/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #2563eb;
    --primary-orange: #f97316;
    --dark-blue: #1e40af;
    --light-blue: #dbeafe;
    --green: #10b981;
    --light-green: #d1fae5;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-blue);
    border-radius: 2px;
}

.btn-primary-small {
    background: var(--primary-blue);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s;
}

.btn-primary-small:hover {
    background: var(--dark-blue);
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

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

.hero-text h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.hero-benefits {
    margin: 2rem 0;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.125rem;
    color: var(--gray-700);
}

.check {
    font-size: 1.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-primary {
    background: var(--primary-blue);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-secondary {
    background: var(--white);
    color: var(--primary-blue);
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    border: 2px solid var(--primary-blue);
    transition: all 0.3s;
    display: inline-block;
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-android {
    background: #3DDC84;
    /* Android Green */
    color: #073042;
    /* Android Dark Blue */
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.125rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    border: none;
}

.btn-android:hover {
    background: #32b86c;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-iphone {
    background: #000000;
    /* Apple Black */
    color: #ffffff;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.125rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    border: none;
}

.btn-iphone:hover {
    background: #1a1a1a;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-iphone-small {
    background: #000000;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn-iphone-small:hover {
    background: #1a1a1a;
    transform: translateY(-2px);
}

.btn-android-small {
    background: #3DDC84;
    color: #073042;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.btn-android-small:hover {
    background: #32b86c;
    transform: translateY(-2px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    max-width: 350px;
    border-radius: 2rem;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    background: var(--gray-900);
    padding: 1rem;
}

.phone-mockup img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 1.5rem;
}

/* Problem Section */
.problem {
    padding: 5rem 0;
    background: var(--white);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    text-align: center;
    color: var(--gray-900);
    margin-bottom: 3rem;
}

.problem-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.problem-card {
    background: var(--gray-50);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 2px solid var(--gray-200);
    transition: all 0.3s;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-orange);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.problem-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.problem-card p {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.problem-loss {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-orange);
    margin-top: 1rem;
}

/* Solution Section */
.solution {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
}

.solution-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.solution-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.solution-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.solution-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
}

.solution-image {
    margin-top: 1.5rem;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.solution-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* Formats Section */
.formats {
    padding: 5rem 0;
    background: var(--white);
}

.section-subtitle {
    text-align: center;
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 3rem;
}

.format-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.format-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 1.5rem;
    border: 2px solid var(--gray-200);
    text-align: center;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}

.format-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
}

.format-icon-large {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.format-card h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.format-for {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.format-benefits {
    list-style: none;
    text-align: left;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.format-benefits li {
    padding: 0.5rem 0;
    color: var(--gray-700);
    font-size: 1rem;
}

.format-details {
    text-align: left;
    margin: 1.5rem 0;
    padding: 1rem;
    background: var(--gray-50);
    border-radius: 0.5rem;
}

.format-details ul {
    list-style: none;
    margin-top: 0.5rem;
}

.format-details li {
    padding: 0.25rem 0;
    color: var(--gray-600);
}

.format-button {
    background: var(--primary-blue);
    color: var(--white);
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s;
    margin-top: auto;
}

.format-button:hover {
    background: var(--dark-blue);
    transform: translateY(-2px);
}

.format-help {
    background: linear-gradient(135deg, var(--light-blue) 0%, var(--light-green) 100%);
    padding: 3rem;
    border-radius: 1.5rem;
    text-align: center;
    margin-top: 3rem;
}

.format-help-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.format-help h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.format-help p {
    color: var(--gray-700);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.format-help-note {
    font-weight: 600;
    margin-top: 1.5rem;
}

.format-help-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.format-help-features span {
    background: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
}

/* Demo Section */
.demo {
    padding: 5rem 0;
    background: var(--gray-50);
}

.demo-videos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.demo-video-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.demo-video-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
    text-align: center;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
    padding-bottom: 177.78%;
    /* 9:16 aspect ratio (вертикальный формат телефона) */
    margin-bottom: 1rem;
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--gray-900);
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.demo-video-card p {
    color: var(--gray-600);
    text-align: center;
    font-size: 1rem;
}

.demo-note {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow);
}

.demo-note p {
    color: var(--gray-700);
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.demo-question {
    font-weight: 600;
    margin: 1rem 0;
}

/* How It Works Section */
.how-it-works {
    padding: 5rem 0;
    background: var(--white);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.step {
    text-align: center;
    padding: 2rem;
}

.step-number {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.step h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.step p {
    color: var(--gray-600);
    font-size: 1.125rem;
    line-height: 1.8;
}

/* Features Section */
.features {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-blue);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 1rem;
}

/* CTA Section */
.cta {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
}

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

.cta-text h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--white);
}

.cta-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-benefits {
    margin: 2rem 0;
}

.cta-benefit {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    opacity: 0.95;
}

.cta-note {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0;
}

.btn-primary-large {
    background: var(--white);
    color: var(--primary-blue);
    padding: 1.25rem 2.5rem;
    border-radius: 0.75rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    display: inline-block;
    transition: all 0.3s;
    margin-top: 1rem;
}

.btn-primary-large:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: var(--gray-50);
}

.cta-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 3rem 0 1.5rem;
}

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

.footer-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.footer-info p {
    opacity: 0.8;
}

.footer-contact h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-link {
    color: var(--white);
    text-decoration: none;
    font-size: 1.125rem;
    transition: opacity 0.3s;
}

.footer-link:hover {
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all 0.3s;
}

/* Responsive Design */
@media (max-width: 968px) {

    .hero-content,
    .cta-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-text {
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.25rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .demo-videos {
        grid-template-columns: 1fr;
    }

    .video-container {
        max-width: 300px;
    }

    .format-cards {
        grid-template-columns: 1fr;
    }

    .solution-cards {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* Мобильная версия */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
    }

    .hero-text {
        text-align: center;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons a {
        width: 100%;
        text-align: center;
    }

    .format-cards,
    .demo-videos,
    .solution-cards {
        flex-direction: column;
    }

    .phone-mockup {
        max-width: 100%;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: left 0.3s ease;
        z-index: 999;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links a {
        padding: 1rem;
        border-bottom: 1px solid var(--gray-200);
        width: 100%;
    }
}

@media (max-width: 640px) {
    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .hero-text h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons a {
        width: 100%;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .problem-cards,
    .solution-cards,
    .steps,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .phone-mockup {
        max-width: 280px;
    }

    .video-container {
        max-width: 280px;
    }

    .container {
        padding: 0 15px;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.hero-text,
.hero-image,
.problem-card,
.solution-card,
.format-card,
.feature-card {
    animation: fadeInUp 0.6s ease-out;
}