/* ═══════════════════════════════════════════════════════════════════════════
   css/shadowing.css — YTT Shadowing (danh sách kệ chủ đề)  [MS-4 v2]
   Đại tu 2026-07-13 theo feedback Founder: bỏ hero, filter panel có nhãn nhóm,
   card giàu thông tin (pill lượt xem + badge HSK nổi), bố cục thoáng chuyên nghiệp.
   Dark-first tokens trong :root + light override riêng (pattern FEATURE_PROTOCOL)
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --sh-bg:        #14181a;
  --sh-panel:     #1b2124;
  --sh-card:      #1e2529;
  --sh-card-hover:#242d32;
  --sh-input:     #14181a;
  --sh-text:      #eef2f4;
  --sh-sub:       #96a6ac;
  --sh-border:    rgba(255,255,255,0.09);
  --sh-accent:    #4dd0e1;
  --sh-accent-ink:#062b30;
  --sh-danger:    #e05555;
  --sh-danger-ink:#ffffff;
  --sh-skel-a:    #1e2529;
  --sh-skel-b:    #2a343a00;
  --sh-shadow:       0 10px 26px rgba(0,0,0,0.42);
  --sh-shadow-soft:  0 3px 14px rgba(0,0,0,0.28);
  --sh-chip-bg:   rgba(255,255,255,0.06);
  /* Badge HSK — 3 dải */
  --sh-hsk12:     #43a047;
  --sh-hsk34:     #fb8c00;
  --sh-hsk56:     #e53935;
}

html[data-theme="light"] {
  --sh-bg:        #f2f4f7;
  --sh-panel:     #ffffff;
  --sh-card:      #ffffff;
  --sh-card-hover:#ffffff;
  --sh-input:     #f4f6f8;
  --sh-text:      #22313a;
  --sh-sub:       #64757d;
  --sh-border:    rgba(20,40,50,0.12);
  --sh-accent:    #0097a7;
  --sh-accent-ink:#ffffff;
  --sh-danger:    #e04343;
  --sh-danger-ink:#ffffff;
  --sh-skel-a:    #e7eaee;
  --sh-skel-b:    #f2f4f700;
  --sh-shadow:       0 10px 24px rgba(30,50,60,0.14);
  --sh-shadow-soft:  0 2px 10px rgba(30,50,60,0.08);
  --sh-chip-bg:   #eef1f4;
}

* { box-sizing: border-box; }
/* !important thắng inline background của FOUC guard — nếu không, đổi theme
   runtime (toggle từ dashboard) để lộ nền cũ ở phần trang dưới content */
html { background: var(--sh-bg) !important; }
html, body {
  margin: 0; padding: 0;
  background: var(--sh-bg);
  color: var(--sh-text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* Rule S125: element toggle bằng thuộc tính hidden PHẢI có override tường minh */
[hidden] { display: none !important; }

/* ══ FILTER PANEL — nhóm có nhãn (chuẩn chuyên nghiệp) ═══════════════════ */
.sh-filter-panel {
  display: flex; flex-wrap: wrap; align-items: flex-end; gap: 14px 22px;
  max-width: 1240px;
  margin: 20px auto 6px;
  padding: 18px 20px;
  background: var(--sh-panel);
  border: 1px solid var(--sh-border);
  border-radius: 16px;
  box-shadow: var(--sh-shadow-soft);
}
@media (min-width: 992px) {
  .sh-filter-panel { margin-left: 22px; margin-right: 22px; }
}
@media (min-width: 1284px) {
  .sh-filter-panel { margin-left: auto; margin-right: auto; }
}
.sh-f-group { display: flex; flex-direction: column; gap: 7px; }
.sh-f-group--search { flex: 1 1 250px; max-width: 380px; }
.sh-f-label {
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.7px; text-transform: uppercase;
  color: var(--sh-sub);
}
.sh-search { position: relative; display: flex; }
.sh-search input {
  width: 100%;
  background: var(--sh-input);
  border: 1px solid var(--sh-border);
  border-radius: 10px;
  color: var(--sh-text);
  font-family: inherit; font-size: 0.9rem;
  padding: 10px 40px 10px 13px;
  outline: none;
  transition: border-color .15s;
}
.sh-search input:focus { border-color: var(--sh-accent); }
.sh-search input::placeholder { color: var(--sh-sub); }
.sh-search__btn {
  position: absolute; right: 11px; top: 50%; transform: translateY(-50%);
  font-size: 0.85rem; opacity: 0.65; pointer-events: none;
}
.sh-f-select {
  appearance: none; -webkit-appearance: none;
  background: var(--sh-input);
  border: 1px solid var(--sh-border);
  border-radius: 10px;
  color: var(--sh-text);
  font-family: inherit; font-size: 0.88rem; font-weight: 500;
  padding: 10px 34px 10px 13px;
  min-width: 158px;
  cursor: pointer;
  outline: none;
  transition: border-color .15s;
  /* mũi tên ▾ tự vẽ — theme-aware qua currentColor */
  background-image:
    linear-gradient(45deg, transparent 49%, currentColor 51%),
    linear-gradient(135deg, currentColor 49%, transparent 51%);
  background-position: calc(100% - 18px) 55%, calc(100% - 13px) 55%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
}
.sh-f-select:focus { border-color: var(--sh-accent); }
.sh-f-clear {
  margin-left: auto;
  background: var(--sh-danger);
  color: var(--sh-danger-ink);
  border: none; border-radius: 10px;
  font-family: inherit; font-size: 0.85rem; font-weight: 700;
  padding: 11px 18px;
  cursor: pointer;
  transition: filter .15s, transform .1s;
}
.sh-f-clear:hover { filter: brightness(1.08); }
.sh-f-clear:active { transform: scale(0.97); }

/* ══ KỆ CHỦ ĐỀ ═══════════════════════════════════════════════════════════ */
#sh-shelves { max-width: 1240px; margin: 0 auto; padding: 4px 22px 8px; }
.sh-shelf { margin-top: 26px; }
.sh-shelf__head {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px;
}
.sh-shelf__label {
  margin: 0; font-size: 1.06rem; font-weight: 800; letter-spacing: 0.2px;
}
.sh-shelf__count {
  font-size: 0.73rem; font-weight: 600; color: var(--sh-sub);
  background: var(--sh-chip-bg);
  border: 1px solid var(--sh-border);
  padding: 3px 9px; border-radius: 999px;
}
.sh-shelf__more {
  margin-left: auto;
  background: none;
  border: 1px solid var(--sh-border);
  border-radius: 999px;
  cursor: pointer;
  color: var(--sh-accent); font-size: 0.8rem; font-weight: 700;
  padding: 6px 14px; font-family: inherit;
  transition: border-color .15s, background .15s;
}
.sh-shelf__more:hover { border-color: var(--sh-accent); }

.sh-shelf-track {
  display: flex; gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  padding: 4px 2px 12px;
  scrollbar-width: thin;
  scrollbar-color: var(--sh-border) transparent;
}
.sh-shelf-track::-webkit-scrollbar { height: 8px; }
.sh-shelf-track::-webkit-scrollbar-thumb { background: var(--sh-border); border-radius: 4px; }
/* "Xem tất cả" / lọc theo 1 chủ đề → bung grid dọc */
.sh-shelf--expanded .sh-shelf-track { flex-wrap: wrap; overflow-x: visible; }

/* ══ CARD VIDEO ══════════════════════════════════════════════════════════ */
.sh-card {
  flex: 0 0 282px; width: 282px;
  scroll-snap-align: start;
  background: var(--sh-card);
  border: 1px solid var(--sh-border);
  border-radius: 16px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: var(--sh-shadow-soft);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s;
}
.sh-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--sh-shadow);
  border-color: color-mix(in srgb, var(--sh-accent) 45%, transparent);
}
.sh-card:focus-visible { outline: 2px solid var(--sh-accent); outline-offset: 2px; }

.sh-card__thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0c0f11;
}
html[data-theme="light"] .sh-card__thumb { background: #dde3e6; }
.sh-card__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* Pill lượt xem — góc trái trên, nền đen mờ (chuẩn nền tảng video) */
.sh-pill-views {
  position: absolute; top: 9px; left: 9px;
  display: inline-flex; align-items: center; gap: 5px;
  background: rgba(12,14,16,0.78);
  color: #fff;
  font-size: 0.78rem; font-weight: 700;
  padding: 4px 10px; border-radius: 9px;
  backdrop-filter: blur(2px);
}
/* Badge HSK — góc phải trên, to đậm nổi bật */
.sh-badge-hsk {
  position: absolute; top: 9px; right: 9px;
  font-size: 0.78rem; font-weight: 800;
  padding: 4px 11px; border-radius: 9px;
  color: #fff; letter-spacing: 0.3px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.35);
}
.sh-badge-hsk.hsk12 { background: var(--sh-hsk12); }
.sh-badge-hsk.hsk34 { background: var(--sh-hsk34); }
.sh-badge-hsk.hsk56 { background: var(--sh-hsk56); }
.sh-badge-draft {
  position: absolute; top: 42px; right: 9px;
  font-size: 0.64rem; font-weight: 700;
  padding: 3px 8px; border-radius: 7px;
  background: #6d4c41; color: #fff;
}
.sh-card__dur {
  position: absolute; right: 9px; bottom: 9px;
  background: rgba(12,14,16,0.82); color: #fff;
  font-size: 0.72rem; font-weight: 700;
  padding: 3px 7px; border-radius: 6px;
}
.sh-tag-new {
  display: inline-flex; align-items: center;
  background: color-mix(in srgb, var(--sh-accent) 16%, transparent);
  color: var(--sh-accent);
  border: 1px solid color-mix(in srgb, var(--sh-accent) 45%, transparent);
  font-size: 0.64rem; font-weight: 800; letter-spacing: 0.5px;
  padding: 2px 8px; border-radius: 999px;
}

.sh-card__body { padding: 13px 15px 14px; }
.sh-card__title {
  margin: 0 0 9px;
  font-size: 0.95rem; font-weight: 700; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.8em; /* khóa 2 dòng — card cùng hàng không lệch (rule S127) */
}
.sh-card__meta {
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
}
.sh-meta-chip {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--sh-chip-bg);
  border: 1px solid var(--sh-border);
  color: var(--sh-sub);
  font-size: 0.72rem; font-weight: 600;
  padding: 4px 9px; border-radius: 8px;
}
.sh-card__channel {
  margin-top: 9px;
  font-size: 0.74rem; font-weight: 600;
  color: var(--sh-sub);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sh-card__channel b { color: var(--sh-accent); font-weight: 700; }

/* ══ [MS-9] PAGINATION BAR — NỔI cố định đáy màn hình, không trôi khi cuộn ══ */
.sh-pagebar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 60;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 10px 26px;
  padding-bottom: max(10px, env(safe-area-inset-bottom, 10px));
  background: color-mix(in srgb, var(--sh-panel) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--sh-border);
  box-shadow: 0 -6px 18px rgba(0, 0, 0, 0.18);
}
.sh-pagebar[hidden] { display: none; } /* rule S125 */
.sh-pagebar__info { font-size: 0.8rem; color: var(--sh-sub); min-width: 0; }
.sh-pagebar__info b { color: var(--sh-text); }
.sh-pagebar__pager { display: flex; align-items: center; gap: 5px; flex: 0 0 auto; }
.sh-pagebar__pager[hidden] { display: none; } /* rule S125 */
.sh-pg {
  min-width: 34px; height: 34px;
  border: 1px solid var(--sh-border);
  background: var(--sh-input);
  color: var(--sh-sub);
  border-radius: 9px;
  font-family: inherit; font-size: 0.8rem; font-weight: 700;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.sh-pg:hover:not(:disabled) { border-color: var(--sh-accent); color: var(--sh-accent); }
.sh-pg.on {
  background: var(--sh-accent);
  border-color: var(--sh-accent);
  color: var(--sh-accent-ink);
  cursor: default;
}
.sh-pg:disabled { opacity: 0.4; cursor: default; }
.sh-pg-dots { color: var(--sh-sub); font-size: 0.8rem; padding: 0 2px; }
/* Nội dung trang chừa chỗ cho bar nổi — dòng cuối không bị che */
body { padding-bottom: 68px; }

/* ══ SKELETON ════════════════════════════════════════════════════════════ */
@keyframes shShimmer { 0% { background-position: -320px 0; } 100% { background-position: 320px 0; } }
.sh-skel {
  border-radius: 14px;
  background: linear-gradient(90deg, var(--sh-skel-a) 25%, var(--sh-skel-b) 50%, var(--sh-skel-a) 75%);
  background-size: 640px 100%;
  animation: shShimmer 1.3s infinite linear;
}
.sh-skel--label { width: 170px; height: 22px; margin-bottom: 12px; }
.sh-skel--card  { flex: 0 0 282px; height: 256px; }

/* ══ EMPTY / ERROR ═══════════════════════════════════════════════════════ */
.sh-empty { text-align: center; padding: 70px 20px; color: var(--sh-sub); }
.sh-empty__icon { font-size: 2.2rem; display: block; margin-bottom: 10px; }
.sh-empty code {
  display: inline-block; margin-top: 10px;
  background: var(--sh-panel); border: 1px solid var(--sh-border);
  padding: 5px 12px; border-radius: 8px; font-size: 0.8rem;
  color: var(--sh-text);
}

/* ══ WALLS ═══════════════════════════════════════════════════════════════ */
.sh-wall {
  max-width: 460px; margin: 70px auto;
  text-align: center; padding: 38px 28px;
  background: var(--sh-panel);
  border: 1px solid var(--sh-border);
  border-radius: 18px;
  box-shadow: var(--sh-shadow-soft);
}
.sh-wall__icon { font-size: 2.4rem; display: block; margin-bottom: 10px; }
.sh-wall__title { margin: 0 0 8px; font-size: 1.15rem; }
.sh-wall__sub { margin: 0 0 18px; font-size: 0.88rem; color: var(--sh-sub); line-height: 1.55; }
.sh-wall__btn {
  display: inline-block;
  background: var(--sh-accent); color: var(--sh-accent-ink);
  font-weight: 700; font-size: 0.9rem;
  padding: 10px 22px; border-radius: 999px;
  text-decoration: none;
}

/* ══ MOBILE ══════════════════════════════════════════════════════════════ */
@media (max-width: 767px) {
  .sh-filter-panel {
    margin: 12px 12px 4px; padding: 14px;
    gap: 10px 12px;
  }
  .sh-f-group--search { flex: 1 1 100%; max-width: none; }
  .sh-f-group { flex: 1 1 calc(50% - 6px); }
  .sh-f-select { min-width: 0; width: 100%; }
  .sh-f-clear { flex: 1 1 100%; margin-left: 0; }
  #sh-shelves { padding: 2px 12px 8px; }
  .sh-shelf { margin-top: 20px; }
  .sh-card, .sh-skel--card { flex: 0 0 216px; width: 216px; }
  .sh-skel--card { height: 212px; }
  .sh-card__title { font-size: 0.85rem; }
  .sh-pagebar { padding: 8px 14px; padding-bottom: max(8px, env(safe-area-inset-bottom, 8px)); flex-wrap: wrap; }
  .sh-pagebar__info { font-size: 0.72rem; }
  .sh-pg { min-width: 30px; height: 30px; font-size: 0.74rem; }
}