:root {
    --bg: #1C2450;
    --card: #2C3568;
    --card-lip: #1B2249;
    --gold: #FFB020;
    --gold-light: #FFD066;
    --gold-lip: #C4740A;
    --green: #4BC34B;
    --green-lip: #2C8A2C;
    --text: #FFFFFF;
    --dim: #B4BCE4;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
    background-size: 48px 48px;
    color: var(--text);
    font-family: Vazirmatn, "Yekan Bakh", Tahoma, sans-serif;
    direction: rtl;
    text-align: center;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 28px 20px 48px;
}

.logo { width: min(320px, 76vw); height: auto; }

h1 { font-size: 26px; margin: 22px 0 6px; }

p { color: var(--dim); line-height: 2; margin: 6px 0; max-width: 520px; }

.card {
    background: var(--card);
    border-bottom: 8px solid var(--card-lip);
    border-radius: 30px;
    padding: 26px 22px 30px;
    margin-top: 26px;
    width: min(520px, 100%);
}

.code {
    background: var(--gold-light);
    color: #7A4E00;
    border-bottom: 6px solid var(--gold-lip);
    border-radius: 22px;
    font-size: 34px;
    font-weight: 800;
    letter-spacing: .3em;
    padding: 16px 10px 20px;
    margin: 16px 0;
}

.btn {
    display: block;
    text-decoration: none;
    font-weight: 800;
    font-size: 19px;
    color: #fff;
    background: var(--green);
    border-bottom: 8px solid var(--green-lip);
    border-radius: 26px;
    padding: 15px 20px 19px;
    margin-top: 12px;
    transition: transform .06s;
}
.btn:active { transform: translateY(4px); border-bottom-width: 4px; }
.btn.gold { background: var(--gold); border-bottom-color: var(--gold-lip); color: #4A2C00; }

.muted { color: var(--dim); font-size: 13px; margin-top: 18px; }

footer { margin-top: 34px; color: var(--dim); font-size: 12px; }