:root {
    color-scheme: dark;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #0b0e11;
    color: #edf2ef;
}

* { box-sizing: border-box; }

body {
    min-height: 100vh;
    margin: 0;
    display: grid;
    place-items: center;
    padding: 24px;
    background: radial-gradient(circle at 50% 15%, #17251f 0, #0b0e11 42%);
}

.panel {
    width: min(100%, 390px);
    padding: 36px;
    border: 1px solid #27312c;
    border-radius: 18px;
    background: #121715;
    box-shadow: 0 24px 80px #0008;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: .08em;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #48d68a;
    box-shadow: 0 0 18px #48d68a66;
}

.subtitle { margin: 12px 0 30px; color: #96a39c; line-height: 1.5; }
.error { padding: 12px; border-radius: 9px; background: #472327; color: #ffb4b4; }

form { display: grid; gap: 12px; }
label { margin-top: 8px; color: #b9c4bd; font-size: 14px; }

input {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid #344039;
    border-radius: 9px;
    outline: none;
    background: #0c100e;
    color: #edf2ef;
    font: inherit;
}

input:focus { border-color: #48d68a; box-shadow: 0 0 0 3px #48d68a1f; }
.code { text-align: center; font-size: 26px; letter-spacing: .3em; }

button {
    margin-top: 14px;
    padding: 13px 18px;
    border: 0;
    border-radius: 9px;
    background: #48d68a;
    color: #07150e;
    font: 600 16px inherit;
    cursor: pointer;
}

button:hover { background: #65e39e; }
.hint { margin: 24px 0 0; color: #77857d; font-size: 13px; line-height: 1.5; }

@media (max-width: 480px) {
    .panel { padding: 28px 22px; }
}