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

body {
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
    background: #f8f9fb;
    color: #111;
}

nav {
    position: fixed;
    top: 0;
    left: 0;

    width: 100%;
    height: 64px;

    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 0 32px;

    box-shadow: 0 2px 12px rgba(0,0,0,.05);
    z-index: 100;
}

nav a {
    text-decoration: none;
    color: #111;
    font-size: 15px;
    font-weight: 600;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 120px 20px 80px;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
}

h1 {
    font-size: 96px;
    font-weight: 800;
    text-align: center;
}

.subtitle {
    text-align: center;
    font-size: 28px;
    margin-top: 20px;
    color: #444;
}

.description {
    text-align: center;
    max-width: 700px;
    margin: 30px auto 0;
    font-size: 20px;
    line-height: 1.8;
    color: #666;
}

.cards {
    margin-top: 80px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.card {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,.05);
    transition: .3s;
}

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

.card h3 {
    margin-bottom: 15px;
    font-size: 24px;
}

.card p {
    color: #666;
    line-height: 1.6;
}

.page {
    padding: 150px 20px 80px;
    text-align: center;
}

@media (max-width: 768px) {
    nav {
        gap: 18px;
        font-size: 14px;
        overflow-x: auto;
    }

    h1 {
        font-size: 56px;
    }

    .subtitle {
        font-size: 22px;
    }

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

.logo {
    font-size: 24px;
    font-weight: 800;
}

.menu {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    flex: 1;
}

.app-link a {
    background: #111;
    color: white;
    padding: 10px 18px;
    border-radius: 999px;
    font-size: 14px;
}

.main-slider {
    margin-top: 64px;
    width: 100%;
    overflow: hidden;
    background: #f8f9fb;
}

.slider-track {
    display: flex;
    transition: transform 0.8s ease;
}

.slide {
    min-width: 25%;
    height: 420px;
    background: #ddd;
    display: flex;
    align-items: flex-end;
    padding: 32px;
    font-size: 32px;
    font-weight: 800;
}

.slide:nth-child(odd) {
    background: #e5e5e5;
}

.slide:nth-child(even) {
    background: #d8d8d8;
}

@media (max-width: 768px) {
    .slide {
        min-width: 100%;
        height: 360px;
    }
}