/* ==========================================================================
   Project: Buddhist Literature Digital Library (HTMB)
   Coded by: Thong Chanh with Google AI Gemini
   Start Date: August 26, 2026
   Origin: From Vietnam with love
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Rasa:ital,wght@0,400;0,600;1,400;1,600&display=swap');

:root {
  --reader-font-size: 24px;
  --reader-base-width: 900px;
  --font-normal: 'Rasa', serif;
  --font-italic: 'Rasa', serif;

  --color-phat: #0044ff;
  --color-vua: #d97706;
  --color-chung: #800080;
  --color-bg: #ffffff;
  --color-text: #111827;
  --color-border: #4b5563;
  --color-link: #2563eb;
  --nav-btn-color: #2563eb;
  --pico-border-color: var(--color-border);

  --badge-bg: #5f55e8;
  --badge-text: #ffffff;
  --dots-color: #9ca3af;
  --na-parent-color: #0284c7;
  --na-child-color: #475569;
}

[data-theme="dark"] {
  --color-phat: #60a5fa;
  --color-vua: #fbbf24;
  --color-chung: #c084fc;
  --color-bg: #121212;
  --color-text: #e5e7eb;
  --color-border: #4b5563;
  --color-link: #60a5fa;
  --nav-btn-color: #60a5fa;
  --pico-border-color: var(--color-border);

  --badge-bg: #5f55e8;
  --badge-text: #ffffff;
  --dots-color: #6b7280;
  --na-parent-color: #38bdf8;
  --na-child-color: #cbd5e1;
}

body {
  background-color: var(--color-bg) !important;
  color: var(--color-text) !important;
  padding-bottom: 70px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--color-link);
}

#reader-container {
  font-family: var(--font-normal);
  background-color: var(--color-bg) !important;
  color: var(--color-text) !important;
  max-width: calc(var(--reader-base-width) + (var(--reader-font-size) - 24px) * 18);
  margin: 1.5rem auto;
  padding: 1rem 1.5rem;
  font-size: var(--reader-font-size);
  line-height: 1.7;
  border-radius: 8px;
}

#content-original, #content-translated,
#content-original *, #content-translated * {
  background-color: transparent !important;
  color: var(--color-text) !important;
}

#content-original .quote-phat, #content-translated .quote-phat,
#content-original .quote-phat *, #content-translated .quote-phat * { color: var(--color-phat) !important; font-weight: 500; }

#content-original .quote-vua, #content-translated .quote-vua,
#content-original .quote-vua *, #content-translated .quote-vua * { color: var(--color-vua) !important; font-weight: 500; }

#content-original .quote-chung, #content-translated .quote-chung,
#content-original .quote-chung *, #content-translated .quote-chung * { color: var(--color-chung) !important; font-weight: 500; }

/* Chỉ áp dụng nghiêng Rasa cho thẻ <i>/<em> thông thường, CHẶN can thiệp vào Font Awesome */
#reader-container em, 
#reader-container i:not([class*="fa-"]), 
#reader-container blockquote,
#reader-container [style*="font-style: italic"], 
#reader-container [style*="font-style:italic"] {
  font-family: var(--font-italic) !important;
  font-style: italic !important;
}

#reader-container h1,  #reader-container h2,  #reader-container h3,  #reader-container h4,  #reader-container h5,  #reader-container h6 {   font-family: var(--font-normal) !important; }


@media (max-width: 768px) {
  #reader-container {
    padding-left: 20px !important;
    padding-right: 8px !important;
    max-width: 100% !important;
  }
}

#nav-top {
  position: sticky; top: 0; z-index: 100;
  width: 100%; max-width: calc(var(--reader-base-width) + (var(--reader-font-size) - 24px) * 18); margin: 0 auto;
  background: var(--color-bg); border-bottom: 1px solid var(--color-border);
  transition: opacity 0.4s ease, transform 0.4s ease; opacity: 1;
}
#nav-top.hidden { opacity: 0; pointer-events: none; transform: translateY(-100%); }
.nav-top-grid { display: flex !important; align-items: center !important; justify-content: space-between !important; padding: 0.4rem 0.8rem; }
.nav-top-title { font-weight: bold; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; cursor: pointer; max-width: 50%; color: var(--color-text) !important; }

.nav-btn-group {
  display: flex !important;
  align-items: center !important;
  gap: 0.4rem !important;
}

.nav-btn-group button, 
.nav-btn-group a,
.btn-nav-arrow {
  height: 36px !important;
  min-height: 36px !important;
  line-height: 34px !important;
  padding: 0 0.5rem !important;
  margin: 0 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  box-sizing: border-box !important;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  text-decoration: none;
  font-weight: bold;
}

@media (max-width: 768px) {
  .nav-btn-group button, 
  .nav-btn-group a {
    height: 34px !important;
    min-height: 34px !important;
    min-width: 34px !important;
    padding: 0 6px !important;
    font-size: 0.85rem !important;
  }
}

#nav-bottom {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 1000;
  height: 55px; background: var(--color-bg); border-top: 1px solid var(--color-border);
  display: flex !important; align-items: center !important; justify-content: space-between !important; padding: 0 1rem; width: 100% !important; gap: 8px !important;
}

#nav-bottom .nav-btn-group:first-child {
  flex: 0 1 auto !important;
  display: flex !important;
  align-items: center !important;
  gap: 1px !important;
  min-width: 0 !important;
  max-width: calc(100% - 220px) !important;
}

#nav-bottom .nav-btn-group:last-child {
  flex: 0 0 auto !important;
  display: flex !important;
  align-items: center !important;
  gap: 1px !important;
}

#nav-bottom button.btn-toc-search {
  width: auto !important;
  max-width: 100% !important;
  height: 32px !important;
  padding: 0 8px !important;
  margin: 0 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  box-sizing: border-box !important;
  white-space: nowrap !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
}

#nav-bottom button.btn-toc-search .toc-title-text {
  display: inline !important;
  overflow: hidden !important;
  text-overflow: ellipsis !important;
  white-space: nowrap !important;
}

#nav-bottom button.btn-toc-search .toc-icon-mobile {
  display: none !important;
}

#nav-top button, #nav-top a, #nav-top .btn-nav-arrow,
#nav-bottom button, #nav-bottom a, #nav-bottom .btn-nav-arrow {
  color: var(--nav-btn-color) !important;
  border-color: var(--nav-btn-color) !important;
}

#nav-top button.btn-size-active, #nav-bottom button.btn-size-active, .btn-size-active {
  color: #ef4444 !important;
  border-color: #ef4444 !important;
  font-weight: bold;
}

#sidebar-panel, .sidebar-panel {
  position: fixed; top: 60px; right: -320px; width: 280px;
  max-width: 85vw !important;
  max-height: calc(100vh - 80px); height: auto;
  background-color: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: 12px; box-shadow: -4px 4px 20px rgba(0,0,0,0.3);
  padding: 1.2rem; z-index: 1000; transition: right 0.3s ease;
  overflow-y: auto; overflow-x: hidden !important; display: flex; flex-direction: column;
}
[data-theme="dark"] #sidebar-panel { background-color: #1a1d24; }
#sidebar-panel.open { right: 15px; }

#sidebar-panel *, .sidebar-panel * {
  max-width: 100% !important;
  box-sizing: border-box !important;
}

.toc-box { max-height: 45vh; overflow-y: auto; border: 1px solid var(--color-border); padding: 0.8rem; border-radius: 6px; }
.toc-tree, .toc-tree ul { list-style: none; padding-left: 1.2rem; margin: 0; }
.toc-tree a.active { font-weight: bold; color: var(--color-link); }

#rest-overlay { display: none; position: fixed; top:0; left:0; width:100vw; height:100vh; background: rgba(0,0,0,0.9); color:#fff; z-index:9999; text-align:center; padding-top:30vh; }

.share-box { border: 1px solid var(--color-border); padding: 0.8rem; border-radius: 6px; margin-bottom: 1rem; text-align: center; }
.share-btn-group { display: flex; gap: 0.5rem; justify-content: center; margin-top: 0.5rem; }
.modal-footer-btns { display: flex; gap: 0.5rem; justify-content: flex-end; margin-top: 1rem; }

#content-original h1, #content-translated h1, .reader-body h1 { font-size: 1.6em !important; line-height: 1.3; }
#content-original h2, #content-translated h2, .reader-body h2 { font-size: 1.35em !important; line-height: 1.35; }
#content-original h3, #content-translated h3, .reader-body h3 { font-size: 1.15em !important; line-height: 1.4; }

.tab-nav { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; border-bottom: 2px solid var(--color-border); }
.tab-nav .tab-btn {
  background: transparent; border: none; color: var(--color-text);
  font-weight: 500; padding: 0.5rem 1rem; cursor: pointer; opacity: 0.7;
  transition: all 0.2s ease; border-bottom: 2px solid transparent;
}
.tab-nav .tab-btn:hover { opacity: 1; color: var(--nav-btn-color); }
.tab-nav .tab-btn.active {
  opacity: 1; color: var(--nav-btn-color) !important;
  border-bottom: 2px solid var(--nav-btn-color) !important; font-weight: 600;
}
.btn-close-trans { background: transparent; border: none; color: var(--color-text); opacity: 0.6; font-size: 1.1rem; cursor: pointer; }
.btn-close-trans:hover { opacity: 1; color: var(--nav-btn-color); }

.breadcrumb-stair { display: flex; flex-direction: column; gap: 4px; padding: 10px 0; border-bottom: 1px solid var(--color-border); margin-bottom: 15px; }
.bc-item { display: flex; align-items: center; white-space: nowrap; overflow: hidden; max-width: 100%; }
.bc-item.level-0 { padding-left: 0; }
.bc-item.level-1 { padding-left: 12px; }
.bc-item.level-2 { padding-left: 24px; }
.bc-item.level-3 { padding-left: 36px; }
.bc-item.level-4 { padding-left: 48px; }
.bc-arrow { margin-right: 6px; opacity: 0.6; font-size: 0.85rem; }
.bc-text { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--nav-btn-color); text-decoration: none; }
.bc-text.active { color: var(--color-text); font-weight: 600; }

.poem-table { border-collapse: collapse; border: none !important; margin: 1rem 0; width: auto; }
.poem-table td { padding: 3px 0 !important; border: none !important; line-height: 1.6; }
@media (max-width: 767px) { .poem-table { margin-left: 2.5rem !important; } }
@media (min-width: 768px) and (max-width: 1023px) { .poem-table { margin-left: 6rem !important; } }
@media (min-width: 1024px) { .poem-table { margin-left: 10rem !important; } }

blockquote.quote-phat, table.quote-phat, p.quote-phat, div.quote-phat { border-left: 4px solid #0044ff !important; padding-left: 12px !important; }
blockquote.quote-vua, table.quote-vua, p.quote-vua, div.quote-vua { border-left: 4px solid #d97706 !important; padding-left: 12px !important; }
blockquote.quote-chung, table.quote-chung, p.quote-chung, div.quote-chung { border-left: 4px solid #800080 !important; padding-left: 12px !important; }
ul.quote-phat, ol.quote-phat, ul.quote-vua, ol.quote-vua, ul.quote-chung, ol.quote-chung { border-left: none !important; padding-left: 20px !important; }

/* Thừa hưởng màu nút Nav / Ô Search (--nav-btn-color) */
.badge, 
.badge-purple, 
.badge-primary, 
.p0-badge-count,
.nav-top-grid .badge,
toggle-badge,
#nav-top .badge {
  display: inline-block !important; 
  padding: 0.15em 0.6em !important; 
  font-size: 0.78rem !important; 
  font-weight: 600 !important;
  line-height: 1.2 !important; 
  color: #ffffff !important; 
  background-color: var(--nav-btn-color) !important;
  border-radius: 50rem !important; 
  vertical-align: middle !important; 
  margin: 0 2px !important;
  border: none !important;
}

[data-tooltip] { border-bottom: 1.5px dotted #5f55e8; color: #5f55e8; cursor: help; position: relative; display: inline-block; }
[data-tooltip]:hover::before, [data-tooltip]:hover::after { left: 0 !important; transform: none !important; }
[data-tooltip]:hover::before { bottom: 100% !important; margin-bottom: 6px !important; white-space: normal !important; max-width: 260px !important; width: max-content !important; z-index: 9999 !important; }
[data-tooltip]:hover::after { bottom: 100% !important; margin-bottom: 0px !important; margin-left: 12px !important; z-index: 10000 !important; }

.htmb-tabs { display: flex; flex-direction: column; margin: 1.5rem 0; }
.htmb-tabs input[type="radio"] { display: none; }
.htmb-tab-header { display: flex; gap: 4px; margin-bottom: -1px; z-index: 2; }
.htmb-tab-header label {
  padding: 8px 18px; margin: 0; cursor: pointer;
  border: 1px solid var(--color-border) !important; border-bottom: none !important;
  border-radius: 6px 6px 0 0; font-weight: 500; color: var(--color-text); opacity: 0.65;
  background: rgba(127, 127, 127, 0.08); transition: all 0.2s ease;
}
.htmb-tabs input[type="radio"]:nth-of-type(1):checked ~ .htmb-tab-header label:nth-child(1),
.htmb-tabs input[type="radio"]:nth-of-type(2):checked ~ .htmb-tab-header label:nth-child(2),
.htmb-tabs input[type="radio"]:nth-of-type(3):checked ~ .htmb-tab-header label:nth-child(3),
.htmb-tabs input[type="radio"]:nth-of-type(4):checked ~ .htmb-tab-header label:nth-child(4),
.htmb-tabs input[type="radio"]:nth-of-type(5):checked ~ .htmb-tab-header label:nth-child(5),
.htmb-tabs input[type="radio"]:nth-of-type(6):checked ~ .htmb-tab-header label:nth-child(6),
.htmb-tabs input[type="radio"]:nth-of-type(7):checked ~ .htmb-tab-header label:nth-child(7),
.htmb-tabs input[type="radio"]:nth-of-type(8):checked ~ .htmb-tab-header label:nth-child(8) {
  opacity: 1; background: var(--color-bg); color: var(--color-text);
  border-color: var(--color-border) !important;
  border-bottom: 1px solid var(--color-bg) !important;
}
.htmb-tab-content {
  border: 1px solid var(--color-border) !important; border-radius: 0 6px 6px 6px;
  padding: 16px; background: var(--color-bg); color: var(--color-text); position: relative; z-index: 1;
}
.htmb-tab-content > div { display: none; }
.htmb-tabs input[type="radio"]:nth-of-type(1):checked ~ .htmb-tab-content > div:nth-child(1),
.htmb-tabs input[type="radio"]:nth-of-type(2):checked ~ .htmb-tab-content > div:nth-child(2),
.htmb-tabs input[type="radio"]:nth-of-type(3):checked ~ .htmb-tab-content > div:nth-child(3),
.htmb-tabs input[type="radio"]:nth-of-type(4):checked ~ .htmb-tab-content > div:nth-child(4),
.htmb-tabs input[type="radio"]:nth-of-type(5):checked ~ .htmb-tab-content > div:nth-child(5),
.htmb-tabs input[type="radio"]:nth-of-type(6):checked ~ .htmb-tab-content > div:nth-child(6),
.htmb-tabs input[type="radio"]:nth-of-type(7):checked ~ .htmb-tab-content > div:nth-child(7),
.htmb-tabs input[type="radio"]:nth-of-type(8):checked ~ .htmb-tab-content > div:nth-child(8) { display: block; }

.htmb-accordion { border: 1px solid var(--color-border) !important; border-radius: 6px; overflow: hidden; margin: 1.5rem 0; }
.htmb-accordion details { margin: 0 !important; padding: 0 !important; border: none !important; border-bottom: 1px solid var(--color-border) !important; }
.htmb-accordion details:last-child { border-bottom: none !important; }
.htmb-accordion summary {
  padding: 12px 16px !important; margin: 0 !important; font-weight: 600; color: var(--color-text);
  background: rgba(127, 127, 127, 0.08) !important; cursor: pointer; transition: background 0.2s ease;
  outline: none !important; box-shadow: none !important;
}
.htmb-accordion summary:focus, .htmb-accordion summary:focus-visible, .htmb-accordion details[open] > summary:focus { outline: none !important; box-shadow: none !important; }
.htmb-accordion summary:hover { background: rgba(127, 127, 127, 0.15) !important; }
.htmb-accordion details > p, .htmb-accordion details > div {
  padding: 16px; margin: 0; color: var(--color-text); background: var(--color-bg);
  border-top: 1px solid var(--color-border) !important;
}

.search-3-parts { 
  display: flex; 
  gap: 0; 
  margin-bottom: 1rem; 
  width: 100%; 
}

.search-3-parts input[type="search"] {
  flex: 1 1 50% !important;
  min-width: 50% !important;
  border: 1px solid var(--color-border) !important; 
  border-right: none !important;
  border-top-left-radius: 5rem !important; 
  border-bottom-left-radius: 5rem !important;
  border-top-right-radius: 0 !important; 
  border-bottom-right-radius: 0 !important;
  margin-bottom: 0 !important; 
  background-color: var(--color-bg) !important;
  color: var(--color-text) !important; 
  box-shadow: none !important; 
  outline: none;
}

.search-3-parts select {
  flex: 0 1 auto;
  width: auto; 
  max-width: 35%;
  border: 1px solid var(--color-border) !important;
  border-right: none !important; 
  border-radius: 0 !important; 
  margin-bottom: 0 !important;
  padding-left: 0.4rem !important;
  padding-right: 1.5rem !important; 
  font-size: 0.82rem; 
  background-color: var(--color-bg) !important;
  color: var(--color-text) !important; 
  box-shadow: none !important; 
  outline: none;
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}

.search-3-parts button {
  flex: 0 0 auto;
  border: 1px solid var(--color-border) !important;
  border-top-left-radius: 0 !important; 
  border-bottom-left-radius: 0 !important;
  border-top-right-radius: 5rem !important; 
  border-bottom-right-radius: 5rem !important;
  margin-bottom: 0 !important; 
  padding: 0 0.8rem !important; 
  white-space: nowrap;
  display: flex; 
  align-items: center; 
  justify-content: center;
  background-color: var(--nav-btn-color) !important; 
  color: #ffffff !important;
}

.search-3-parts input[type="search"]:focus, 
.search-3-parts select:focus { 
  z-index: 2; 
  border-color: var(--nav-btn-color) !important; 
}

.es-results-list { list-style: none; padding: 0; margin: 1rem 0; max-height: 380px; overflow-y: auto; }
.es-results-list li { padding: 0.8rem; margin-bottom: 0.5rem; border: 1px solid var(--color-border); border-radius: 6px; background: var(--color-bg); }
.es-results-list a { font-weight: bold; font-size: 1rem; text-decoration: none; display: block; margin-bottom: 0.3rem; }
.es-results-list .es-snippet { font-size: 0.88rem; color: var(--color-text); line-height: 1.4; }
.es-results-list mark { background-color: #fef08a; color: #854d0e; padding: 0 2px; border-radius: 2px; font-weight: bold; }

header, footer, nav, #nav-top, .nav-bottom, #nav-bottom { border: none !important; box-shadow: none !important; }
hr { display: none !important; }
main, article, .container, .content-box, .reader-container, dialog article { border: none !important; box-shadow: none !important; outline: none !important; }

#nav-top .btn-prev-chap, #nav-top .btn-next-chap, #nav-top button:first-child, #nav-top button:last-child {
  min-width: 38px !important; height: 38px !important; padding: 0 !important; display: inline-flex !important;
  align-items: center !important; justify-content: center !important; flex-shrink: 0 !important; box-sizing: border-box !important;
}

.toc-icon-mobile { display: none; }

@media (max-width: 768px) {
  #nav-bottom .btn-bottom-prev,
  #nav-bottom .btn-bottom-next,
  #nav-bottom .btn-bottom-theme,
  .nav-bottom .btn-prev-chap, 
  .nav-bottom .btn-next-chap,
  .nav-bottom button[onclick*="prev"], 
  .nav-bottom button[onclick*="next"],
  .nav-bottom .btn-theme-toggle, 
  .nav-bottom button[onclick*="toggleTheme"] { 
    display: none !important; 
  }

  #nav-bottom .toc-title-text { display: none !important; }
  #nav-bottom .toc-icon-mobile { display: inline !important; }

  #nav-bottom .btn-toc-search,
  .nav-bottom .btn-search-toc { 
    width: auto !important;
    min-width: 40px !important; 
    padding: 0 8px !important; 
    justify-content: center !important; 
  }
}

@media (min-width: 769px) {
  .nav-bottom .btn-theme-toggle, .nav-bottom button[onclick*="toggleTheme"] { display: inline-flex !important; }
}

#box-relax-compact { margin-top: 1rem !important; }

.switch {
  position: relative;
  display: inline-block;
  vertical-align: middle;
}

.switch input {
  opacity: 0 !important;
  width: 0 !important;
  height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  position: absolute !important;
}

.switch .slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: #4b5563;
  transition: background-color .3s ease;
  overflow: hidden;
}

.switch .slider:before {
  position: absolute;
  content: "";
  background-color: #ffffff;
  transition: transform .3s ease;
  border-radius: 50%;
  top: 50%;
}

.theme-switch-wrapper .switch { width: 44px; height: 22px; }
.theme-switch-wrapper .slider:before {
  height: 16px; width: 16px;
  left: 3px;
  transform: translateY(-50%);
}
.theme-switch-wrapper input:checked + .slider { background-color: #2563eb; }
.theme-switch-wrapper input:checked + .slider:before { transform: translate(22px, -50%); }

#box-relax-compact .switch { width: 34px; height: 18px; }
#box-relax-compact .slider:before {
  height: 14px; width: 14px;
  left: 2px;
  transform: translateY(-50%);
}
#box-relax-compact input:checked + .slider { background-color: #16a34a; }
#box-relax-compact input:checked + .slider:before { transform: translate(16px, -50%); }

.htmb-ad-sticky-mobile { display: none; }
.page-badge { display: inline-block;color:var(--nav-btn-color) }
@media (max-width: 768px) {
  .htmb-ad-sticky-mobile {
    display: block;
    position: fixed;
    bottom: 50px;
    left: 0;
    width: 100%;
    z-index: 99;
    text-align: center;
    background: rgba(255, 255, 255, 0.95);
  }
  .page-badge {
    display: none !important;
  }
  #reader-container { padding-bottom: 60px; }
}

.fav-icon {
  font-size: 0.75em;
  margin-left: 4px;
  vertical-align: middle;
  display: inline-block;
}

.p0-book-container {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
  box-sizing: border-box;
  text-align: left;
}

.p0-hero-card {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.p0-toc-section {
  margin: 1.5rem 0;
}

.p0-toc-row {
  display: flex !important;
  align-items: center !important;
  width: 100% !important;
  box-sizing: border-box !important;
}

.p0-toc-row a {
  flex-shrink: 0 !important;
}

.p0-toc-dots {
  flex: 1 1 auto !important;
  border-bottom: 1px dotted var(--dots-color) !important;
  margin: 0 8px !important;
  height: 1px !important;
  align-self: center !important;
}


/* ==========================================================================
   CARD HTMB (Hỗ trợ tự động đổi màu theo Light/Dark Mode)
   ========================================================================== */
.card-htmb {
  /* Biến cấu hình: a.Thông có thể tự chỉnh % hoặc mã màu tùy ý ở đây */
  --card-light-offset: 4%;   /* Độ tối hơn khi ở Light Mode (y%) */
  --card-dark-offset: 6%;    /* Độ sáng hơn khi ở Dark Mode (x%) */
  
  background-color: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.2rem;
  margin: 1rem 0;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Light mode: Nền tối hơn màu chung một chút, màu chữ đậm/thay đổi nhẹ */
:root:not([data-theme="dark"]) .card-htmb {
  background-color: color-mix(in srgb, var(--color-bg) (100% - var(--card-light-offset)), #000000 var(--card-light-offset));
  color: color-mix(in srgb, var(--color-text) 90%, var(--nav-btn-color) 10%);
}

/* Dark mode: Nền sáng hơn màu chung một chút, màu chữ mềm hơn */
[data-theme="dark"] .card-htmb {
  background-color: color-mix(in srgb, var(--color-bg) (100% - var(--card-dark-offset)), #ffffff var(--card-dark-offset));
  color: color-mix(in srgb, var(--color-text) 92%, #ffffff 8%);
}
.toggle-badge{cursor:pointer; font-size:0.75rem; color:var(--color-bg)!important; padding:0.15rem 0.5rem; border-radius:12px; white-space:nowrap; margin-left:0.5rem;}
/* Xóa bỏ đường viền dọc cũ nếu còn sót, thiết lập vị trí tương đối cho danh sách ul */
/* ==========================================================================
   CẤU TRÚC DANH SÁCH & MỤC LỤC (.na) - GẠCH NGANG CÁCH 15PX
   ========================================================================== */

/* ==========================================================================
   CẤU TRÚC DANH SÁCH & MỤC LỤC (.na) - GỌN GÀNG & CANH ĐÚNG TÂM ICON
   ========================================================================== */

/* 1. Cấp gốc ngoài cùng: Sạch sẽ, phẳng tuyệt đối */
.na-list {
  list-style: none !important;
  margin: 0.2rem 0 !important;
  padding-left: 0 !important;
}

.na-item {
  position: relative !important;
  margin: 0.2rem 0 !important; /* Thu hẹp khoảng cách các dòng cho sát lại */
  font-size: 0.95rem !important;
}

/* 2. CẤU TRÚC CHO CÁC CẤP CON BÊN TRONG */
.na-list .na-list {
  position: relative !important;
  padding-left: 1.4rem !important; 
  margin: 0.1rem 0 !important;
}

/* Đường kẻ thẳng đứng: Dịch sang phải (left: 10px) để khớp chuẩn ngay dưới icon cha */
.na-list .na-list::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0.5rem;
  left: 10px; 
  border-left: 1px dashed red; /* Đổi màu tùy ý */
}

/* Nét gạch ngang kết nối (--) nối từ đường dọc vào mục con */
.na-list .na-list .na-item::before {
  content: "";
  position: absolute;
  top: 0.75rem;
  left: -0.6rem;
  width: 0.9rem;
  border-top: 1px dashed red;
}

/* 3. Màu sắc văn bản & hiệu ứng tương tác */
.na-parent {
  text-decoration: none !important;
  color: var(--nav-btn-color) !important;
  font-weight: bold !important;
}

.na-child {
  text-decoration: none !important;
  color: var(--color-text) !important;
  opacity: 0.88;
  transition: color 0.2s ease, opacity 0.2s ease;
}

.na-child:hover,
.na-parent:hover {
  opacity: 1;
  color: var(--nav-btn-color) !important;
  text-decoration: underline !important;
}

/* Đường kẻ thẳng đứng: Dừng đúng ngay tại vị trí của nhánh ngang mục cuối */
.na-list .na-list::before {
  content: "";
  position: absolute;
  top: -0.2rem;
  bottom: 1.1rem; /* Điều chỉnh lại điểm kết thúc phía dưới cho khớp với nhánh ngang */
  left: 10px; 
  border-left: 1px dashed red;
}

/* Nét gạch ngang kết nối (--): Hạ thấp xuống một chút nữa */
.na-list .na-list .na-item::before {
  content: "";
  position: absolute;
  top: 1.1rem; /* Tăng từ 0.95rem lên 1.1rem để hạ thấp nhánh ngang xuống đúng tâm */
  left: -0.6rem;
  width: 0.9rem;
  border-top: 1px dashed red;
}