/* ========== Header ========== */
.header {
  background-color: var(--bg2, #23130e);
  background-image: url('../img/Background-white.png');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: sticky;
  top: 0;
  z-index: 100;
  height: 52px;
}
.header-logo {
  position: absolute;
  left: 24px;
  top: 50%;
  transform: translateY(-50%);
  height: 36px;
  width: auto;
  object-fit: contain;
  display: block;
  z-index: 1;
}
#gamePhaseBadge {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: inline-block;
  z-index: 1;
}

/* ========== 导航 ========== */
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}
.nav-list li a,
.nav-list li button.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: #ffe5c4;
  text-decoration: none;
  background: #3d221a;
  border: none;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.nav-list li a:hover,
.nav-list li button.nav-btn:hover {
  background: #5a3428;
  color: #fff;
  transform: none;
  filter: none;
}
.nav-list li button.nav-btn.nav-start {
  background: #fff;
  color: #1a1a1a;
  padding: 7px 20px;
  font-weight: 700;
}
.nav-list li button.nav-btn.nav-start:hover {
  background: #f0ebe6;
  color: #1a1a1a;
}
.nav-list li button.nav-btn.nav-start:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}
/* 清理按钮 */
.nav-list li button.nav-btn.nav-cleanup {
  background: rgba(199,46,40,0.15);
  color: var(--accent);
  border: 1px solid rgba(199,46,40,0.3);
  padding: 7px 14px;
  animation: btnAppear .3s ease;
}
.nav-list li button.nav-btn.nav-cleanup:hover {
  background: rgba(199,46,40,0.25);
  color: var(--accent);
  transform: none;
}
@keyframes btnAppear {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}
/* 接管模式按钮 */
.nav-list li button.nav-btn.nav-takeover {
  background: rgba(136,73,56,0.2);
  color: #c77d60;
  border: 1px solid rgba(136,73,56,0.4);
  padding: 7px 14px;
}
.nav-list li button.nav-btn.nav-takeover:hover {
  background: rgba(136,73,56,0.35);
  color: #e09270;
  transform: none;
}
.nav-list li button.nav-btn.nav-takeover.active {
  background: rgba(136,73,56,0.5);
  color: #fff;
  border-color: #c7643a;
}
/* 明暗牌分段选择器 */
.nav-toggle {
  display: inline-flex;
  background: #4b4b4b;
  border-radius: 20px;
  padding: 2px;
  gap: 0;
}
.nav-toggle-btn {
  padding: 5px 12px;
  border: none;
  border-radius: 18px;
  font-size: 12px;
  font-weight: 600;
  color: #ffffff;
  background: transparent;
  cursor: pointer;
  transition: background .2s, color .2s;
}
.nav-toggle-btn.active {
  background: #ffffff;
  color: #3d221a;
}
.nav-toggle-btn:hover:not(.active) {
  color: #ffffff;
}

/* ========== 主布局（三等分）========== */
.main {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  height: calc(100vh - 52px);
  overflow: hidden;
}

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
  .main { grid-template-columns: 1fr 1fr 1fr; }
}
@media (max-width: 800px) {
  .main {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 200px 1fr;
    height: auto;
  }
  .thinking-panel.right { border-left: none; border-top: 1px solid var(--border); }
}