:root{
  --gov-blue:#0A6BD6;
  --bg:#2d2723;
  --panel:#3b332f;
  --muted:#d0c5bd;
  --border:#554c47;
  --accent:#ffca63;
  --radius:10px;
  --gap:14px;
  --card-shadow:0 6px 18px rgba(8,32,63,0.04);
  font-family:Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme:dark;
  color:#f4ece6;
}

/* ===============================
   LIGHT MODE (khi người dùng chọn)
   =============================== */
body.light{
  --bg:#f0f4f8;
  --panel:#ffffff;
  --muted:#6b7684;
  --border:#cbd5e0;
  --accent:#0A6BD6;
  --card-shadow:0 2px 8px rgba(0,0,0,0.1);
  color-scheme:light;
  color:#333;
}

/* ============================
   TOPBAR (FIXED)
============================ */
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:12px 20px;
  background:linear-gradient(90deg,#d68e2c,#ffca63);
  color:white;
  gap:0;
  overflow:visible;

  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 36px);
  max-width: calc(100vw - 36px);
  z-index: 999;
  box-sizing: border-box;
  border-radius: 0 0 12px 12px;
  height:68px;
}

.topbar-left{
  display:flex;
  align-items:center;
  gap:8px;
  flex:0 0 auto;
  min-width:0;
  overflow:visible;
  margin-right:auto;
  height:100%;
}

@media (max-width:1000px){
  .topbar-left{
    gap:4px;
  }
}

.brand{
  display:flex;
  gap:8px;
  align-items:center;
}

.brand-logo{
  width:44px;
  height:44px;
  border-radius:10px;
  overflow:hidden;
  background:transparent;
  flex-shrink:0;
  transition:opacity 0.3s ease, transform 0.3s ease;
  cursor:pointer;
}

.brand-logo:hover{
  opacity:0.8;
  transform:scale(1.05);
}

.brand-logo:active{
  opacity:0.6;
  transform:scale(0.95);
}

.brand-logo img{
  width:100%;
  height:100%;
  object-fit:contain;
  transform:scale(1.35);
  cursor:pointer;
  pointer-events:none;
}

.brand-title{
  color:#ffffff !important;
  font-weight:700;
}

.brand-sub{
  color:#ffffff !important;
  font-weight:400;
}

.icon-btn{
  background:transparent;
  border:0;
  color:white;
  font-size:18px;
  padding:8px;
  border-radius:8px;
  cursor:pointer;
}

/* GOOGLE SEARCH BAR */
.topbar-right{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:12px;
  flex:1 1 auto;
  margin-left:auto;
  margin-right:20px;
}

.google-search{
  display:flex;
  align-items:center;
  background:#fff;
  border-radius:24px;
  padding:0 10px;
  height:44px;
  box-shadow:0 2px 5px rgba(0,0,0,0.1);
  border:1px solid transparent;
  transition:all 0.2s;
  flex:1 1 auto;
  min-width:0;
  max-width:300px;
  gap:6px;
}

.google-search:hover{
  box-shadow:0 2px 8px rgba(0,0,0,0.15);
}

.google-search:focus-within{
  box-shadow:0 2px 8px rgba(0,0,0,0.2);
  border-color:#dfe1e5;
}

/* Sidebar search (nhỏ gọn giống thanh tìm kiếm trên header) */
.sidebar-search{
  padding:8px 12px 4px 12px;
}
.sidebar-search-inner{
  display:flex;
  align-items:center;
  background:#fff;
  border-radius:24px;
  padding:6px 10px;
  box-shadow:0 2px 5px rgba(0,0,0,0.1);
  border:1px solid #ff3b30; /* viền đỏ nổi bật quanh ô tìm kiếm */
  gap:6px;
}
.sidebar-search-icon{
  width:18px;
  height:18px;
  color:#9aa0a6;
  flex-shrink:0;
}
.sidebar-search-inner input{
  flex:1;
  border:none;
  outline:none;
  background:transparent;
  font-size:14px;
  color:#000;
  padding:0;
  margin:0;
}

.sidebar-search-clear{
  display:none;
  border:none;
  background:transparent;
  color:#999;
  font-size:16px;
  line-height:1;
  cursor:pointer;
  padding:0 2px 0 4px;
}
.sidebar-search-clear:hover{
  color:#555;
}

/* ===== Modal chia sẻ & QR (sao chép style từ 26_Dev-CPP) ===== */
.modal{
  position:fixed;
  inset:0;
  display:none;
  background:rgba(0,0,0,0.7);
  z-index:999999;
  align-items:center;
  justify-content:center;
  padding:1rem;
  overflow-y:auto;
}
.modal.active{ display:flex; }
.modal-content{
  background:var(--bg,#1b2430);
  border-radius:16px;
  width:100%;
  max-width:600px;
  max-height:90vh;
  display:flex;
  flex-direction:column;
  box-shadow:0 18px 50px rgba(15,23,42,0.45);
}
.modal-medium{ max-width:600px; }
.modal-header{
  padding:1rem 1.25rem;
  border-bottom:1px solid rgba(15,23,42,0.08);
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.modal-header h2{
  font-size:1.25rem;
  font-weight:600;
  margin:0;
}
.modal-close{
  background:none;
  border:none;
  font-size:1.25rem;
  color:#64748b;
  cursor:pointer;
  padding:0.25rem;
}
.modal-close:hover{ color:#0f172a; }
.modal-body{
  padding:1.25rem;
  overflow-y:auto;
}
.share-content{
  display:flex;
  flex-direction:column;
  gap:1.25rem;
}
.share-preview{
  background:#f8fafc;
  border-radius:12px;
  padding:1rem;
  border:1px solid #e2e8f0;
}
.share-preview-info h3{
  font-size:0.95rem;
  margin-bottom:0.25rem;
}
.share-preview-info p{
  font-size:0.875rem;
  color:#64748b;
  line-height:1.5;
}
.share-platforms{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(110px,1fr));
  gap:0.75rem;
}
.share-platform-btn{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:0.35rem;
  padding:0.75rem;
  background:#ffffff;
  border:2px solid #e2e8f0;
  border-radius:12px;
  cursor:pointer;
  transition:all 0.2s ease;
  color:#0f172a;
  font-size:0.8rem;
  font-weight:500;
  min-height:85px;
}
.share-platform-btn:hover{
  border-color:var(--platform-color,#0ea5e9);
  background:#f8fafc;
  transform:translateY(-2px);
}
.share-platform-btn i{
  font-size:1.5rem;
  color:var(--platform-color,#0ea5e9);
}
.share-platform-btn .share-btn-icon{
  width:28px;
  height:28px;
  object-fit:contain;
}
.share-link-section label{
  font-weight:600;
  font-size:0.875rem;
  display:block;
  margin-bottom:0.35rem;
}
.share-link-input{
  display:flex;
  gap:0.5rem;
}
.share-link-input input{
  flex:1;
  padding:0.5rem 0.75rem;
  border:1px solid #e2e8f0;
  border-radius:10px;
  background:#ffffff;
  color:#0f172a;
  font-size:0.875rem;
}
.btn-copy-link{
  padding:0.5rem 1rem;
  background:#0ea5e9;
  color:#fff;
  border:none;
  border-radius:10px;
  cursor:pointer;
  font-weight:500;
  white-space:nowrap;
}
.btn-copy-link:hover{ opacity:0.9; }

/* Nút hành động trong header: Share + Theme (cùng nền, cùng kích thước) */
.header-action-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:36px;
  height:36px;
  padding:0;
  font-size:1rem;
  color:#000000;
  background:#ffffff;
  border:none;
  border-radius:10px;
  cursor:pointer;
  transition:background 0.2s, color 0.2s;
}

.header-action-btn:hover{
  background:#f3f4f6;
}


.google-search .search-icon{
  width:20px;
  height:20px;
  color:#9aa0a6;
  flex-shrink:0;
}

.google-search input[type="text"]{
  flex:1;
  border:none;
  outline:none;
  background:transparent;
  font-size:16px;
  color:#000;
  padding:0;
  margin:0;
  min-width:0;
}

.google-search input[type="text"]::placeholder{
  color:#9aa0a6;
}

.clear-btn{
  display:none;
  width:40px;
  height:40px;
  border:none;
  background:transparent;
  border-radius:50%;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  padding:0;
  color:#70757a;
  flex-shrink:0;
  transition:background 0.2s;
}

.clear-btn.show{
  display:flex;
}

.clear-btn:hover{
  background:#f1f3f4;
}

.clear-btn svg{
  width:20px;
  height:20px;
}

.search-tools{
  display:flex;
  align-items:center;
  gap:4px;
  flex-shrink:0;
  padding-left:8px;
  border-left:1px solid #dfe1e5;
}

.tool-btn{
  width:40px;
  height:40px;
  border:none;
  background:transparent;
  border-radius:50%;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:0;
  color:#70757a;
  transition:background 0.2s;
  flex-shrink:0;
}

.tool-btn:hover{
  background:#f1f3f4;
}

.tool-btn svg{
  width:20px;
  height:20px;
}

/* Dark mode */
body.dark .google-search{
  background:#303134;
  border-color:#5f6368;
}

body.dark .google-search:hover,
body.dark .google-search:focus-within{
  box-shadow:0 2px 8px rgba(0,0,0,0.3);
  border-color:#5f6368;
}

body.dark .google-search .search-icon{
  color:#9aa0a6;
}

body.dark .google-search input[type="text"]{
  color:#fff;
}

body.dark .google-search input[type="text"]::placeholder{
  color:#9aa0a6;
}

body.dark .clear-btn{
  color:#9aa0a6;
}

body.dark .clear-btn:hover{
  background:#3c4043;
}

body.dark .search-tools{
  border-left-color:#5f6368;
}

body.dark .tool-btn{
  color:#9aa0a6;
}

body.dark .tool-btn:hover{
  background:#3c4043;
  color:#e8eaed;
}

/* Responsive */
@media (max-width:1000px){
  .google-search{
    padding:0 8px;
    height:40px;
    max-width:250px;
    gap:4px;
  }
  
  .google-search .search-icon{
    width:18px;
    height:18px;
  }
  
  .google-search input[type="text"]{
    font-size:15px;
  }
  
  .clear-btn,
  .tool-btn{
    width:36px;
    height:36px;
  }
  
  .clear-btn svg,
  .tool-btn svg{
    width:18px;
    height:18px;
  }
}

@media (max-width:768px){
  .google-search{
    padding:0 6px;
    height:36px;
    max-width:220px;
    gap:3px;
  }
  
  .google-search .search-icon{
    width:16px;
    height:16px;
  }
  
  .google-search input[type="text"]{
    font-size:14px;
  }
  
  .clear-btn,
  .tool-btn{
    width:32px;
    height:32px;
  }
  
  .clear-btn svg,
  .tool-btn svg{
    width:16px;
    height:16px;
  }
  
  .search-tools{
    gap:2px;
    padding-left:3px;
  }
}

@media (max-width:480px){
  .google-search{
    padding:0 5px;
    height:32px;
    max-width:200px;
    gap:2px;
  }
  
  .google-search .search-icon{
    width:14px;
    height:14px;
  }
  
  .google-search input[type="text"]{
    font-size:13px;
  }
  
  .clear-btn,
  .tool-btn{
    width:28px;
    height:28px;
  }
  
  .clear-btn svg,
  .tool-btn svg{
    width:14px;
    height:14px;
  }
  
  .search-tools{
    gap:1px;
    padding-left:2px;
  }
}

.ai-mode-btn{
  background:#303134;
  border:1px solid transparent;
  border-radius:20px;
  padding:6px 14px;
  cursor:pointer;
  transition:all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display:flex;
  align-items:center;
  gap:8px;
  color:#ffffff;
  font-size:14px;
  font-weight:500;
  white-space:nowrap;
  flex-shrink:0;
  min-width:auto;
  height:36px;
  overflow:visible;
  z-index:10;
  position:relative;
}

/* Gradient border effect */
.ai-mode-btn::before{
  content:'';
  position:absolute;
  inset:-1px;
  border-radius:20px;
  padding:1px;
  background:linear-gradient(90deg, #4285f4, #34a853, #fbbc04, #ea4335, #4285f4);
  background-size:200% 100%;
  -webkit-mask:linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
  mask-composite:exclude;
  opacity:0;
  transition:opacity 0.3s;
  animation:gradientShift 3s linear infinite;
}

.ai-mode-btn:hover::before{
  opacity:1;
}

@keyframes gradientShift{
  0%{background-position:0% 50%}
  100%{background-position:200% 50%}
}

.ai-mode-btn svg{
  width:18px;
  height:18px;
  flex-shrink:0;
  filter:drop-shadow(0 0 2px rgba(255,255,255,0.3));
}

.ai-mode-btn span{
  white-space:nowrap;
  display:inline-block;
}

.ai-mode-btn:hover{
  background:#3c4043;
  box-shadow:0 2px 8px rgba(0,0,0,0.2);
  transform:translateY(-1px);
}

.ai-mode-btn svg{
  width:18px;
  height:18px;
  flex-shrink:0;
}

#btnTheme{
  flex-shrink:0;
}

/* ============================
   BODY & BACKGROUND
============================ */
body{
  background:var(--bg);
  margin:0;
  min-height:100vh;
}

/* ============================
   LAYOUT
============================ */
.container{
  display:flex;
  gap:18px;
  padding:18px;
  align-items:flex-start;
}

.main{
  flex:1;
  display:flex;
  flex-direction:column;
  gap:12px;
  background:var(--bg);

  /* FIX: tránh topbar che card */
  padding-top:76px !important;
}

/* ============================
   SIDEBAR
============================ */
#overlay{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.45);
  display:none;
  z-index:998;
}

.sidebar{
  position:fixed;
  top:0;
  left:-320px;
  width:auto;
  min-width:fit-content;
  max-width:fit-content;
  height:auto;
  max-height:100vh;
  background:var(--panel);
  border-right:1px solid var(--border);
  padding:12px;
  box-shadow:0 10px 30px rgba(0,0,0,0.28);
  transition:left .28s cubic-bezier(.2,.8,.2,1);
  z-index:999;
  overflow-y:auto;
  white-space:nowrap;
  border-radius:12px;
  margin:12px;
}

.sidebar.open{ left:0; }

.sidebar-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:8px;
}

.sidebar-head h4{
  color:#d82727;
  font-weight:700;
}

.badge{
  background:var(--accent);
  color:white;
  padding:6px 10px;
  border-radius:999px;
  font-weight:700;
  font-size:13px;
}

.folder-tree{
  display:flex;
  flex-direction:column;
  gap:8px;
  padding-bottom:8px;
  width:100%;
}

/* ============================
   TOP MENU (ẨN)
============================ */
.topmenu{ display:none !important; }

/* ============================
   CONTENT + CARD
============================ */
.content{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:14px;
  margin-top:0 !important;
  margin-left:auto;
  margin-right:auto;
  overflow:visible;
  padding:14px;
  max-width:100%;
  box-sizing:border-box;
}

.card{
  display:flex;
  gap:12px;
  padding:12px;
  background:var(--panel);
  border-radius:10px;
  border:1px solid var(--border);
  box-shadow:var(--card-shadow);
  align-items:center;
  transition:transform .12s;
  position:relative;
}

/* BORDER ANIMATION */
.link-card{
  position:relative;
  overflow:visible;
  background:var(--panel);
  border:1px solid var(--border);
  min-height:115px !important;

  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  padding:14px;
  padding-right:50px;
  border-radius:12px;
}

.link-card::before{
  content:"";
  position:absolute;
  inset:-3px;
  border-radius:14px;
  padding:3px;
  background:linear-gradient(120deg,#ff1a1a,#ff7b7b,#ff1a1a);
  background-size:300% 300%;
  animation:borderRun 3s linear infinite;
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite:xor;
          mask-composite:exclude;
  opacity:0;
  transition:opacity .25s;
}

.link-card:hover::before{ opacity:1; }
.link-card:hover{ transform:translateY(-3px); }

@keyframes borderRun{
  0%{background-position:0% 50%}
  50%{background-position:100% 50%}
  100%{background-position:0% 50%}
}

.card-left{
  flex-shrink:0;
  width:44px;
  height:44px;
}

.favicon{
  width:44px;
  height:44px;
  border-radius:8px;
  background:#f0f6ff;
  object-fit:contain;
  image-rendering:-webkit-optimize-contrast;
  image-rendering:crisp-edges;
  -webkit-backface-visibility:hidden;
  backface-visibility:hidden;
  transform:translateZ(0);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.card-body{
  flex:1;
  padding:0 12px;
  overflow:visible;
  display:flex;
  flex-direction:column;
  justify-content:flex-start;
}

.card-title{
  word-wrap:break-word;
  overflow-wrap:break-word;
  word-break:break-word;
  font-size:16px;
  font-weight:600;
  line-height:1.4;
}

.card-url{
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  opacity:.8;
  font-size:14px;
}

.card-actions{
  flex-shrink:0;
  display:none; /* Ẩn hoàn toàn cụm nút copy / mở trên mỗi card */
  flex-direction:column;
  gap:10px;
}

.copy-btn,.open-btn{
  border:1px solid var(--border);
  background:var(--panel);
  cursor:pointer;
  padding:8px 10px;
  border-radius:8px;
  font-size:16px;
  color:var(--muted);
  transition:all 0.2s ease;
  display:flex;
  align-items:center;
  justify-content:center;
  min-width:36px;
  min-height:36px;
}

.copy-btn:hover,.open-btn:hover{
  background:var(--accent);
  color:#fff;
  border-color:var(--accent);
  transform:translateY(-2px);
  box-shadow:0 4px 8px rgba(0,0,0,0.15);
}

.copy-btn:active,.open-btn:active{
  transform:translateY(0);
  box-shadow:0 2px 4px rgba(0,0,0,0.1);
}

/* ===============================
   BADGE SỐ CARD
================================ */
.card-index{
  position:absolute;
  top:5px;
  right:10px;
  background:#e53935;
  color:white;
  padding:4px 10px;
  border-radius:50%;
  font-size:14px;
  font-weight:700;
  border:2px solid #ffffff;
  z-index:20;
  min-width:32px;
  text-align:center;
  box-sizing:border-box;
  white-space:nowrap;
}

/* ===============================
   FOLDER (MENU)
================================ */
.folder{
  padding:12px;
  border-radius:8px;
  background:#fff9e6;
  border:1px solid #e6d9b3;
  box-shadow:0 2px 8px rgba(0,0,0,0.1), 0 1px 3px rgba(0,0,0,0.08);
  display:flex;
  justify-content:space-between;
  align-items:center;
  cursor:pointer;
  transition:all .2s ease;
  position:relative;
  width:100%;
  box-sizing:border-box;
}

.folder:hover{
  transform:translateY(-2px);
  background:#fff9e6;
  box-shadow:0 4px 12px rgba(0,0,0,0.15), 0 2px 6px rgba(0,0,0,0.1);
  border-color:#d4c5a0;
}

.folder-title{
  font-size:14px;
  font-weight:700;
  color:#c41e3a;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
  flex:1;
  min-width:0;
}

.folder-count{
  position:relative;
  top:0;
  right:0;
  background:#ff3b3b;
  color:white;
  padding:4px 8px;
  border-radius:8px;
  font-size:13px;
  font-weight:700;
  flex-shrink:0;
  margin-left:8px;
}

/* Search wrap giữ nguyên màu trắng ở cả dark và light mode */
body.light .card{
  background:#ffffff;
  border-color:#cbd5e0;
  border-width:1.5px;
  box-shadow:0 2px 8px rgba(0,0,0,0.1);
}

body.light .card:hover{
  background:#f8fafc;
  box-shadow:0 4px 12px rgba(0,0,0,0.15);
}

body.light .folder:hover{
  background:#f5f8ff;
}

body.light .folder-title{
  color:var(--gov-blue);
}


body.dark .ai-mode-btn{
  background:#303134;
  color:#ffffff;
}

body.dark .ai-mode-btn:hover{
  background:#3c4043;
}

body.dark .ai-mode-btn::before{
  opacity:0.8;
}

body.dark .ai-mode-btn:hover::before{
  opacity:1;
}

/* Light mode - subtle style */
body.light .ai-mode-btn{
  background:#f8f9fa;
  color:#5f6368;
  border-color:#dadce0;
}

body.light .ai-mode-btn:hover{
  background:#e8eaed;
  border-color:#dadce0;
}

body.light .ai-mode-btn::before{
  opacity:0.6;
}

body.light .ai-mode-btn:hover::before{
  opacity:0.9;
}

/* Ẩn riêng thanh tìm kiếm trên màn hình nhỏ, giữ nút share + theme */
@media (max-width: 992px){
  .google-search{
    display:none;
  }
}

/* ===============================
   RESPONSIVE
================================ */
@media (max-width:1000px){
  .container{ flex-direction:column; padding:12px; }
  .sidebar{ width:auto; max-width:fit-content; left:-100%; }
  .sidebar.open{ left:0; width:auto; max-width:fit-content; }
  
  .topbar{
    padding:8px 12px;
    gap:12px;
  }
  
  .topbar-left{
    gap:8px;
    flex-shrink:0;
  }
  
  .ai-mode-btn{
    padding:6px 12px;
    font-size:13px;
    gap:6px;
    height:36px;
    background:#303134;
  }
  
  .ai-mode-btn svg{
    width:16px;
    height:16px;
  }
}

@media (max-width:768px){
  .topbar{
    padding:6px 8px;
    gap:8px;
    flex-wrap:nowrap;
  }
  
  .topbar-left{
    gap:2px;
    flex-shrink:0;
  }
}

@media (max-width:480px){
  /* KHÔNG ẩn icon - giữ nguyên như hình ảnh */
  
  .topbar{
    padding:4px 6px;
    gap:6px;
    flex-wrap:nowrap;
  }
  
  .topbar-left{
    gap:4px;
    flex-shrink:0;
  }
}

@media (max-width:900px){
  .content{ grid-template-columns:repeat(auto-fill,minmax(100%,1fr)); }
}

/* Màn hình lớn - tăng kích thước nút AI Mode */
@media (min-width:1200px){
  .ai-mode-btn{
    padding:10px 20px;
    font-size:15px;
    gap:10px;
    height:44px;
  }
  
  .ai-mode-btn svg{
    width:20px;
    height:20px;
  }
}
.card-note {
  font-size: 13px;
  color: var(--muted);
  padding-top: 4px;
  opacity: .85;
}
.card-note {
  word-break: break-word;
  line-height: 1.35;
}
.card-body{
  flex:1;
  padding:0 12px;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  justify-content:flex-start;   /* ĐẨY TÊN + LINK LÊN TOP */
}

/* ===== About section (giống ảnh: icon tròn xanh, 2 card, map) ===== */
/* Cùng chiều rộng với topbar (hình 2): màn hình to hay nhỏ đều bằng topbar */
.section.about-section {
  padding: 1.5rem 20px 2rem;
  width: 100%;
  max-width: calc(100vw - 36px);
  margin-left: auto;
  margin-right: auto;
  box-sizing: border-box;
}
/* About tiêu đề: giống hệt 26_Dev-CPP (cùng class .section-title, icon chỉ màu accent) */
.section.about-section .section-title {
  font-family: var(--font-display, inherit);
  font-size: 1.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #0ea5e9;
  display: inline-block;
}
.section.about-section .section-title i {
  margin-right: 0.5rem;
  color: #0ea5e9;
}
body:not(.light) .section.about-section .section-title i {
  color: #79c0ff;
}

.about-contact-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.75rem;
}
.about-contact-card {
  flex: 1;
  min-width: 260px;
  background: var(--panel);
  border-radius: var(--radius);
  padding: 14px 16px;
  border: 1px solid var(--border);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.about-contact-card:hover {
  border-color: #dc3545;
  box-shadow: 0 4px 16px rgba(220,53,69,0.15);
}
.about-contact-card-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 6px;
}
.about-contact-card-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: inherit;
  margin-bottom: 10px;
}
.about-contact-card-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
  font-size: 13px;
  color: inherit;
}
.about-contact-card-row .about-link {
  color: var(--gov-blue) !important;
  text-decoration: none;
}
.about-contact-card-row .about-link:hover {
  text-decoration: underline;
}
.about-contact-icon {
  width: 18px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--gov-blue);
}
.about-contact-icon-img {
  width: 16px;
  height: 16px;
  display: block;
  vertical-align: middle;
}

/* Google Map iframe: Minh Tâm Mart */
.google-map-wrap {
  width: 100%;
  margin-top: 0.5rem;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}
.google-map-wrap iframe {
  width: 100%;
  height: 300px;
  min-height: 260px;
  display: block;
  border: none;
  border-radius: var(--radius);
}
@media (max-width: 768px) {
  .google-map-wrap iframe { height: 280px; min-height: 240px; }
}
.map-btn-directions {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.5rem 1rem;
  background: #0A6BD6;
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.9375rem;
  transition: background 0.2s;
}
.map-btn-directions:hover {
  background: #095aba;
  color: #fff;
  text-decoration: none;
}

/* ===== Thanh tiến trình cuộn trang (như ảnh: gradient xanh, track xám đậm) ===== */
.scroll-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: #2d3748;
  z-index: 1001;
  pointer-events: none;
  overflow: hidden;
}
.scroll-progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #0d9488 0%, #14b8a6 50%, #38bdf8 100%);
  transition: width 0.08s ease-out;
}

/* ===== Floating contact (Phone, Gmail, Zalo, Facebook) ===== */
.floating-contact {
  position: fixed;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 998;
  pointer-events: none;
}
.floating-contact .floating-contact-btn {
  pointer-events: auto;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.floating-contact .floating-contact-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 16px rgba(0,0,0,0.25);
  text-decoration: none;
}
/* Nút gọi: tròn, nền đỏ, icon điện thoại + sóng trắng, shadow nhẹ (y như ảnh) */
.floating-contact-phone {
  background: #e53935;
  color: #fff;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
}
.floating-contact-phone i {
  color: #fff;
  font-size: 1.35rem;
}
.floating-contact-phone img { width: 24px; height: 24px; object-fit: contain; display: block; }

.floating-contact-email {
  background: #fff;
  border: 2px solid #dc3545;
}
.floating-contact-email img { width: 24px; height: 24px; object-fit: contain; display: block; }

.floating-contact-zalo {
  background: #fff;
  border: 2px solid #0068ff;
}
.floating-contact-zalo img { width: 24px; height: 24px; object-fit: contain; display: block; }

/* Giống 26_Dev-CPP: nền trắng, viền xanh nhạt, icon 'f' trắng trong vòng tròn xanh */
.floating-contact-facebook {
  background: #fff;
  border: 2px solid #9bc4f5;
}
.floating-contact-facebook img,
.floating-contact-facebook i { width: 24px; height: 24px; object-fit: contain; display: block; font-size: 1.3rem; color: #fff; }
.floating-contact-facebook i {
  background: #1877F2;
  border-radius: 50%;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  margin: 0 auto;
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 90px;
  width: 50px;
  height: 50px;
  background: var(--gov-blue);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
  transition: transform 0.2s, opacity 0.2s;
  z-index: 997;
  display: flex;
  align-items: center;
  justify-content: center;
}
.back-to-top:hover { transform: scale(1.08); opacity: 0.9; }
.back-to-top.hidden { opacity: 0; pointer-events: none; }

@media (max-width: 768px) {
  .floating-contact { right: 12px; gap: 8px; }
  .floating-contact .floating-contact-btn { width: 46px; height: 46px; }
  .back-to-top { right: 70px; bottom: 20px; width: 44px; height: 44px; }
}