/**
 * @file css/components.css
 * Reusable UI components: 3D beveled studio tiles, analogue/digital clock,
 * buttons, segmented controls, calculation board, Dictionary Corner, modals, toasts.
 */

/* Buttons (Single-line controls, min 44x44px touch targets on mobile) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
  user-select: none;
}

.btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.985);
}

.btn--primary {
  background: var(--accent-primary);
  color: var(--text-on-accent);
  font-weight: 700;
  box-shadow: var(--shadow-sm);
}

.btn--primary:hover:not(:disabled) {
  background: var(--accent-primary-hover);
}

.btn--royal {
  background: var(--accent-royal);
  color: #FFFFFF;
  border: 1px solid var(--border-strong);
}

.btn--royal:hover:not(:disabled) {
  background: #1D4ED8;
}

.btn--secondary {
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn--secondary:hover:not(:disabled) {
  border-color: var(--border-strong);
  background: #1E346B;
}

.btn--danger {
  background: var(--status-invalid-bg);
  color: #FCA5A5;
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.btn--danger:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.28);
}

.btn--sm {
  min-height: 36px;
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
}

.btn--lg {
  min-height: 52px;
  padding: 0.75rem 1.5rem;
  font-size: 1.0625rem;
}

/* Segmented Controls (Interactive Filter / Drill Tabs) */
.segmented-control {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
  max-width: 100%;
}

.segmented-control__btn {
  min-height: 38px;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.segmented-control__btn[aria-pressed="true"],
.segmented-control__btn.is-active {
  background: var(--accent-primary);
  color: var(--text-on-accent);
  font-weight: 700;
}

/* Surface Panels (Single-level elevation) */
.panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.panel--subtle {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

/* 3D Beveled Studio Tiles (Letters, Numbers, Conundrum) */
.tile-row {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: clamp(0.35rem, 1vw, 0.75rem);
  width: 100%;
  perspective: 1000px;
}

.tile-row--numbers {
  grid-template-columns: repeat(6, minmax(0, 1fr));
  max-width: 720px;
  margin: 0 auto;
}

.tile {
  position: relative;
  aspect-ratio: 1 / 1.08;
  min-height: 52px;
  border-radius: var(--radius-md);
  transform-style: preserve-3d;
  transition: transform var(--duration-flip) var(--ease-flip),
              opacity var(--duration-fast) var(--ease-out);
  user-select: none;
}

.tile--interactive {
  cursor: pointer;
}

.tile--interactive:hover:not(.tile--used):not(:disabled) {
  transform: translateY(-4px);
}

.tile--used {
  opacity: 0.32;
  transform: scale(0.95);
}

.tile__face {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.tile__face--back {
  background: var(--tile-empty-bg);
  border: 2px dashed var(--tile-empty-border);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.tile__face--front {
  background: linear-gradient(180deg, var(--tile-letter-top) 0%, var(--tile-letter-bottom) 100%);
  border: 2px solid var(--tile-letter-border);
  box-shadow: var(--shadow-tile);
  color: var(--tile-letter-text);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.6vw, 2.5rem);
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

/* Subtle studio gloss across top half of tile */
.tile__face--front::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 46%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.02) 100%);
  pointer-events: none;
}

.tile--number .tile__face--front {
  background: linear-gradient(180deg, var(--tile-number-top) 0%, var(--tile-number-bottom) 100%);
  border-color: var(--tile-number-border);
  font-family: var(--font-condensed);
  font-size: clamp(1.4rem, 3.8vw, 2.6rem);
  letter-spacing: -0.02em;
}

.tile--conundrum .tile__face--front {
  background: linear-gradient(180deg, var(--tile-conundrum-top) 0%, var(--tile-conundrum-bottom) 100%);
  border-color: var(--tile-conundrum-border);
  color: var(--tile-conundrum-text);
}

.tile.is-unrevealed .tile__face--front {
  transform: rotateX(180deg);
}

.tile.is-revealed {
  transform: rotateX(0deg);
}

/* 3-Digit Target Display (Slot Machine Roll) */
.target-box {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 1.75rem;
  background: #050B18;
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--glow-gold), inset 0 2px 10px rgba(0, 0, 0, 0.8);
}

.target-box__label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent-primary);
  margin-bottom: 0.125rem;
}

.target-box__value {
  font-family: var(--font-mono);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.05;
  color: #FDE68A;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

/* Analogue + Digital Studio Clock */
.clock-widget {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.625rem;
}

.clock-svg {
  width: clamp(160px, 22vw, 240px);
  height: clamp(160px, 22vw, 240px);
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.55));
}

.clock-digital {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

/* Word Builder Tray */
.word-tray {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 68px;
  padding: var(--space-3) var(--space-4);
  background: rgba(5, 11, 28, 0.65);
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-lg);
}

.word-tray__slot {
  width: clamp(36px, 7vw, 48px);
  height: clamp(42px, 8vw, 54px);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-primary);
}

.word-tray__slot--empty {
  background: rgba(15, 30, 66, 0.35);
  border: 1px dashed var(--border-subtle);
}

/* Interactive Numbers Calculation Board */
.calc-board {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.calc-operators {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

.calc-op-btn {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-elevated);
  border: 2px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--duration-fast) var(--ease-out),
              background-color var(--duration-fast) var(--ease-out);
}

.calc-op-btn[aria-pressed="true"],
.calc-op-btn.is-selected {
  background: var(--accent-primary);
  color: var(--text-on-accent);
  border-color: #FFFFFF;
}

.calc-steps {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 80px;
  padding: var(--space-3);
  background: rgba(5, 11, 28, 0.55);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
}

/* Dictionary Corner Panel */
.dict-corner {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-5);
  margin-top: var(--space-5);
}

.dict-word-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(135px, 1fr));
  gap: 0.625rem;
  margin-top: var(--space-3);
}

.dict-word-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  font-weight: 600;
  text-align: left;
}

.dict-word-btn:hover {
  border-color: var(--accent-primary);
}

/* Modal Overlay */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.78);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: var(--z-modal);
}

.modal-backdrop[hidden] {
  display: none !important;
}

.modal-card {
  width: 100%;
  max-width: 600px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}

/* Toast Notification Stack */
.toast-Region {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 360px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Form Controls */
.input-field {
  width: 100%;
  min-height: 44px;
  padding: 0.5rem 0.875rem;
  background: rgba(5, 11, 28, 0.7);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 1rem;
}

.input-field:focus {
  border-color: var(--accent-primary);
  outline: 2px solid var(--accent-primary);
}