* {
    box-sizing: border-box;
}

:root {
    --bg: #070b16;
    --panel: #101827;
    --panel2: #151f31;
    --text: #f4f7fb;
    --muted: #909aae;
    --accent: #29d5ff;
    --accent2: #2367ff;
    --apple: #dfe5ed;
    --border: rgba(255,255,255,.08);
}

html {
    background: var(--bg);
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at 10% 0%, rgba(35,103,255,.20), transparent 35%),
        radial-gradient(circle at 95% 20%, rgba(41,213,255,.10), transparent 30%),
        var(--bg);
    color: var(--text);
}

a {
    color: inherit;
    text-decoration: none;
}

.header {
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 25px;
    font-weight: 900;
    letter-spacing: 1px;
}

.logo span {
    color: var(--accent);
}

.tagline {
    color: var(--muted);
    font-size: 14px;
}

main {
    max-width: 1180px;
    margin: 0 auto;
    padding: 20px 24px 70px;
}

.hero {
    padding: 80px 0 90px;
    max-width: 850px;
}

.badge {
    display: inline-block;
    padding: 9px 14px;
    border: 1px solid rgba(41,213,255,.3);
    background: rgba(41,213,255,.08);
    color: #7ee9ff;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .5px;
}

.apple-badge {
    color: #f3f5f8;
    border-color: rgba(255,255,255,.18);
    background: rgba(255,255,255,.07);
}

h1 {
    font-size: clamp(42px, 8vw, 82px);
    line-height: .98;
    margin: 26px 0;
    letter-spacing: -3px;
}

.hero p,
.lead {
    color: var(--muted);
    line-height: 1.65;
    font-size: 18px;
    max-width: 720px;
}

.products h2,
.advantages h2,
.info-card h2 {
    font-size: 30px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.product {
    min-height: 330px;
    padding: 32px;
    border-radius: 26px;
    border: 1px solid var(--border);
    background: var(--panel);
    display: flex;
    flex-direction: column;
    transition: .2s ease;
}

.product:hover {
    transform: translateY(-3px);
    border-color: rgba(41,213,255,.35);
}

.product.steam {
    background:
        radial-gradient(circle at 90% 10%, rgba(41,213,255,.22), transparent 35%),
        linear-gradient(145deg, #101b2b, #08111e);
}

.product.apple {
    background:
        radial-gradient(circle at 90% 10%, rgba(255,255,255,.12), transparent 35%),
        linear-gradient(145deg, #171b22, #0a0d12);
}

.product-top {
    color: var(--accent);
    font-size: 14px;
    font-weight: 900;
    letter-spacing: 2px;
}

.apple .product-top {
    color: var(--apple);
}

.product-title {
    margin-top: 35px;
    font-size: 32px;
    font-weight: 900;
}

.product-text {
    color: var(--muted);
    line-height: 1.6;
    margin-top: 14px;
}

.product-button {
    margin-top: auto;
    padding-top: 30px;
    font-weight: 800;
}

.advantages {
    padding: 90px 0 20px;
}

.steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.step {
    padding: 24px;
    border-radius: 20px;
    background: var(--panel);
    border: 1px solid var(--border);
}

.step strong {
    display: block;
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 18px;
}

.step span {
    color: #c4cad5;
    line-height: 1.4;
}

.product-page {
    max-width: 820px;
    margin: 30px auto 60px;
}

.product-page h1 {
    font-size: clamp(40px, 8vw, 68px);
}

.product-brand {
    margin-top: 45px;
    font-size: 15px;
    font-weight: 900;
    letter-spacing: 3px;
}

.steam-brand {
    color: var(--accent);
}

.apple-brand {
    color: #e8ebf0;
}

.order-card,
.info-card,
.warning-card {
    margin-top: 28px;
    padding: 28px;
    background: rgba(16,24,39,.92);
    border: 1px solid var(--border);
    border-radius: 24px;
}

.order-card label {
    display: block;
    margin: 18px 0 9px;
    color: #b7c0d0;
    font-weight: 700;
}

.order-card input {
    width: 100%;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 14px;
    background: #0a101c;
    color: white;
    padding: 17px;
    font-size: 17px;
}

.amount-input {
    position: relative;
}

.amount-input span {
    position: absolute;
    right: 18px;
    top: 15px;
    color: var(--muted);
    font-size: 20px;
}

.hint {
    color: var(--muted);
    font-size: 13px;
    margin: 10px 0 20px;
}

.primary-button {
    width: 100%;
    border: 0;
    border-radius: 15px;
    padding: 18px 20px;
    font-size: 17px;
    font-weight: 900;
    color: white;
    background: linear-gradient(90deg, var(--accent2), var(--accent));
}

.primary-button:disabled {
    opacity: .55;
}

.info-card p {
    color: #b6bfce;
    line-height: 1.65;
}

.warning-card {
    color: #ffd98e;
    line-height: 1.55;
    border-color: rgba(255,193,80,.2);
    background: rgba(255,177,48,.06);
}

.denominations {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 30px;
}

.denom {
    padding: 25px;
    text-align: center;
    border-radius: 18px;
    background: var(--panel2);
    border: 1px solid var(--border);
    font-size: 22px;
    font-weight: 900;
}

footer {
    max-width: 1180px;
    margin: 0 auto;
    padding: 30px 24px 50px;
    color: var(--muted);
    border-top: 1px solid var(--border);
}

.footer-small {
    margin-top: 8px;
    font-size: 12px;
}

@media (max-width: 720px) {
    .header {
        padding: 22px 18px;
    }

    .tagline {
        display: none;
    }

    main {
        padding: 10px 18px 50px;
    }

    .hero {
        padding: 55px 0 65px;
    }

    h1 {
        letter-spacing: -2px;
    }

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

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

    .product {
        min-height: 285px;
    }

    .order-card,
    .info-card,
    .warning-card {
        padding: 21px;
    }
}