:root {
  --ink: #0f1720;
  --muted: #5b6772;
  --line: #e3e8ee;
  --accent: #0b5fff;
  --accent-ink: #ffffff;
  --danger: #b3261e;
  --bg: #f6f8fa;
  --card: #ffffff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
}
.shell { max-width: 620px; margin: 0 auto; padding: 32px 16px 64px; }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.brand { display: flex; align-items: baseline; gap: 10px; margin-bottom: 20px; }
.brand-name { font-size: 22px; font-weight: 700; letter-spacing: -0.02em; }
.brand-sub { font-size: 14px; color: var(--muted); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(15, 23, 32, 0.04);
}
h1 { font-size: 20px; margin: 0 0 8px; }
h2 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 20px 0 10px; }
label { display: block; font-size: 14px; font-weight: 500; margin-bottom: 12px; }
input, textarea {
  display: block; width: 100%; margin-top: 4px;
  padding: 9px 11px; font: inherit;
  border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--ink);
}
input:focus, textarea:focus { outline: 2px solid rgba(11, 95, 255, 0.35); border-color: var(--accent); }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
button {
  font: inherit; font-weight: 600;
  padding: 10px 18px;
  border: none; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink);
  cursor: pointer; margin-top: 8px;
}
button:disabled { opacity: 0.55; cursor: default; }
.error { color: var(--danger); font-size: 14px; }
.ts { margin: 12px 0; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tab {
  background: transparent; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 16px; margin-top: 0;
}
.tab.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.assets { list-style: none; margin: 0; padding: 0; }
.assets li { padding: 12px 0; border-bottom: 1px solid var(--line); }
.assets li:last-child { border-bottom: none; }
.assets a { color: var(--accent); font-weight: 600; text-decoration: none; }
.assets a:hover { text-decoration: underline; }
.asset-meta { display: block; font-size: 13px; color: var(--muted); margin-top: 2px; }
.foot { margin-top: 28px; font-size: 13px; text-align: center; }
@media (max-width: 480px) { .row { grid-template-columns: 1fr; } }