:root {
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --bg-primary: #fbfbfd;
    --bg-secondary: #f5f5f7;
    --blue: #0071e3;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
    --radius-lg: 24px;
    --radius-md: 18px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f5f5f7;
        --text-secondary: #86868b;
        --bg-primary: #000000;
        --bg-secondary: #1c1c1e;
        --blue: #2997ff;
        --glass-bg: rgba(28, 28, 30, 0.7);
        --glass-border: rgba(255, 255, 255, 0.15);
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.47059;
    letter-spacing: -0.022em;
    -webkit-font-smoothing: antialiased;
}

/* Navigation - Glassmorphic */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: 48px;
    background: var(--glass-bg);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 9999;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 max(20px, env(safe-area-inset-left));
}

.nav-content {
    max-width: 980px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-logo {
    height: 24px;
    width: auto;
    border-radius: 6px;
}

.nav-links {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 12px;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.nav-links a:hover {
    opacity: 1;
}

.nav-download {
    background: var(--text-primary);
    color: var(--bg-primary) !important;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* Hero Section */
.hero {
    padding: 120px 20px 60px;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero h1 {
    font-size: clamp(40px, 8vw, 64px);
    line-height: 1.05;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin-bottom: 20px;
}

.hero p {
    font-size: clamp(19px, 4vw, 24px);
    color: var(--text-secondary);
    line-height: 1.381002381;
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto 30px;
}

.cta-button {
    display: inline-block;
    background: var(--blue);
    color: #fff;
    padding: 14px 28px;
    border-radius: 980px;
    font-size: 17px;
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s, background 0.2s;
}

.cta-button:hover {
    transform: scale(1.02);
    background: #0077ED;
}

/* App Screenshots Row */
.carousel-section {
    position: relative;
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: all 0.2s;
}

.carousel-btn:hover {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

.scroller-container {
    width: 100%;
    overflow-x: auto;
    padding: 40px 20px; /* Increase padding for scale effects */
    display: flex;
    gap: 30px; /* Adjust gap to handle scaled images */
    scrollbar-width: none; /* Firefox */
    will-change: scroll-position;
}

.scroller-container::-webkit-scrollbar {
    display: none; /* Safari and Chrome */
}

.device-mockup {
    flex: 0 0 auto;
    width: 250px;
    border-radius: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    overflow: hidden;
    position: relative;
    background: var(--bg-secondary);
    will-change: transform, filter, opacity;
    /* Transformation logic handled by JS */
}

@media (min-width: 768px) {
    .scroller-container {
        justify-content: flex-start;
    }
}

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

.device-mockup img {
    width: 100%;
    height: auto;
    display: block;
}

/* Features List */
.features-container {
    padding: 80px 20px;
    max-width: 1080px;
    margin: 0 auto;
}

.section-title {
    text-align: center;
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 60px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: left;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    font-size: 21px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.47;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    padding: 40px 20px;
    border-top: 1px solid var(--glass-border);
    margin-top: 60px;
}

.footer-content {
    max-width: 980px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

.lang-switcher {
    display: flex;
    gap: 12px;
}

.lang-switcher a {
    color: var(--text-secondary);
    text-decoration: none;
}

.lang-switcher a.active {
    color: var(--text-primary);
    font-weight: 600;
}