/* ============================================
   UI STYLES — Tic Tac Toe
   ============================================ */

/* ---- MAIN MENU ---- */
.menu-screen {
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  gap: 32px;
}

.game-title {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.game-title__main {
  font-size: clamp(2.5rem, 7vw, 4rem);
  font-weight: 900;
  letter-spacing: 4px;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--x-color), var(--accent), var(--o-color));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 3s linear infinite;
}

.game-title__sub {
  font-size: clamp(0.8rem, 2vw, 1rem);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 6px;
}

.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  width: 100%;
  max-width: 320px;
}

.menu-buttons .btn {
  width: 100%;
}

/* ---- MODE SELECTION ---- */
.mode-screen {
  justify-content: center;
  min-height: 100vh;
  gap: 32px;
}

.section-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  text-align: center;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
  text-align: center;
}

.mode-cards {
  display: flex;
  gap: 16px;
  width: 100%;
  max-width: 600px;
  justify-content: center;
}

.mode-card {
  flex: 1;
  max-width: 260px;
  background: var(--bg-card);
  border: 2px solid var(--cell-border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.mode-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-glow);
}

.mode-card__icon {
  font-size: 2.5rem;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 50%;
}

.mode-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.mode-card__desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ---- DIFFICULTY SELECTION ---- */
.difficulty-screen {
  justify-content: center;
  min-height: 100vh;
  gap: 32px;
}

.difficulty-options {
  display: flex;
  gap: 16px;
  width: 100%;
  max-width: 600px;
  justify-content: center;
}

.difficulty-card {
  flex: 1;
  max-width: 180px;
  background: var(--bg-card);
  border: 2px solid var(--cell-border);
  border-radius: var(--radius-lg);
  padding: 24px 16px;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
}

.difficulty-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.difficulty-card__icon {
  font-size: 2rem;
}

.difficulty-card__title {
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.difficulty-card__desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ---- GAME SCREEN ---- */
.game-screen {
  justify-content: center;
  min-height: 100vh;
  gap: 12px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 900px;
}

.game-header__title {
  font-size: clamp(1rem, 3vw, 1.4rem);
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
}

.game-header__actions {
  display: flex;
  gap: 8px;
}

/* ---- HOW TO PLAY ---- */
.howto-content {
  max-height: 70vh;
  overflow-y: auto;
  padding-right: 8px;
}

.howto-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.howto-step__number {
  width: 36px;
  height: 36px;
  min-width: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
}

.howto-step__content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.howto-step__content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---- SETTINGS ---- */
.settings-content {
  max-height: 70vh;
  overflow-y: auto;
  padding-right: 8px;
}

.setting-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--cell-border);
}

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

.setting-label {
  font-weight: 600;
  font-size: 0.95rem;
}

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

/* Toggle switch */
.toggle {
  position: relative;
  width: 52px;
  height: 28px;
  cursor: pointer;
}

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

.toggle__track {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--cell-border);
  border-radius: 14px;
  transition: background var(--transition-normal);
}

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

.toggle__thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-normal);
  pointer-events: none;
}

.toggle input:checked ~ .toggle__thumb {
  transform: translateX(24px);
}

/* Theme selector */
.theme-selector {
  display: flex;
  gap: 8px;
}

.theme-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid var(--cell-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-btn:hover {
  transform: scale(1.1);
}

.theme-btn.active {
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}

.theme-btn--1 {
  background: linear-gradient(135deg, #0f0f1a, #e94560);
}
.theme-btn--2 {
  background: linear-gradient(135deg, #0d1117, #58a6ff);
}
.theme-btn--3 {
  background: linear-gradient(135deg, #1a0a2e, #bb86fc);
}

/* Mark style selector */
.mark-style-selector {
  display: flex;
  gap: 8px;
}

.mark-style-btn {
  padding: 6px 14px;
  border-radius: 20px;
  border: 2px solid var(--cell-border);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  font-family: var(--font-main);
}

.mark-style-btn:hover {
  border-color: var(--text-secondary);
}

.mark-style-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* Confirm dialog */
.confirm-dialog {
  text-align: center;
}

.confirm-dialog__message {
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.confirm-dialog__buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* Result overlay */
.result-overlay {
  text-align: center;
}

.result-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.result-text {
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 8px;
}

.result-text--win {
  color: var(--cell-border-win);
}

.result-text--draw {
  color: var(--draw-color);
}

.result-sub {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 24px;
}

.result-score {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin-bottom: 24px;
}

.result-score__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.result-score__label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.result-score__value {
  font-size: 1.5rem;
  font-weight: 700;
}

.result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}