/* ============================================================
   购物车抽屉
   
   结构
   ----
   .cart-scrim     半透明遮罩，点击关闭
   .cart-drawer    右侧滑出的面板，宽 --drawer-w
   
   打开时给 <body> 加 .cart-open，用于锁滚动、显示遮罩。
   ============================================================ */

.cart-scrim {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--scrim);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-med) var(--ease),
              visibility 0s linear var(--t-med);
}

body.cart-open .cart-scrim {
  opacity: 1;
  visibility: visible;
  transition: opacity var(--t-med) var(--ease), visibility 0s;
}

.cart-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 201;
  display: flex;
  flex-direction: column;
  width: var(--drawer-w);
  max-width: 100vw;
  height: 100dvh;
  background: var(--bg);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform var(--t-slow) var(--ease-out);
}

body.cart-open .cart-drawer {
  transform: translateX(0);
}

/* ---- 头部 ---- */
.cart-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  flex: 0 0 auto;
}

.cart-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 15px;
  font-weight: 650;
}

.cart-title-count {
  font-size: 13px;
  font-weight: 400;
  color: var(--fg-muted);
}

.cart-close {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--fg-muted);
  transition: background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}

.cart-close:hover {
  background: var(--bg-hover);
  color: var(--fg);
}

/* ---- 列表区 ---- */
.cart-body {
  flex: 1 1 auto;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 8px 12px;
}

.cart-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 100%;
  min-height: 220px;
  color: var(--fg-muted);
  font-size: 14px;
  text-align: center;
  padding: 20px;
}

.cart-empty-icon {
  font-size: 30px;
  opacity: 0.4;
}

/* ---- 单项 ---- */
.cart-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 12px;
  border-radius: var(--radius-md);
  transition: background var(--t-fast) var(--ease);
  animation: cart-item-in var(--t-med) var(--ease-out);
}

@keyframes cart-item-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.cart-item:hover {
  background: var(--bg-elevated);
}

.cart-item-main {
  flex: 1 1 auto;
  min-width: 0;
}

.cart-item-domain {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 550;
  word-break: break-all;
  line-height: 1.45;
}

.cart-item-sub {
  font-size: 12.5px;
  color: var(--fg-muted);
  margin-top: 2px;
}

.cart-item-years {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 6px;
}

.cart-years-btn {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 13px;
  line-height: 1;
  transition: border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}

.cart-years-btn:hover:not(:disabled) {
  border-color: var(--border-strong);
  color: var(--fg);
}

.cart-years-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.cart-years-num {
  min-width: 44px;
  text-align: center;
  font-size: 12.5px;
  color: var(--fg-muted);
}

.cart-item-remove {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  color: var(--fg-dim);
  transition: background var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}

.cart-item-remove:hover {
  background: var(--danger-soft);
  color: var(--danger);
}

/* ---- 底部结算区 ---- */
.cart-foot {
  flex: 0 0 auto;
  padding: 16px 20px calc(16px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.cart-summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--fg-muted);
}

.cart-total {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 650;
  color: var(--fg);
  font-variant-numeric: tabular-nums;
}

.cart-note {
  margin-top: 10px;
  font-size: 12px;
  color: var(--fg-dim);
  text-align: center;
  line-height: 1.55;
}

/* ---- 顶部购物车按钮的角标 ---- */
.cart-trigger {
  position: relative;
}

.cart-badge {
  position: absolute;
  top: -3px;
  right: -3px;
  min-width: 17px;
  height: 17px;
  padding: 0 4px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: #1a1206;
  font-size: 10.5px;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.cart-badge[hidden] {
  display: none;
}

/* ---- 移动端：全宽抽屉 ---- */
@media (max-width: 480px) {
  :root {
    --drawer-w: 100vw;
  }
  .cart-drawer {
    border-left: 0;
  }
}