/* ==========================================================================
   ui.css — 统一弹窗/提示体系（全站唯一样式源）
   与 ui.js 配套；主题色跟随 theme.css 的 CSS 变量，日夜模式自动适配。
   ========================================================================== */

:root {
  --ui-radius: 16px;
  --ui-shadow: 0 24px 64px rgba(16, 24, 40, .22), 0 2px 8px rgba(16, 24, 40, .08);
  --ui-bg: #fff;
  --ui-fg: #101828;
  --ui-muted: #667085;
  --ui-line: #eaecf0;
  --ui-primary: var(--primary, #b42318);
  --ui-danger: #d92d20;
  --ui-ok: #067647;
  --ui-mask: rgba(16, 24, 40, .45);
}
html.ui-locked, html.ui-locked body { overflow: hidden; }

.ui-layer { position: relative; z-index: 1200; }

/* 遮罩 + 定位 */
.ui-mask {
  position: fixed; inset: 0; z-index: 1200;
  display: flex; align-items: center; justify-content: center;
  padding: 20px; background: var(--ui-mask);
  backdrop-filter: blur(2px);
  animation: ui-fade .18s ease-out;
}
.ui-mask.ui-out { animation: ui-fade .16s ease-in reverse forwards; }

/* 弹窗卡片 */
.ui-dialog {
  position: relative; width: 100%; max-width: 440px; max-height: 88vh;
  display: flex; flex-direction: column;
  background: var(--ui-bg); color: var(--ui-fg);
  border-radius: var(--ui-radius); box-shadow: var(--ui-shadow);
  transform: translateY(8px) scale(.98); opacity: 0;
  transition: transform .2s cubic-bezier(.16, 1, .3, 1), opacity .18s;
  overflow: hidden;
}
.ui-dialog.ui-in { transform: none; opacity: 1; }
.ui-mask.ui-lg .ui-dialog { max-width: 720px; }
.ui-mask.ui-sm .ui-dialog { max-width: 360px; }

.ui-head { padding: 22px 24px 0; display: flex; gap: 12px; align-items: flex-start; }
.ui-head h3 { margin: 0; font-size: 17px; line-height: 1.4; font-weight: 700; letter-spacing: .2px; }
.ui-icon {
  width: 36px; height: 36px; flex: 0 0 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 17px; font-weight: 700; color: #fff; background: var(--ui-primary);
}
.ui-tone-danger .ui-icon { background: var(--ui-danger); }
.ui-tone-warn .ui-icon { background: #dc6803; }
.ui-tone-success .ui-icon { background: var(--ui-ok); }

.ui-body { flex: 1 1 auto; min-height: 0; padding: 12px 24px 4px; font-size: 14px; line-height: 1.75; color: var(--ui-muted); overflow: auto; }
.ui-body p { margin: 0 0 8px; }
.ui-body p:last-child { margin-bottom: 0; }
.ui-body strong { color: var(--ui-fg); }

.ui-foot { padding: 18px 24px 22px; display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }

/* 按钮 */
.ui-btn {
  appearance: none; border: 1px solid var(--ui-line); background: #fff; color: var(--ui-fg);
  height: 40px; padding: 0 18px; border-radius: 10px; font-size: 14px; font-weight: 600;
  cursor: pointer; transition: background .15s, border-color .15s, transform .1s;
}
.ui-btn:hover { background: #f9fafb; }
.ui-btn:active { transform: translateY(1px); }
.ui-btn.ui-pri { background: var(--ui-primary); border-color: var(--ui-primary); color: #fff; }
.ui-btn.ui-pri:hover { filter: brightness(1.06); }
.ui-btn.ui-danger { background: var(--ui-danger); border-color: var(--ui-danger); color: #fff; }
.ui-btn.ui-ghost { background: transparent; border-color: transparent; color: var(--ui-muted); }
.ui-btn.ui-ghost:hover { background: #f2f4f7; }
.ui-btn:focus-visible { outline: 2px solid var(--ui-primary); outline-offset: 2px; }

/* 关闭按钮 */
.ui-x {
  position: absolute; right: 10px; top: 10px; width: 32px; height: 32px;
  border: 0; border-radius: 8px; background: transparent; color: var(--ui-muted);
  font-size: 22px; line-height: 1; cursor: pointer;
}
.ui-x:hover { background: #f2f4f7; color: var(--ui-fg); }

/* 表单字段 */
.ui-field { display: block; margin: 4px 0 6px; }
.ui-field > span { display: block; font-size: 13px; color: var(--ui-fg); margin-bottom: 6px; font-weight: 600; }
.ui-input {
  width: 100%; height: 42px; padding: 0 12px; font-size: 14px; color: var(--ui-fg);
  border: 1px solid #d0d5dd; border-radius: 10px; background: #fff;
}
.ui-input:focus { outline: 0; border-color: var(--ui-primary); box-shadow: 0 0 0 3px rgba(180, 35, 24, .12); }

/* 轻提示 */
.ui-toast {
  position: fixed; left: 50%; top: 24px; transform: translateX(-50%);
  z-index: 1300; max-width: min(88vw, 520px);
  padding: 12px 18px; border-radius: 12px;
  background: rgba(16, 24, 40, .94); color: #fff; font-size: 14px; line-height: 1.5;
  box-shadow: 0 12px 32px rgba(16, 24, 40, .28);
  animation: ui-toast-in .22s cubic-bezier(.16, 1, .3, 1);
}
.ui-toast.ui-t-ok { background: var(--ui-ok); }
.ui-toast.ui-t-bad { background: var(--ui-danger); }
.ui-toast.ui-out { animation: ui-toast-out .2s forwards; }

/* 移动端：底部抽屉 */
@media (max-width: 640px) {
  .ui-mask { align-items: flex-end; padding: 0; }
  .ui-dialog, .ui-mask.ui-lg .ui-dialog, .ui-mask.ui-sm .ui-dialog {
    max-width: none; max-height: 92vh;
    border-radius: 18px 18px 0 0;
    transform: translateY(100%);
  }
  .ui-dialog.ui-in, .ui-mask .ui-dialog.ui-in { transform: none; }
  .ui-foot { padding-bottom: max(22px, env(safe-area-inset-bottom)); }
  .ui-foot .ui-btn { flex: 1; }
  .ui-toast { top: auto; bottom: 24px; }
}
.ui-mask.ui-sheet { align-items: flex-end; padding: 0; }
.ui-mask.ui-sheet .ui-dialog { max-width: none; border-radius: 18px 18px 0 0; }

@keyframes ui-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes ui-toast-in { from { opacity: 0; transform: translate(-50%, -10px); } to { opacity: 1; transform: translate(-50%, 0); } }
@keyframes ui-toast-out { to { opacity: 0; transform: translate(-50%, -8px); } }

@media (prefers-reduced-motion: reduce) {
  .ui-mask, .ui-dialog, .ui-toast { animation: none !important; transition: none !important; }
}

/* 夜间模式（theme.css 若用 data-theme=dark 切换） */
[data-theme="dark"] {
  --ui-bg: #171a21; --ui-fg: #f2f4f7; --ui-muted: #98a2b3; --ui-line: #2a2f3a;
  --ui-mask: rgba(3, 7, 18, .66);
}
[data-theme="dark"] .ui-btn { background: #1d2129; border-color: #2a2f3a; color: #f2f4f7; }
[data-theme="dark"] .ui-btn.ui-ghost { background: transparent; }
[data-theme="dark"] .ui-btn:hover { background: #232833; }
[data-theme="dark"] .ui-input { background: #12151b; border-color: #2a2f3a; color: #f2f4f7; }
[data-theme="dark"] .ui-x:hover { background: #232833; }

/* 下单弹窗（含收货地址表单）：默认 440px 略窄，给到 520px 才放得下省/市/区三列 */
.ui-mask.ui-md .ui-dialog { max-width: 520px; }
.ui-mask.ui-md .ui-dialog .ui-body { max-height: 62vh; overflow-y: auto; }