/* Erin Chess — styles doux et responsive */

:root {
  --color-bg: #f7f3ee;
  --color-surface: #ffffff;
  --color-primary: #6b8f71;
  --color-primary-dark: #557a5a;
  --color-secondary: #e8d5c4;
  --color-accent: #d4a574;
  --color-danger: #c97b7b;
  --color-danger-dark: #a85f5f;
  --color-text: #3d3a36;
  --color-text-muted: #7a756e;
  --color-border: #e0d8cf;
  --color-square-light: #f0e6d8;
  --color-square-dark: #c9b99a;
  --color-highlight: rgba(107, 143, 113, 0.45);
  --color-selected: rgba(212, 165, 116, 0.65);
  --color-check: rgba(201, 123, 123, 0.55);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(61, 58, 54, 0.08);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  touch-action: manipulation;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100dvh;
  padding: var(--safe-top) var(--safe-right) var(--safe-bottom) var(--safe-left);
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

/* Header */

.page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-secondary);
}

.page-header h1 {
  margin: 0;
  font-size: clamp(1.1rem, 4vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary-dark);
}

.page-header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.user-badge {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  background: var(--color-surface);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
}

/* Login */

.app--login {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 1.5rem;
}

.login-page {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 1.75rem;
}

.login-header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.login-icon {
  font-size: 3rem;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.login-header h1 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  color: var(--color-primary-dark);
}

.login-subtitle {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.form-group input {
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color 0.15s;
  -webkit-appearance: none;
  appearance: none;
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.7rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  min-height: 44px;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

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

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

.btn--secondary:hover {
  background: #dcc9b8;
}

.btn--danger {
  background: var(--color-danger);
  color: #fff;
}

.btn--danger:hover {
  background: var(--color-danger-dark);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

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

.btn--small {
  font-size: 0.85rem;
  padding: 0.4rem 0.75rem;
  min-height: 36px;
}

.btn--large {
  font-size: 1.1rem;
  padding: 0.9rem 1.5rem;
}

.btn--full {
  width: 100%;
}

.inline-form {
  display: inline;
  margin: 0;
}

/* Dashboard */

.dashboard {
  display: flex;
  justify-content: center;
  padding: 2rem 0;
}

.welcome-card {
  text-align: center;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem 2rem;
  max-width: 400px;
  width: 100%;
}

.welcome-icon {
  font-size: 3.5rem;
  margin-bottom: 0.75rem;
}

.welcome-card h2 {
  margin: 0 0 0.5rem;
  color: var(--color-primary-dark);
}

.welcome-card p {
  margin: 0 0 1.5rem;
  color: var(--color-text-muted);
}

/* Game layout */

.game-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .game-layout {
    grid-template-columns: 1fr 260px;
    align-items: start;
  }
}

.game-main {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Players bar */

.players-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.player-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.6rem 0.5rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  border: 2px solid var(--color-border);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.player-card--active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(107, 143, 113, 0.2);
}

.player-piece {
  font-size: 1.5rem;
  line-height: 1;
}

.player-name {
  font-weight: 700;
  font-size: 0.9rem;
}

.player-color {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* Status banner */

.status-banner {
  text-align: center;
  padding: 0.6rem 1rem;
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
}

.status-banner--check {
  background: #fdeaea;
  border-color: #f0c0c0;
  color: #8b3a3a;
}

.status-banner--ended {
  background: #eef5ef;
  border-color: #c5dcc8;
  color: var(--color-primary-dark);
}

/* Chessboard */

.board-wrapper {
  display: flex;
  justify-content: center;
  padding: 0.25rem 0;
}

.chessboard {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  width: min(92vw, 480px);
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 3px solid var(--color-border);
  user-select: none;
  -webkit-user-select: none;
}

.square {
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  cursor: default;
  position: relative;
  -webkit-tap-highlight-color: transparent;
}

.square--light {
  background: var(--color-square-light);
}

.square--dark {
  background: var(--color-square-dark);
}

.square--clickable {
  cursor: pointer;
}

.square--selected {
  background: var(--color-selected) !important;
}

.square--highlight {
  background: var(--color-highlight) !important;
}

.square--legal-move::after,
.square--legal-capture::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.square--legal-move::after {
  width: 28%;
  height: 28%;
  background: rgba(107, 143, 113, 0.55);
}

.square--legal-capture::after {
  inset: 10%;
  border: 4px solid rgba(107, 143, 113, 0.55);
  background: transparent;
}

.square--check {
  background: var(--color-check) !important;
}

.square--last-move::after {
  content: '';
  position: absolute;
  inset: 15%;
  border-radius: 50%;
  background: rgba(107, 143, 113, 0.35);
  pointer-events: none;
}

.piece {
  font-size: clamp(1.6rem, 7.5vw, 2.8rem);
  line-height: 1;
  pointer-events: none;
  z-index: 1;
}

.piece--white {
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5), 0 0 1px rgba(0, 0, 0, 0.8);
}

.piece--black {
  color: #2a2622;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* Flipped board (black's perspective) */

.chessboard[data-flip="true"] {
  transform: rotate(180deg);
}

.chessboard[data-flip="true"] .piece {
  transform: rotate(180deg);
}

.chessboard[data-flip="true"] .square--last-move::after,
.chessboard[data-flip="true"] .square--legal-move::after,
.chessboard[data-flip="true"] .square--legal-capture::after {
  transform: rotate(180deg);
}

/* Game actions */

.game-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  padding: 0.5rem 0;
}

/* Sidebar / move history */

.game-sidebar {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  box-shadow: var(--shadow);
  max-height: 480px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

@media (min-width: 768px) {
  .game-sidebar {
    max-height: calc(min(92vw, 480px) + 120px);
  }
}

.sidebar-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--color-primary-dark);
}

.move-history {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.move-history li {
  display: grid;
  grid-template-columns: 2rem 1fr auto;
  gap: 0.35rem;
  align-items: center;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.move-history li:nth-child(odd) {
  background: var(--color-bg);
}

.move-number {
  color: var(--color-text-muted);
  font-weight: 600;
}

.move-san {
  font-weight: 700;
  font-family: 'Courier New', Courier, monospace;
}

.move-player {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.move-history-empty {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-style: italic;
}

/* Modal */

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal[hidden] {
  display: none;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(61, 58, 54, 0.45);
}

.modal__content {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  text-align: center;
  width: 100%;
  max-width: 320px;
  z-index: 1;
}

.modal__content h3 {
  margin: 0 0 1rem;
  color: var(--color-primary-dark);
}

.modal__content--error h3 {
  color: var(--color-danger-dark);
}

.modal__message {
  margin: 0 0 1.25rem;
  color: var(--color-text);
  font-size: 0.95rem;
  line-height: 1.5;
}

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

.modal__actions .btn {
  flex: 1;
  max-width: 140px;
}

.promotion-choices {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.promotion-btn {
  font-size: 2.2rem;
  padding: 0.75rem;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  min-height: 60px;
  -webkit-tap-highlight-color: transparent;
}

.promotion-btn:hover,
.promotion-btn:focus {
  border-color: var(--color-primary);
  background: #eef5ef;
  outline: none;
}

/* Disabled state during loading */

.chessboard--loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Toast */

.toast-container {
  position: fixed;
  left: 50%;
  bottom: calc(1.25rem + var(--safe-bottom));
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  width: min(92vw, 360px);
  pointer-events: none;
}

.toast {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.toast--visible {
  opacity: 1;
  transform: translateY(0);
}

.toast--success {
  background: var(--color-primary);
  color: #fff;
}

.toast--warning {
  background: #e8c98a;
  color: var(--color-text);
}

.toast--error {
  background: var(--color-danger);
  color: #fff;
}

/* Landscape phones */

@media (max-height: 500px) and (orientation: landscape) {
  .page-header {
    margin-bottom: 0.5rem;
  }

  .chessboard {
    width: min(55vh, 380px);
  }

  .game-sidebar {
    max-height: 200px;
  }
}

/* Stats */

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

.stats-mini {
  padding: 0.6rem 0.5rem;
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
}

.stats-mini--me {
  background: rgba(107, 143, 113, 0.12);
  border: 1px solid rgba(107, 143, 113, 0.25);
}

.stats-mini__name {
  margin: 0 0 0.35rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.stats-mini__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.stats-mini__item strong {
  color: var(--color-text);
  font-size: 0.95rem;
}

.stats-mini__mate {
  margin: 0.35rem 0 0;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.admin-page {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.admin-section {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.admin-section h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--color-primary-dark);
}

.admin-meta,
.admin-empty {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.admin-section--danger {
  border: 2px solid rgba(201, 123, 123, 0.35);
}

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

@media (min-width: 600px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.stats-card {
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  border: 1px solid var(--color-border);
}

.stats-card__name {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: var(--color-primary-dark);
}

.stats-list {
  margin: 0;
}

.stats-list__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.stats-list__row:last-child {
  border-bottom: none;
}

.stats-list__row dt {
  color: var(--color-text-muted);
}

.stats-list__row dd {
  margin: 0;
  font-weight: 700;
}

.stats-list__row--highlight dd {
  color: var(--color-primary-dark);
}

.stats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.stats-table th,
.stats-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.stats-table th {
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.8rem;
}

.stats-table tbody tr:nth-child(odd) {
  background: var(--color-bg);
}