/* Patience (Royal Gaps) — Styles */

:root {
  --bg: #1a1f2e;
  --board-bg: #2a3042;
  --card-bg: #f5f0e8;
  --card-border: #d4cfc5;
  --card-shadow: rgba(0, 0, 0, 0.25);
  --gap-bg: rgba(255, 255, 255, 0.06);
  --gap-border: rgba(255, 255, 255, 0.15);
  --dead-gap-bg: rgba(255, 60, 60, 0.08);
  --dead-gap-border: rgba(255, 60, 60, 0.3);
  --valid-gap-bg: rgba(100, 255, 100, 0.12);
  --valid-gap-border: rgba(100, 255, 100, 0.5);
  --movable-glow: rgba(0, 210, 255, 1.0);
  --selected-glow: rgba(255, 220, 50, 0.8);
  --locked-bg: #e8e4d8;
  --locked-border: #b8b4a8;
  --red: #d63031;
  --black: #2d3436;
  --accent: #6c5ce7;
  --text: #dfe6e9;
  --text-muted: #b2bec3;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 1rem;
  padding-top: max(0.75rem, env(safe-area-inset-top));
}

/* Confetti canvas */
#confetti-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 500;
}

/* Top bar */
.top-bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  max-width: 1100px;
  margin-bottom: 0.5rem;
  flex-shrink: 0;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

.top-bar h1 {
  font-family: 'Coustard', serif;
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--text);
  white-space: nowrap;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

/* Status bar — centred in top-bar */
.status-bar {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.85rem;
  pointer-events: none;
}

.status-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  white-space: nowrap;
}

.status-label {
  color: var(--text-muted);
}

.status-value {
  color: var(--text);
  font-weight: 600;
}


button {
  font-family: inherit;
  padding: 0.5rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 0.85rem;
  line-height: 1;
  cursor: pointer;
  transition: all 0.2s;
}

button:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.35);
}

button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
}

button.primary:hover:not(:disabled) {
  background: #7c6cf7;
}

/* Share button */
.share-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.9rem;
}

.share-btn svg {
  flex-shrink: 0;
}

/* Game area — centers board vertically */
.game-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 1100px;
  min-height: 0;
}

/* Board */
#board {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 6px;
  padding: 1rem;
  background: var(--board-bg);
  border-radius: 12px;
  width: 100%;
  touch-action: none;
}

/* Cell (common) */
.cell {
  aspect-ratio: 5 / 7;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.7rem, 2vw, 1rem);
  transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
  position: relative;
  user-select: none;
}

/* Card */
.cell.card {
  background: var(--card-bg);
  border: 1.5px solid var(--card-border);
  box-shadow: 0 2px 4px var(--card-shadow);
  cursor: pointer;
}

.cell.card.locked {
  cursor: default;
}

.cell.card.movable {
  cursor: grab;
  box-shadow: 0 0 14px var(--movable-glow), 0 2px 4px var(--card-shadow);
  border-color: rgba(0, 210, 255, 0.75);
}

body.light-mode .cell.card.movable {
  border-color: rgba(0, 140, 255, 0.65);
}

.cell.card.movable:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 24px var(--movable-glow), 0 6px 12px var(--card-shadow);
}

.cell.card.selected {
  box-shadow: 0 0 16px var(--selected-glow), 0 6px 12px var(--card-shadow);
  border-color: rgba(255, 220, 50, 0.85);
  transform: translateY(-6px) scale(1.04);
  z-index: 10;
  cursor: grab;
}

.cell.card.dragging {
  opacity: 0.35;
  transform: scale(0.95);
  cursor: grabbing;
}

.cell.card.dimmed {
  opacity: 0.45;
}

.cell.card.locked {
  background: var(--locked-bg);
  border-color: var(--locked-border);
  opacity: 0.75;
}

/* Card colors */
.cell.card.red .card-rank,
.cell.card.red .card-suit {
  color: var(--red);
}

.cell.card.black .card-rank,
.cell.card.black .card-suit {
  color: var(--black);
}

.card-rank {
  font-size: 1.3em;
  font-weight: 700;
  line-height: 1;
}

.card-suit {
  font-size: 1.75em;
  line-height: 1;
  margin-top: 2px;
}

/* Gap */
.cell.gap {
  background: var(--gap-bg);
  border: 1.5px dashed var(--gap-border);
  cursor: default;
}

.cell.gap.valid-gap {
  background: var(--valid-gap-bg);
  border-color: var(--valid-gap-border);
  animation: pulse-gap 2s ease-in-out infinite;
}

/* Target gap: selected card can go here — brighter highlight */
.cell.gap.target-gap {
  background: rgba(100, 255, 100, 0.2);
  border-color: rgba(100, 255, 100, 0.9);
  border-style: solid;
  cursor: pointer;
  animation: pulse-target 0.9s ease-in-out infinite;
}

.cell.gap.incompatible-gap {
  opacity: 0.4;
}

.cell.gap.drag-over {
  background: rgba(100, 255, 100, 0.35);
  border-color: rgba(100, 255, 100, 1);
  border-style: solid;
  transform: scale(1.05);
}

.cell.gap.dead-gap {
  background: var(--dead-gap-bg);
  border-color: var(--dead-gap-border);
  cursor: not-allowed;
}

.dead-icon {
  color: rgba(255, 60, 60, 0.4);
  font-size: 1.2em;
}

@keyframes pulse-gap {
  0%, 100% { border-color: var(--valid-gap-border); background: var(--valid-gap-bg); }
  50% { border-color: rgba(100, 255, 100, 0.15); background: transparent; }
}

@keyframes pulse-target {
  0%, 100% { box-shadow: 0 0 8px rgba(100, 255, 100, 0.6); }
  50% { box-shadow: 0 0 20px rgba(100, 255, 100, 0.9); }
}

.cell.gap.invalid-target {
  animation: shake-invalid 0.38s ease forwards !important;
}

@keyframes shake-invalid {
  0%   { transform: translateX(0);    background: rgba(255, 70, 70, 0.18); border-color: rgba(255, 70, 70, 0.8); }
  22%  { transform: translateX(-4px); background: rgba(255, 70, 70, 0.22); }
  44%  { transform: translateX(4px);  border-color: rgba(255, 70, 70, 1.0); }
  66%  { transform: translateX(-3px); }
  88%  { transform: translateX(2px);  background: rgba(255, 70, 70, 0.1); }
  100% { transform: translateX(0);    background: var(--gap-bg); border-color: var(--gap-border); }
}

/* Floating card (used during animations) */
.floating-card {
  border-radius: 6px;
  background: var(--card-bg);
  border: 1.5px solid var(--card-border);
  box-shadow: 0 8px 20px rgba(0,0,0,0.4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: clamp(0.7rem, 2vw, 1rem);
}

/* Sequence-bob animation – plays on correctly sequenced cards at end of each go */
@keyframes sequence-bob {
  0%   { transform: translateY(0) scale(1); }
  35%  { transform: translateY(-12px) scale(1.1); }
  65%  { transform: translateY(-12px) scale(1.1); }
  100% { transform: translateY(0) scale(1); }
}

.cell.card.sequence-bob {
  animation: sequence-bob 0.45s ease-in-out both;
  position: relative;
  z-index: 2;
}

/* Deal-in animation */
@keyframes deal-in {
  from {
    opacity: 0;
    transform: translateY(-28px) scale(0.88);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.cell.card.deal-in {
  animation: deal-in 0.32s ease-out both;
}

/* Message bar (redeal prompt) — modal overlay */
.message-bar {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 200;
}

.message-bar.visible {
  opacity: 1;
  pointer-events: all;
}

.message-bar-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem 2rem;
  background: var(--board-bg);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text);
  font-size: 0.95rem;
  text-align: center;
  max-width: min(90vw, 380px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body.light-mode .message-bar-box {
  background: #e8e4f4;
  border-color: rgba(0, 0, 0, 0.1);
}

.redeal-progress {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.redeal-score-value {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text);
}

.redeal-score-label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Toast message (share feedback etc.) */
#message {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  background: rgba(255, 200, 50, 0.12);
  border: 1px solid rgba(255, 200, 50, 0.3);
  color: #ffd866;
  font-size: 0.85rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 50;
}

#message.visible {
  opacity: 1;
}

/* Overlay */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.overlay.visible {
  opacity: 1;
  pointer-events: all;
}

.overlay-content {
  background: var(--board-bg);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 2.5rem;
  text-align: center;
  max-width: 400px;
  position: relative;
}

.overlay.visible .overlay-content {
  animation: overlay-enter 0.45s cubic-bezier(0.34, 1.4, 0.64, 1) forwards;
}

@keyframes overlay-enter {
  from {
    opacity: 0;
    transform: scale(0.88) translateY(18px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.overlay-close-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}

.overlay-close-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
}

body.light-mode .overlay-close-btn:hover {
  background: rgba(0, 0, 0, 0.08);
}

.overlay-content h2 {
  font-family: 'Coustard', serif;
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.overlay-content p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.overlay-score {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  margin-bottom: 1.25rem;
}

.score-value {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--text);
  line-height: 1;
}

.score-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.overlay-details {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.detail-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
}

.detail-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.detail-value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.overlay-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding: 0.75rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

body.light-mode .overlay-stats {
  border-color: rgba(0, 0, 0, 0.1);
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.stat-value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.stat-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.overlay-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

/* View Result floating button */
.view-result-btn {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #fff;
  padding: 0.6rem 1.5rem;
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: pointer;
  z-index: 50;
  transition: background 0.2s;
}

.view-result-btn:hover:not(:disabled) {
  background: #7c6cf7;
}

body.light-mode .view-result-btn {
  background: #e6e2da;
  color: var(--text);
}

body.light-mode .view-result-btn:hover:not(:disabled) {
  background: #e6e2da;
}

.overlay-share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.overlay-share-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.15);
}

.overlay-share-btn.copied {
  background: rgba(255, 255, 255, 0.15);
}

#overlay-btn {
  width: 100%;
}

/* =====================
   Light Mode
   ===================== */
body.light-mode {
  --bg: #f4f0e8;
  --board-bg: #e4dfd4;
  --card-bg: #ffffff;
  --card-border: #c8c2b8;
  --card-shadow: rgba(0, 0, 0, 0.12);
  --gap-bg: rgba(0, 0, 0, 0.04);
  --gap-border: rgba(0, 0, 0, 0.18);
  --dead-gap-bg: rgba(220, 50, 50, 0.07);
  --dead-gap-border: rgba(220, 50, 50, 0.35);
  --valid-gap-bg: rgba(30, 160, 30, 0.1);
  --valid-gap-border: rgba(30, 160, 30, 0.5);
  --movable-glow: rgba(0, 140, 255, 0.85);
  --selected-glow: rgba(230, 160, 0, 0.8);
  --locked-bg: #ede9de;
  --locked-border: #b8b4a8;
  --red: #c0392b;
  --black: #1a1a2e;
  --accent: #5a4fcf;
  --text: #1a1a2e;
  --text-muted: #5a6470;
}

body.light-mode button {
  border-color: rgba(0, 0, 0, 0.2);
  background: rgba(0, 0, 0, 0.06);
  color: var(--text);
}

body.light-mode button:hover:not(:disabled) {
  background: rgba(0, 0, 0, 0.12);
  border-color: rgba(0, 0, 0, 0.3);
}

body.light-mode button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* =====================
   Settings button
   ===================== */
.icon-btn {
  padding: 0.5rem 0.7rem;
  font-size: 1.05rem;
}

/* =====================
   Settings sidebar
   ===================== */
.settings-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.settings-backdrop.open {
  opacity: 1;
  pointer-events: all;
}

.settings-sidebar {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: 320px;
  max-width: 90vw;
  background: var(--board-bg);
  border-left: 1px solid rgba(255, 255, 255, 0.12);
  z-index: 201;
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

body.light-mode .settings-sidebar {
  border-left-color: rgba(0, 0, 0, 0.12);
}

.settings-sidebar.open {
  transform: translateX(0);
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

body.light-mode .settings-header {
  border-bottom-color: rgba(0, 0, 0, 0.1);
}

.settings-header h3 {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text);
}

.settings-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 4px;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}

.settings-close-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
}

body.light-mode .settings-close-btn:hover {
  background: rgba(0, 0, 0, 0.08);
}

.settings-body {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 0;
}

.settings-group-title {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0.75rem 1.25rem 0.35rem;
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.7rem 1.25rem;
}

.settings-row-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  flex: 1;
  min-width: 0;
}

.settings-label {
  font-size: 0.9rem;
  color: var(--text);
  font-weight: 500;
}

.settings-hint {
  font-size: 0.73rem;
  color: var(--text-muted);
  line-height: 1.4;
}

/* Toggle switch */
.toggle-switch {
  flex-shrink: 0;
  cursor: pointer;
  display: inline-block;
}

.toggle-switch input {
  display: none;
}

.toggle-track {
  display: block;
  width: 42px;
  height: 24px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.2);
  position: relative;
  transition: background 0.2s, border-color 0.2s;
}

body.light-mode .toggle-track {
  background: rgba(0, 0, 0, 0.12);
  border-color: rgba(0, 0, 0, 0.2);
}

.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform 0.2s, background 0.2s;
}

.toggle-switch input:checked + .toggle-track {
  background: var(--accent);
  border-color: var(--accent);
}

.toggle-switch input:checked + .toggle-track::after {
  transform: translateX(18px);
  background: #fff;
}

/* Settings action row (tutorial button) */
.settings-row-action {
  flex-direction: row;
  align-items: center;
}

.settings-action-btn {
  flex-shrink: 0;
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  border: 1px solid var(--accent);
  transition: background 0.2s;
}

.settings-action-btn:hover {
  background: #7c6cf7;
}

.settings-footer {
  padding: 0.75rem 1.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.settings-footer-copyright {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.45;
}

.settings-footer a {
  font-size: 0.85rem;
  color: var(--text-muted);
  opacity: 0.5;
  text-decoration: none;
  transition: opacity 0.2s, color 0.2s;
}

.settings-footer a:hover {
  opacity: 0.8;
  color: var(--text);
}

body.light-mode .settings-footer {
  border-top-color: rgba(0, 0, 0, 0.06);
}

/* =====================
   Tutorial overlay
   ===================== */
.tutorial-overlay {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  padding: 1rem;
  z-index: 300;
  pointer-events: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.25s, transform 0.25s;
}

.tutorial-overlay.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: all;
}

.tutorial-card {
  background: var(--board-bg);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 14px;
  padding: 1.25rem 1.5rem 1rem;
  max-width: 560px;
  width: 100%;
  box-shadow: 0 -4px 32px rgba(0, 0, 0, 0.45);
}

body.light-mode .tutorial-card {
  border-color: rgba(0, 0, 0, 0.12);
  box-shadow: 0 -4px 32px rgba(0, 0, 0, 0.18);
}

.tutorial-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.tutorial-progress {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.tutorial-close-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  transition: color 0.15s;
  font-family: inherit;
}

.tutorial-close-btn:hover {
  color: var(--text);
}

.tutorial-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.tutorial-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.tutorial-help-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.55;
  background: rgba(108, 92, 231, 0.1);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 0.55rem 0.75rem;
  margin-bottom: 1rem;
}

body.light-mode .tutorial-help-text {
  background: rgba(108, 92, 231, 0.07);
}

.tutorial-nav {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.tutorial-nav-btn {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  transition: background 0.15s;
}

body.light-mode .tutorial-nav-btn {
  border-color: rgba(0, 0, 0, 0.18);
  background: rgba(0, 0, 0, 0.05);
}

.tutorial-nav-btn:hover {
  background: rgba(255, 255, 255, 0.13);
}

body.light-mode .tutorial-nav-btn:hover {
  background: rgba(0, 0, 0, 0.1);
}

.tutorial-nav-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.tutorial-nav-primary:hover {
  background: #7c6cf7 !important;
}

/* =====================
   Responsive
   ===================== */
@media (max-width: 600px) {
  body {
    padding: 0.75rem;
    padding-top: max(0.75rem, env(safe-area-inset-top));
  }

  .top-bar {
    gap: 0.5rem;
  }

  .top-bar-left {
    gap: 0.5rem;
  }

  .top-bar h1 {
    font-size: 1.3rem;
  }

  #board {
    gap: 3px;
    padding: 0.5rem;
  }

  .cell {
    border-radius: 4px;
  }

  .card-rank {
    font-size: 1.1em;
  }

  .card-suit {
    font-size: 1.4em;
  }

  .status-bar {
    gap: 0.6rem;
    font-size: 0.75rem;
  }

  button {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
  }

  .icon-btn {
    padding: 0.4rem 0.6rem;
    font-size: 1.15rem;
  }

  .site-footer {
    display: none;
  }
}

/* Mobile / tablet landscape — fit all cards in viewport without scrolling */
@media (orientation: landscape) and (max-height: 480px) {
  body {
    height: 100dvh;
    overflow: hidden;
    padding: 0.2rem 0.75rem;
  }

  .top-bar {
    margin-bottom: 0.2rem;
  }

  .game-area {
    justify-content: flex-start;
  }

  #board {
    padding: 0.3rem;
    gap: 2px;
    /* Drive column width from available height so 4 rows always fit.
       Available ≈ 100dvh minus body padding (~6px) and top-bar (~44px). */
    grid-template-columns: repeat(10, calc((100dvh - 70px) / 4 * 5 / 7));
    width: auto;
    margin: 0 auto;
  }

  .cell {
    font-size: clamp(0.4rem, 1.8dvh, 0.8rem);
    border-radius: 3px;
  }

  .status-bar {
    font-size: 0.75rem;
    gap: 0.75rem;
  }

  button {
    padding: 0.35rem 0.7rem;
    font-size: 0.78rem;
  }
}

/* Mode badge (Unlimited) */
.mode-badge {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: #3b82f6;
  color: #fff;
  padding: 2px 8px;
  border-radius: 20px;
  align-self: center;
  flex-shrink: 0;
}

/* Ace card — slightly dimmed while on board before removal animation */
.cell.ace-card {
  opacity: 0.85;
}

/* =====================
   Footer
   ===================== */
.site-footer {
  margin-top: 1rem;
  padding: 0.75rem 0;
  text-align: center;
  font-size: 0.65rem;
  color: var(--text-muted);
  opacity: 0.45;
  flex-shrink: 0;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
  transition: opacity 0.2s, color 0.2s;
}

.site-footer a:hover {
  opacity: 1;
  color: var(--text);
}

/* =====================
   Portrait Columns — transpose rows↔columns on mobile portrait
   ===================== */
@media (orientation: portrait) and (max-width: 600px) {
  body.portrait-columns {
    height: 100dvh;
    overflow: hidden;
    padding-top: max(0.2rem, env(safe-area-inset-top));
  }

  body.portrait-columns #board {
    /* Drive column width from viewport height so all 10 rows always fit on screen.
       Available ≈ 100dvh minus safe-area-inset-top, body padding, top-bar, board padding/gaps. */
    grid-template-columns: repeat(4, calc((100dvh - env(safe-area-inset-top) - 105px) / 10 * 5 / 7));
    grid-template-rows: repeat(10, auto);
    width: auto;
    margin: 0 auto;
  }

  /* Map data-row → visual column */
  body.portrait-columns .cell[data-row="0"] { grid-column: 1; }
  body.portrait-columns .cell[data-row="1"] { grid-column: 2; }
  body.portrait-columns .cell[data-row="2"] { grid-column: 3; }
  body.portrait-columns .cell[data-row="3"] { grid-column: 4; }

  /* Map data-col → visual row */
  body.portrait-columns .cell[data-col="0"] { grid-row: 1; }
  body.portrait-columns .cell[data-col="1"] { grid-row: 2; }
  body.portrait-columns .cell[data-col="2"] { grid-row: 3; }
  body.portrait-columns .cell[data-col="3"] { grid-row: 4; }
  body.portrait-columns .cell[data-col="4"] { grid-row: 5; }
  body.portrait-columns .cell[data-col="5"] { grid-row: 6; }
  body.portrait-columns .cell[data-col="6"] { grid-row: 7; }
  body.portrait-columns .cell[data-col="7"] { grid-row: 8; }
  body.portrait-columns .cell[data-col="8"] { grid-row: 9; }
  body.portrait-columns .cell[data-col="9"] { grid-row: 10; }

  body.portrait-columns .cell {
    aspect-ratio: 5 / 7;
    /* Scale text with viewport height so it's readable at any phone size */
    font-size: clamp(0.55rem, 1.6dvh, 0.9rem);
  }

  body.portrait-columns .card-rank {
    font-size: 1.5em;
  }

  body.portrait-columns .card-suit {
    font-size: 2em;
  }
}