:root {
  --bg: #12100f;
  --panel: #1d1a18;
  --panel-2: #262220;
  --ink: #f5efe8;
  --ink-dim: #a89e95;
  --accent: #6ee7b7;
  --accent-warm: #f0a877;
  --learner: #2d3b4a;
  --radius: 16px;
}

* { box-sizing: border-box; }

/* `display: grid` on .gate/.stage would otherwise beat the hidden attribute. */
[hidden] { display: none !important; }

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 700px at 20% -10%, #2a2320, var(--bg));
  color: var(--ink);
  font: 16px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

main { min-height: 100vh; display: grid; }

/* ------------------------------------------------------------------ gate */

.gate { display: grid; place-items: center; padding: 24px; }

.gate-card {
  background: var(--panel);
  border: 1px solid #332d29;
  border-radius: 22px;
  padding: 40px;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.gate-card h1 {
  margin: 0;
  font-size: 34px;
  letter-spacing: -0.02em;
  background: linear-gradient(100deg, var(--accent-warm), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline { color: var(--ink-dim); margin: 8px 0 28px; }

.gate-settings {
  display: grid;
  gap: 14px;
  text-align: left;
  margin-bottom: 26px;
}

label { display: grid; gap: 6px; font-size: 13px; color: var(--ink-dim); }

select, input[type="text"] {
  background: var(--panel-2);
  color: var(--ink);
  border: 1px solid #3a332e;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}

button { font: inherit; cursor: pointer; }

.primary {
  width: 100%;
  padding: 14px;
  border: 0;
  border-radius: 12px;
  font-weight: 650;
  color: #10201a;
  background: linear-gradient(100deg, var(--accent), #a7f3d0);
}
.primary:hover { filter: brightness(1.06); }

.fineprint { color: #756c64; font-size: 12px; margin: 16px 0 0; }

/* ------------------------------------------------------------- sign-in */

.provider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  margin-bottom: 10px;
  border-radius: 12px;
  border: 1px solid #3a332e;
  background: var(--panel-2);
  color: var(--ink);
  font-weight: 550;
}
.provider:hover:not(:disabled) { border-color: #6b625b; background: #2e2926; }
.provider:disabled { opacity: 0.5; cursor: progress; }

.provider-mark {
  display: inline-grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  color: #1a1a1a;
  font-weight: 700;
  font-size: 13px;
  line-height: 1;
}

.signin-error {
  margin: 10px 0 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: #3a2220;
  border-left: 3px solid #f87171;
  color: #fca5a5;
  font-size: 13px;
  text-align: left;
}

.who {
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
  padding: 12px;
  margin-bottom: 8px;
  border-radius: 12px;
  background: var(--panel-2);
  border: 1px solid #3a332e;
}
.who img { width: 40px; height: 40px; border-radius: 50%; }
.who strong { display: block; font-size: 15px; }
.who .fineprint { margin: 2px 0 0; }

.signout { width: 100%; margin-top: 10px; }

.primary:disabled { opacity: 0.45; cursor: not-allowed; filter: none; }

/* ----------------------------------------------------------------- stage */

.stage {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(360px, 1fr);
  gap: 28px;
  padding: 28px;
  max-width: 1180px;
  width: 100%;
  margin: 0 auto;
  align-content: start;
}

@media (max-width: 860px) {
  .stage { grid-template-columns: 1fr; gap: 16px; }
  /* Keep the face in view instead of letting the transcript push it off-screen. */
  .avatar-panel {
    position: sticky;
    top: 0;
    z-index: 2;
    padding-bottom: 10px;
    background: linear-gradient(var(--bg) 70%, transparent);
  }
  #face { max-width: 160px; }
  .transcript { max-height: none; min-height: 240px; }
}

.avatar-panel { display: grid; justify-items: center; align-content: start; gap: 14px; }

#face { width: 100%; max-width: 320px; height: auto; }

#face #ring { transition: opacity 0.25s; }
#face[data-state="listening"] #ring { opacity: 0.6; }
#face[data-state="thinking"] #ring { opacity: 0.25; stroke: var(--accent-warm); }
#face[data-state="speaking"] #ring { opacity: 0.3; stroke: #93c5fd; }

.status { min-height: 24px; color: var(--ink-dim); font-size: 14px; margin: 0; text-align: center; }

.controls { display: flex; gap: 10px; align-items: center; }

.mic {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid #3a332e;
  background: var(--panel-2);
  color: var(--ink);
  font-weight: 600;
}
.mic:hover:not(:disabled) { border-color: #554c45; }
.mic:disabled { opacity: 0.45; cursor: not-allowed; }

.mic-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #6b625b;
}
.mic.active { border-color: var(--accent); background: #14322a; }
.mic.active .mic-dot { background: #f87171; animation: pulse 1s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.5); opacity: 0.55; }
}

.ghost {
  padding: 11px 16px;
  border-radius: 10px;
  border: 1px solid #3a332e;
  background: transparent;
  color: var(--ink-dim);
}
.ghost:hover:not(:disabled) { color: var(--ink); border-color: #554c45; }
.ghost:disabled { opacity: 0.4; cursor: not-allowed; }

.hint { color: #6b625b; font-size: 12px; margin: 0; }
kbd {
  background: var(--panel-2);
  border: 1px solid #3a332e;
  border-radius: 5px;
  padding: 1px 6px;
  font-size: 11px;
}

/* ------------------------------------------------------------------ chat */

.chat-panel { display: grid; gap: 14px; align-content: start; }

.transcript {
  background: var(--panel);
  border: 1px solid #332d29;
  border-radius: var(--radius);
  padding: 18px;
  min-height: 320px;
  max-height: 56vh;
  overflow-y: auto;
  display: grid;
  gap: 14px;
  align-content: start;
}

.turn { max-width: 92%; }

.turn.learner {
  justify-self: end;
  background: var(--learner);
  border-radius: 14px 14px 4px 14px;
  padding: 10px 14px;
}
.turn.learner.pending { opacity: 0.5; font-style: italic; }

.turn.tutor {
  justify-self: start;
  background: var(--panel-2);
  border-radius: 14px 14px 14px 4px;
  padding: 12px 15px;
}

.turn.tutor .es { margin: 0; font-size: 17px; }
.turn.tutor .en { margin: 6px 0 0; color: var(--ink-dim); font-size: 14px; }
body.hide-english .turn.tutor .en { display: none; }

.correction {
  margin-top: 12px;
  padding: 10px 12px;
  background: #2f2a1c;
  border-left: 3px solid #eab308;
  border-radius: 0 8px 8px 0;
  font-size: 13px;
}
.fix-label {
  display: block;
  color: #eab308;
  font-weight: 650;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}
.correction s { color: #8c8378; }
.correction strong { color: #fde68a; }
.correction em { display: block; margin-top: 4px; color: var(--ink-dim); font-style: normal; }

.suggestions { display: flex; flex-wrap: wrap; gap: 8px; min-height: 0; }

.chip {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px dashed #4a423b;
  background: transparent;
  color: var(--accent);
  font-size: 14px;
}
.chip:hover { background: #14322a; border-style: solid; }

.text-form { display: flex; gap: 8px; }
.text-form input { flex: 1; }

.settings {
  background: var(--panel);
  border: 1px solid #332d29;
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 14px;
}
.settings summary { cursor: pointer; color: var(--ink-dim); }
.settings .row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  color: var(--ink);
  font-size: 14px;
}
.meter-row { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.meter {
  flex: 1;
  height: 10px;
  background: #14120f;
  border: 1px solid #332d29;
  border-radius: 999px;
  overflow: hidden;
}
.meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #fbbf24 70%, #f87171);
  transition: width 0.06s linear;
}
#meter-value { min-width: 88px; }

.diag-log {
  margin: 10px 0;
  padding: 10px;
  max-height: 200px;
  overflow: auto;
  background: #14120f;
  border: 1px solid #332d29;
  border-radius: 8px;
  font: 11px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
  color: #b9d9c6;
  white-space: pre-wrap;
  word-break: break-word;
}

.settings input[type="range"] { flex: 1; accent-color: var(--accent); }
.settings input[type="checkbox"] { accent-color: var(--accent); width: 16px; height: 16px; }

.continuity {
  margin: 8px 0 0;
  padding: 10px 12px;
  border-radius: 8px;
  background: #1b2a24;
  border-left: 3px solid var(--accent);
  color: #a7d8bf;
  font-size: 12.5px;
  text-align: left;
}