:root {
    color-scheme: dark;
    font-family: Arial, Helvetica, sans-serif;
    background: #121212;
    color: #fff;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    min-height: 100svh;
    display: grid;
    place-items: center;
    padding: 40px 16px;
    background: linear-gradient(180deg, #242424 0%, #121212 45%);
}

.container {
    width: 100%;
    max-width: 480px;
    padding: 48px 40px 32px;
    text-align: center;
    background: #121212;
    border: 1px solid #292929;
    border-radius: 12px;
    box-shadow: 0 24px 64px #0005;
}

.container::before {
    content: '';
    display: block;
    width: 40px;
    height: 6px;
    margin: 0 auto 28px;
    background: #1ed760;
    border-radius: 999px;
}

h1 {
    margin: 0 0 16px;
    font-size: clamp(26px, 5vw, 32px);
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1.15;
}

p {
    margin: 0 0 28px;
    color: #b3b3b3;
    font-size: 16px;
    line-height: 1.6;
}

.h-captcha {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
}

button {
    width: 100%;
    min-height: 48px;
    padding: 14px 24px;
    border: 0;
    border-radius: 999px;
    background: #1ed760;
    color: #000;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 150ms ease, transform 150ms ease;
}

button:hover { background: #3be477; transform: scale(1.02); }
button:active { background: #1db954; transform: scale(1); }
button:focus-visible, a:focus-visible { outline: 3px solid #fff; outline-offset: 5px; }

footer {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #292929;
}

footer p { margin: 0; font-size: 12px; line-height: 1.6; }
footer a { color: #fff; text-underline-offset: 3px; }
footer a:hover { color: #1ed760; }

@media (max-width: 400px) {
    body { padding: 24px 8px; }
    .container { padding: 32px 8px 24px; }
    h1, .container > p, footer { margin-left: 12px; margin-right: 12px; }
    button { width: calc(100% - 24px); }
}

@media (prefers-reduced-motion: reduce) {
    button { transition: none; }
}