:root {
  --bg: var(--tg-theme-bg-color, #17212b);
  --secondary-bg: var(--tg-theme-secondary-bg-color, #232e3c);
  --text: var(--tg-theme-text-color, #f5f5f5);
  --hint: var(--tg-theme-hint-color, #7d8b99);
  --link: var(--tg-theme-link-color, #6ab3f3);
  --button: var(--tg-theme-button-color, #5288c1);
  --button-text: var(--tg-theme-button-text-color, #fff);
  --sep: color-mix(in srgb, var(--hint) 25%, transparent);
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, sans-serif;
  overscroll-behavior: none;
}
#app { display: flex; flex-direction: column; height: 100vh; height: 100dvh; }

#topbar { padding: 12px 16px 8px; flex: 0 0 auto; }
#title { font-size: 18px; font-weight: 600; }
#subtitle { color: var(--hint); font-size: 13px; min-height: 16px; }

#view { flex: 1 1 auto; overflow-y: auto; padding: 4px 12px 16px; -webkit-overflow-scrolling: touch; }

#tabbar {
  flex: 0 0 auto; display: flex; border-top: 1px solid var(--sep);
  background: var(--secondary-bg);
  padding-bottom: env(safe-area-inset-bottom, 0);
}
#tabbar button {
  flex: 1; background: none; border: none; color: var(--hint);
  font-size: 20px; padding: 8px 0 6px; cursor: pointer; display: flex;
  flex-direction: column; align-items: center; gap: 2px;
}
#tabbar button span { font-size: 11px; }
#tabbar button.active { color: var(--link); }

.card {
  background: var(--secondary-bg); border-radius: 12px; padding: 12px 14px;
  margin: 8px 0; cursor: pointer; border: 1px solid transparent;
}
.card:active { border-color: var(--link); }
.card .t { font-weight: 600; margin-bottom: 4px; }
.card .m { color: var(--hint); font-size: 12px; display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  display: inline-block; padding: 1px 7px; border-radius: 20px; font-size: 11px;
  background: color-mix(in srgb, var(--link) 20%, transparent); color: var(--link);
}
.badge.err { background: color-mix(in srgb, #e05a5a 22%, transparent); color: #ff8a8a; }
.badge.ok { background: color-mix(in srgb, #4caf7d 22%, transparent); color: #6fd39c; }

.chip {
  display: inline-block; padding: 2px 9px; margin: 2px 4px 2px 0; border-radius: 20px;
  background: var(--secondary-bg); color: var(--hint); font-size: 12px; cursor: pointer;
}
.chip.active { background: var(--button); color: var(--button-text); }

.row-link { color: var(--link); text-decoration: none; word-break: break-all; }
.hint { color: var(--hint); font-size: 13px; }
.center { text-align: center; padding: 40px 12px; color: var(--hint); }

/* markdown */
.md { padding: 4px 2px 20px; }
.md h1 { font-size: 20px; } .md h2 { font-size: 17px; margin-top: 20px; }
.md h3 { font-size: 15px; }
.md a { color: var(--link); word-break: break-all; }
.md code { background: var(--secondary-bg); padding: 1px 5px; border-radius: 5px; font-size: 13px; }
.md pre { background: var(--secondary-bg); padding: 12px; border-radius: 10px; overflow-x: auto; }
.md pre code { background: none; padding: 0; }
.md blockquote { border-left: 3px solid var(--sep); margin: 8px 0; padding: 2px 12px; color: var(--hint); }
.md img { max-width: 100%; border-radius: 8px; }
.md table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--sep); padding: 5px 8px; text-align: left; }
.md ul, .md ol { padding-left: 22px; }

.src-btn {
  display: inline-block; margin: 4px 6px 4px 0; padding: 7px 14px; border-radius: 10px;
  background: var(--button); color: var(--button-text); text-decoration: none; font-size: 13px;
}

/* chat */
#chat-wrap { display: flex; flex-direction: column; height: 100%; }
#chat-log { flex: 1 1 auto; overflow-y: auto; padding-bottom: 8px; }
.msg { max-width: 88%; padding: 9px 13px; border-radius: 14px; margin: 6px 0; white-space: pre-wrap; word-wrap: break-word; }
.msg.me { background: var(--button); color: var(--button-text); margin-left: auto; border-bottom-right-radius: 4px; }
.msg.ai { background: var(--secondary-bg); border-bottom-left-radius: 4px; }
.msg.ai .md { padding: 0; }
#chat-input { display: flex; gap: 8px; padding: 8px 0 4px; flex: 0 0 auto; }
#chat-input textarea {
  flex: 1; resize: none; border-radius: 18px; border: 1px solid var(--sep);
  background: var(--secondary-bg); color: var(--text); padding: 9px 14px; font: inherit; max-height: 100px;
}
#chat-input button { border: none; background: var(--button); color: var(--button-text); border-radius: 50%; width: 40px; height: 40px; font-size: 18px; cursor: pointer; flex: 0 0 auto; }
.typing { color: var(--hint); font-style: italic; }

.search-box { display: flex; gap: 8px; margin: 6px 0 10px; }
.search-box input {
  flex: 1; border-radius: 18px; border: 1px solid var(--sep);
  background: var(--secondary-bg); color: var(--text); padding: 9px 14px; font: inherit;
}
.spin { text-align: center; padding: 30px; color: var(--hint); }