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

:root {
    --primary-color: #00BCD4;
    --primary-dark: #0097A7;
    --secondary-color: #5E35B1;
    --accent-color: #00C853;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* Language Toggle */
.lang-toggle {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 100px;
    padding: 4px;
    box-shadow: var(--shadow-md);
    display: flex;
    gap: 4px;
}

.lang-btn {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 100px;
    transition: var(--transition);
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.lang-btn:hover:not(.active) {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 188, 212, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(94, 53, 177, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(30px, -30px) rotate(5deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
    padding: 100px 0 60px;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-description {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-buttons {
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 100px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    box-shadow: 0 4px 20px rgba(0, 188, 212, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 188, 212, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-large {
    padding: 20px 40px;
    font-size: 18px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    animation: fadeInUp 0.8s ease-out 0.8s backwards;
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.app-icon-large {
    position: absolute;
    width: 120px;
    height: 120px;
    top: -40px;
    left: -40px;
    filter: drop-shadow(0 8px 24px rgba(0, 188, 212, 0.3));
    animation: floatIcon 6s ease-in-out infinite;
}

@keyframes floatIcon {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-phone {
    max-width: 400px;
    background: var(--white);
    border-radius: 32px;
    padding: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.phone-screenshot {
    width: 100%;
    border-radius: 24px;
    display: block;
}

/* Features Section */
.features {
    padding: 120px 0;
    background: var(--white);
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--text-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 20px;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 64px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
}

.feature-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-description {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.7;
}

/* Screenshots Section */
.screenshots {
    padding: 120px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    overflow: hidden;
}

.screenshots .section-title {
    color: var(--white);
    -webkit-text-fill-color: var(--white);
}

.screenshots .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.screenshots-slider {
    margin-top: 64px;
    overflow: hidden;
}

.screenshots-track {
    display: flex;
    gap: 32px;
    animation: scroll 30s linear infinite;
    width: fit-content;
}

.screenshots-track:hover {
    animation-play-state: paused;
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.screenshot-item {
    flex-shrink: 0;
    width: 300px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.screenshot-item img {
    width: 100%;
    border-radius: 12px;
    display: block;
    margin-bottom: 12px;
}

.screenshot-caption {
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
}

/* Download CTA Section */
.download-cta {
    padding: 120px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-subtitle {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 40px;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: start;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 24px;
}

.footer-left {
    max-width: 400px;
}

.footer-logo {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
}

.footer-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-title {
        font-size: 48px;
    }

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

    .hero-image {
        order: -1;
    }

    .app-icon-large {
        left: 50%;
        transform: translateX(-50%);
    }
}

@media (max-width: 768px) {
    .lang-toggle {
        top: 16px;
        right: 16px;
    }

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

    .hero-content {
        padding: 60px 0 40px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

    .hero-description {
        font-size: 16px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
        align-items: center;
    }

    .stat-item {
        text-align: center;
    }

    .hero-phone {
        max-width: 320px;
    }

    .section-title {
        font-size: 36px;
    }

    .section-subtitle {
        font-size: 18px;
    }

    .features {
        padding: 80px 0;
    }

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

    .screenshots {
        padding: 80px 0;
    }

    .download-cta {
        padding: 80px 0;
    }

    .cta-title {
        font-size: 36px;
    }

    .cta-subtitle {
        font-size: 18px;
    }

    .footer-content {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }

    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .btn {
        padding: 14px 24px;
        font-size: 14px;
    }

    .btn-large {
        padding: 16px 28px;
        font-size: 16px;
    }

    .section-title {
        font-size: 28px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .cta-title {
        font-size: 28px;
    }

    .screenshot-item {
        width: 240px;
    }
}

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

/* Selection */
::selection {
    background: var(--primary-color);
    color: var(--white);
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}