/* ── Coin Flip Simulator — tool-specific styles ──────────────────────────────
   Global styles are inherited from /css/style.css.
   Colours reference CSS custom properties only — no hardcoded values.
   ─────────────────────────────────────────────────────────────────────────── */

.cf-flip-card,
.cf-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card, 8px);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.cf-card__heading {
  font-size: 1.05rem;
  margin: 0;
}

.cf-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ── Coin ─────────────────────────────────────────────────────────────── */

.cf-flip-stage {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.cf-coin-wrap {
  flex-shrink: 0;
  width: 180px;
  height: 180px;
  margin: 0 auto;
  perspective: 1000px;
}

.cf-coin {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transform: rotateY(0deg);
  will-change: transform;
}

.cf-coin__face {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  backface-visibility: hidden;
  border: 6px solid var(--accent);
  background: linear-gradient(145deg, var(--bg-card), var(--bg-input, var(--bg-card)));
  color: var(--text-primary);
  box-shadow:
    inset 0 0 0 2px var(--border-color),
    0 8px 20px rgba(0, 0, 0, 0.2);
}

.cf-coin__face--tails {
  transform: rotateY(180deg);
}

.cf-flip-side {
  flex: 1;
  min-width: 220px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.85rem;
}

.cf-flip-btn {
  font-size: 1.05rem;
  padding: 0.75rem 1.6rem;
}

.cf-flip-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.cf-result {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.85rem 1.1rem;
  border: 1px solid var(--accent);
  border-radius: var(--radius-card, 8px);
  background: var(--bg-input, var(--bg-card));
  width: 100%;
}

/* .cf-result sets display:flex, which overrides the UA [hidden]{display:none}
   rule, so this restores the hide behavior (same pattern as .ws-result in
   /wheel-spinner/style.css). */
.cf-result[hidden] {
  display: none;
}

.cf-result-label {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}

.cf-streak {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ── Multi-flip ───────────────────────────────────────────────────────── */

.cf-multi-hint {
  margin: -0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.cf-multi-row {
  display: flex;
  align-items: flex-end;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.cf-field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.cf-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.cf-multi-input {
  width: 8rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control, 8px);
  background: var(--bg-input, var(--bg-card));
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-mono, monospace);
}

.cf-multi-input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.cf-error {
  margin: 0;
  color: var(--color-danger, #ef4444);
  font-size: 0.875rem;
}

.cf-multi-result {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.cf-bar-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr auto;
  align-items: center;
  gap: 0.75rem;
}

.cf-bar-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.cf-bar-track {
  height: 0.6rem;
  border-radius: 999px;
  background: var(--bg-input, var(--bg-card));
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.cf-bar-fill {
  height: 100%;
  width: 0%;
  transition: width 0.4s ease;
}

.cf-bar-fill--heads {
  background: var(--accent);
}

.cf-bar-fill--tails {
  background: var(--text-secondary);
}

.cf-bar-value {
  font-size: 0.85rem;
  font-family: var(--font-mono, monospace);
  color: var(--text-primary);
  white-space: nowrap;
}

/* ── History ──────────────────────────────────────────────────────────── */

.cf-checkbox {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  cursor: pointer;
}

.cf-history-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cf-history-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control, 8px);
  background: var(--bg-input, var(--bg-card));
  font-size: 0.9rem;
}

.cf-history-list .cf-history-name {
  font-weight: 600;
  word-break: break-word;
}

.cf-history-list .cf-history-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono, monospace);
  white-space: nowrap;
}

.cf-empty {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-align: center;
  padding: 1rem 0;
}

.cf-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ── Uses grid ────────────────────────────────────────────────────────── */

.cf-uses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.cf-uses-grid article h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.cf-uses-grid article p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .cf-flip-stage {
    flex-direction: column;
  }
  .cf-flip-side {
    align-items: stretch;
    text-align: center;
  }
  .cf-flip-side .cf-flip-btn {
    width: 100%;
  }
  .cf-bar-row {
    grid-template-columns: 3rem 1fr auto;
  }
}