:root {
  --bg: #0a0b0e;
  --bg-elevated: #131419;
  --bg-inset: #0e0f13;
  --border: #23252c;
  --border-strong: #33353e;
  --text: #edeef1;
  --text-dim: #9498a3;
  --text-faint: #5b5f6b;
  --accent: #c9a24a;
  --accent-strong: #e2bd6c;
  --accent-ink: #1a1408;
  --accent-soft: rgba(201, 162, 74, 0.1);
  --danger: #e2564f;
  --danger-soft: rgba(226, 86, 79, 0.12);
  --ok: #4caf82;

  --font-display: "Oswald", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius: 3px;
  --radius-lg: 5px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  background:
    radial-gradient(1200px 600px at 100% -10%, rgba(201, 162, 74, 0.06), transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ---------- shell / layout ---------- */

.shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 252px;
  flex-shrink: 0;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 26px 0 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 22px 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 18px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border: 1.5px solid var(--accent);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  font-family: var(--font-display);
  text-transform: uppercase;
}

.brand-text span {
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.14em;
}

.brand-text strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.03em;
}

nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 12px;
}

nav button {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  background: transparent;
  border: none;
  border-left: 2px solid transparent;
  color: var(--text-dim);
  text-align: left;
  cursor: pointer;
  padding: 11px 12px;
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: background 0.15s ease, color 0.15s ease;
}

nav button svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

nav button:hover {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

nav button.active {
  background: var(--accent-soft);
  border-left-color: var(--accent);
  color: var(--text);
}

.sidebar-footer {
  padding: 16px 12px 0;
  margin-top: 14px;
  border-top: 1px solid var(--border);
}

.sidebar-footer button {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-footer button svg {
  width: 16px;
  height: 16px;
}

.sidebar-footer button:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  padding: 24px 36px 20px;
  border-bottom: 1px solid var(--border);
}

.module-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 5px;
}

.topbar h2 {
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 600;
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.015em;
}

main {
  flex: 1;
  padding: 30px 36px 40px;
  max-width: 780px;
  width: 100%;
  overflow-y: auto;
}

.tab { display: none; }
.tab.active { display: block; }

/* ---------- cards / forms ---------- */

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  margin-bottom: 18px;
}

.card-accent {
  border-top: 2px solid var(--accent);
}

.card-title {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text);
  margin-bottom: 4px;
}

label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 6px;
  margin-top: 16px;
}

input[type="text"], input[type="password"], textarea, select {
  width: 100%;
  background: var(--bg-inset);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  font-family: var(--font-body);
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
}

textarea { resize: vertical; min-height: 68px; }

select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-dim) 50%), linear-gradient(135deg, var(--text-dim) 50%, transparent 50%);
  background-position: calc(100% - 18px) center, calc(100% - 13px) center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  padding: 11px 20px;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 16px;
}

button.primary:hover { background: var(--accent-strong); }
button.primary:disabled { opacity: 0.45; cursor: not-allowed; }

button.secondary {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  padding: 10px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 16px;
  margin-left: 8px;
}

button.secondary:hover { color: var(--text); border-color: var(--text-dim); }

/* ---------- chat / log de treino ---------- */

.chat {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: 52vh;
  overflow-y: auto;
  padding: 4px 2px;
  margin-bottom: 12px;
}

.msg {
  max-width: 82%;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.msg-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.msg-body {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.5;
  white-space: pre-wrap;
  background: var(--bg-inset);
  border: 1px solid var(--border);
}

.msg.user {
  align-self: flex-end;
  align-items: flex-end;
}

.msg.user .msg-body {
  border-right: 2px solid var(--accent);
}

.msg.assistant {
  align-self: flex-start;
}

.msg.assistant .msg-body {
  border-left: 2px solid var(--text-faint);
}

.msg.system-note {
  align-self: center;
  max-width: 100%;
}

.msg.system-note .msg-body,
.msg.system-note {
  color: var(--text-faint);
  font-size: 12.5px;
  font-style: italic;
  text-align: center;
  background: transparent;
  border: none;
  padding: 4px;
}

.row { display: flex; gap: 10px; align-items: flex-end; }
.row textarea { flex: 1; }

.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border-radius: 20px;
  background: transparent;
  color: var(--text-faint);
  border: 1px solid var(--border-strong);
  margin-left: 8px;
}

.error-box {
  background: var(--danger-soft);
  border: 1px solid var(--danger);
  color: #ff9c96;
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 13px;
  margin-top: 10px;
}

.hint {
  color: var(--text-faint);
  font-size: 12px;
  margin-top: 10px;
  line-height: 1.5;
}

/* ---------- coach no meet (extensão) ---------- */

.download-link {
  display: inline-block;
  text-decoration: none;
}

.steps {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.9;
}

.steps code {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
}

#ext-status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0 4px;
}

#ext-status-row .dot { flex-shrink: 0; }
#ext-status-row #ext-status-text { flex: 1; color: var(--text-dim); font-size: 13px; }
#ext-status-row button.secondary { margin: 0; padding: 7px 12px; font-size: 11px; }

#voice-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 6px 0 16px;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text-faint);
}

.dot.listening { background: var(--danger); animation: pulse 1s infinite; }
.dot.speaking { background: var(--accent); animation: pulse 1s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

/* ---------- modal ---------- */

#settings-modal {
  position: fixed;
  inset: 0;
  background: rgba(4, 4, 6, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
}

#settings-modal.open { display: flex; }

#settings-modal .card {
  width: 440px;
  max-width: 90vw;
  border-top: 2px solid var(--accent);
}

.modal-actions { margin-top: 4px; }

/* ---------- responsive ---------- */

@media (max-width: 780px) {
  .shell { flex-direction: column; }

  .sidebar {
    width: 100%;
    flex-direction: row;
    align-items: center;
    padding: 12px 14px;
    overflow-x: auto;
  }

  .brand { border-bottom: none; margin-bottom: 0; padding: 0 14px 0 0; }
  .brand-text { display: none; }

  nav { flex-direction: row; padding: 0; }
  nav button { flex-direction: column; gap: 4px; padding: 8px 12px; border-left: none; border-bottom: 2px solid transparent; border-radius: 0; white-space: nowrap; }
  nav button span { font-size: 10px; }
  nav button.active { border-left-color: transparent; border-bottom-color: var(--accent); }

  .sidebar-footer { border-top: none; margin-top: 0; padding: 0 0 0 8px; width: auto; }
  .sidebar-footer button span { display: none; }
  .sidebar-footer button { padding: 10px; }

  .topbar { padding: 20px; }
  main { padding: 20px; }
}