:root { --bg: #f6f7f9; --card: #ffffff; --text: #1a2230; --muted: #526077; --line: #d5dbe5; --accent: #1f4fa3; --accent-text: #ffffff; --bad: #a3231f; }
@media (prefers-color-scheme: dark) { :root { --bg: #11161f; --card: #1a212d; --text: #e8edf5; --muted: #a2afc4; --line: #2c3647; --accent: #7aa6f0; --accent-text: #0c1320; --bad: #ff8a84; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, "Segoe UI", Tahoma, sans-serif; }
.bar { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { font-weight: 700; }
main { max-width: 560px; margin: 0 auto; padding: 24px 16px 8px; }
h1 { font-size: 1.6rem; margin: 0 0 8px; } h2 { font-size: 1.1rem; margin: 0 0 12px; }
.lead { color: var(--muted); margin-top: 0; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin: 16px 0; }
label { display: block; margin: 12px 0 4px; font-weight: 600; }
input { width: 100%; padding: 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text); font: inherit; }
button, .linkbtn { display: inline-block; margin-top: 16px; padding: 10px 18px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--text); font: inherit; cursor: pointer; text-decoration: none; }
.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.lang { margin: 0; padding: 6px 12px; }
button:disabled { opacity: .6; cursor: default; }
.status { min-height: 1.5em; color: var(--muted); } .status.bad { color: var(--bad); }
dl { margin: 0; } dt { font-weight: 600; margin-top: 8px; } dd { margin: 0; word-break: break-all; }
.mono { font-family: ui-monospace, Consolas, monospace; font-size: .85rem; }
footer { max-width: 560px; margin: 0 auto; padding: 8px 16px 32px; color: var(--muted); font-size: .9rem; }
[hidden] { display: none !important; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
@media (max-width: 480px) { main { padding-top: 16px; } }