/* walkthrough.css - styling for the generic step viewer (walkthrough.js). */

.step-walk {
  --sw-radius: 0.5rem;
  margin: 1.5rem 0;
  padding: 1rem;
  border: 1px solid var(--md-default-fg-color--lightest);
  border-radius: var(--sw-radius);
  background: var(--md-default-bg-color);
  outline: none;
}

.step-walk:focus-visible {
  border-color: var(--md-accent-fg-color);
  box-shadow: 0 0 0 2px var(--md-accent-fg-color--transparent);
}

.sw__title {
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--md-default-fg-color--light);
  margin-bottom: 0.75rem;
}

/* Board -------------------------------------------------------------- */

.sw__board {
  position: relative;
  padding: 3.5rem 0.5rem 1rem;
  overflow-x: auto;
  overflow-y: hidden;
}

.sw__cells {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.4rem;
  justify-content: center;
  min-height: 3.2rem;
}

.sw__overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
}

.sw__arrow {
  fill: none;
  stroke: var(--md-accent-fg-color);
  stroke-width: 2;
  stroke-linecap: round;
}

.sw__arrow--muted {
  stroke: var(--md-default-fg-color--light);
  stroke-dasharray: 4 3;
}

.sw__arrowhead {
  fill: var(--md-accent-fg-color);
}

.sw__arrow-label {
  fill: var(--md-default-fg-color--light);
  font-size: 0.7rem;
  font-family: var(--md-text-font-family);
}

/* Cells -------------------------------------------------------------- */

.sw-cell {
  flex: 0 0 auto;
  min-width: 2.75rem;
  padding: 0.5rem 0.35rem;
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 0.35rem;
  background: var(--md-code-bg-color);
  text-align: center;
  transition: background 120ms ease, border-color 120ms ease, transform 120ms ease;
}

.sw-cell__value {
  font-family: var(--md-code-font-family);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.2;
}

.sw-cell__sub {
  margin-top: 0.15rem;
  font-size: 0.65rem;
  color: var(--md-default-fg-color--light);
}

.sw-cell--pivot {
  border-color: var(--md-accent-fg-color);
  background: var(--md-accent-fg-color--transparent);
}

.sw-cell--active {
  border-color: var(--md-primary-fg-color);
  transform: translateY(-3px);
}

.sw-cell--compare {
  border-style: dashed;
  border-color: var(--md-primary-fg-color);
}

.sw-cell--done {
  border-color: color-mix(in srgb, var(--md-primary-fg-color) 45%, transparent);
  background: color-mix(in srgb, var(--md-primary-fg-color) 10%, var(--md-code-bg-color));
}

.sw-cell--muted {
  opacity: 0.4;
}

/* Caption, code, controls -------------------------------------------- */

.sw__caption {
  min-height: 3rem;
  margin: 0.75rem 0 0;
  padding: 0.6rem 0.75rem;
  border-left: 3px solid var(--md-primary-fg-color);
  background: var(--md-default-fg-color--lightest);
  border-radius: 0 0.3rem 0.3rem 0;
  font-size: 0.8rem;
  line-height: 1.6;
}

.sw__code {
  margin: 0.75rem 0 0;
  padding: 0.6rem 0;
  border-radius: 0.3rem;
  background: var(--md-code-bg-color);
  overflow-x: auto;
  font-size: 0.72rem;
  line-height: 1.5;
}

.sw-line {
  display: block;
  padding: 0 0.75rem;
  white-space: pre;
  border-left: 3px solid transparent;
}

/* Primary rather than accent: an accent-tinted row reads like a diff deletion. */
.sw-line--hot {
  border-left-color: var(--md-primary-fg-color);
  background: color-mix(in srgb, var(--md-primary-fg-color) 12%, transparent);
}

.sw-line__no {
  display: inline-block;
  width: 2ch;
  margin-right: 1ch;
  text-align: right;
  color: var(--md-default-fg-color--lighter);
  user-select: none;
}

.sw__controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.9rem;
}

.sw__btn {
  flex: 0 0 auto;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--md-default-fg-color--lighter);
  border-radius: 0.3rem;
  background: transparent;
  color: var(--md-default-fg-color);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
}

.sw__btn:hover:not(:disabled) {
  border-color: var(--md-accent-fg-color);
  color: var(--md-accent-fg-color);
}

.sw__btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.sw__progress {
  flex: 1 1 auto;
  height: 3px;
  border-radius: 2px;
  background: var(--md-default-fg-color--lightest);
  overflow: hidden;
}

.sw__bar {
  height: 100%;
  background: var(--md-primary-fg-color);
  transition: width 150ms ease;
}

.sw__counter {
  flex: 0 0 auto;
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  color: var(--md-default-fg-color--light);
}

.sw__error {
  padding: 0.6rem 0.75rem;
  border-radius: 0.3rem;
  background: var(--md-code-bg-color);
  color: var(--md-default-fg-color--light);
  font-size: 0.75rem;
}