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

/* palette "mode lecture" sépia, reprise directement du jeu Python d'origine
   (couleurs douces pour les yeux, pas de blanc pur) */
:root {
  --bg: #EADDCD;
  --panel: #DCC7B0;
  --accent: #A66E4E;
  --gold: #C48B5D;
  --text: #3A2E25;
  --muted: #827265;
  --btn-hover: #8B583B;
  --green: #6B845C;
  --green-hover: #546B44;
  --muted-hover: #6A5A4E;
  --font-d: "Playfair Display", Georgia, serif;
  --font-b: "DM Sans", "Courier New", monospace;
  --radius: 8px;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-b);
  line-height: 1.6;
}

.back-link {
  position: fixed;
  z-index: 10;
  top: 20px;
  left: 20px;
  padding: 0.6rem 1rem;
  color: var(--text);
  background: rgba(255, 255, 255, 0.35);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.back-link:hover {
  background: rgba(255, 255, 255, 0.6);
  transform: translateY(-1px);
}

.nim-app {
  display: flex;
  min-height: 100vh;
  min-height: 100dvh;
  align-items: center;
  justify-content: center;
  padding: 6rem 1.5rem 3rem;
}

.screen {
  display: none;
  width: 100%;
  max-width: 720px;
}

.screen.is-active {
  display: block;
}

.panel {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.75rem;
  text-align: center;
}

.title {
  margin-bottom: 0.5rem;
  color: var(--accent);
  font-family: var(--font-d);
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: 0.02em;
}

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

.title.small {
  font-size: 1.6rem;
  text-align: center;
}

.subtitle {
  margin-bottom: 1.5rem;
  color: var(--text);
  font-family: var(--font-d);
  font-style: italic;
  font-size: 1.05rem;
}

.hint {
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.exe-link {
  color: var(--accent);
  text-decoration: underline;
}

.btn {
  padding: 0.9rem 1.5rem;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-b);
  font-size: 0.9rem;
  font-weight: 700;
  transition: background 0.2s ease, transform 0.15s ease;
}

.btn:hover:not(:disabled) {
  background: var(--btn-hover);
  transform: translateY(-1px);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

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

.btn-green {
  background: var(--green);
}

.btn-green:hover:not(:disabled) {
  background: var(--green-hover);
}

.btn-gold {
  background: var(--gold);
}

.btn-gold:hover:not(:disabled) {
  background: #A87343;
}

.btn-muted {
  margin-top: 1.5rem;
  background: var(--muted);
}

.btn-muted:hover:not(:disabled) {
  background: var(--muted-hover);
}

.game-header {
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(58, 46, 37, 0.15);
  text-align: center;
}

.game-info {
  margin-top: 0.35rem;
  color: var(--text);
  font-size: 0.85rem;
}

.turn-block {
  margin-top: 1.5rem;
  text-align: center;
}

.turn-label {
  color: var(--gold);
  font-family: var(--font-d);
  font-style: italic;
  font-size: 1.1rem;
}

.count {
  color: var(--text);
  font-size: 3.4rem;
  font-weight: 800;
  line-height: 1.1;
}

.count-caption {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* la barre de progression + la grille de ronds, ça remplace le canvas
   que je dessinais à la main en Tkinter dans la version Python */
.board {
  margin: 1.5rem 0;
}

.progress-track {
  position: relative;
  height: 26px;
  overflow: hidden;
  background: var(--panel);
  border-radius: 4px;
}

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

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--bg);
  font-size: 0.72rem;
  font-weight: 700;
}

.dots-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 10px;
  margin-top: 1.25rem;
}

.dot {
  aspect-ratio: 1;
  background: var(--panel);
  border-radius: 50%;
  transition: background 0.25s ease, transform 0.25s ease;
}

.dot.is-filled {
  background: var(--accent);
}

.log {
  min-height: 1.6em;
  margin: 0.5rem 0 1rem;
  text-align: center;
  font-size: 0.95rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.actions-label {
  margin-right: 0.25rem;
  font-weight: 700;
}

.btn-take {
  background: var(--accent);
}

.end-panel {
  display: flex;
  justify-content: center;
  margin-top: 1rem;
}

/* sans cette ligne le [hidden] de l'HTML ne suffit pas : ma règle .end-panel
   juste au-dessus force déjà un display, donc il faut le re-forcer à none ici */
.end-panel[hidden] {
  display: none;
}

#actions-row.is-hidden {
  display: none;
}

@media (max-width: 600px) {
  .dots-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .nim-app {
    padding-top: 5rem;
  }
}

/* Focus clavier : un contour visible sur tout ce qu'on atteint avec Tab.
   :focus-visible ne s'affiche pas au clic souris, seulement au clavier. */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}