/* ============================================================
   四套皮肤共用的一套「外壳」—— 只有三件东西，四套都吃同一份：

     1) .sq-bar      全局功能栏（此刻 / 换肤 / 昼夜 / 全屏 / 我的）
                     只剩这一条，钉在刊头下面居中；44×44 一格，
                     指针落上去整格长开、标题从右侧滑进来。
                     来源：Uiverse.io Admin12121 的展开菜单。

     2) .sq-nav      页面导航：一排平铺的标签页，不再占左右两栏。
                     选中那一页与纸面同色，两侧用 10px 的圆挖出凹角，
                     整条看上去是从纸里长出来的。
                     来源：Uiverse.io Spacious74 的 radio-inputs
                     （同一份几何：选中页 + 两个凹角 + 单选组）。

     3) .sq-check    做任务时的勾选项
                     方形框 → 勾 → 整格转 360°（含 Y 轴），
                     颜色过渡 1.3s，来自 Uiverse.io KhaledMatalkah
                     的 custom-checkbox。

   颜色一律从页面给的 --q-* 令牌来，这里不写任何一套皮肤的具体色值。
   页面上方留的 --sq-top 由 base.css 给（含系统状态栏安全区）。
   ============================================================ */

.sq-bar,
.sq-nav,
.sq-check,
.sq-scrim,
.sq-sheet {
  --q-bg: var(--paper-2, #eee6d6);
  --q-ink: var(--ink, #292620);
  --q-ink-3: var(--ink-3, #978a72);
  --q-line: var(--line, rgba(41, 38, 32, .15));
  --q-face: var(--paper, #f3ebda);
  --q-track: var(--paper-3, #ded1b6);
  --q-sel-ink: var(--seal, #a33427);
  --q-mark: var(--paper, #f3ebda);
  --q-hover: color-mix(in srgb, var(--q-ink) 8%, transparent);
}

/* ---------- 1. 全局功能栏 ---------- */

.sq-bar {
  position: absolute;
  left: 50%;
  top: calc(var(--sq-top, 24px) + 48px);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 3px 5px 3px 3px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--q-bg) 76%, transparent);
  border: 1px solid color-mix(in srgb, var(--q-ink) 9%, transparent);
  box-shadow: 0 8px 22px color-mix(in srgb, var(--q-ink) 13%, transparent),
              inset 0 1px 0 color-mix(in srgb, #fff 34%, transparent);
  backdrop-filter: blur(14px) saturate(1.1);
  transform: translateX(-50%);
  transition: box-shadow .25s ease, background .3s ease, top .3s ease;
}
.sq-bar:focus-within { box-shadow: 0 12px 30px color-mix(in srgb, var(--q-ink) 20%, transparent); }

/* 把手：44×44。它自己在最左边，收起来只留它一枚。 */
.sq-bar-handle {
  position: relative;
  width: 44px;
  height: 44px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: var(--q-ink);
  background: none;
  border: 0;
  cursor: pointer;
  transition: background .2s ease, transform .2s ease;
}
.sq-bar-handle::after {
  content: "";
  position: absolute;
  right: -2px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--q-line);
  transition: opacity .2s ease;
}
.sq-bar-handle:hover,
.sq-bar-handle:focus-visible { background: var(--q-hover); }
.sq-bar-handle:active { transform: scale(.94); }
.sq-bar-handle svg { width: 21px; height: 21px; display: block; }
.sq-bar-handle .ico-x { display: none; }
.sq-bar[data-open="0"] .ico-x { display: block; }
.sq-bar[data-open="0"] .ico-o { display: none; }
.sq-bar[data-open="0"] .sq-bar-handle::after { opacity: 0; }

.sq-bar-items {
  display: flex;
  align-items: center;
  gap: 1px;
  transition: max-width .28s cubic-bezier(.2, .9, .22, 1), opacity .2s ease;
  max-width: 260px;
  opacity: 1;
  overflow: hidden;
}
.sq-bar[data-open="0"] .sq-bar-items {
  max-width: 0;
  opacity: 0;
  pointer-events: none;
}

.sq-bar-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: none;
  color: inherit;
  cursor: pointer;
  overflow: hidden;
  transform-origin: center right;
  transition: width .2s ease-in, background .2s ease;
}
.sq-bar-item::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  border-radius: 999px;
  background: var(--q-hover);
  transform: translateX(100%);
  transform-origin: center right;
  transition: transform .2s ease-in;
}
.sq-bar-item svg { position: absolute; left: 11px; width: 22px; height: 22px; display: block; }
.sq-bar-item .sq-bar-title {
  display: block;
  width: 100%;
  padding-left: 38px;
  padding-right: 10px;
  text-align: left;
  white-space: nowrap;
  font: 500 12px/1 var(--font-ui);
  letter-spacing: .12em;
  color: var(--q-ink);
  opacity: 0;
  transform: translateX(100%);
  transform-origin: center right;
  transition: transform .2s ease-in, opacity .2s ease-in;
}
.sq-bar[data-open="1"] .sq-bar-item:hover,
.sq-bar[data-open="1"] .sq-bar-item:focus-visible {
  width: 118px;
  outline: 0;
}
.sq-bar[data-open="1"] .sq-bar-item:hover::before,
.sq-bar[data-open="1"] .sq-bar-item:focus-visible::before { transform: translateX(0); }
.sq-bar[data-open="1"] .sq-bar-item:hover .sq-bar-title,
.sq-bar[data-open="1"] .sq-bar-item:focus-visible .sq-bar-title {
  transform: translateX(0);
  opacity: 1;
}
.sq-bar-item[aria-pressed="true"] { color: var(--q-sel-ink); }
.sq-bar-item[aria-pressed="true"] .sq-bar-title { color: var(--q-sel-ink); }
.sq-bar-item .ico-moon { display: none; }
.sq-stage[data-night="1"] .sq-bar-item .ico-sun { display: none; }
.sq-stage[data-night="1"] .sq-bar-item .ico-moon { display: block; }
/* 全屏：四角括号画成「向外」时表示可以铺开，画成「向内」时表示收起 */
.sq-bar-item .ico-compress { display: none; }
.sq-stage[data-nav="off"] .sq-bar-item .ico-expand { display: none; }
.sq-stage[data-nav="off"] .sq-bar-item .ico-compress { display: block; }

/* 触屏没有 hover：把标题先收起来，点按时照样出功能，并给一个按压底色反馈 */
@media (hover: none) {
  .sq-bar[data-open="1"] .sq-bar-item:hover { width: 44px; }
  .sq-bar[data-open="1"] .sq-bar-item:hover::before { transform: translateX(100%); }
  .sq-bar[data-open="1"] .sq-bar-item:hover .sq-bar-title { transform: translateX(100%); opacity: 0; }
  .sq-bar[data-open="1"] .sq-bar-item:active { width: 44px; }
  .sq-bar[data-open="1"] .sq-bar-item:active::before { transform: translateX(0); }
  .sq-bar[data-open="1"] .sq-bar-item:active .sq-bar-title { transform: translateX(100%); opacity: 0; }
}

/* ---------- 2. 导航：整排标签页，选中页与纸面相连 ---------- */

.sq-nav {
  position: absolute;
  left: 14px;
  right: 14px;
  top: calc(var(--sq-top, 24px) + 100px);
  z-index: 9;
  display: flex;
  align-items: flex-end;
  gap: 4px;
  /* 左右各留 14px：第一页/最后一页的凹角方块与它的阴影
     全部落在槽里，不会在整条的圆角外面滋出一块纸色。 */
  padding: 6px 14px 0;
  background: var(--q-track);
  border: 1px solid color-mix(in srgb, var(--q-ink) 9%, transparent);
  border-bottom: 0;
  border-radius: 15px 15px 0 0;
  transition: opacity .3s ease, transform .3s ease, visibility .3s;
}
.sq-nav input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}
.sq-nav .sq-tab {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--q-ink-3);
  border-radius: 11px 11px 0 0;
  font-size: 12px;
  letter-spacing: .22em;
  text-indent: .22em;
  line-height: 1;
  transition: color .18s ease-in-out, background .18s ease-in-out;
  -webkit-tap-highlight-color: transparent;
}
.sq-nav .sq-tab:hover { color: var(--q-ink); }
.sq-nav input:checked + .sq-tab {
  background: var(--q-face);
  color: var(--q-ink);
  font-weight: 600;
}
.sq-nav input:focus-visible + .sq-tab { outline: 2px solid currentColor; outline-offset: -4px; }

/* 凹角：一块「槽色」的方砖，在靠页面的那个角上挖掉一个圆，
   再用同色阴影把方砖外围补成纸色 —— 剩下的就是纸面向上鼓出的曲面。
   这是 Uiverse Spacious74 的原几何，只换成本页令牌。 */
.sq-nav input:checked + .sq-tab::before,
.sq-nav input:checked + .sq-tab::after {
  content: "";
  position: absolute;
  bottom: 0;
  width: 10px;
  height: 10px;
  background: var(--q-track);
  pointer-events: none;
}
.sq-nav input:checked + .sq-tab::before {
  left: -10px;
  border-bottom-right-radius: 300px;
  box-shadow: 4px 4px 0 4px var(--q-face);
}
.sq-nav input:checked + .sq-tab::after {
  right: -10px;
  border-bottom-left-radius: 300px;
  box-shadow: -4px 4px 0 4px var(--q-face);
}

/* 全屏：标签页整条让开，正文接管整块屏幕；功能栏退到右上角一枚。 */
.sq-stage[data-nav="off"] .sq-nav {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-10px);
}
.sq-stage[data-nav="off"] .sq-bar {
  left: auto;
  right: 10px;
  top: var(--sq-top, 26px);
  transform: none;
}

/* ---------- 3. 勾选项 ---------- */

.sq-check {
  position: relative;
  width: 22px;
  height: 22px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--q-ink-3);
  border-radius: 5px;
  background: transparent;
  transform-style: preserve-3d;
  transition: background 1.3s, border-color 1.3s, color 1.3s, transform .3s;
}
.sq-check::before {
  content: "\2713";
  font: 700 13px/1 var(--font-ui);
  color: transparent;
  transition: color 1.3s, transform .3s;
}
[aria-checked="true"] .sq-check,
.sq-check[data-on="1"] {
  background: var(--q-sel-ink);
  border-color: var(--q-sel-ink);
  transform: scale(1.1) rotateZ(360deg) rotateY(360deg);
}
[aria-checked="true"] .sq-check::before,
.sq-check[data-on="1"]::before { color: var(--q-mark); }
[data-step]:hover .sq-check:not([data-on="1"]) {
  border-color: var(--q-ink);
  background: color-mix(in srgb, var(--q-ink) 6%, transparent);
}
[data-step]:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }

/* ---------- 4. 浮层：换肤 / 此刻（从底部长出来，不是 ⋯ 菜单） ---------- */

.sq-scrim {
  position: absolute;
  inset: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--q-ink) 42%, transparent);
  backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity .22s ease;
}
.sq-scrim[data-on="1"] { opacity: 1; }

.sq-sheet {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 61;
  padding: 16px 16px 14px;
  border-radius: 20px;
  background: var(--q-bg);
  color: var(--q-ink);
  border: 1px solid var(--q-line);
  box-shadow: 0 22px 50px color-mix(in srgb, var(--q-ink) 30%, transparent);
  transform: translateY(18px) scale(.985);
  opacity: 0;
  transition: transform .26s cubic-bezier(.2, .9, .22, 1), opacity .2s ease;
}
.sq-sheet[data-on="1"] { transform: none; opacity: 1; }
.sq-sheet-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--q-line);
}
.sq-sheet-head b { font: 500 13px/1 var(--font-serif); letter-spacing: .22em; }
.sq-sheet-head span { font: 400 9px/1 var(--font-ui); letter-spacing: .14em; color: var(--q-ink-3); }
.sq-sheet-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 54px;
  padding: 10px 4px;
  border: 0;
  border-bottom: 1px solid var(--q-line);
  background: none;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: background .18s ease, padding .18s ease;
}
.sq-sheet-row:last-child { border-bottom: 0; }
.sq-sheet-row:hover { background: var(--q-hover); }
.sq-sheet-row:active { transform: scale(.995); }
.sq-sheet-row .n { font: 400 10px/1 var(--font-mono); color: var(--q-ink-3); width: 18px; flex: none; }
.sq-sheet-row .t { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.sq-sheet-row .t b { font: 500 13px/1 var(--font-serif); letter-spacing: .12em; }
.sq-sheet-row .t small { font: 400 9px/1.5 var(--font-ui); letter-spacing: .1em; color: var(--q-ink-3); }
.sq-sheet-row .go { font: 400 10px/1 var(--font-ui); letter-spacing: .12em; color: var(--q-sel-ink); }
.sq-sheet-row[aria-current="true"] { background: color-mix(in srgb, var(--q-track) 60%, transparent); }
.sq-sheet-row[aria-current="true"] .go { color: var(--q-ink-3); }

.sq-chips { display: flex; gap: 8px; padding: 14px 0 4px; }
.sq-chip {
  flex: 1;
  min-height: 46px;
  border: 1px solid var(--q-line);
  border-radius: 12px;
  background: none;
  color: var(--q-ink-3);
  font: 500 12px/1 var(--font-ui);
  letter-spacing: .1em;
  cursor: pointer;
  transition: all .18s ease;
}
.sq-chip[aria-pressed="true"] {
  background: var(--q-sel-ink);
  border-color: var(--q-sel-ink);
  color: var(--q-mark);
}
.sq-sheet-note {
  padding-top: 10px;
  font: 400 9px/1.7 var(--font-ui);
  letter-spacing: .1em;
  color: var(--q-ink-3);
}

/* ---------- 5. 轻提示（四套同一句语气） ---------- */

.sq-toast {
  position: absolute;
  left: 50%;
  bottom: var(--sq-toast-bottom, 96px);
  z-index: 70;
  transform: translate(-50%, 10px);
  padding: 8px 16px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--q-ink) 90%, #000);
  color: var(--q-mark);
  font: 500 10px/1 var(--font-ui);
  letter-spacing: .16em;
  opacity: 0;
  transition: opacity .24s ease, transform .24s ease;
  pointer-events: none;
}
.sq-toast[data-on="1"] { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 6. 滑动返回：一颗跟着手指走的箭头 ---------- */

.sq-swipe-hint {
  position: absolute;
  left: 0;
  top: 50%;
  z-index: 80;
  width: 40px;
  height: 40px;
  margin-top: -20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--q-bg) 90%, transparent);
  border: 1px solid var(--q-line);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--q-ink) 18%, transparent);
  color: var(--q-ink-3);
  font: 500 18px/1 var(--font-ui);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-48px);
  transition: opacity .14s ease;
}
.sq-stage.is-swiping .sq-swipe-hint { opacity: 1; transition: none; }
.sq-stage.is-swiping .sq-swipe-hint[data-armed="1"] {
  color: var(--q-sel-ink);
  border-color: color-mix(in srgb, var(--q-sel-ink) 46%, transparent);
}