/*
  Modern Nav + Sidebar (Gói 02)
  - Safe overrides for Bootstrap 3 + SB Admin
  - Keeps routing/logic unchanged
*/

:root{
  --nav-bg: rgba(17,24,39,.92);
  --nav-fg: rgba(255,255,255,.88);
  --nav-fg-muted: rgba(255,255,255,.70);
  --nav-border: rgba(255,255,255,.10);

  --side-bg: #0b1220;
  --side-fg: rgba(255,255,255,.76);
  --side-fg-muted: rgba(255,255,255,.62);
  --side-hover: rgba(255,255,255,.08);
  --side-active: rgba(255,255,255,.12);
  --side-border: rgba(255,255,255,.10);
  --sidebar-w: 240px;
}

/* =====================
   Top Navbar
   ===================== */

#navbar1.navbar{
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: top .20s ease;
}

#navbar1 .navbar-brand.navbar-brand-modern{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 56px;
  padding: 8px 16px;
  line-height: 1;
}

#navbar1 .navbar-brand .brand-logo{
  height: 26px;
  width: 26px;
  border-radius: 8px;
  box-shadow: 0 6px 14px rgba(0,0,0,.22);
}

#navbar1 .navbar-brand .brand-title{
  font-weight: 750;
  letter-spacing: .2px;
  font-size: 14px;
  color: var(--nav-fg);
}

#navbar1 .navbar-toggle{
  margin-top: 10px;
  margin-bottom: 10px;
  border-radius: 10px;
}

#navbar1 .navbar-nav>li>a{
  border-radius: 12px;
  margin: 6px 4px;
  padding: 10px 12px;
  color: var(--nav-fg-muted);
}

#navbar1 .navbar-nav>li>a:hover,
#navbar1 .navbar-nav>li>a:focus{
  color: #fff;
  background: rgba(255,255,255,.10);
}

#navbar1 .navbar-nav>li.active>a,
#navbar1 .navbar-nav>li.active>a:hover,
#navbar1 .navbar-nav>li.active>a:focus{
  color: #fff;
  background: rgba(255,255,255,.14);
}

/* Top-right dropdown (user menu) */
#navbar1 .top-nav>li>a{
  border-radius: 12px;
  margin: 6px 4px;
  padding: 10px 12px;
  color: var(--nav-fg-muted);
}

#navbar1 .top-nav>li>a:hover,
#navbar1 .top-nav>li>a:focus,
#navbar1 .top-nav>.open>a,
#navbar1 .top-nav>.open>a:hover,
#navbar1 .top-nav>.open>a:focus{
  color: #fff;
  background: rgba(255,255,255,.10);
}

#navbar1 .dropdown-menu{
  padding: 10px;
}

#navbar1 .dropdown-menu form{
  min-width: 260px;
}

#navbar1 .dropdown-menu input[type="text"],
#navbar1 .dropdown-menu input[type="password"]{
  width: 100%;
  margin: 6px 0 10px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--ui-border);
}

#navbar1 .dropdown-menu input[type="submit"]{
  width: 100%;
  border-radius: 10px;
  padding: 9px 10px;
  border: 0;
  background: #2563eb;
  color: #fff;
  font-weight: 700;
}

#navbar1 .dropdown-menu input[type="submit"]:hover{
  filter: brightness(.95);
}

/* =====================
   Sidebar
   ===================== */

@media(min-width:768px){
  /* Slightly wider sidebar for readability */
  #wrapper{ padding-left: var(--sidebar-w); }

  .side-nav{
    /* Ensure the left sidebar spans full viewport height (user feedback: sidebar was too short) */
    position: fixed !important;
    top: 56px;
    bottom: 0;
    height: calc(100vh - 56px);
    left: 0;
    margin-left: 0;
    width: var(--sidebar-w);
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--side-bg);
    border-right: 1px solid var(--side-border);
    box-shadow: 10px 0 24px rgba(0,0,0,.18);
    padding-bottom: 56px;
  }

  .side-nav>li>a{ width: var(--sidebar-w); }
}

/* Mobile: sidebar lives inside collapse; keep it readable */
@media(max-width:767px){
  .navbar-ex1-collapse{
    background: var(--side-bg);
    border-top: 1px solid var(--side-border);
    max-height: calc(100vh - 56px);
    overflow-y: auto;
  }
  .side-nav{
    position: static;
    width: 100%;
    background: transparent;
  }
}



/* Sidebar resize handle (desktop) */
@media(min-width:768px){
  /* Keep sidebar scrollable; handle must NOT scroll with content */
  .sidebar-resizer-fixed{
    position: fixed;
    top: 56px;
    bottom: 0;
    height: calc(100vh - 56px);
    left: calc(var(--sidebar-w) - 4px);
    width: 8px;
    cursor: col-resize;
    z-index: 1050; /* above sidebar */
  }
  .sidebar-resizer-fixed::before{
    content: "";
    position: absolute;
    top: 0;
    left: 3px;
    width: 2px;
    height: 100%;
    background: rgba(255,255,255,.10);
    opacity: .28;
    transition: opacity .15s ease;
  }
  .sidebar-resizer-fixed:hover::before{
    opacity: .75;
  }

  /* Safety: hide legacy in-sidebar handle if it exists */
  .side-nav .sidebar-resizer{ display:none !important; }
}

body.sidebar-resizing{
  cursor: col-resize;
  user-select: none;
}

/* Navbar button for sidebar size */
#navbar1 .sidebar-size-toggle{
  color: rgba(255,255,255,.78);
  padding: 8px 10px;
  margin-left: 6px;
  border-radius: 10px;
}
#navbar1 .sidebar-size-toggle:hover,
#navbar1 .sidebar-size-toggle:focus{
  color: #fff;
  background: rgba(255,255,255,.10);
  outline: none;
}

/* Sidebar items */
.side-nav{
  padding-top: 6px;
}

.side-nav>li>a{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--side-fg);
  border-radius: 10px;
  margin: 2px 8px;
}

.side-nav>li>a i.fa{
  width: 18px;
  text-align: center;
  opacity: .92;
}

.side-nav li a:hover,
.side-nav li a:focus{
  background: var(--side-hover) !important;
  color: #fff;
}

/* Active state for sidebar (override the legacy .active rule safely) */
.side-nav>li.active>a,
.side-nav>li.active>a:hover,
.side-nav>li.active>a:focus{
  background: var(--side-active) !important;
  color: #fff;
}

/* Sub-menus inside dropdown-container */
.dropdown-container{
  background: transparent !important;
  padding: 0 8px 4px 14px;
}

.dropdown-container ul{
  list-style: none;
  padding-left: 0;
  margin: 0;
  border-left: 1px dashed rgba(255,255,255,.16);
}

.dropdown-container li>a{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  margin: 2px 8px;
  border-radius: 10px;
  color: var(--side-fg-muted);
  text-decoration: none;
}

.dropdown-container li>a:hover{
  background: var(--side-hover);
  color: #fff;
}

.dropdown-container li.active>a{
  background: var(--side-active);
  color: #fff;
}

/* The project uses <font color=...> heavily; keep the hint but avoid neon */
.side-nav font{
  filter: saturate(.9);
}

/* =====================
   Custom dropdown buttons in menu.php
   NOTE: HTML structure is legacy (button contains li), so we skin it.
   ===================== */

.dropdown-btn{
  width: 100%;
  border: 0;
  background: transparent;
  padding: 0;
}

/* Nav groups */
.nav-group-btn{
  margin-top: 6px;
}
.nav-group-btn li.nav-group-title{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: 12px;
  opacity: .92;
  border: 1px solid rgba(255,255,255,.06);
  background: rgba(255,255,255,.03);
}
.nav-group-btn li.nav-group-title .nav-group-text{
  flex:1;
}
.nav-group-btn:hover li.nav-group-title{
  background: rgba(255,255,255,.05);
}
.nav-group-container{
  padding: 2px 8px 6px 12px;
}
.nav-group-container ul.nav-group-list{
  border-left: none;
  padding-left: 0;
  margin: 0;
}

.dropdown-btn li{
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  margin: 2px 8px;
  border-radius: 10px;
  color: var(--side-fg);
}

.dropdown-btn:hover li{
  background: var(--side-hover);
  color: #fff;
}

.dropdown-btn.active li{
  background: var(--side-active);
  color: #fff;
}

.dropdown-btn .fa-caret-down{
  margin-left: auto;
  padding-right: 0;
  opacity: .85;
  transition: transform .16s ease;
}

.dropdown-btn.active .fa-caret-down{
  transform: rotate(180deg);
}

/* Improve scrollbar on desktop sidebar */
@media(min-width:768px){
  .side-nav{
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,.22) transparent;
  }
  .side-nav::-webkit-scrollbar{ width: 10px; }
  .side-nav::-webkit-scrollbar-thumb{
    background: rgba(255,255,255,.18);
    border-radius: 999px;
    border: 3px solid transparent;
    background-clip: padding-box;
  }
}


/* Legacy fallback (in case some pages still use .sidenav/.main) */
@media(min-width:768px){
  .sidenav{ width: var(--sidebar-w); }
  .main{ margin-left: var(--sidebar-w); }
}