/* ============================================================
   收藏 / 笔记 / 搜索(需求 AU · 模块③,2026-10-18)
   ① 学习页顶部搜索条 .sk-bar
   ② 搜索页 .sk-page / .sk-item
   ③ 课程详情里的收藏按钮 + 笔记卡 .cd-fav / .nt-card
   ④ 我的 → 收藏与笔记 .mk-*
   ★ 颜色全走主题变量;深色皮肤用 body.theme-galaxy / body.theme-tech
     (全站没有 body.dark),所以写死浅底的地方都在文件末尾补了一份。
   ★ 回退:index.html 删掉 marks.css 那一行。
   ============================================================ */

/* ---------------- ① 学习页顶部搜索条 ---------------- */
.sk-bar {
  display: flex; align-items: center; gap: 9px;
  height: 42px; padding: 0 14px; margin-bottom: 12px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; box-shadow: var(--shadow);
  color: var(--text2); font-size: 14px;
  cursor: text;
}
.sk-bar svg { width: 17px; height: 17px; flex: 0 0 auto; opacity: .75; }
.sk-bar .sk-ph { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sk-bar .sk-go {
  flex: 0 0 auto; font-size: 11px; font-weight: 700; color: var(--primary);
  background: var(--tint); border-radius: 999px; padding: 3px 9px;
}

/* ---------------- ② 搜索页 ---------------- */
.sk-page { padding-bottom: 8px; }
.sk-input {
  display: flex; align-items: center; gap: 9px;
  height: 46px; padding: 0 12px 0 14px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 15px; box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 5;
}
.sk-input svg { width: 18px; height: 18px; flex: 0 0 auto; color: var(--text2); }
.sk-input input {
  flex: 1; min-width: 0; border: 0; padding: 0; background: transparent;
  font-size: 15px; box-shadow: none; border-radius: 0;
}
/* ★ input[type=search] 在 Chrome/Safari 自带一个 ✕,它跟我们自己的 .sk-clear 会并排出现两个 */
.sk-input input::-webkit-search-cancel-button,
.sk-input input::-webkit-search-decoration { -webkit-appearance: none; display: none; }
.sk-input input:focus { box-shadow: none; border: 0; }
.sk-clear {
  flex: 0 0 auto; width: 22px; height: 22px; border-radius: 50%; border: 0;
  background: var(--card2); color: var(--text2); font-size: 12px;
  display: grid; place-items: center; opacity: 0; pointer-events: none;
  transition: opacity .16s;
}
.sk-clear.show { opacity: 1; pointer-events: auto; }

.sk-tip { font-size: 12px; color: var(--text2); margin: 12px 2px 8px; }
.sk-hot { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }
.sk-hot span {
  font-size: 13px; padding: 7px 13px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--border); color: var(--text);
}

.sk-group {
  font-size: 12px; font-weight: 700; color: var(--text2);
  margin: 16px 2px 8px; letter-spacing: .3px;
}
.sk-list { background: var(--card); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); overflow: hidden; }
.sk-item {
  display: flex; align-items: center; gap: 11px;
  padding: 12px 13px; cursor: pointer;
}
.sk-item + .sk-item { border-top: 1px solid var(--border); }
.sk-item:active { background: var(--card2); }
.sk-cov {
  width: 40px; height: 40px; border-radius: 12px; flex: 0 0 auto;
  display: grid; place-items: center; font-size: 17px; color: #fff;
  background: var(--grad);
}
.sk-cov.audio { background: linear-gradient(135deg, #5B7CFA, #9B6BFA); }
.sk-cov.pdf { background: linear-gradient(135deg, #F0A63C, #FF7EB3); }
.sk-cov.article { background: linear-gradient(135deg, #34C77B, #5B7CFA); }
.sk-it-b { min-width: 0; flex: 1; }
.sk-it-b b {
  display: block; font-size: 14px; font-weight: 650; color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.sk-it-b b em { font-style: normal; background: var(--tint); color: var(--primary); border-radius: 4px; padding: 0 2px; }
.sk-it-b span {
  display: block; font-size: 11.5px; color: var(--text2); margin-top: 3px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.sk-st {
  flex: 0 0 auto; font-size: 11px; font-weight: 600;
  color: var(--text2); background: var(--card2); border-radius: 999px; padding: 3px 8px;
}
.sk-st.done { color: #0F8A5F; background: rgba(52,199,89,.12); }
.sk-st.half { color: #B4690E; background: rgba(255,159,10,.14); }
.sk-empty {
  text-align: center; padding: 46px 20px; color: var(--text2); font-size: 13.5px; line-height: 1.9;
}
.sk-empty b { display: block; font-size: 34px; margin-bottom: 8px; opacity: .5; font-weight: 400; }

/* ---------------- ③ 课程详情:收藏按钮 ---------------- */
.cd-fav {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 13px; font-weight: 600; padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--card); color: var(--text);
  transition: transform .12s, background .18s, color .18s, border-color .18s;
}
.cd-fav svg { width: 15px; height: 15px; color: var(--primary); }
.cd-fav:active { transform: scale(.95); }
.cd-fav.on {
  color: var(--primary); border-color: transparent; background: var(--tint);
}
.cd-fav.on svg { fill: currentColor; }
/* 收藏成功时在按钮右边闪一行小字,代替从前那个盖住整页的确认框 */
.cd-fav-tip {
  font-size: 11.5px; color: var(--primary); font-weight: 600;
  opacity: 0; transform: translateX(-4px);
  transition: opacity .22s, transform .22s;
}
.cd-fav-tip.show { opacity: 1; transform: translateX(0); }

/* ---------------- ③ 课程详情:笔记卡 ---------------- */
.nt-card { margin-top: 12px; }
.nt-hd { display: flex; align-items: center; justify-content: space-between; margin-bottom: 9px; }
.nt-hd b { font-size: 14.5px; font-weight: 700; }
.nt-hd span { font-size: 11.5px; color: var(--text2); }
.nt-card textarea {
  width: 100%; min-height: 92px; resize: vertical;
  background: var(--card2); border: 1px solid transparent; border-radius: 13px;
  padding: 12px 13px; font-size: 14px; line-height: 1.68; color: var(--text);
}
.nt-card textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 4px var(--ring); background: var(--card); }
.nt-act { display: flex; align-items: center; justify-content: space-between; margin-top: 9px; }
.nt-act .muted { font-size: 11.5px; }
.nt-saved { font-size: 11.5px; color: #0F8A5F; opacity: 0; transition: opacity .25s; }
.nt-saved.show { opacity: 1; }

/* ---------------- ④ 我的 → 收藏与笔记 ---------------- */
.mk-item {
  display: flex; align-items: center; gap: 11px;
  padding: 12px 13px; cursor: pointer;
}
.mk-item + .mk-item { border-top: 1px solid var(--border); }
.mk-item:active { background: var(--card2); }
.mk-b { min-width: 0; flex: 1; }
.mk-b b {
  display: block; font-size: 14px; font-weight: 650;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.mk-b span {
  display: block; font-size: 11.5px; color: var(--text2); margin-top: 3px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.mk-note-pv {
  font-size: 13px; color: var(--text2); line-height: 1.65; margin-top: 5px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.mk-when { font-size: 11px; color: var(--text2); margin-top: 6px; opacity: .8; }
/* ★ 原来是个只有 ☆ 的小圆钮,主播根本看不出能点 → 直接写「取消收藏」四个字 */
.mk-del {
  flex: 0 0 auto; border: 0; border-radius: 999px; padding: 6px 10px;
  background: var(--card2); color: var(--text2);
  font-size: 11.5px; font-weight: 600; line-height: 1; white-space: nowrap;
}
.mk-del:active { background: var(--border); }

/* ---------------- 深色皮肤(银河系 / 科技霓虹) ---------------- */
body.theme-galaxy .sk-cov.audio,
body.theme-tech .sk-cov.audio { background: linear-gradient(135deg, #38bdf8, #8b5cf6); }
body.theme-galaxy .sk-st.done,
body.theme-tech .sk-st.done { color: #6dffc4; }
body.theme-galaxy .sk-st.half,
body.theme-tech .sk-st.half { color: #ffd76a; }
body.theme-galaxy .nt-saved,
body.theme-tech .nt-saved { color: #6dffc4; }
body.theme-galaxy .sk-input input,
body.theme-tech .sk-input input { background: transparent; }

/* ★ 深色皮肤下 --text2(#8fa0bf) 压在这层灰紫背景上几乎看不见
   (body 的底色渐变里 pro.css 写死了 #F9FAFE,是另一个老问题)。
   这几个"飘在页面上的小字"一律改成 近黑玻璃底 + 浅字,落在什么底上都读得出来。 */
body.theme-galaxy .sk-group,
body.theme-tech .sk-group,
body.theme-galaxy .sk-tip,
body.theme-tech .sk-tip {
  display: inline-block; color: #E6EDF7;
  background: rgba(11, 15, 26, .62);
  border: 1px solid rgba(255, 255, 255, .10);
  padding: 4px 11px; border-radius: 999px;
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
body.theme-galaxy .sk-tip,
body.theme-tech .sk-tip { font-size: 11.5px; padding: 3px 10px; }
body.theme-galaxy .sk-empty,
body.theme-tech .sk-empty {
  color: #E6EDF7; background: rgba(11, 15, 26, .55);
  border-radius: 16px; padding: 18px !important;
}
body.theme-galaxy .mk-when,
body.theme-tech .mk-when { color: #A8B6D0; opacity: 1; }
body.theme-galaxy .cd-fav-tip,
body.theme-tech .cd-fav-tip { color: #7fe3ff; }