* { margin: 0; padding: 0; box-sizing: border-box; }
    :root { --blue: #00D9FF; --bg: #000; --card: #0A0A0A; --line: rgba(0,217,255,.2); }
    body { font-family: 'Montserrat', system-ui, sans-serif; background: var(--bg); color: #fff; line-height: 1.6; padding: 2rem 1rem 4rem; }
    .wrap { max-width: 760px; margin: 0 auto; }
    a { color: var(--blue); }
    .brand { font-weight: 900; font-size: 1.4rem; letter-spacing: -1px; }
    .brand span { color: var(--blue); }
    h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin: 1.5rem 0 .5rem; }
    .lock { display: inline-flex; align-items: center; gap: .5rem; font-size: .8rem; color: var(--blue); border: 1px solid var(--line); border-radius: 50px; padding: .35rem .9rem; }
    .grid { display: grid; gap: 1rem; }
    .plans { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); margin: 1.5rem 0; }
    .plan { background: var(--card); border: 2px solid #1a1a1a; border-radius: 14px; padding: 1.2rem; cursor: pointer; transition: all .2s; }
    .plan:hover { border-color: var(--line); }
    .plan.sel { border-color: var(--blue); box-shadow: 0 0 30px rgba(0,217,255,.25); }
    .plan h3 { font-size: 1rem; }
    .plan .price { font-size: 1.6rem; font-weight: 900; color: var(--blue); margin-top: .3rem; }
    .plan .per { font-size: .8rem; color: #888; }
    label { display: block; font-size: .85rem; color: #bbb; margin: 1rem 0 .35rem; }
    input { width: 100%; background: #0d0d0d; border: 1px solid #222; border-radius: 10px; padding: .8rem .9rem; color: #fff; font-size: 1rem; font-family: inherit; }
    input:focus { outline: none; border-color: var(--blue); }
    .row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
    .btn { width: 100%; margin-top: 1.5rem; background: linear-gradient(135deg, #00D9FF, #0099FF); color: #000; border: none; border-radius: 50px; padding: 1.1rem; font-weight: 800; font-size: 1rem; text-transform: uppercase; letter-spacing: .5px; cursor: pointer; transition: all .3s; }
    .btn:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,217,255,.5); }
    .btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
    .note { font-size: .8rem; color: #888; margin-top: 1.2rem; line-height: 1.7; }
    .err { color: #ff6b6b; font-size: .9rem; margin-top: .8rem; }
    .ok { background: rgba(0,217,255,.07); border: 1px solid var(--line); border-radius: 14px; padding: 1.5rem; margin-top: 1.5rem; }
    .ok h2 { color: var(--blue); font-size: 1.3rem; margin-bottom: .8rem; }
    .ok .mono { font-family: ui-monospace, monospace; font-size: .8rem; color: #9fe; word-break: break-all; background: #060606; padding: .6rem; border-radius: 8px; margin-top: .5rem; }
    .wa { display: inline-block; margin-top: 1rem; background: #25D366; color: #042; font-weight: 800; padding: .9rem 1.6rem; border-radius: 50px; text-decoration: none; }
    .hide { display: none; }
    a:focus-visible, button:focus-visible, .plan:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
    input:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-color: var(--blue); }