:root {
  --bg: #f7f7f5;
  --surface: #ffffff;
  --text: #1c1c1a;
  --muted: #6f6f6a;
  --accent: #0f766e;
  --accent-text: #ffffff;
  --you: #d8eeec;
  --stranger: #ececea;
  --danger: #b4232a;
  --mask-bg: #1c1c1a;
  --mask-text: #f7f7f5;
  --border: #e2e2de;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131312;
    --surface: #1c1c1a;
    --text: #ececea;
    --muted: #8f8f88;
    --accent: #14b8a6;
    --accent-text: #06211e;
    --you: #123f3b;
    --stranger: #262624;
    --danger: #f87171;
    --mask-bg: #ececea;
    --mask-text: #131312;
    --border: #2c2c29;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; } /* our flex displays must not defeat `hidden` */
html, body { height: 100%; }
body {
  margin: 0;
  font: 16px/1.45 system-ui, -apple-system, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  padding-top: max(0.6rem, env(safe-area-inset-top));
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.brand { font-weight: 700; letter-spacing: -0.02em; }
.status { color: var(--muted); font-size: 0.85rem; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* connection-state dot — the at-a-glance truth about the link */
.dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot.off { background: var(--border); }
.dot.ok { background: #16a34a; }
.dot.busy { background: #d97706; }
.dot.bad { background: var(--danger); }
.dot.pulse { animation: pulse 1.2s ease-in-out infinite; }
@keyframes pulse {
  50% { opacity: 0.3; }
}
.actions { display: flex; gap: 0.5rem; }

button {
  font: inherit;
  font-size: 0.9rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
}
button:hover { border-color: var(--muted); }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}
button.primary:hover { filter: brightness(1.08); }
button:disabled { opacity: 0.45; cursor: default; }

main { flex: 1; display: flex; flex-direction: column; min-height: 0; }

/* intro */
#intro {
  justify-content: center;
  max-width: 34rem;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
  gap: 1rem;
}
#intro h1 { font-size: 1.9rem; line-height: 1.2; letter-spacing: -0.02em; margin: 0; }
#intro p { margin: 0; color: var(--muted); }
#intro ul { margin: 0; padding-left: 1.2rem; color: var(--muted); }
#intro li { margin: 0.3rem 0; }
#intro .primary { padding: 0.7rem 1.4rem; font-size: 1rem; align-self: flex-start; }
.fineprint { font-size: 0.8rem; }

/* chat */
#log {
  flex: 1;
  overflow-y: auto;
  margin: 0;
  padding: 1rem;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
#log li {
  max-width: 78%;
  padding: 0.45rem 0.75rem;
  border-radius: 1rem;
  overflow-wrap: anywhere;
}
li.you { align-self: flex-end; background: var(--you); border-bottom-right-radius: 0.3rem; }
li.stranger { align-self: flex-start; background: var(--stranger); border-bottom-left-radius: 0.3rem; }
li.sys {
  align-self: center;
  background: none;
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
  max-width: 90%;
}
li.pending { opacity: 0.55; }
li .note { display: block; font-size: 0.75rem; color: var(--danger); margin-top: 0.15rem; }
li.rejected { opacity: 0.7; }

.mask {
  background: var(--mask-bg);
  color: var(--mask-text);
  border-radius: 0.25rem;
  padding: 0 0.3rem;
  font-size: 0.85em;
  letter-spacing: 0.05em;
}

#composer {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--surface);
}
#input {
  flex: 1;
  font: inherit;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  min-width: 0;
}
#input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }