/* Probability Playground — Custom Styles */

/* ---- Tabs ---- */
.prob-tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border-light);
  margin-bottom: 24px;
}

.prob-tab {
  padding: 10px 22px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.prob-tab:hover {
  color: var(--color-text-secondary);
}

.prob-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.prob-mode.hidden {
  display: none;
}

/* ---- Arena (central interactive area) ---- */
.prob-arena {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  padding: 32px 0;
}

/* ---- Coin (CSS 3D flip) ---- */
.coin-stage {
  perspective: 600px;
  width: 140px;
  height: 140px;
}

.coin {
  width: 140px;
  height: 140px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.15s ease;
}

.coin-face {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 800;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  box-shadow: var(--shadow-md), inset 0 2px 4px rgba(255, 255, 255, 0.25);
}

.coin-heads {
  background: linear-gradient(145deg, #f59e0b, #d97706);
  color: #fff;
  border: 3px solid #b45309;
}

.coin-tails {
  background: linear-gradient(145deg, #6366f1, #4f46e5);
  color: #fff;
  border: 3px solid #3730a3;
  transform: rotateY(180deg);
}

.coin.show-heads {
  transform: rotateY(0deg);
}

.coin.show-tails {
  transform: rotateY(180deg);
}

.coin.flipping {
  animation: coinFlip 600ms ease-in-out;
}

@keyframes coinFlip {
  0%   { transform: rotateY(0deg); }
  100% { transform: rotateY(1800deg); }
}

/* ---- Result display ---- */
.prob-result {
  font-size: 1.4rem;
  font-weight: 700;
  text-align: center;
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.result-heads {
  color: #d97706;
}

.result-tails {
  color: #4f46e5;
}

.result-dice {
  color: var(--color-primary);
}

/* ---- Action buttons ---- */
.prob-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---- Stats panel ---- */
.prob-stats {
  margin-top: 24px;
  padding: 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
}

.prob-stat-row {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.prob-stat-row:last-child {
  margin-bottom: 0;
}

.prob-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.prob-stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.prob-stat-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* ---- Probability comparison bars ---- */
.prob-bars {
  margin-bottom: 16px;
}

.prob-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.prob-bar:last-child {
  margin-bottom: 0;
}

.prob-bar-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-text-muted);
  min-width: 110px;
  text-align: right;
}

.prob-bar-track {
  flex: 1;
  height: 20px;
  background: var(--color-border-light);
  border-radius: 10px;
  overflow: hidden;
}

.prob-bar-fill {
  height: 100%;
  border-radius: 10px;
  transition: width 0.3s ease;
}

.prob-bar-expected {
  background: var(--color-primary-subtle);
}

.prob-bar-actual {
  background: var(--color-primary);
}

.prob-bar-pct {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  min-width: 45px;
  color: var(--color-text);
}

/* ---- Convergence note ---- */
.prob-convergence-note {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
  line-height: 1.5;
  margin: 16px 0 12px;
}

/* ---- Dice count selector ---- */
.dice-count-selector {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dice-count-selector label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-secondary);
}

.dice-count-btns {
  display: flex;
  gap: 4px;
}

.dice-count-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.dice-count-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.dice-count-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

/* ---- Birthday controls ---- */
.birthday-size-selector {
  width: min(560px, 100%);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.birthday-size-selector label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text-secondary);
}

.birthday-size-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.birthday-size-controls input[type="range"] {
  flex: 1;
}

.birthday-size-controls input[type="number"] {
  width: 72px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 6px 8px;
}

.birthday-presets {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.birthday-preset-btn {
  min-width: 48px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0 12px;
  transition: all var(--transition-fast);
}

.birthday-preset-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.birthday-preset-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.birthday-stage {
  width: min(760px, 100%);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
  padding: 12px;
}

.birthday-stage-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.birthday-room-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.birthday-room-match {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text-muted);
}

.birthday-room-match.has-match {
  color: #059669;
}

.birthday-room-match.no-match {
  color: #c2410c;
}

.birthday-room {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(74px, 1fr));
  gap: 8px;
  max-height: 280px;
  overflow-y: auto;
  padding: 2px;
}

.birthday-person {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  padding: 7px 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 54px;
  box-shadow: var(--shadow-sm);
}

.birthday-person-index {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--color-text-muted);
  line-height: 1;
}

.birthday-person-day {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-text-secondary);
  line-height: 1.1;
}

.birthday-person.is-match {
  border-color: #059669;
  background: #ecfdf5;
}

.birthday-person.is-match .birthday-person-day {
  color: #047857;
}

.birthday-room-animating .birthday-person {
  opacity: 0;
  transform: translateY(8px) scale(0.96);
  animation: birthdayPersonIn 360ms ease forwards;
  animation-delay: var(--reveal-delay, 0ms);
}

.birthday-room-empty {
  grid-column: 1 / -1;
  margin: 0;
  padding: 20px 12px;
  text-align: center;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  font-style: italic;
}

@keyframes birthdayPersonIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.prob-bar-actual-birthday {
  background: #059669;
}

.result-match {
  color: #059669;
}

.result-no-match {
  color: #c2410c;
}

/* ---- Dice stage and die faces ---- */
.dice-stage {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.die {
  width: 72px;
  height: 72px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.die[data-value="1"] {
  display: flex;
  align-items: center;
  justify-content: center;
}

.die[data-value="2"] {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.die[data-value="2"] .die-dot:first-child {
  align-self: flex-end;
}

.die[data-value="2"] .die-dot:last-child {
  align-self: flex-start;
}

.die[data-value="3"] {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.die[data-value="3"] .die-dot:first-child {
  align-self: flex-end;
}

.die[data-value="3"] .die-dot:nth-child(2) {
  align-self: center;
}

.die[data-value="3"] .die-dot:last-child {
  align-self: flex-start;
}

.die[data-value="4"] {
  display: grid;
  grid-template-columns: 1fr 1fr;
  place-items: center;
}

.die[data-value="5"] {
  display: grid;
  grid-template-columns: 1fr 1fr;
  place-items: center;
}

.die[data-value="5"] .die-dot:nth-child(5) {
  grid-column: 1 / -1;
}

.die[data-value="6"] {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  place-items: center;
}

.die-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-text);
}

/* ---- Histogram ---- */
.dice-histogram {
  margin-top: 16px;
}

.dice-histogram-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}

.hist-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.hist-row:last-child {
  margin-bottom: 0;
}

.hist-sum {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-text-muted);
  min-width: 24px;
  text-align: right;
}

.hist-bar-track {
  flex: 1;
  height: 14px;
  background: var(--color-border-light);
  border-radius: 7px;
  overflow: hidden;
}

.hist-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 7px;
  transition: width 0.3s ease;
  min-width: 2px;
}

.hist-count {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-muted);
  min-width: 30px;
}

/* ---- Toast ---- */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 500;
  z-index: 9999;
  opacity: 0;
  transform: translateY(12px);
  transition: all 250ms ease;
  pointer-events: none;
}

.toast-msg.show {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive: 768px ---- */
@media (max-width: 768px) {
  .coin-stage {
    width: 110px;
    height: 110px;
  }

  .coin {
    width: 110px;
    height: 110px;
  }

  .coin-face {
    font-size: 2rem;
  }

  .die {
    width: 56px;
    height: 56px;
    padding: 8px;
  }

  .die-dot {
    width: 9px;
    height: 9px;
  }

  .prob-stat-row {
    gap: 14px;
  }

  .prob-stat {
    min-width: calc(50% - 10px);
  }

  .prob-bar-label {
    min-width: 80px;
    font-size: 0.72rem;
  }

  .prob-result {
    font-size: 1.2rem;
  }
}

/* ---- Responsive: 480px ---- */
@media (max-width: 480px) {
  .prob-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .prob-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .dice-count-selector {
    flex-direction: column;
    gap: 8px;
  }

  .birthday-size-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .birthday-size-controls input[type="number"] {
    width: 100%;
  }

  .birthday-room {
    grid-template-columns: repeat(auto-fill, minmax(66px, 1fr));
    max-height: 240px;
  }

  .birthday-person {
    min-height: 50px;
    padding: 6px 5px;
  }

  .prob-bar {
    flex-wrap: wrap;
  }

  .prob-bar-label {
    min-width: 100%;
    text-align: left;
  }
}

/* ---- Reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .coin {
    transition: none;
  }

  .coin.flipping {
    animation: none;
  }

  .prob-bar-fill,
  .hist-bar-fill {
    transition: none;
  }

  .die {
    transition: none;
  }

  .birthday-room-animating .birthday-person {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .toast-msg {
    transition: none;
  }
}