:root {
  --bg: #f7f7f5; --panel: #ffffff; --text: #1c1c1e; --muted: #5f6368; --line: #d9d9d6;
  --accent: #1f6f5c; --accent-text: #ffffff; --warn: #a33a1f;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #151617; --panel: #1f2123; --text: #ececec; --muted: #a3a7ab; --line: #34373a;
          --accent: #5cc3a6; --accent-text: #0d1f1a; --warn: #ff8a6b; }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text);
       font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; }
.bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between;
       padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--panel); }
h1 { font-size: 18px; margin: 0; }
h2 { font-size: 20px; margin: 8px 0; }
main { max-width: 640px; margin: 0 auto; padding: 16px; }
.who { color: var(--muted); font-size: 14px; }
.status { min-height: 1.5em; color: var(--muted); margin: 0 0 8px; }
.status.error { color: var(--warn); }
button, .button { font: inherit; border: 1px solid var(--line); background: var(--panel); color: var(--text);
                  border-radius: 10px; padding: 10px 16px; min-height: 44px; cursor: pointer;
                  text-decoration: none; display: inline-flex; align-items: center; justify-content: center; }
.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.link { border: 0; background: none; color: var(--accent); padding: 0 4px; min-height: 0; }
button:disabled { opacity: .55; cursor: default; }
.row { display: flex; flex-wrap: wrap; gap: 8px; }
.message { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px;
           overflow-wrap: anywhere; }
.message code { font-size: 17px; }
.hint { color: var(--muted); font-size: 14px; }
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab[aria-pressed="true"] { border-color: var(--accent); color: var(--accent); }
.cards { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px; }
.card .meta { display: flex; flex-wrap: wrap; gap: 4px 12px; color: var(--muted); font-size: 14px; }
.card .kind { font-weight: 600; color: var(--text); }
.card img { display: block; max-width: 100%; height: auto; margin-top: 8px; border-radius: 8px; }
.card audio { width: 100%; margin-top: 8px; }
.card button { margin-top: 8px; }
form { display: grid; gap: 8px; }
label { font-weight: 600; }
textarea, input[type=file] { font: inherit; width: 100%; color: var(--text); background: var(--panel);
                             border: 1px solid var(--line); border-radius: 10px; padding: 10px; }