/* ============================================
   Tomodachi Design System
   Apple-like Premium Minimalism
   ============================================ */

/* ----- CSS Variables ----- */
:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.08);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.12);
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
}

/* Light Theme (Default) */
[data-theme="light"] {
  --bg-base: #F5F5F7;
  --bg-surface: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --bg-hover: rgba(0,0,0,0.03);
  --bg-active: rgba(0,0,0,0.06);
  
  --text-primary: #1D1D1F;
  --text-secondary: #86868B;
  --text-tertiary: #A1A1A6;
  --text-inverse: #FFFFFF;
  
  --accent: #0071E3;
  --accent-hover: #0051A2;
  --accent-light: rgba(0,113,227,0.1);
  
  --border: rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.16);
  
  --success: #34C759;
  --danger: #FF3B30;
  --warning: #FF9500;
  
  --nav-bg: rgba(255,255,255,0.72);
  --nav-blur: blur(20px) saturate(180%);
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-base: #000000;
  --bg-surface: #1C1C1E;
  --bg-elevated: #2C2C2E;
  --bg-hover: rgba(255,255,255,0.05);
  --bg-active: rgba(255,255,255,0.1);
  
  --text-primary: #FFFFFF;
  --text-secondary: #8E8E93;
  --text-tertiary: #636366;
  --text-inverse: #1D1D1F;
  
  --accent: #0A84FF;
  --accent-hover: #409CFF;
  --accent-light: rgba(10,132,255,0.15);
  
  --border: rgba(255,255,255,0.1);
  --border-strong: rgba(255,255,255,0.2);
  
  --success: #30D158;
  --danger: #FF453A;
  --warning: #FF9F0A;
  
  --nav-bg: rgba(28,28,30,0.72);
  --nav-blur: blur(20px) saturate(180%);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition-base), color var(--transition-base);
}

/* ----- Loading Overlay ----- */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

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

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  margin-top: var(--space-4);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
}

/* ----- Screens ----- */
.screen {
  display: none;
  animation: fadeIn 0.4s ease;
}

.screen.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.app.hidden {
  display: none;
}

/* ----- Auth Screen ----- */
.auth-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-surface) 100%);
}

.brand {
  text-align: center;
  margin-bottom: var(--space-8);
}

.brand-icon {
  font-size: 4rem;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.brand-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
}

.card-elevated {
  box-shadow: var(--shadow-xl);
}

.auth-tabs {
  display: flex;
  gap: var(--space-1);
  margin-bottom: var(--space-6);
  background: var(--bg-base);
  border-radius: var(--radius-md);
  padding: 4px;
}

.auth-tab {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.auth-tab.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.auth-form {
  display: none;
  flex-direction: column;
  gap: var(--space-4);
}

.auth-form.active {
  display: flex;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.input-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.input-group .hint {
  font-weight: 400;
  text-transform: none;
  color: var(--text-tertiary);
}

.input-group input {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,113,227,0.3);
}

.btn-primary:active {
  transform: scale(0.98);
}

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

.btn-secondary:hover {
  background: var(--bg-active);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: 0.8125rem;
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 1.0625rem;
}

.btn-full {
  width: 100%;
}

.back-btn {
  margin-bottom: var(--space-4);
  padding-left: 0;
}

/* ----- Forms ----- */
.form-error {
  color: var(--danger);
  font-size: 0.8125rem;
  font-weight: 500;
  min-height: 1.25rem;
}

.form-error:not(:empty) {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.25);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.form-note {
  color: var(--text-tertiary);
  font-size: 0.75rem;
  text-align: center;
  margin-top: var(--space-2);
}

/* ----- Navigation ----- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  background: var(--nav-bg);
  backdrop-filter: var(--nav-blur);
  -webkit-backdrop-filter: var(--nav-blur);
  border-bottom: 1px solid var(--border);
}

.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-primary);
}

.nav-icon {
  font-size: 1.25rem;
}

.nav-btn {
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.nav-btn:hover {
  background: var(--bg-hover);
}

.nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
  font-weight: 600;
}

.presence-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-tertiary);
  transition: background var(--transition-base);
}

.presence-dot.online {
  background: var(--success);
  box-shadow: 0 0 0 3px rgba(52,199,89,0.2);
}

.presence-dot.in-game {
  background: var(--warning);
  box-shadow: 0 0 0 3px rgba(255,149,0,0.2);
}

/* ----- Container ----- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-6);
}

.page-header {
  margin-bottom: var(--space-8);
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-1);
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ----- Cards ----- */
.card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

/* ----- Dashboard Grid ----- */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
}

/* Profile Card */
.profile-card {
  grid-column: 1 / -1;
}

.profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  box-shadow: var(--shadow-md);
}

.profile-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

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

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

.stat-box {
  text-align: center;
  padding: var(--space-4);
  background: var(--bg-base);
  border-radius: var(--radius-md);
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* Friend Card */
.friend-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.friend-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.friend-name {
  font-weight: 600;
  font-size: 1.0625rem;
}

.friend-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-tertiary);
  transition: background var(--transition-base);
}

.status-dot.online {
  background: var(--success);
}

.status-dot.in-game {
  background: var(--warning);
}

.friend-actions {
  margin-top: var(--space-4);
}

/* Game Modes */
.modes-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mode-btn {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  width: 100%;
  font-family: inherit;
  color: inherit;
}

.mode-btn:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: translateX(4px);
}

.mode-emoji {
  font-size: 1.75rem;
  width: 40px;
  text-align: center;
}

.mode-details {
  flex: 1;
}

.mode-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

.mode-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.mode-arrow {
  color: var(--text-tertiary);
  font-size: 1.25rem;
  transition: transform var(--transition-fast);
}

.mode-btn:hover .mode-arrow {
  transform: translateX(4px);
  color: var(--accent);
}

/* Leaderboard & History */
.empty-state {
  color: var(--text-tertiary);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--space-8) 0;
}

.lb-preview {
  margin-bottom: var(--space-4);
}

.history-list {
  max-height: 200px;
  overflow-y: auto;
}

/* ----- Character Select ----- */
.select-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

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

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.panel-header h3 {
  font-size: 1.0625rem;
  font-weight: 600;
}

.sets-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-height: 400px;
  overflow-y: auto;
}

.set-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
}

.set-item:hover {
  background: var(--bg-hover);
}

.set-item.selected {
  border-color: var(--accent);
  background: var(--accent-light);
}

.set-checkbox {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.set-item.selected .set-checkbox {
  background: var(--accent);
  border-color: var(--accent);
}

.set-checkbox::after {
  content: '✓';
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.set-item.selected .set-checkbox::after {
  opacity: 1;
}

.set-info {
  flex: 1;
}

.set-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.set-chars {
  font-family: var(--font-jp);
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.set-count {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  font-weight: 600;
  background: var(--bg-base);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* Custom Grid */
.custom-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-2);
  max-height: 400px;
  overflow-y: auto;
}

.char-tile {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-base);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 2px solid transparent;
  user-select: none;
}

.char-tile:hover {
  background: var(--bg-hover);
  transform: translateY(-2px);
}

.char-tile.selected {
  border-color: var(--accent);
  background: var(--accent-light);
}

.char-tile .jp {
  font-family: var(--font-jp);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.char-tile .romaji {
  font-size: 0.625rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-top: 4px;
}

/* Select Footer */
.select-footer {
  position: sticky;
  bottom: 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: var(--space-5) var(--space-6);
  margin: 0 calc(-1 * var(--space-6));
  display: flex;
  justify-content: space-between;
  align-items: center;
  backdrop-filter: blur(12px);
}

.selection-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.selection-count {
  font-weight: 600;
  font-size: 1.0625rem;
}

.selection-difficulty {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ----- Settings ----- */
.settings-card {
  max-width: 600px;
}

.settings-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--border);
}

.settings-section-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.settings-fields {
  display: grid;
  gap: var(--space-4);
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-5) 0;
  border-bottom: 1px solid var(--border);
}

.setting-row:last-child {
  border-bottom: none;
}

.setting-name {
  font-weight: 600;
  font-size: 1rem;
}

.setting-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

/* Toggle Switch */
.toggle {
  position: relative;
  display: inline-block;
  width: 52px;
  height: 32px;
  cursor: pointer;
}

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

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border-strong);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 28px;
  width: 28px;
  left: 2px;
  bottom: 2px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-spring);
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

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

.toggle input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* ----- Game Placeholder ----- */
.game-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.game-placeholder {
  text-align: center;
  padding: var(--space-12);
}

.game-placeholder h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

/* ----- Toasts ----- */
.toast-container {
  position: fixed;
  top: var(--space-5);
  right: var(--space-5);
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: toastIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  pointer-events: all;
  max-width: 320px;
}

.toast.leaving {
  animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px) scale(0.9); }
  to { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes toastOut {
  to { opacity: 0; transform: translateX(40px); }
}

/* ----- Scrollbar ----- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
  .select-layout {
    grid-template-columns: 1fr;
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .custom-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .nav-title {
    display: none;
  }
  
  .container {
    padding: var(--space-4);
  }
  
  .select-footer {
    flex-direction: column;
    gap: var(--space-4);
    align-items: stretch;
  }
}

/* ============================================
   PHASE 2 — Games, Leaderboards & Polish
   ============================================ */

/* ----- Disabled buttons (was missing) ----- */
.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* ----- Toast accents ----- */
.toast-success { border-left: 3px solid var(--success); }
.toast-error   { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid var(--warning); }
.toast-info    { border-left: 3px solid var(--accent); }
.toast-icon { font-size: 1rem; }

/* ----- Dashboard: mastery bar ----- */
.mastery-bar-wrap { margin-top: var(--space-5); }

.mastery-bar-head {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.mastery-bar {
  height: 8px;
  background: var(--bg-base);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.mastery-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--success));
  border-radius: var(--radius-full);
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ----- Dashboard: history items ----- */
.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}

.history-item:last-child { border-bottom: none; }

.history-mode { font-weight: 600; font-size: 0.9375rem; }
.history-date { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }
.history-meta { text-align: right; }
.history-score { font-weight: 700; font-size: 0.9375rem; color: var(--accent); }
.history-sub { font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px; }

/* ----- Dashboard: "coming soon" modes ----- */
.mode-btn-soon { opacity: 0.72; }
.mode-btn-soon:hover {
  transform: none;
  border-color: var(--border);
  background: var(--bg-base);
}

.mode-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-tertiary);
  background: var(--bg-hover);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ----- Select screen: mode options ----- */
.select-options {
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.select-options-info {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.option-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.option-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Segmented control */
.segmented {
  display: inline-flex;
  background: var(--bg-base);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 3px;
}

.seg-btn {
  border: none;
  background: transparent;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.seg-btn.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

.seg-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ----- Settings: avatar picker ----- */
.avatar-picker-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.avatar-picker {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.avatar-option {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  background: var(--bg-base);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.avatar-option:hover { transform: translateY(-2px); }

.avatar-option.selected {
  border-color: var(--accent);
  background: var(--accent-light);
}

.settings-foot {
  padding-top: var(--space-5);
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ----- Leaderboard screen ----- */
.lb-brackets {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.lb-tab {
  border: 1px solid var(--border);
  background: var(--bg-surface);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lb-tab:hover { color: var(--text-primary); }

.lb-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.lb-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.lb-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.lb-row-me { background: var(--accent-light); }

.lb-rank {
  font-weight: 700;
  font-size: 0.9375rem;
  width: 36px;
  text-align: center;
  flex-shrink: 0;
}

.lb-avatar { font-size: 1.5rem; flex-shrink: 0; }

.lb-name-block {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.lb-name {
  font-weight: 600;
  font-size: 0.9375rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lb-date { font-size: 0.6875rem; color: var(--text-tertiary); }

.lb-score {
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
  flex-shrink: 0;
}

/* Dashboard leaderboard preview */
.lb-preview { margin-bottom: var(--space-4); }

.lb-preview-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-2);
}

.lb-row-compact { padding: var(--space-2); gap: var(--space-2); }
.lb-row-compact .lb-name { flex: 1; }

/* ============================================
   GAME SCREEN
   ============================================ */

.game-shell {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 61px);
}

/* HUD */
.game-hud {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  font-size: 0.9375rem;
  cursor: pointer;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.game-mode-label { font-weight: 700; font-size: 1rem; }

.game-hud-stats {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.hud-chip {
  font-size: 0.8125rem;
  font-weight: 700;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  padding: 4px var(--space-3);
  border-radius: var(--radius-full);
}

.hud-score { color: var(--accent); }
.hud-good { color: var(--success); }
.hud-bad { color: var(--danger); }
.hud-lives { font-size: 0.9375rem; letter-spacing: 1px; }

/* Timer */
.game-timer {
  height: 8px;
  background: var(--bg-base);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-5);
}

.game-timer-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--success), var(--accent));
  border-radius: var(--radius-full);
}

.game-timer-fill.danger {
  background: linear-gradient(90deg, var(--warning), var(--danger));
}

/* Stage */
.game-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  padding: var(--space-4) 0;
}

.game-streak {
  height: 22px;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--warning);
  opacity: 0;
  transform: translateY(6px);
  transition: all var(--transition-base);
}

.game-streak.show { opacity: 1; transform: translateY(0); }

/* Card */
.game-card {
  position: relative;
  width: 240px;
  height: 240px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.game-card.flip-in { animation: cardIn 0.5s cubic-bezier(0.34, 1.3, 0.64, 1); }

.game-card.correct {
  border-color: var(--success);
  box-shadow: 0 0 0 4px rgba(52,199,89,0.18), var(--shadow-lg);
}

.game-card.wrong {
  border-color: var(--danger);
  box-shadow: 0 0 0 4px rgba(255,59,48,0.18), var(--shadow-lg);
}

@keyframes cardIn {
  from { opacity: 0; transform: rotateX(-80deg) translateY(10px); }
  to   { opacity: 1; transform: rotateX(0) translateY(0); }
}

.game-card-char {
  font-family: var(--font-jp);
  font-size: 7rem;
  font-weight: 500;
  line-height: 1;
  color: var(--text-primary);
}

.speak-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--bg-base);
  font-size: 1.125rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.speak-btn:hover:not(:disabled) {
  background: var(--accent-light);
  transform: scale(1.08);
}

.speak-btn:disabled { opacity: 0.35; cursor: not-allowed; }

/* Feedback */
.game-feedback {
  height: 30px;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(6px);
  transition: all var(--transition-base);
}

.game-feedback.show { opacity: 1; transform: translateY(0); }
.game-feedback.good { color: var(--success); }
.game-feedback.bad { color: var(--danger); }
.fb-mark { font-size: 1.25rem; font-weight: 800; }

/* Input */
.game-input-area { margin-top: var(--space-5); }

.answer-form { display: flex; gap: var(--space-3); }

.answer-input {
  flex: 1;
  min-width: 0;
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1.25rem;
  text-align: center;
  transition: all var(--transition-fast);
}

.answer-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.answer-input.shake { animation: shake 0.4s; }

.answer-submit { padding-left: var(--space-6); padding-right: var(--space-6); }

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-5px); }
  80% { transform: translateX(5px); }
}

.choice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}

.choice-btn {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5) var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.choice-btn:hover:not(:disabled) {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.choice-btn:disabled { cursor: default; }

.choice-key {
  position: absolute;
  top: 6px;
  left: 9px;
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--text-tertiary);
}

.choice-correct {
  border-color: var(--success);
  background: rgba(52,199,89,0.12);
  color: var(--success);
}

.choice-wrong {
  border-color: var(--danger);
  background: rgba(255,59,48,0.12);
  color: var(--danger);
}

.game-shell.hit { animation: hitShake 0.4s; }

@keyframes hitShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-7px); }
  75% { transform: translateX(7px); }
}

/* ============================================
   RESULTS OVERLAY
   ============================================ */

.results-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

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

.results-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-elevated);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  text-align: center;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-spring);
}

.results-overlay.active .results-card {
  transform: scale(1) translateY(0);
}

.results-emoji { font-size: 3.5rem; line-height: 1; }

.results-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: var(--space-2);
}

.results-score-block { margin: var(--space-5) 0; }

.results-score {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.results-score-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-top: var(--space-1);
}

.results-note {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  min-height: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: center;
}

.results-note .muted { color: var(--text-tertiary); font-weight: 500; }

.results-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  margin: var(--space-6) 0;
}

.rstat {
  background: var(--bg-base);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-2);
}

.rstat-value { font-size: 1.25rem; font-weight: 700; }

.rstat-label {
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  margin-top: 2px;
}

.results-actions { display: flex; gap: var(--space-3); }
.results-actions .btn { flex: 1; }

/* Confetti */
.confetti-piece {
  position: fixed;
  top: -24px;
  width: 10px;
  height: 14px;
  border-radius: 2px;
  z-index: 10000;
  pointer-events: none;
  animation-name: confettiFall;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
}

@keyframes confettiFall {
  to { transform: translateY(106vh) rotate(720deg); opacity: 0.85; }
}

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

/* ----- Phase 2 responsive ----- */
@media (max-width: 768px) {
  .game-shell { padding: var(--space-5) var(--space-4); }
  .game-card { width: 200px; height: 200px; }
  .game-card-char { font-size: 5.5rem; }
  .results-card { padding: var(--space-6); }
  .results-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ============================================
   PHASE 2.1 — UX revision
   ============================================ */

/* ----- Nav user chip ----- */
.nav-avatar {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-full);
  background: var(--bg-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.nav-name-text { font-size: 0.875rem; font-weight: 600; }

/* ----- Compact friend bar (replaces the big friend card) ----- */
.friend-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.friend-bar-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
}

.friend-bar-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.friend-bar-text { min-width: 0; }

.friend-bar-name {
  font-weight: 600;
  font-size: 0.9375rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.friend-bar-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 1px;
}

/* ----- Danger button + Danger Zone ----- */
.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  filter: brightness(0.92);
  transform: translateY(-1px);
}

.btn-danger:active:not(:disabled) { transform: scale(0.98); }

.danger-zone {
  border-bottom: none !important;
  padding-bottom: 0 !important;
}

.danger-title { color: var(--danger); }

.danger-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.reset-confirm {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-4);
  background: rgba(255,59,48,0.06);
  border: 1px solid rgba(255,59,48,0.2);
  border-radius: var(--radius-md);
}

.reset-label { font-size: 0.8125rem; color: var(--text-secondary); }

.reset-input {
  padding: var(--space-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  letter-spacing: 0.15em;
  text-align: center;
  text-transform: uppercase;
}

.reset-input:focus {
  outline: none;
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(255,59,48,0.12);
}

.reset-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

/* ----- Pause overlay ----- */
.pause-overlay {
  position: fixed;
  inset: 0;
  z-index: 8500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

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

.pause-card {
  width: 100%;
  max-width: 340px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  text-align: center;
}

.pause-emoji { font-size: 3rem; line-height: 1; }
.pause-title { font-size: 1.5rem; font-weight: 700; margin-top: var(--space-2); }

.pause-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: var(--space-2) 0 var(--space-5);
}

.pause-card .btn { width: 100%; }

/* ----- Listen-practice prompt ----- */
.game-card-char.listen-prompt {
  font-family: var(--font-sans);
  animation: listenPulse 1.6s ease-in-out infinite;
}

@keyframes listenPulse {
  0%, 100% { transform: scale(1); opacity: 0.82; }
  50% { transform: scale(1.12); opacity: 1; }
}

/* Multiple-choice buttons that show Japanese glyphs (Listen practice) */
.choice-jp .choice-text {
  font-family: var(--font-jp);
  font-size: 1.875rem;
  font-weight: 700;
}

/* ----- HUD countdown ----- */
.hud-time { color: var(--text-primary); }

.hud-time.danger {
  color: var(--danger);
  animation: pulseDanger 1s ease-in-out infinite;
}

@keyframes pulseDanger {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ----- Phase 2.1 responsive ----- */
@media (max-width: 768px) {
  .nav-name-text { display: none; }
}

/* ============================================
   PHASE 3 — Duel Mode
   ============================================ */

/* ----- Duel lobby ----- */
.lobby-card {
  max-width: 420px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-10) var(--space-6);
}

.lobby-spinner { width: 48px; height: 48px; }
.lobby-status { font-size: 1.25rem; font-weight: 700; }

/* ----- Duel screen ----- */
.duel-shell {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 61px);
}

.duel-topbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.duel-round-label {
  flex: 1;
  text-align: center;
  font-weight: 700;
  font-size: 1rem;
}

.duel-topbar-spacer { width: 38px; flex-shrink: 0; }

.duel-hud {
  display: flex;
  align-items: stretch;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.duel-player {
  flex: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), background var(--transition-fast);
  min-width: 0;
}

.duel-player-self { border-color: var(--accent); }
.duel-player-opp { flex-direction: row-reverse; text-align: right; }

.duel-player.answered {
  border-color: var(--success);
  background: rgba(52,199,89,0.08);
}

.duel-p-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.duel-p-info { flex: 1; min-width: 0; }

.duel-p-name {
  font-weight: 600;
  font-size: 0.875rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.duel-p-won { font-size: 0.6875rem; color: var(--text-secondary); margin-top: 1px; }

.duel-p-score {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  flex-shrink: 0;
}

.duel-vs-badge {
  align-self: center;
  font-weight: 800;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.duel-timer { margin-bottom: var(--space-5); }

/* ----- Duel overlays (countdown / stall) ----- */
.duel-overlay {
  position: fixed;
  inset: 0;
  z-index: 8800;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  padding: var(--space-5);
  background: rgba(0,0,0,0.62);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

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

.duel-countdown-num {
  font-size: 6rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  animation: cdPulse 1s ease-in-out infinite;
}

.duel-countdown-text { color: rgba(255,255,255,0.82); font-weight: 600; }

@keyframes cdPulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.16); opacity: 1; }
}

/* ----- Duel results ----- */
.duel-result-detail {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-top: var(--space-2);
}

.duel-result-scores {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin: var(--space-6) 0;
}

.dr-side {
  flex: 1;
  background: var(--bg-base);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-2);
  border: 2px solid transparent;
}

.dr-side.dr-win {
  border-color: var(--success);
  background: rgba(52,199,89,0.1);
}

.dr-name {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dr-score { font-size: 1.75rem; font-weight: 800; color: var(--accent); }
.dr-sub { font-size: 0.6875rem; color: var(--text-secondary); }
.dr-vs { font-weight: 800; color: var(--text-tertiary); font-size: 0.8125rem; }

/* ----- Duel invite modal ----- */
.invite-overlay {
  position: fixed;
  inset: 0;
  z-index: 9100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

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

.invite-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  text-align: center;
  animation: invitePop 0.4s cubic-bezier(0.34, 1.4, 0.64, 1);
}

@keyframes invitePop {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}

.invite-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin: 0 auto;
}

.invite-emoji { font-size: 2.25rem; margin-top: var(--space-2); }
.invite-title { font-size: 1.375rem; font-weight: 700; margin-top: var(--space-1); }
.invite-text { color: var(--text-secondary); margin-top: var(--space-1); }

.invite-details {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin: var(--space-3) 0 var(--space-5);
}

.invite-actions { display: flex; gap: var(--space-3); }
.invite-actions .btn { flex: 1; }

/* ----- History result colours ----- */
.history-score.res-win { color: var(--success); }
.history-score.res-loss { color: var(--danger); }

/* ----- Phase 3 responsive ----- */
@media (max-width: 768px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .duel-shell { padding: var(--space-4); }
  .duel-p-avatar { width: 34px; height: 34px; font-size: 1.05rem; }
  .duel-p-score { font-size: 1.25rem; }
  .duel-countdown-num { font-size: 4.5rem; }
}

/* ============================================
   PHASE 4 — Sync Match (Co-op)
   ============================================ */

.coop-shell {
  max-width: 560px;
  margin: 0 auto;
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 61px);
}

.coop-statusbar {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.coop-time.danger {
  color: var(--danger);
  animation: pulseDanger 1s ease-in-out infinite;
}

/* Team pips */
.coop-team {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.coop-pip {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.coop-pip.cleared {
  border-color: var(--success);
  background: rgba(52,199,89,0.12);
}

.coop-pip.missed { border-color: var(--warning); }

.coop-pip-avatar { font-size: 1.1rem; }
.coop-pip-name { font-size: 0.8125rem; font-weight: 600; }
.coop-pip-state { font-size: 0.9375rem; }

.coop-team-link {
  color: var(--text-tertiary);
  font-weight: 700;
  font-size: 1.1rem;
}

/* Leaderboard mode toggle */
.lb-modes {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.lb-mode-tab {
  flex: 1;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lb-mode-tab:hover { color: var(--text-primary); }

.lb-mode-tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Co-op leaderboard rows: stacked team avatars */
.lb-avatars {
  display: flex;
  flex-shrink: 0;
}

.lb-avatars .lb-avatar { margin-left: -8px; }
.lb-avatars .lb-avatar:first-child { margin-left: 0; }

/* ----- Phase 4 responsive ----- */
@media (max-width: 768px) {
  .coop-shell { padding: var(--space-4); }
  .coop-pip { padding: var(--space-2) var(--space-3); }
}