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

body {
    font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    color: #222;
    line-height: 1.6;
}

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

.header {
    background: #fff;
    border-bottom: 1px solid #eee;
    position: sticky;
    top: 0;
    z-index: 10;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-weight: 700;
    font-size: 20px;
    color: #222;
    text-decoration: none;
}

.nav a {
    color: #444;
    text-decoration: none;
    margin-left: 24px;
    font-size: 15px;
}

.nav a:hover {
    color: #0066ff;
}

.hero {
    background: linear-gradient(135deg, #0066ff, #00c2ff);
    color: #fff;
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 16px;
}

.hero p {
    font-size: 18px;
    margin-bottom: 32px;
    opacity: 0.95;
}

.btn {
    background: #fff;
    color: #0066ff;
    border: none;
    padding: 14px 32px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
}

.section {
    padding: 64px 0;
}

.section--alt {
    background: #f7f9fc;
}

.section h2 {
    font-size: 28px;
    margin-bottom: 16px;
}

.footer {
    background: #222;
    color: #ccc;
    text-align: center;
    padding: 24px 0;
    font-size: 14px;
}