }
}

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

    .hero {
        padding: 40px 0 80px;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-text p {
        font-size: 1.1rem;
    }

    .features, .screenshots, .testimonials, .cta-final {
        padding: 60px 0;
    }

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

    .section-header h2 {
        font-size: 2rem;
    }

    .cta-final h2 {
        font-size: 2rem;
    }

    .carousel-btn {
        display: none;
    }
}