/* ===== OPENINGS ===== */

.openings__intro {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 32px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-text-dim);
}

.openings__section {
  max-width: 900px;
  margin: 0 auto 36px;
  padding: 0 16px;
}

.openings__section-title {
  font-family: var(--f-display);
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--c-gold-deep);
  text-align: center;
  margin: 0 0 14px;
  font-weight: 500;
}

.openings__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.opening-card {
  position: relative;
  background: linear-gradient(160deg, rgba(31, 58, 59, 0.7), rgba(13, 31, 32, 0.7));
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 20px 22px;
  text-align: left;
  cursor: pointer;
  color: var(--c-text);
  transition: all 0.2s;
  font-family: inherit;
}

.opening-card.is-complete {
  border-color: rgba(34, 197, 94, 0.55);
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.25), 0 6px 18px rgba(34, 197, 94, 0.08);
}

.opening-card__check {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #22c55e;
  color: #052712;
  display: flex;
  align-items: center;
  justify-content: center;
}
.opening-card__check svg { width: 16px; height: 16px; }

.opening-card__progress {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: var(--f-display);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--c-gold-deep);
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--c-border);
  border-radius: 999px;
  padding: 3px 8px;
  font-weight: 600;
}

.opening-card:hover {
  border-color: var(--c-border-strong);
  background: linear-gradient(160deg, rgba(40, 74, 75, 0.75), rgba(21, 41, 42, 0.75));
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}

.opening-card__name {
  font-family: var(--f-display);
  font-size: 17px;
  letter-spacing: 0.1em;
  color: var(--c-gold-bright);
  margin: 0 0 8px;
  font-weight: 600;
}

.opening-card__desc {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-text);
  margin: 0 0 14px;
}

.opening-card__cta {
  font-family: var(--f-display);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold-spark);
}

/* ===== Variation picker pills =====
   Sits above the walkthrough board. Each pill represents one sub-line of the
   opening (e.g. Italian Game -> Giuoco Piano / Two Knights / Evans Gambit).
   Horizontally scrollable on narrow screens so all variations stay reachable
   on phones. */
.walkthrough__variations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  max-width: 1100px;
  margin: 0 auto 16px;
  padding: 0 16px;
}

@media (max-width: 600px) {
  .walkthrough__variations {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding: 0 16px 4px;
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
  }
}

.walkthrough__variation-pill {
  flex-shrink: 0;
  background: rgba(15, 28, 32, 0.6);
  border: 1px solid var(--c-border);
  color: var(--c-text);
  font-family: var(--f-display);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s;
  min-height: 36px;
}

.walkthrough__variation-pill:hover,
.walkthrough__variation-pill:focus-visible {
  border-color: var(--c-border-strong);
  background: rgba(40, 70, 75, 0.65);
  outline: none;
}

.walkthrough__variation-pill.is-active {
  background: rgba(255, 200, 100, 0.15);
  border-color: var(--c-gold-spark);
  color: var(--c-gold-bright);
}

.walkthrough__variation-pill.is-done {
  border-color: rgba(34, 197, 94, 0.5);
}

.walkthrough__variation-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  margin-right: 6px;
  color: #22c55e;
  vertical-align: middle;
}
.walkthrough__variation-check svg { width: 14px; height: 14px; }

/* ===== Learn / Practice mode toggle ===== */
.walkthrough__mode-toggle {
  display: flex;
  gap: 0;
  max-width: 240px;
  margin: 0 auto 18px;
  padding: 0 16px;
  justify-content: center;
}
.walkthrough__mode-btn {
  flex: 1;
  background: rgba(15, 28, 32, 0.5);
  border: 1px solid var(--c-border);
  color: var(--c-text-dim);
  font-family: var(--f-display);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 9px 14px;
  cursor: pointer;
  transition: all 0.15s;
}
.walkthrough__mode-btn:first-child { border-radius: 6px 0 0 6px; }
.walkthrough__mode-btn:last-child { border-radius: 0 6px 6px 0; margin-left: -1px; }
.walkthrough__mode-btn:hover { border-color: var(--c-border-strong); color: var(--c-text); }
.walkthrough__mode-btn.is-active {
  background: rgba(255, 200, 100, 0.15);
  border-color: var(--c-gold-spark);
  color: var(--c-gold-bright);
}

/* ===== Walkthrough ===== */
.walkthrough {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px 60px;
}

@media (max-width: 900px) {
  .walkthrough {
    grid-template-columns: 1fr;
  }
}

.walkthrough__board-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.walkthrough__frame {
  width: min(70vh, 80vw, 540px);
}

.walkthrough__controls {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.walkthrough__controls .btn {
  padding: 10px 18px;
  font-size: 12px;
}

.walkthrough__controls .btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

/* ===== Pawn Coach ===== */
.coach {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.coach__avatar {
  flex-shrink: 0;
  width: 80px;
  height: 110px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.coach__avatar img {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.55)) drop-shadow(0 0 14px rgba(255, 200, 100, 0.2));
}

.coach__bubble {
  flex: 1;
  background: linear-gradient(160deg, rgba(31, 58, 59, 0.92), rgba(13, 31, 32, 0.92));
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 14px 16px;
  position: relative;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.4);
}

.coach__bubble::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 28px;
  width: 12px;
  height: 12px;
  background: linear-gradient(160deg, #1f3a3b, #0d1f20);
  border-left: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  transform: rotate(45deg);
}

.coach__move {
  font-family: var(--f-display);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold-deep);
  margin-bottom: 6px;
}

.coach__text {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--c-text);
  margin: 0;
}

.coach__text code {
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 12.5px;
  background: rgba(255, 200, 100, 0.12);
  border: 1px solid rgba(255, 200, 100, 0.3);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--c-gold-bright);
}

.coach__text strong {
  color: var(--c-gold-bright);
  font-weight: 600;
}