:root {
  --bg: #0f1115;
  --surface: #181b22;
  --surface-2: #20242d;
  --border: #2c313c;
  --text: #e8eaf0;
  --muted: #9aa1b1;
  --accent: #4f8cff;
  --accent-strong: #2f6fe8;
  --live: #e5484d;
  --ok: #30a46c;
  --warn: #f5a524;
  --radius: 14px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme: dark;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f5f6f8;
    --surface: #ffffff;
    --surface-2: #eef0f4;
    --border: #d9dde5;
    --text: #15181e;
    --muted: #5b6272;
    color-scheme: light;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; background: var(--bg); color: var(--text); }

body { min-height: 100dvh; -webkit-tap-highlight-color: transparent; }

h1, h2 { margin: 0 0 8px; }
h2 { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }

.muted { color: var(--muted); }
.error { color: var(--live); margin: 8px 0 0; }

.btn {
  font: inherit;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 10px;
  padding: 12px 16px;
  min-height: 44px;
  cursor: pointer;
}
.btn:disabled { opacity: 0.5; cursor: default; }
.btn-primary { background: var(--accent); border-color: var(--accent-strong); color: #fff; font-weight: 600; }
.btn-danger { background: transparent; border-color: var(--live); color: var(--live); }
.btn-ghost { background: transparent; }
.btn-small { padding: 6px 12px; min-height: 36px; font-size: 0.9rem; }

.row { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; }

/* Login */
body.login { display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 380px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
}
.login-card form { display: grid; gap: 10px; margin-top: 16px; }
.login-card input {
  font: inherit; padding: 12px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); min-height: 44px;
}

/* App */
.topbar {
  position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; padding-top: max(10px, env(safe-area-inset-top));
  background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; }
.status {
  margin-left: auto; font-size: 0.85rem; padding: 4px 10px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border); white-space: nowrap;
}
.status-live { background: var(--live); color: #fff; border-color: var(--live); }
.status-busy { background: var(--warn); color: #111; border-color: var(--warn); }
.status-ok { background: var(--ok); color: #fff; border-color: var(--ok); }
.status-error { background: transparent; color: var(--live); border-color: var(--live); }

.layout {
  max-width: 720px; margin: 0 auto; padding: 16px; display: grid; gap: 20px;
  padding-bottom: max(16px, env(safe-area-inset-bottom));
}

.ptt-area { display: grid; justify-items: center; gap: 12px; text-align: center; }
.ptt {
  width: min(56vw, 220px); aspect-ratio: 1; border-radius: 50%;
  border: 4px solid var(--accent-strong); background: var(--accent); color: #fff;
  display: grid; place-content: center; justify-items: center; gap: 8px;
  font: inherit; font-weight: 600; cursor: pointer; touch-action: none; user-select: none;
  -webkit-user-select: none; -webkit-touch-callout: none;
  box-shadow: 0 8px 30px rgb(79 140 255 / 0.35);
  transition: transform 0.08s ease, background 0.15s ease;
}
.ptt.is-down { background: var(--live); border-color: #b4282d; transform: scale(0.96); box-shadow: 0 0 0 12px rgb(229 72 77 / 0.25); }
.ptt.is-connecting { background: var(--warn); border-color: #c98112; color: #111; }
.ptt:disabled { opacity: 0.6; }
.ptt-label { font-size: 1rem; }
.hint { max-width: 420px; margin: 0; font-size: 0.9rem; }
.meta { margin: 0; font-size: 0.8rem; }

.drafts { display: grid; gap: 12px; }
.drafts:empty { display: none; }
.draft {
  background: var(--surface); border: 2px solid var(--warn); border-radius: var(--radius); padding: 16px;
}
.draft[data-status="sent"] { border-color: var(--ok); }
.draft[data-status="failed"], .draft[data-status="cancelled"], .draft[data-status="expired"] { border-color: var(--border); opacity: 0.75; }
.draft-label { color: var(--muted); }
.draft-text { white-space: pre-wrap; font-size: 1.05rem; line-height: 1.45; margin: 10px 0; }
.draft-status { margin: 0 0 10px; font-size: 0.85rem; }
.draft .row { justify-content: flex-start; }

.transcript-area { display: grid; gap: 10px; }
.transcript { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; max-height: 45dvh; overflow-y: auto; }
.transcript li { padding: 10px 12px; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); line-height: 1.4; }
.transcript li.user { background: var(--surface-2); margin-left: 15%; }
.transcript li.assistant { margin-right: 15%; }
.transcript li.system { font-size: 0.85rem; color: var(--muted); background: transparent; border-style: dashed; }
.transcript li .who { display: block; font-size: 0.75rem; color: var(--muted); margin-bottom: 2px; }

.text-form { display: flex; gap: 8px; }
.text-form input {
  flex: 1; min-width: 0; font: inherit; padding: 12px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); min-height: 44px;
}