.battle-screen {
  max-width: 560px;
}

.battle-title {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 8px;
}

.battle-subtitle {
  color: rgba(255, 255, 255, 0.45);
  font-size: 1rem;
  text-align: center;
  margin-bottom: 48px;
}

.battle-options {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.battle-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 200px;
  height: 240px;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.25s ease;
}

.battle-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.battle-btn-icon {
  font-size: 4.2rem;
  line-height: 1;
  margin-bottom: 16px;
}

.battle-btn-label {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
}

.battle-btn-desc {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  font-weight: 500;
  margin-top: 6px;
}

.battle-popup-rules {
  text-align: left;
  margin-bottom: 28px;
}

.battle-popup-rules p {
  color: rgba(255, 255, 255, 0.8);
  padding: 8px 0;
  line-height: 1.6;
  font-size: 0.95rem;
}

.battle-popup-rules .rule-highlight {
  color: #ffd54f;
  font-weight: 600;
}

.btn-info-mode {
  display: block;
  margin: 0 auto 32px;
  padding: 10px 28px;
  background: #fff;
  color: #000;
  border: none;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-info-mode:hover {
  background: #e0e0e0;
  transform: translateY(-2px);
}

.btn-info-mode .info-icon {
  vertical-align: middle;
  margin-right: 6px;
}

.create-room-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  text-align: left;
}

.create-room-form .setup-error,
.join-room-form .setup-error {
  min-height: 0;
}

.create-room-form .setup-input,
.join-room-form .setup-input {
  padding: 8px 12px;
  font-size: 0.95rem;
}

.mode-picker {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 4px;
}

.mode-picker-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100px;
  height: 90px;
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.mode-picker-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-4px);
}

.mode-picker-btn.active {
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.mode-picker-num {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 4px;
}

.mode-picker-desc {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
  font-weight: 500;
}

.mode-picker-btn.active .mode-picker-desc {
  color: rgba(255, 255, 255, 0.8);
}

.btn-cancel {
  width: 100%;
  padding: 10px 20px;
  border: none;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  background: linear-gradient(135deg, #e53935, #b71c1c);
  color: #fff;
  box-shadow: 0 4px 15px rgba(183, 28, 28, 0.4);
}

.btn-cancel:hover {
  box-shadow: 0 6px 25px rgba(183, 28, 28, 0.6);
  transform: translateY(-2px);
}

.btn-cancel:active {
  transform: scale(0.96);
}

.btn-join {
  width: 100%;
  padding: 10px 20px;
  border: none;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  background: #fff;
  color: #000;
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.15);
}

.btn-join:hover {
  background: #e0e0e0;
  transform: translateY(-2px);
}

.btn-join:active {
  transform: scale(0.96);
}

.create-room-form .btn-start {
  padding: 10px 20px;
  font-size: 0.9rem;
}

.room-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0;
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.85rem;
  font-weight: 500;
}

.room-divider::before,
.room-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
}

.join-room-form {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.join-room-form .setup-input {
  text-align: center;
  font-size: 1.3rem;
  letter-spacing: 8px;
  font-family: 'Courier New', 'Consolas', monospace;
  padding: 8px 12px;
}

.overlay-content-wide {
  max-width: 520px;
}

.room-list-container {
  max-height: 360px;
  overflow-y: auto;
  margin: 16px 0 8px;
  text-align: left;
}

.room-list-loading,
.room-list-empty {
  text-align: center;
  color: rgba(255, 255, 255, 0.4);
  padding: 24px 0;
  font-size: 0.95rem;
}

.room-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.room-list-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
}

.room-list-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.room-list-id {
  font-family: 'Courier New', 'Consolas', monospace;
  font-weight: 800;
  color: #ffd54f;
  font-size: 1rem;
}

.room-list-name {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 600;
  font-size: 0.9rem;
}

.room-list-right {
  flex-shrink: 0;
}

.room-list-players {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.room-list-player-icon {
  color: #fff;
}

@media (max-width: 500px) {
  .battle-btn {
    width: 150px;
    height: 180px;
  }

  .battle-btn-icon {
    font-size: 3rem;
  }

  .battle-btn-label {
    font-size: 1.1rem;
  }

  .battle-title {
    font-size: 1.6rem;
  }

  .battle-options {
    gap: 16px;
  }
}