/* ==========================================================================
   PM Battles — Design System & Shared Styles
   Version: 1.0 | Static MVP
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Colors */
  --color-bg-primary: #1a1a2e;
  --color-bg-surface: #2d2d44;
  --color-bg-card: #16213e;
  --color-bg-hover: #3a3a5c;
  --color-accent: #4361ee;
  --color-accent-hover: #3651d4;
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-warning: #f59e0b;
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.1);
  --color-text-primary: #ffffff;
  --color-text-secondary: #a0a0b8;
  --color-text-muted: #6b6b80;
  --color-border: #3a3a5c;

  /* Typography */
  --font-primary: -apple-system, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
}

/* --------------------------------------------------------------------------
   2. RESET & BASE STYLES
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  min-width: 1280px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }

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

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

ul {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. LAYOUT UTILITIES
   -------------------------------------------------------------------------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

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

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

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.text-center {
  text-align: center;
}

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

.mono {
  font-family: var(--font-mono);
}

/* --------------------------------------------------------------------------
   4. NAVBAR
   -------------------------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  z-index: 100;
}

.navbar-brand {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.navbar-center {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  font-weight: 600;
}

.navbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.navbar-link {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.navbar-link:hover {
  color: var(--color-text-primary);
}

.navbar-link.active {
  color: var(--color-accent);
}

/* Page content offset for fixed navbar */
.page-content {
  padding-top: 80px;
}

/* --------------------------------------------------------------------------
   5. CARDS
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
}

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

.card-interactive:hover {
  transform: translateY(-2px);
  cursor: pointer;
}

.card-header {
  margin-bottom: var(--space-lg);
}

.card-header h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xs);
}

.card-body {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.section-title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* --------------------------------------------------------------------------
   6. BUTTONS
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: 600;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  gap: var(--space-sm);
}

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

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

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

.btn-secondary:hover {
  background: rgba(67, 97, 238, 0.1);
  color: var(--color-accent);
}

.btn-success {
  background: var(--color-success);
  color: var(--color-text-primary);
  border-color: var(--color-success);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: var(--font-size-lg);
}

.btn:disabled,
.btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   7. FORM INPUTS
   -------------------------------------------------------------------------- */
.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast);
  outline: none;
}

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

.form-input:focus {
  border-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   8. KPI DASHBOARD
   -------------------------------------------------------------------------- */
.kpi-dashboard {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.kpi-card {
  background: var(--color-bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
  border: 1px solid var(--color-border);
}

.kpi-icon {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xs);
}

.kpi-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kpi-value {
  font-family: var(--font-mono);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.kpi-sublabel {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.kpi-delta {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.kpi-delta.positive {
  color: var(--color-success);
}

.kpi-delta.negative {
  color: var(--color-danger);
}

/* 3-column variant for lobby page */
.kpi-dashboard-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

/* --------------------------------------------------------------------------
   9. MCQ OPTIONS
   -------------------------------------------------------------------------- */
.option-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.option-item {
  padding: var(--space-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.option-item:hover {
  border-color: var(--color-accent);
  background: var(--color-bg-hover);
}

.option-item.selected {
  border-color: var(--color-accent);
  background: rgba(67, 97, 238, 0.1);
}

.option-item.correct {
  border-color: var(--color-success);
  background: var(--color-success-bg);
  cursor: default;
}

.option-item.wrong {
  border-color: var(--color-danger);
  background: var(--color-danger-bg);
  cursor: default;
}

.option-item.dimmed {
  opacity: 0.5;
  cursor: default;
}

.option-item.dimmed:hover {
  border-color: var(--color-border);
  background: transparent;
}

.option-letter {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.option-item.selected .option-letter {
  background: var(--color-accent);
  color: var(--color-text-primary);
}

.option-item.correct .option-letter {
  background: var(--color-success);
  color: var(--color-text-primary);
}

.option-item.wrong .option-letter {
  background: var(--color-danger);
  color: var(--color-text-primary);
}

.option-text {
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--color-text-secondary);
}

.option-item.selected .option-text,
.option-item.correct .option-text,
.option-item.wrong .option-text {
  color: var(--color-text-primary);
}

/* --------------------------------------------------------------------------
   10. PROGRESS BAR
   -------------------------------------------------------------------------- */
.progress-section {
  margin-top: var(--space-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--color-bg-surface);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 4px;
  transition: width var(--transition-slow);
  width: 0%;
}

.progress-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  white-space: nowrap;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   11. LEADERBOARD
   -------------------------------------------------------------------------- */
.leaderboard {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.leaderboard-header {
  padding: var(--space-lg) var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.leaderboard-row {
  display: grid;
  grid-template-columns: 50px 1fr 100px 80px;
  align-items: center;
  padding: var(--space-md) var(--space-xl);
  border-bottom: 1px solid rgba(58, 58, 92, 0.5);
  transition: background var(--transition-fast);
}

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

.leaderboard-row:hover {
  background: var(--color-bg-hover);
}

.leaderboard-row.highlight {
  background: rgba(67, 97, 238, 0.12);
  border-left: 3px solid var(--color-accent);
}

.leaderboard-rank {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-text-secondary);
}

.leaderboard-row.highlight .leaderboard-rank {
  color: var(--color-accent);
}

.leaderboard-name {
  font-weight: 600;
}

.leaderboard-row.highlight .leaderboard-name {
  color: var(--color-accent);
}

.leaderboard-elo {
  font-family: var(--font-mono);
  color: var(--color-text-secondary);
  font-weight: 600;
}

.leaderboard-winrate {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.leaderboard-separator {
  padding: var(--space-sm) var(--space-xl);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  text-align: center;
  border-bottom: 1px solid rgba(58, 58, 92, 0.5);
}

.leaderboard-you-badge {
  font-size: var(--font-size-xs);
  background: var(--color-accent);
  color: white;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: var(--space-sm);
  font-weight: 600;
}

/* Top 3 rank highlights */
.rank-gold { color: #ffd700; }
.rank-silver { color: #c0c0c0; }
.rank-bronze { color: #cd7f32; }

/* --------------------------------------------------------------------------
   12. BATTLE CARDS (Dashboard)
   -------------------------------------------------------------------------- */
.battle-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
  margin-bottom: var(--space-md);
}

.battle-card:hover:not(.locked) {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.battle-card.locked {
  opacity: 0.5;
  cursor: not-allowed;
}

.battle-card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.battle-card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.battle-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.difficulty-stars {
  color: var(--color-warning);
  font-size: var(--font-size-sm);
  letter-spacing: 2px;
}

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 10px;
  font-size: var(--font-size-xs);
  font-weight: 600;
  background: rgba(67, 97, 238, 0.15);
  color: var(--color-accent);
}

.battle-card-goal {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.battle-card-lock {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* --------------------------------------------------------------------------
   13. PLAYER SUMMARY
   -------------------------------------------------------------------------- */
.player-summary {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  border: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.player-greeting h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xs);
}

.player-greeting p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.player-stats {
  display: flex;
  gap: var(--space-2xl);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: var(--font-size-xl);
  font-weight: 700;
  display: block;
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   14. MATCHUP (Battle Lobby)
   -------------------------------------------------------------------------- */
.matchup {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  padding: var(--space-2xl) 0;
}

.matchup-player {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  text-align: center;
  border: 1px solid var(--color-border);
  min-width: 240px;
}

.matchup-player.you {
  border-color: var(--color-accent);
}

.matchup-player.opponent {
  border-color: var(--color-danger);
}

.matchup-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
}

.matchup-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.matchup-detail {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xs);
}

.matchup-vs {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* --------------------------------------------------------------------------
   15. SKILLS BAR CHART (Results)
   -------------------------------------------------------------------------- */
.skills-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.skill-row {
  display: grid;
  grid-template-columns: 200px 1fr 60px;
  align-items: center;
  gap: var(--space-md);
}

.skill-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.skill-bar {
  height: 24px;
  background: var(--color-bg-surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: var(--radius-sm);
  transition: width 1s ease;
  width: 0%;
}

.skill-value {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-secondary);
  text-align: right;
}

/* --------------------------------------------------------------------------
   16. RESULTS PAGE COMPONENTS
   -------------------------------------------------------------------------- */
.results-banner {
  text-align: center;
  padding: var(--space-2xl);
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-border);
  margin-bottom: var(--space-xl);
}

.results-banner.win {
  border-color: var(--color-success);
}

.results-banner.lose {
  border-color: var(--color-danger);
}

.results-banner-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.results-banner-title {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  margin-bottom: var(--space-sm);
}

.results-banner.win .results-banner-title {
  color: var(--color-success);
}

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

.results-banner-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.results-score-comparison {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
}

.results-score-item {
  text-align: center;
}

.results-score-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.results-score-value {
  font-family: var(--font-mono);
  font-size: var(--font-size-2xl);
  font-weight: 700;
}

/* Turn breakdown */
.turn-breakdown {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.turn-row {
  display: grid;
  grid-template-columns: 80px 1fr 80px 60px;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-surface);
  border-radius: var(--radius-md);
  gap: var(--space-md);
}

.turn-number {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--color-text-secondary);
}

.turn-skill {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.turn-score {
  font-family: var(--font-mono);
  font-weight: 700;
  text-align: right;
}

.turn-status {
  text-align: center;
  font-size: var(--font-size-lg);
}

/* ELO change */
.elo-change {
  text-align: center;
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.elo-change-value {
  font-family: var(--font-mono);
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.elo-change-value.positive {
  color: var(--color-success);
}

.elo-change-value.negative {
  color: var(--color-danger);
}

/* Action buttons */
.action-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
}

/* --------------------------------------------------------------------------
   17. BATTLE ARENA COMPONENTS
   -------------------------------------------------------------------------- */
.battle-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: var(--space-xl);
}

.question-panel {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
}

.question-number {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.question-text {
  font-size: var(--font-size-lg);
  line-height: 1.6;
  margin-bottom: var(--space-xl);
  color: var(--color-text-primary);
}

.question-submit {
  margin-top: var(--space-xl);
  display: flex;
  justify-content: flex-end;
}

.opponent-panel {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
}

.opponent-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-weight: 600;
  color: var(--color-text-secondary);
}

.opponent-thinking {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-lg);
}

.opponent-hidden {
  background: var(--color-bg-surface);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
  border: 1px dashed var(--color-border);
}

.opponent-hidden-icon {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-sm);
}

.opponent-hidden-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Result phase panels */
.result-panel {
  background: var(--color-bg-card);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
}

.result-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.result-header.correct {
  color: var(--color-success);
}

.result-header.wrong {
  color: var(--color-danger);
}

.result-your-move {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  font-weight: 600;
}

.result-your-move.correct {
  background: var(--color-success-bg);
  border-left: 3px solid var(--color-success);
  color: var(--color-success);
}

.result-your-move.wrong {
  background: var(--color-danger-bg);
  border-left: 3px solid var(--color-danger);
  color: var(--color-danger);
}

.result-explanation {
  margin-bottom: var(--space-lg);
}

.result-explanation h4 {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-explanation p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.result-kpi-impact {
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-surface);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.result-kpi-impact h4 {
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
  color: var(--color-text-secondary);
}

.result-kpi-row {
  display: flex;
  justify-content: space-between;
  padding: var(--space-xs) 0;
  font-size: var(--font-size-sm);
}

.result-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-lg) 0;
}

.result-ai-move {
  margin-bottom: var(--space-lg);
}

.result-ai-move h4 {
  font-size: var(--font-size-sm);
  color: var(--color-danger);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.result-ai-move p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.result-skill-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: rgba(67, 97, 238, 0.1);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.result-next {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--space-lg);
}

/* --------------------------------------------------------------------------
   18. CONSTRAINTS LIST (Battle Lobby)
   -------------------------------------------------------------------------- */
.constraints-card {
  border-left: 3px solid var(--color-warning);
}

.constraints-list {
  list-style: none;
}

.constraints-list li {
  padding: var(--space-sm) 0;
  padding-left: var(--space-lg);
  position: relative;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.constraints-list li::before {
  content: "\2022";
  position: absolute;
  left: 0;
  color: var(--color-warning);
  font-weight: bold;
}

/* --------------------------------------------------------------------------
   19. LOGIN PAGE
   -------------------------------------------------------------------------- */
.page-login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--color-bg-primary);
  background-image: radial-gradient(ellipse at 50% 0%, rgba(67, 97, 238, 0.15) 0%, transparent 60%);
}

.login-container {
  text-align: center;
  width: 100%;
  max-width: 420px;
  padding: var(--space-xl);
}

.login-logo {
  font-size: var(--font-size-3xl);
  font-weight: 900;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

.login-logo-icon {
  font-size: 2.5rem;
  display: block;
  margin-bottom: var(--space-sm);
}

.login-tagline {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
  font-style: italic;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.login-signup {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2xl);
}

.login-features {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  margin-bottom: var(--space-2xl);
}

.login-feature-item {
  text-align: center;
  max-width: 140px;
}

.login-feature-icon {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-sm);
}

.login-feature-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.login-feature-desc {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.login-footer {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xl);
}

.login-footer-tagline {
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-xs);
}

/* --------------------------------------------------------------------------
   20. ANIMATIONS
   -------------------------------------------------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  10%, 50%, 90% { transform: translateX(-4px); }
  30%, 70% { transform: translateX(4px); }
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

@keyframes countUp {
  from { opacity: 0.5; }
  to { opacity: 1; }
}

.animate-fade-in {
  animation: fadeIn var(--transition-normal) ease forwards;
}

.animate-slide-up {
  animation: slideUp var(--transition-slow) ease forwards;
}

.animate-shake {
  animation: shake 0.5s ease;
}

.animate-pulse {
  animation: pulse 0.6s ease;
}

/* Staggered animation delays for lists */
.stagger-1 { animation-delay: 0ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 200ms; }
.stagger-4 { animation-delay: 300ms; }
.stagger-5 { animation-delay: 400ms; }

/* --------------------------------------------------------------------------
   21. SECTION SPACING
   -------------------------------------------------------------------------- */
.section {
  margin-bottom: var(--space-xl);
}

.section-lg {
  margin-bottom: var(--space-2xl);
}

/* --------------------------------------------------------------------------
   22. ADDITIONAL STYLES (API-connected app)
   -------------------------------------------------------------------------- */

/* Form error message */
.form-error {
  color: var(--color-danger);
  font-size: var(--font-size-sm);
  min-height: 1.5em;
  margin-bottom: var(--space-sm);
}

/* Disabled option (while submitting) */
.option-item.disabled {
  pointer-events: none;
  opacity: 0.7;
}

/* Filter buttons */
.filter-btn.active {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* Textarea styling */
textarea.form-input {
  resize: vertical;
  min-height: 80px;
  font-family: var(--font-primary);
}

/* Target KPI indicators */
.kpi-card.target-hit {
  border-color: var(--color-success);
}
.kpi-card.target-missed {
  border-color: var(--color-danger);
}

/* Grid 3-column layout for battles browse */
.grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

/* --------------------------------------------------------------------------
   23. HAMBURGER MENU (Mobile Navigation)
   -------------------------------------------------------------------------- */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: var(--space-xs) var(--space-sm);
  line-height: 1;
}

/* --------------------------------------------------------------------------
   24. RESPONSIVE — Tablet (max-width: 768px)
   -------------------------------------------------------------------------- */
@media (max-width: 1280px) {
  .battle-grid {
    grid-template-columns: 1fr;
  }
  .grid-3col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* Remove desktop min-width */
  body {
    min-width: auto;
  }

  /* Navbar: hamburger menu */
  .navbar-toggle {
    display: block;
  }
  .navbar-right {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-md) var(--space-xl);
    gap: 0;
    z-index: 99;
    box-shadow: var(--shadow-lg);
  }
  .navbar-right.open {
    display: flex;
  }
  .navbar-right .navbar-link {
    display: block;
    padding: var(--space-md) 0;
    font-size: var(--font-size-base);
    border-bottom: 1px solid rgba(58, 58, 92, 0.3);
  }
  .navbar-right .navbar-link:last-child {
    border-bottom: none;
  }

  /* Container: reduce padding */
  .container {
    padding: 0 var(--space-md);
  }

  /* Grids: stack to single column or 2-col */
  .grid-2col {
    grid-template-columns: 1fr;
  }
  .grid-3col {
    grid-template-columns: 1fr;
  }
  .grid-4col {
    grid-template-columns: repeat(2, 1fr);
  }

  /* KPI dashboard: 2×2 grid */
  .kpi-dashboard {
    grid-template-columns: repeat(2, 1fr);
  }
  .kpi-dashboard-3col {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Battle grid: stack */
  .battle-grid {
    grid-template-columns: 1fr;
  }

  /* Cards: reduce padding */
  .card {
    padding: var(--space-lg);
  }

  /* Leaderboard: hide win-rate column */
  .leaderboard-row {
    grid-template-columns: 40px 1fr 80px;
  }
  .leaderboard-winrate {
    display: none;
  }

  /* Player summary: stack vertically */
  .player-summary {
    flex-direction: column;
    text-align: center;
    gap: var(--space-lg);
  }
  .player-stats {
    justify-content: center;
    gap: var(--space-xl);
  }

  /* Matchup: stack vertically */
  .matchup {
    flex-direction: column;
    gap: var(--space-lg);
  }
  .matchup-player {
    min-width: auto;
    width: 100%;
  }
  .matchup-vs {
    font-size: var(--font-size-xl);
  }

  /* Skill rows: reduce label width */
  .skill-row {
    grid-template-columns: 120px 1fr 50px;
    gap: var(--space-sm);
  }
  .skill-label {
    font-size: var(--font-size-xs);
  }

  /* Turn breakdown: simplify */
  .turn-row {
    grid-template-columns: 60px 1fr 60px 40px;
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-sm);
  }

  /* Results score comparison */
  .results-score-comparison {
    gap: var(--space-xl);
  }

  /* Action buttons */
  .action-buttons {
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
  }
  .action-buttons .btn {
    width: 100%;
    max-width: 320px;
  }

  /* Form rows: stack */
  .form-row,
  .form-row-3,
  .form-row-4 {
    grid-template-columns: 1fr;
  }

  /* Login features: wrap */
  .login-features {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  /* Typography scaling */
  h1 { font-size: var(--font-size-2xl); }
  h2 { font-size: var(--font-size-xl); }
  .section-title { font-size: var(--font-size-lg); }

  /* Touch targets */
  .option-item {
    min-height: 48px;
    padding: var(--space-md);
  }
  .btn {
    min-height: 44px;
  }

  /* Admin: battle-row responsive */
  .battle-row {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  .battle-row .row-actions {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  /* Admin: user-row responsive */
  .user-row {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
  .user-row .row-actions {
    justify-content: flex-start;
  }

  /* Stats strip (admin users) */
  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Admin filters */
  .admin-filters {
    flex-direction: column;
    align-items: stretch;
  }
  .admin-header {
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
  }

  /* Admin tabs */
  .admin-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .admin-tab {
    white-space: nowrap;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--font-size-xs);
  }

  /* Pagination */
  .pagination {
    gap: var(--space-md);
  }
}

/* --------------------------------------------------------------------------
   25. RESPONSIVE — Mobile (max-width: 480px)
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  /* Even smaller container padding */
  .container {
    padding: 0 var(--space-sm);
  }

  /* KPI dashboard: single column */
  .kpi-dashboard {
    grid-template-columns: 1fr;
  }
  .kpi-dashboard-3col {
    grid-template-columns: 1fr;
  }
  .grid-4col {
    grid-template-columns: 1fr;
  }

  /* Navbar brand: smaller */
  .navbar-brand {
    font-size: var(--font-size-lg);
  }

  /* Even smaller typography */
  h1 { font-size: var(--font-size-xl); }
  h2 { font-size: var(--font-size-lg); }
  .section-title { font-size: var(--font-size-base); }

  /* KPI values */
  .kpi-value {
    font-size: var(--font-size-xl);
  }

  /* Login container */
  .login-container {
    padding: var(--space-md);
  }
  .login-logo {
    font-size: var(--font-size-2xl);
  }
  .login-tagline {
    font-size: var(--font-size-base);
  }

  /* Login features: single column */
  .login-features {
    flex-direction: column;
    align-items: center;
  }
  .login-feature-item {
    max-width: 200px;
  }

  /* Skill rows: stack completely */
  .skill-row {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }
  .skill-value {
    text-align: left;
  }

  /* Turn rows: simplified */
  .turn-row {
    grid-template-columns: 1fr 50px;
    gap: var(--space-xs);
  }
  .turn-number,
  .turn-skill {
    display: none;
  }

  /* Results banner */
  .results-banner {
    padding: var(--space-lg);
  }
  .results-banner-title {
    font-size: var(--font-size-xl);
  }
  .results-score-comparison {
    flex-direction: column;
    gap: var(--space-md);
  }

  /* Leaderboard: tighter */
  .leaderboard-row {
    grid-template-columns: 30px 1fr 60px;
    padding: var(--space-sm) var(--space-md);
  }

  /* Stats strip: single column */
  .stats-strip {
    grid-template-columns: 1fr;
  }

  /* Page content: less top padding */
  .page-content {
    padding-top: 70px;
  }
}