:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --background-color: #F2F2F7;
    --text-color: #1C1C1E;
    --white: #FFFFFF;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

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

nav a {
    text-decoration: none;
    color: var(--text-color);
    margin-left: 20px;
    font-weight: 500;
    transition: color 0.3s;
}

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

nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white) !important;
    padding: 8px 20px;
    border-radius: 20px;
}

.language-control {
    position: relative;
    margin-left: 8px;
}

.btn-language {
    background: transparent;
    border: 1px solid rgba(28, 28, 30, 0.2);
    color: var(--text-color);
    border-radius: 20px;
    padding: 8px 14px;
    font-weight: 600;
    cursor: pointer;
}

.language-menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--white);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
    z-index: 1001;
}

.language-menu.open {
    display: block;
}

#language-select {
    min-width: 180px;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid rgba(28, 28, 30, 0.2);
    background: var(--white);
    color: var(--text-color);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #E5E5EA 0%, #FFFFFF 100%);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    font-weight: 800;
}

.subtitle {
    font-size: 1.25rem;
    color: #3A3A3C;
    margin-bottom: 30px;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.mockup {
    max-width: 320px;
    border-radius: 40px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border: 8px solid #000;
}

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

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

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

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

.feature-card {
    padding: 30px;
    background: var(--background-color);
    border-radius: 20px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card .icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 10px;
}

/* Screenshots */
.screenshots {
    padding: 100px 0;
    background: #000;
    color: #fff;
}

.screenshot-container {
    display: flex;
    overflow-x: auto;
    gap: 20px;
    padding: 20px 0;
    scrollbar-width: none;
}

.screenshot-container::-webkit-scrollbar {
    display: none;
}

.screenshot-container img {
    height: 500px;
    border-radius: 20px;
    box-shadow: 0 10px 20px rgba(255,255,255,0.1);
}

/* Premium */
.premium {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    text-align: center;
}

.premium-content h2 {
    font-size: 2.5rem;
    margin-bottom: 30px;
}

.premium-content ul {
    list-style: none;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    text-align: left;
}

.premium-content li {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.btn-secondary {
    display: inline-block;
    background: var(--white);
    color: var(--primary-color);
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 700;
}

/* Footer */
footer {
    padding: 60px 0;
    background-color: var(--white);
    text-align: center;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .mockup {
        max-width: 260px;
    }
    
    header nav {
        gap: 6px;
    }

    header nav a:not(.btn-primary) {
        display: none;
    }

    .btn-primary {
        padding: 7px 14px;
    }

    .btn-language {
        padding: 7px 12px;
    }
}