/* ===== CSS Variables ===== */
:root {
  /* Light theme colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f5f5f5;
  --bg-tertiary: #e0e0e0;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-muted: #9e9e9e;
  --accent-color: #3498db;
  --accent-hover: #2980b9;
  --success-color: #27ae60;
  --error-color: #e74c3c;
  --warning-color: #f39c12;
  --border-color: #ddd;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --card-red: #e74c3c;
  --card-black: #2c3e50;
  --overlay-bg: rgba(0, 0, 0, 0.5);
}

/* Dark theme */
[data-theme="dark"] {
  --bg-primary: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-tertiary: #0f3460;
  --text-primary: #eaeaea;
  --text-secondary: #b0b0b0;
  --text-muted: #808080;
  --accent-color: #4fc3f7;
  --accent-hover: #29b6f6;
  --success-color: #66bb6a;
  --error-color: #ef5350;
  --warning-color: #ffca28;
  --border-color: #333;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --card-red: #ef5350;
  --card-black: #eceff1;
  --overlay-bg: rgba(0, 0, 0, 0.7);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.3s, color 0.3s;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-hover);
}

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

.page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Header ===== */
.header {
  background-color: var(--bg-secondary);
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.header-nav {
  display: flex;
  gap: 0.5rem;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  color: var(--accent-color);
  cursor: pointer;
  font-size: 1rem;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
}

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: var(--border-color);
}

.btn-success {
  background-color: var(--success-color);
  color: white;
}

.btn-danger {
  background-color: var(--error-color);
  color: white;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent-color);
  color: var(--accent-color);
}

.btn-outline:hover {
  background-color: var(--accent-color);
  color: white;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.25rem;
}

.btn-icon {
  padding: 0.5rem;
  border-radius: 50%;
  width: 40px;
  height: 40px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.form-input::placeholder {
  color: var(--text-muted);
}

/* ===== Cards ===== */
.card {
  background-color: var(--bg-secondary);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px var(--shadow-color);
}

.card-header {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
}

/* ===== Home Menu ===== */
.home-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
}

.home-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  text-align: center;
  color: var(--text-primary);
}

.home-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 3rem;
  text-align: center;
}

.menu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  width: 100%;
  max-width: 900px;
}

.menu-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  background-color: var(--bg-secondary);
  border-radius: 16px;
  text-decoration: none;
  color: var(--text-primary);
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px var(--shadow-color);
}

.menu-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow-color);
}

.menu-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.menu-label {
  font-size: 1.25rem;
  font-weight: 600;
}

.menu-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-align: center;
  margin-top: 0.5rem;
}

/* ===== Playing Card Styles ===== */
.playing-card {
  width: 120px;
  height: 168px;
  border-radius: 8px;
  background: white;
  border: 1px solid #ccc;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: bold;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
  position: relative;
  user-select: none;
}

.playing-card.red {
  color: var(--card-red);
}

.playing-card.black {
  color: var(--card-black);
}

.playing-card .card-rank {
  font-size: 2rem;
}

.playing-card .card-suit {
  font-size: 3rem;
}

.playing-card .corner {
  position: absolute;
  font-size: 0.9rem;
  line-height: 1;
}

.playing-card .corner-top {
  top: 8px;
  left: 8px;
  text-align: left;
}

.playing-card .corner-bottom {
  bottom: 8px;
  right: 8px;
  text-align: right;
  transform: rotate(180deg);
}

.playing-card .corner-rank {
  font-size: 1.2rem;
  font-weight: bold;
}

.playing-card .corner-suit {
  font-size: 1rem;
}

.playing-card.large {
  width: 180px;
  height: 252px;
}

.playing-card.large .card-suit {
  font-size: 5rem;
}

.playing-card.large .corner-rank {
  font-size: 1.5rem;
}

.playing-card.large .corner-suit {
  font-size: 1.2rem;
}

/* Card back */
.playing-card.back {
  background: linear-gradient(135deg, #2c3e50 25%, #34495e 25%, #34495e 50%, #2c3e50 50%, #2c3e50 75%, #34495e 75%);
  background-size: 20px 20px;
  border: 3px solid #2c3e50;
}

/* ===== Timer ===== */
.timer {
  font-family: 'Courier New', monospace;
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--text-primary);
  text-align: center;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  min-width: 200px;
}

.timer.large {
  font-size: 4rem;
}

/* ===== Progress ===== */
.progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background-color: var(--accent-color);
  transition: width 0.3s;
}

.progress-text {
  text-align: center;
  font-size: 1.1rem;
  margin-top: 0.5rem;
  color: var(--text-secondary);
}

/* ===== Card Memory Page ===== */
.card-memory-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  gap: 2rem;
}

.card-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.card-area {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.pao-info {
  background-color: var(--bg-secondary);
  padding: 1rem 2rem;
  border-radius: 8px;
  text-align: center;
}

.pao-info p {
  margin: 0.25rem 0;
  font-size: 1.1rem;
}

.pao-label {
  font-weight: bold;
  color: var(--accent-color);
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

.settings-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
}

.setting-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.setting-item label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.setting-item input[type="range"] {
  width: 100px;
}

/* ===== Number Memory Page ===== */
.number-memory-container {
  padding: 2rem;
}

.number-settings {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
}

.number-display {
  background-color: var(--bg-secondary);
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
  min-height: 200px;
}

.number-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-family: 'Courier New', monospace;
  font-size: 1.5rem;
  font-weight: bold;
}

.number-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.number-group {
  padding: 0.5rem;
  background-color: var(--bg-primary);
  border-radius: 4px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.number-group:hover {
  background-color: var(--bg-tertiary);
}

.number-group.masked {
  color: transparent;
  background-color: var(--bg-tertiary);
  user-select: none;
}

.number-group.revealed {
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

.number-group.correct {
  background-color: rgba(39, 174, 96, 0.3);
  color: var(--success-color);
}

.number-group.incorrect {
  background-color: rgba(231, 76, 60, 0.3);
  color: var(--error-color);
}

.recall-input {
  width: 100%;
  min-height: 150px;
  font-family: 'Courier New', monospace;
  font-size: 1.25rem;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  resize: vertical;
}

/* ===== Competition Page ===== */
.competition-container {
  padding: 2rem;
}

.competition-select {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.competition-card {
  padding: 2rem;
  background-color: var(--bg-secondary);
  border-radius: 12px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  border: 2px solid transparent;
}

.competition-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--shadow-color);
}

.competition-card.selected {
  border-color: var(--accent-color);
}

.competition-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.competition-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.competition-info {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
  font-size: 0.85rem;
}

.competition-info span {
  padding: 0.25rem 0.5rem;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
}

.phase-indicator {
  text-align: center;
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 1rem;
  padding: 1rem;
  background-color: var(--accent-color);
  color: white;
  border-radius: 8px;
}

.phase-indicator.recall {
  background-color: var(--warning-color);
}

/* ===== History Page ===== */
.history-container {
  padding: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border-radius: 12px;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
  color: var(--accent-color);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.history-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
}

.history-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  overflow: hidden;
}

.history-table th,
.history-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.history-table th {
  background-color: var(--bg-tertiary);
  font-weight: 600;
}

.history-table tr:hover {
  background-color: var(--bg-tertiary);
}

.chart-container {
  background-color: var(--bg-secondary);
  padding: 1.5rem;
  border-radius: 12px;
  margin-bottom: 2rem;
}

.chart-canvas {
  width: 100%;
  height: 300px;
}

/* ===== Settings Page ===== */
.settings-container {
  padding: 2rem;
}

.settings-section {
  margin-bottom: 2rem;
}

.settings-section h2 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-color);
}

.toggle-switch {
  position: relative;
  width: 50px;
  height: 26px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-tertiary);
  transition: 0.3s;
  border-radius: 26px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
}

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

input:checked + .toggle-slider:before {
  transform: translateX(24px);
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  margin-bottom: 0.5rem;
}

.setting-row-label {
  font-weight: 500;
}

/* PAO Editor Table */
.pao-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.pao-table th,
.pao-table td {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  text-align: left;
}

.pao-table th {
  background-color: var(--bg-tertiary);
  position: sticky;
  top: 0;
}

.pao-table input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.pao-table-container {
  max-height: 500px;
  overflow-y: auto;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

/* Memory Palace Editor */
.palace-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.palace-item {
  background-color: var(--bg-secondary);
  border-radius: 8px;
  padding: 1rem;
}

.palace-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.palace-name {
  font-size: 1.1rem;
  font-weight: 600;
}

.location-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.location-item {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  padding: 0.5rem;
  background-color: var(--bg-primary);
  border-radius: 4px;
}

.location-item .order {
  width: 30px;
  text-align: center;
  font-weight: bold;
  color: var(--accent-color);
}

.location-item input {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--bg-primary);
  border-radius: 16px;
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform 0.3s;
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 0.5rem;
}

.modal-body {
  margin-bottom: 1.5rem;
}

.modal-footer {
  display: flex;
  gap: 1rem;
  justify-content: flex-end;
}

/* ===== Result Screen ===== */
.result-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 2rem;
  text-align: center;
}

.result-title {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
  width: 100%;
  max-width: 600px;
}

.result-stat {
  padding: 1.5rem;
  background-color: var(--bg-secondary);
  border-radius: 12px;
}

.result-stat-value {
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--accent-color);
}

.result-stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.5rem;
}

.result-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* ===== Loading ===== */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--bg-tertiary);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-text {
  margin-top: 1rem;
  color: var(--text-secondary);
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 1001;
}

.toast {
  padding: 1rem 1.5rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--shadow-color);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideIn 0.3s ease;
}

.toast.success {
  border-left: 4px solid var(--success-color);
}

.toast.error {
  border-left: 4px solid var(--error-color);
}

.toast.warning {
  border-left: 4px solid var(--warning-color);
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* ===== Recall Interface (Card Memory) ===== */
.recall-container {
  padding: 2rem;
}

.recall-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
  justify-content: center;
}

.recall-card-slot {
  width: 60px;
  height: 84px;
  border: 2px dashed var(--border-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 0.2s;
}

.recall-card-slot:hover {
  border-color: var(--accent-color);
}

.recall-card-slot.filled {
  border-style: solid;
  border-color: var(--accent-color);
}

.card-picker {
  display: grid;
  grid-template-columns: repeat(13, 1fr);
  gap: 0.25rem;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
}

.card-picker-item {
  padding: 0.5rem;
  text-align: center;
  cursor: pointer;
  border-radius: 4px;
  font-size: 0.9rem;
  transition: background-color 0.2s;
}

.card-picker-item:hover {
  background-color: var(--bg-tertiary);
}

.card-picker-item.selected {
  background-color: var(--accent-color);
  color: white;
}

.card-picker-item.red {
  color: var(--card-red);
}

.card-picker-item.black {
  color: var(--card-black);
}

/* ===== Keyboard Shortcuts Info ===== */
.shortcuts-info {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.7;
  transition: opacity 0.2s;
}

.shortcuts-info:hover {
  opacity: 1;
}

.shortcuts-info kbd {
  padding: 0.2rem 0.5rem;
  background-color: var(--bg-tertiary);
  border-radius: 4px;
  font-family: monospace;
  margin: 0 0.25rem;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
  .home-title {
    font-size: 1.75rem;
  }

  .menu-grid {
    grid-template-columns: 1fr;
  }

  .menu-item {
    padding: 1.5rem;
  }

  .playing-card {
    width: 100px;
    height: 140px;
  }

  .playing-card .card-suit {
    font-size: 2.5rem;
  }

  .playing-card.large {
    width: 140px;
    height: 196px;
  }

  .playing-card.large .card-suit {
    font-size: 4rem;
  }

  .timer {
    font-size: 2rem;
  }

  .timer.large {
    font-size: 2.5rem;
  }

  .number-grid {
    font-size: 1.2rem;
  }

  .number-row {
    gap: 1rem;
  }

  .controls {
    flex-direction: column;
    width: 100%;
  }

  .controls .btn {
    width: 100%;
  }

  .settings-panel {
    flex-direction: column;
  }

  .history-table {
    font-size: 0.85rem;
  }

  .history-table th,
  .history-table td {
    padding: 0.5rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .result-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .shortcuts-info {
    display: none;
  }

  .card-picker {
    grid-template-columns: repeat(7, 1fr);
  }

  .header-title {
    font-size: 1.2rem;
  }

  .pao-table-container {
    max-height: 400px;
  }

  .modal {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0.5rem;
  }

  .header {
    padding: 0.75rem;
  }

  .card-memory-container,
  .number-memory-container,
  .competition-container,
  .history-container,
  .settings-container {
    padding: 1rem;
  }

  .number-settings {
    flex-direction: column;
  }

  .setting-item {
    width: 100%;
    justify-content: space-between;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .result-stat-value {
    font-size: 2rem;
  }

  .card-picker {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ===== Print Styles ===== */
@media print {
  .header,
  .controls,
  .shortcuts-info,
  .toast-container {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000;
  }

  .btn {
    border: 2px solid currentColor;
  }
}