:root {
    color-scheme: light dark;
    --ink: #1d1d1f;
    --paper: #f5f5f7;
    --line: #c7c7cc;
    --accent: #0a5bd3;
    --error: #b3261e;
}

@media (prefers-color-scheme: dark) {
    :root {
        --ink: #f2f2f7;
        --paper: #1c1c1e;
        --line: #48484a;
        --accent: #5e9bff;
        --error: #ff8a80;
    }
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: var(--paper);
    color: var(--ink);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main { width: min(24rem, 100% - 2rem); padding: 2rem 0; }
.brand { display: flex; align-items: center; gap: 0.6rem; margin: 0 0 1.75rem; font-size: 1.15rem; font-weight: 650; }
.brand img { width: 2rem; height: 2rem; }
h1 { font-size: 1.5rem; margin: 0 0 0.25rem; }
.host { margin: 0 0 1.5rem; opacity: 0.7; }
form { display: grid; gap: 0.5rem; }
label { font-weight: 600; margin-top: 0.5rem; }

input {
    font: inherit;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: transparent;
    color: inherit;
}

input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.check { display: flex; align-items: center; gap: 0.5rem; font-weight: 400; }
.check input { margin: 0; width: 1.1rem; height: 1.1rem; }

button {
    font: inherit;
    margin-top: 1rem;
    padding: 0.7rem;
    border: 0;
    border-radius: 6px;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
}

.hint { margin: 0; font-size: 0.875rem; opacity: 0.7; }
.error { color: var(--error); font-weight: 600; }
a { color: var(--accent); }
/* The QR is drawn black on transparent, so it gets a white field and a quiet zone in dark mode too. */
.qr svg { display: block; margin: 0 auto; padding: 0.5rem; background: #fff; border-radius: 6px; }
.secret { text-align: center; word-spacing: 0.25rem; }
.codes { columns: 2; padding-left: 1.25rem; }
.lang { margin-top: 2rem; font-size: 0.875rem; text-align: center; }
.lang form { display: block; }
.lang span { opacity: 0.5; }
.lang button { margin: 0; padding: 0.25rem; background: none; color: var(--accent); text-decoration: underline; }
.lang button[aria-pressed="true"] { color: inherit; text-decoration: none; font-weight: 600; cursor: default; }