* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #081120, #142b4d, #1d4ed8);
    color: #ffffff;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(16px, 4vw, 48px) clamp(14px, 3vw, 20px);
}

.card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 18px;
    padding: clamp(16px, 3vw, 24px);
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

h1 {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    line-height: 1.2;
    margin-top: 0;
}

h2 {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    margin-top: 0;
}

p,
li {
    font-size: clamp(0.95rem, 2vw, 1rem);
}

.buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 16px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 12px 18px;
    border-radius: 10px;
    background: #22c55e;
    color: #081120;
    text-decoration: none;
    font-weight: bold;
    text-align: center;
}

.btn.secondary {
    background: #e2e8f0;
}

ol,
ul {
    line-height: 1.8;
    padding-left: 20px;
}

code {
    background: rgba(0, 0, 0, 0.25);
    padding: 2px 6px;
    border-radius: 6px;
    word-break: break-word;
}

@media (max-width: 768px) {
    .container {
        padding: 20px 14px;
    }

    .card {
        border-radius: 14px;
    }
}

@media (max-width: 480px) {
    .buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    ol,
    ul {
        padding-left: 18px;
    }
}