:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --call: #16a34a;
  --hangup: #dc2626;
  --accent: #2563eb;
  --error: #f87171;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: max(24px, env(safe-area-inset-top)) 16px max(24px, env(safe-area-inset-bottom));
}

[hidden] { display: none !important; }

h1 { font-size: 28px; margin: 48px 0 24px; text-align: center; }

#login-form { display: flex; flex-direction: column; gap: 12px; max-width: 360px; width: 100%; margin: 0 auto; }
#login-form label { color: var(--muted); }
#login-form input {
  font-size: 18px;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--surface);
  background: var(--surface);
  color: var(--text);
}
#login-form button {
  font-size: 18px;
  padding: 14px;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: white;
}
.error { color: var(--error); min-height: 1.4em; margin: 0; }

#call-view { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 32px; }

#status { margin: 24px 0 0; color: var(--muted); font-size: 17px; text-align: center; min-height: 1.4em; }

.call-button {
  width: 168px;
  height: 168px;
  border-radius: 50%;
  border: 0;
  background: var(--call);
  color: white;
  font-size: 24px;
  font-weight: 600;
  touch-action: manipulation;
}
.call-button.hangup { background: var(--hangup); }
.call-button:disabled { opacity: 0.6; }

.captions { width: 100%; max-width: 560px; display: flex; flex-direction: column; gap: 12px; }
.caption {
  margin: 0;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--surface);
  min-height: 3em;
  overflow-wrap: anywhere;
}
.caption .who { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.caption .text { font-size: 17px; line-height: 1.5; }