/* ==========================================================================
   QT Trading Lab — shared components on the Nocturne glass tokens.
   Requires qt-tokens.css. Classes are prefixed `qt-` so they can sit next to
   legacy class names still emitted by course-app.js (.btn-primary) while pages migrate.
   ========================================================================== */

/* ---- Labels ---- */
.qt-eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-300);
}

.qt-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

/* ---- Buttons: the primary action is an accent outline, never a fill ---- */
.qt-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 38px;
  padding: 8px 16px;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text);
  font: 500 14px/1.2 var(--font-body);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.qt-btn svg {
  flex: none;
  width: 15px;
  height: 15px;
}

.qt-btn--primary {
  border-color: var(--color-accent);
  color: var(--color-accent-300);
}

.qt-btn--primary:hover {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
}

.qt-btn--primary:active {
  background: color-mix(in srgb, var(--color-accent) 22%, transparent);
}

.qt-btn--secondary {
  border-color: var(--color-divider);
}

.qt-btn--secondary:hover {
  background: color-mix(in srgb, var(--color-text) 7%, transparent);
}

.qt-btn--secondary:active {
  background: color-mix(in srgb, var(--color-text) 14%, transparent);
}

.qt-btn--ghost {
  padding-inline: 8px;
  color: var(--color-accent-300);
}

.qt-btn--ghost:hover {
  background: color-mix(in srgb, var(--color-accent) 10%, transparent);
}

.qt-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ---- Tags ---- */
.qt-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.qt-tag--accent {
  background: var(--color-accent-800);
  color: var(--color-accent-100);
}

.qt-tag--neutral {
  background: var(--color-neutral-800);
  color: var(--color-neutral-100);
}

.qt-tag--outline {
  border-color: var(--color-accent);
  color: var(--color-accent-300);
}

.qt-tag--pos {
  background: color-mix(in srgb, var(--pl-pos) 14%, transparent);
  color: var(--pl-pos);
}

.qt-tag--warn {
  background: color-mix(in srgb, var(--pl-warn) 14%, transparent);
  color: var(--pl-warn);
}

/* ---- Glass card ---- */
.qt-card {
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  background: var(--glass-fill);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.28);
}

a.qt-card {
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

a.qt-card:hover {
  border-color: var(--color-divider-strong);
  background: color-mix(in srgb, var(--color-raised) 92%, transparent);
}

/* ---- Progress bar ---- */
.qt-progress {
  height: 3px;
  overflow: hidden;
  border-radius: 2px;
  background: color-mix(in srgb, var(--color-text) 10%, transparent);
}

.qt-progress > span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--color-accent);
  transition: width 0.4s ease;
}

/* ---- Rules fade to transparent at both ends (Nocturne signature) ---- */
.qt-rule {
  height: 1px;
  margin: 0;
  border: 0;
  background: linear-gradient(to right, transparent, var(--color-divider) 48px, var(--color-divider) calc(100% - 48px), transparent);
}

/* ---- Table ---- */
.qt-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.qt-table th {
  padding: 6px 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-align: left;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.qt-table td {
  padding: 8px;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.qt-table thead tr {
  background: linear-gradient(to right, transparent, var(--color-divider) 48px, var(--color-divider) calc(100% - 48px), transparent) no-repeat bottom / 100% 1px;
}

.qt-table tbody tr {
  background: linear-gradient(to right, transparent, color-mix(in srgb, var(--color-text) 8%, transparent) 48px, color-mix(in srgb, var(--color-text) 8%, transparent) calc(100% - 48px), transparent) no-repeat bottom / 100% 1px;
}

/* ---- Screen-reader-only text ---- */
.qt-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---- Progress ring (markup from progressRing() in course-app.js) ---- */
.qt-ring {
  display: block;
  width: 84px;
  height: 84px;
}

.qt-ring-track {
  fill: none;
  stroke: var(--color-neutral-800);
  stroke-width: 5;
}

.qt-ring-value {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 5;
  stroke-linecap: round;
}

.qt-ring text {
  fill: var(--color-text);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 500;
}

@media (prefers-reduced-motion: reduce) {
  .qt-btn,
  a.qt-card,
  .qt-progress > span {
    transition: none;
  }
}