:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --ok: #15803d;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --card: #111a2e;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --line: #243049;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --danger: #f87171;
    --ok: #4ade80;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.card {
  width: 100%;
  max-width: 400px;
  padding: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
}

.card.wide { max-width: 640px; }

.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.brand svg { width: 40px; height: 40px; flex: none; }
.brand h1 { margin: 0; font-size: 20px; line-height: 1.2; }
.brand p { margin: 2px 0 0; font-size: 13px; color: var(--muted); }

.tabs { display: flex; gap: 4px; padding: 4px; margin-bottom: 20px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; }
.tabs button { flex: 1; padding: 8px; border: 0; border-radius: 7px; background: transparent; color: var(--muted); font: inherit; font-weight: 500; cursor: pointer; }
.tabs button[aria-selected="true"] { background: var(--card); color: var(--text); box-shadow: 0 1px 3px rgba(15, 23, 42, 0.12); }

label { display: block; margin-bottom: 14px; font-size: 14px; font-weight: 500; }
label span { color: var(--muted); font-weight: 400; }

input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

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

.btn {
  width: 100%;
  padding: 11px 14px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.btn:hover { background: var(--accent-hover); }
.btn:disabled { opacity: 0.6; cursor: wait; }
.btn.ghost { width: auto; padding: 6px 12px; background: transparent; color: var(--muted); border: 1px solid var(--line); font-weight: 500; }
.btn.ghost:hover { color: var(--text); background: transparent; }
.btn.danger { width: auto; padding: 4px 10px; background: transparent; color: var(--danger); border: 1px solid var(--line); font-weight: 500; font-size: 13px; }

.error { margin: 0 0 14px; color: var(--danger); font-size: 14px; }
.hint { margin: 16px 0 0; color: var(--muted); font-size: 13px; }

.done { padding: 16px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg); }
.done strong { display: block; margin-bottom: 4px; color: var(--ok); }
.done p { margin: 0; color: var(--muted); font-size: 14px; }

.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.row .brand { margin: 0; }
h2 { margin: 24px 0 12px; font-size: 16px; }
.list { margin: 0; padding: 0; list-style: none; border: 1px solid var(--line); border-radius: 10px; }
.list li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 12px; }
.list li + li { border-top: 1px solid var(--line); }
.list small { display: block; color: var(--muted); }
.empty { padding: 14px; color: var(--muted); font-size: 14px; text-align: center; }
[hidden] { display: none !important; }