:root {
  color-scheme: dark;
  --bg: var(--tg-theme-bg-color, #10141a);
  --text: var(--tg-theme-text-color, #eef1f4);
  --hint: var(--tg-theme-hint-color, #9aa3ad);
  --card: var(--tg-theme-secondary-bg-color, #1b222c);
  --btn: var(--tg-theme-button-color, #3c7dff);
  --btn-text: var(--tg-theme-button-text-color, #fff);
  --line: color-mix(in srgb, var(--text) 12%, transparent);
  font: 16px/1.4 system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
main { max-width: 720px; margin: 0 auto; padding: 20px 16px 32px; }
h1 { font-size: 22px; margin: 0 0 4px; }
.hint { color: var(--hint); margin: 0 0 16px; }
.grid { display: grid; gap: 10px; }
button, .tile {
  font: inherit; color: inherit; text-align: left;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px; padding: 14px 16px; width: 100%;
}
button.primary { background: var(--btn); color: var(--btn-text); border: 0; }
.tile b, button b { display: block; font-size: 17px; }
.tile span, button span { color: var(--hint); }
.row { display: flex; gap: 8px; }
input, textarea {
  width: 100%; font: inherit; color: inherit;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; padding: 10px 12px;
}
.list { display: grid; gap: 8px; margin-top: 12px; }
.file { display: flex; justify-content: space-between; gap: 12px; }
.chat { display: grid; gap: 8px; margin: 12px 0; }
.bubble { padding: 10px 12px; border-radius: 12px; background: var(--card); white-space: pre-wrap; }
.bubble.me { background: color-mix(in srgb, var(--btn) 35%, var(--card)); }
.error { color: #ffb4b4; }
.top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }