:root{
  --bg:#f5f7fb;
  --panel:#ffffff;
  --panel-soft:#fafbfc;
  --line:#e6e9ef;
  --text:#1f2937;
  --muted:#718096;
  --primary:#4f46e5;
  --sidebar:#111827;
  --sidebar-hover:#252f43;
  --sidebar-text:#cbd5e1;
  --ok:#16a34a;
  --bad:#dc2626;
  --info:#2563eb;
  --input-bg:#ffffff;
  --input-border:#d8dde6;
  --topbar:#ffffff;
  --shadow:0 10px 35px rgba(31,41,55,.08);
  --switch-off:#cbd5e1;
  --tag-bg:#eef2ff;
  --tag-text:#4338ca;
  --alert-info-bg:#e0f2fe;
  --alert-info-text:#075985;
  --alert-ok-bg:#dcfce7;
  --alert-ok-text:#166534;
  --alert-bad-bg:#fee2e2;
  --alert-bad-text:#991b1b;
  --account-menu:#ffffff;
  --account-hover:#f3f4f6;
  --segment-bg:#f3f4f6;
  --segment-active:#e5e7eb;
  color-scheme:light;
}

html[data-theme="dark"]{
  --bg:#08090b;
  --panel:#18191d;
  --panel-soft:#1d1f24;
  --line:#2c2e34;
  --text:#f4f4f5;
  --muted:#a1a1aa;
  --primary:#4ade80;
  --sidebar:#090a0c;
  --sidebar-hover:#17191d;
  --sidebar-text:#d4d4d8;
  --ok:#4ade80;
  --bad:#fb7185;
  --info:#60a5fa;
  --input-bg:#111318;
  --input-border:#34363d;
  --topbar:#18191d;
  --shadow:0 10px 35px rgba(0,0,0,.28);
  --switch-off:#52525b;
  --tag-bg:#26322a;
  --tag-text:#86efac;
  --alert-info-bg:#0c344d;
  --alert-info-text:#bae6fd;
  --alert-ok-bg:#123b28;
  --alert-ok-text:#bbf7d0;
  --alert-bad-bg:#4a1d22;
  --alert-bad-text:#fecaca;
  --account-menu:#18191d;
  --account-hover:#22242a;
  --segment-bg:#202126;
  --segment-active:#2a2c32;
  color-scheme:dark;
}

*{box-sizing:border-box}
html,body{background:var(--bg);color:var(--text)}
body{
  margin:0;
  font-family:Inter,"Segoe UI",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  transition:background-color .18s ease,color .18s ease;
}
button,input,select,textarea{font-family:inherit}
a{color:var(--primary);text-decoration:none}
small{display:block;color:var(--muted);margin-top:4px}

/* Layout */
.app-shell{display:flex;min-height:100vh}
.sidebar{
  width:245px;
  background:var(--sidebar);
  color:#fff;
  padding:22px 16px;
  display:flex;
  flex-direction:column;
  position:fixed;
  inset:0 auto 0 0;
  border-right:1px solid rgba(255,255,255,.04);
}
.brand{display:flex;align-items:center;gap:12px;padding:4px 10px 25px}
.brand-logo,.brand-mark{
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(135deg,#4f46e5,#22c55e);
  display:grid;place-items:center;color:#fff;font-weight:800;
}
.brand strong{display:block}
.brand small{color:#94a3b8}
.sidebar nav{display:grid;gap:6px}
.sidebar nav a{color:var(--sidebar-text);padding:12px 14px;border-radius:10px}
.sidebar nav a:hover,.sidebar nav a.active{background:var(--sidebar-hover);color:#fff}
.sidebar-bottom{
  margin-top:auto;border-top:1px solid #2d3748;padding:16px 10px 0;
  display:flex;justify-content:space-between;font-size:13px;
}
.sidebar-bottom a{color:#fca5a5}

.main{margin-left:245px;width:calc(100% - 245px)}
.topbar{
  background:var(--topbar);
  border-bottom:1px solid var(--line);
  padding:22px 30px;
  display:flex;justify-content:space-between;align-items:center;
  position:sticky;top:0;z-index:30;
  transition:background-color .18s ease,border-color .18s ease;
}
.topbar h1{margin:0;font-size:24px}
.topbar p{margin:5px 0 0;color:var(--muted)}
.content{padding:28px}

/* Cards/tables */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:22px}
.stat{
  background:var(--panel);box-shadow:var(--shadow);border:1px solid var(--line);
  padding:20px;border-radius:16px;
}
.stat span{color:var(--muted)}
.stat strong{display:block;font-size:34px;margin-top:7px}
.stat.success strong{color:var(--ok)}
.stat.danger strong{color:var(--bad)}
.stat.info strong{color:var(--info)}

.panel{
  background:var(--panel);border:1px solid var(--line);border-radius:16px;
  box-shadow:var(--shadow);margin-bottom:20px;
}
.panel-head{
  display:flex;justify-content:space-between;align-items:center;
  padding:18px 20px;border-bottom:1px solid var(--line);
}
.panel-head h2,.form-panel h2{margin:0;font-size:18px}
.form-panel{padding:22px}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;font-size:14px;color:var(--text)}
th,td{
  text-align:left;padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top;
}
th{color:var(--muted);font-size:12px;text-transform:uppercase;background:var(--panel-soft)}
.empty{text-align:center;color:var(--muted);padding:35px}
.badge,.tag{display:inline-flex;padding:5px 8px;border-radius:999px;font-size:11px;font-weight:800}
.badge.ok{background:var(--alert-ok-bg);color:var(--alert-ok-text)}
.badge.bad{background:var(--alert-bad-bg);color:var(--alert-bad-text)}
.tag{background:var(--tag-bg);color:var(--tag-text)}
.mono{font-family:Consolas,monospace}
.small{font-size:12px}
.text-danger{color:var(--bad);font-weight:700}

/* Forms */
.toolbar{display:flex;justify-content:space-between;gap:12px;margin-bottom:18px}
.search{display:flex;gap:8px;min-width:420px}
.search input{flex:1}
label{display:block;font-size:13px;font-weight:700;margin-bottom:15px}
input,select,textarea{
  width:100%;margin-top:7px;border:1px solid var(--input-border);
  border-radius:9px;padding:11px 12px;font:inherit;
  background:var(--input-bg);color:var(--text);
}
input:focus,select:focus,textarea:focus{
  outline:2px solid rgba(99,102,241,.28);border-color:#818cf8;
}
.checkline{display:flex;gap:9px;align-items:center;margin-top:28px}
.checkline input{width:auto;margin:0}
.grid{display:grid;gap:16px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.three{grid-template-columns:repeat(3,1fr)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--input-border);background:var(--panel);color:var(--text);
  padding:10px 14px;border-radius:9px;cursor:pointer;font-weight:700;
}
.btn.primary{background:#4f46e5;border-color:#4f46e5;color:#fff}
html[data-theme="dark"] .btn.primary{background:#22c55e;border-color:#22c55e;color:#08110b}
.btn.small{padding:7px 10px;font-size:12px}
.btn.full{width:100%}
.danger-btn{color:#b91c1c}
.actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}
.inline{display:inline-flex;gap:6px}

.alert{padding:12px 14px;border-radius:10px;margin:12px 0}
.alert.danger{background:var(--alert-bad-bg);color:var(--alert-bad-text)}
.alert.success{background:var(--alert-ok-bg);color:var(--alert-ok-text)}
.alert.info{background:var(--alert-info-bg);color:var(--alert-info-text)}
.muted{color:var(--muted)}

/* Auth pages */
.auth-bg{
  min-height:100vh;
  background:
    radial-gradient(circle at top right,rgba(79,70,229,.16),transparent 40%),
    var(--bg);
  display:grid;place-items:center;padding:25px;
}
.login-card,.install-card{
  background:var(--panel);border:1px solid var(--line);
  box-shadow:0 24px 70px rgba(31,41,55,.15);
  border-radius:20px;padding:30px;width:min(430px,100%);
}
.install-card{width:min(720px,100%)}
.login-card .brand-mark,.install-card .brand-mark{margin:0 auto 15px}
.login-card h1,.install-card h1{text-align:center;margin:0}
.login-card p,.install-card p{text-align:center}
.install-card hr{border:0;border-top:1px solid var(--line);margin:20px 0}

/* Settings */
.setting-row{
  display:flex;justify-content:space-between;gap:20px;align-items:center;
  padding:17px 0;border-bottom:1px solid var(--line);
}
.setting-row strong{display:block}
.setting-row p{margin:5px 0 0;color:var(--muted);font-size:13px}
.switch input{display:none}
.switch span{
  display:block;width:46px;height:26px;background:var(--switch-off);
  border-radius:30px;position:relative;cursor:pointer;
}
.switch span:after{
  content:"";position:absolute;width:20px;height:20px;background:#fff;border-radius:50%;
  left:3px;top:3px;transition:.2s;
}
.switch input:checked+span{background:#4f46e5}
html[data-theme="dark"] .switch input:checked+span{background:#22c55e}
.switch input:checked+span:after{left:23px}
.endpoint{
  display:flex;justify-content:space-between;padding:14px 20px;border-bottom:1px solid var(--line);
}
.endpoint code{font-family:Consolas,monospace;color:var(--primary)}
.endpoint span{color:var(--muted)}


/* Theme controls: Sáng / Tối / Theo hệ thống */
.theme-toolbar{
  display:grid;
  grid-template-columns:repeat(3,42px);
  gap:4px;
  padding:4px;
  border:1px solid var(--line);
  background:var(--segment-bg);
  border-radius:10px;
  box-shadow:0 5px 18px rgba(0,0,0,.08);
}
.theme-mode-btn{
  width:42px;
  height:34px;
  border:0;
  border-radius:7px;
  background:transparent;
  color:var(--muted);
  display:grid;
  place-items:center;
  cursor:pointer;
  transition:background .14s ease,color .14s ease,transform .14s ease;
}
.theme-mode-btn:hover{
  background:var(--account-hover);
  color:var(--text);
  transform:translateY(-1px);
}
.theme-mode-btn.active{
  background:var(--segment-active);
  color:var(--primary);
}
html[data-theme="dark"] .theme-mode-btn.active{
  color:#4ade80;
}

/* Responsive */
@media(max-width:1000px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .grid.three{grid-template-columns:1fr 1fr}
  .sidebar{width:210px}
  .main{margin-left:210px;width:calc(100% - 210px)}
}
@media(max-width:760px){
  .sidebar{position:static;width:100%}
  .app-shell{display:block}
  .main{margin:0;width:100%}
  .sidebar nav{grid-template-columns:repeat(2,1fr)}
  .sidebar-bottom{display:none}
  .cards,.grid.two,.grid.three{grid-template-columns:1fr}
  .content{padding:15px}
  .topbar{padding:16px}
  .search{min-width:0;width:100%}
  .toolbar{flex-direction:column}
  .account-menu{right:0}
}


/* =========================================================
   FLOATING + COLLAPSIBLE SIDEBAR
   ========================================================= */

:root{
  --sidebar-open-width: 252px;
  --sidebar-closed-width: 78px;
  --sidebar-gap: 14px;
  --sidebar-radius: 18px;
}

.sidebar{
  width:var(--sidebar-open-width) !important;
  left:var(--sidebar-gap) !important;
  top:var(--sidebar-gap) !important;
  bottom:var(--sidebar-gap) !important;
  right:auto !important;
  height:auto !important;
  padding:14px 12px 12px !important;
  border:1px solid rgba(255,255,255,.07) !important;
  border-radius:var(--sidebar-radius) !important;
  box-shadow:0 18px 48px rgba(0,0,0,.26) !important;
  overflow:hidden !important;
  transition:
    width .22s ease,
    padding .22s ease,
    transform .22s ease !important;
}

html[data-theme="light"] .sidebar{
  box-shadow:0 18px 48px rgba(15,23,42,.15) !important;
  border-color:rgba(148,163,184,.18) !important;
}

.sidebar-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:54px;
  gap:8px;
  margin-bottom:10px;
}

.brand{
  min-width:0;
  padding:0 6px !important;
  gap:10px !important;
}

.brand-logo{
  flex:0 0 42px;
}

.brand-copy{
  min-width:0;
  white-space:nowrap;
  opacity:1;
  transform:translateX(0);
  transition:opacity .15s ease,transform .2s ease;
}

.sidebar-toggle{
  flex:0 0 32px;
  width:32px;
  height:32px;
  border:1px solid rgba(148,163,184,.18);
  border-radius:9px;
  background:rgba(255,255,255,.045);
  color:var(--sidebar-text);
  display:grid;
  place-items:center;
  cursor:pointer;
  transition:background .15s ease,color .15s ease,transform .2s ease;
}

.sidebar-toggle:hover{
  background:rgba(255,255,255,.10);
  color:#fff;
}

.toggle-chevron{
  transition:transform .22s ease;
}

.sidebar-nav{
  display:grid !important;
  gap:6px !important;
}

.sidebar-nav a{
  min-height:44px;
  display:flex !important;
  align-items:center;
  gap:12px;
  padding:10px 12px !important;
  border-radius:11px !important;
  white-space:nowrap;
  overflow:hidden;
  transition:
    background .15s ease,
    color .15s ease,
    padding .22s ease;
}

.sidebar-nav a.active{
  box-shadow:inset 3px 0 0 var(--primary);
}

.nav-icon{
  width:20px;
  height:20px;
  flex:0 0 20px;
  display:grid;
  place-items:center;
  color:currentColor;
}

.nav-label{
  opacity:1;
  transform:translateX(0);
  transition:opacity .15s ease,transform .20s ease;
}

.sidebar-bottom{
  padding:12px 4px 0 !important;
  align-items:center;
  gap:8px;
  min-height:48px;
}

.sidebar-user{
  min-width:0;
  display:flex;
  align-items:center;
  gap:8px;
  overflow:hidden;
}

.user-dot{
  width:28px;
  height:28px;
  flex:0 0 28px;
  border-radius:50%;
  display:grid;
  place-items:center;
  background:rgba(255,255,255,.08);
  color:#fff;
  font-size:11px;
  font-weight:800;
}

.user-name,
.logout-label{
  white-space:nowrap;
  opacity:1;
  transition:opacity .15s ease;
}

.logout-link{
  display:flex;
  align-items:center;
  gap:6px;
  color:#fca5a5 !important;
  white-space:nowrap;
}

/* Main content leaves a gap around the floating sidebar */
.main{
  margin-left:calc(var(--sidebar-open-width) + (var(--sidebar-gap) * 2)) !important;
  width:calc(100% - var(--sidebar-open-width) - (var(--sidebar-gap) * 2)) !important;
  transition:margin-left .22s ease,width .22s ease !important;
}

/* Collapsed state */
html.sidebar-is-collapsed .sidebar{
  width:var(--sidebar-closed-width) !important;
  padding-left:10px !important;
  padding-right:10px !important;
}

html.sidebar-is-collapsed .main{
  margin-left:calc(var(--sidebar-closed-width) + (var(--sidebar-gap) * 2)) !important;
  width:calc(100% - var(--sidebar-closed-width) - (var(--sidebar-gap) * 2)) !important;
}

html.sidebar-is-collapsed .brand-copy,
html.sidebar-is-collapsed .nav-label,
html.sidebar-is-collapsed .user-name,
html.sidebar-is-collapsed .logout-label{
  opacity:0 !important;
  pointer-events:none;
  width:0;
  overflow:hidden;
}

html.sidebar-is-collapsed .sidebar-head{
  flex-direction:column;
  justify-content:flex-start;
  gap:8px;
}

html.sidebar-is-collapsed .brand{
  padding:0 !important;
}

html.sidebar-is-collapsed .brand-logo{
  width:40px;
  height:40px;
  flex-basis:40px;
}

html.sidebar-is-collapsed .sidebar-toggle{
  width:40px;
}

html.sidebar-is-collapsed .toggle-chevron{
  transform:rotate(180deg);
}

html.sidebar-is-collapsed .sidebar-nav a{
  justify-content:center;
  padding-left:10px !important;
  padding-right:10px !important;
}

html.sidebar-is-collapsed .sidebar-nav a.active{
  box-shadow:none;
  background:var(--sidebar-hover);
}

html.sidebar-is-collapsed .sidebar-bottom{
  flex-direction:column;
  justify-content:center;
}

html.sidebar-is-collapsed .sidebar-user{
  justify-content:center;
}

html.sidebar-is-collapsed .logout-link{
  width:40px;
  height:40px;
  justify-content:center;
}

/* Topbar follows the floating panel look */
.topbar{
  margin:var(--sidebar-gap) var(--sidebar-gap) 0 0;
  border:1px solid var(--line) !important;
  border-radius:16px !important;
  box-shadow:0 10px 30px rgba(0,0,0,.08);
  top:var(--sidebar-gap) !important;
}

html[data-theme="dark"] .topbar{
  box-shadow:0 10px 30px rgba(0,0,0,.22);
}

.content{
  padding:20px var(--sidebar-gap) 28px 0 !important;
}

/* Mobile: do not use collapsed desktop sidebar behavior */
@media(max-width:760px){
  .sidebar{
    position:relative !important;
    left:auto !important;
    top:auto !important;
    bottom:auto !important;
    width:auto !important;
    margin:10px !important;
    border-radius:16px !important;
  }

  .main,
  html.sidebar-is-collapsed .main{
    margin-left:0 !important;
    width:100% !important;
  }

  html.sidebar-is-collapsed .sidebar{
    width:auto !important;
  }

  html.sidebar-is-collapsed .brand-copy,
  html.sidebar-is-collapsed .nav-label,
  html.sidebar-is-collapsed .user-name,
  html.sidebar-is-collapsed .logout-label{
    opacity:1 !important;
    width:auto !important;
    pointer-events:auto !important;
  }

  html.sidebar-is-collapsed .sidebar-head{
    flex-direction:row !important;
    justify-content:space-between !important;
  }

  html.sidebar-is-collapsed .sidebar-nav a{
    justify-content:flex-start !important;
  }

  .sidebar-toggle{
    display:none !important;
  }

  .topbar{
    margin:0 10px !important;
    top:0 !important;
  }

  .content{
    padding:15px 10px 24px !important;
  }
}


/* =========================================================
   LEGACY AES ADMIN VIEW
   ========================================================= */
.aes-panel{
  position:relative;
  overflow:visible;
}

.aes-panel-head{
  gap:16px;
}

.aes-panel-head p{
  margin:5px 0 0;
}

.aes-help{
  color:var(--muted);
  font-size:13px;
}

.aes-status{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:84px;
  height:28px;
  padding:0 10px;
  border-radius:999px;
  font-size:11px;
  font-weight:800;
}

.aes-status.ok{
  background:var(--alert-ok-bg);
  color:var(--alert-ok-text);
}

.aes-status.bad{
  background:var(--alert-bad-bg);
  color:var(--alert-bad-text);
}

.aes-warning{
  margin:16px 20px 0;
  padding:12px 14px;
  border-radius:10px;
  background:var(--alert-bad-bg);
  color:var(--alert-bad-text);
  font-size:13px;
}

.aes-secret-row{
  display:grid;
  grid-template-columns:minmax(170px, 240px) minmax(0, 1fr);
  gap:20px;
  align-items:center;
  padding:18px 20px;
  border-bottom:1px solid var(--line);
}

.aes-secret-info strong{
  display:block;
  margin-bottom:4px;
}

.aes-secret-info small{
  margin:0;
}

.aes-secret-control{
  display:grid;
  grid-template-columns:minmax(0, 1fr) 38px 38px;
  gap:8px;
  align-items:center;
}

.aes-secret-input{
  margin:0 !important;
  height:40px;
  letter-spacing:.8px;
  background:var(--input-bg);
}

.aes-icon-btn{
  width:38px;
  height:38px;
  border:1px solid var(--input-border);
  border-radius:9px;
  background:var(--panel-soft);
  color:var(--muted);
  display:grid;
  place-items:center;
  cursor:pointer;
  transition:
    background .14s ease,
    color .14s ease,
    border-color .14s ease,
    transform .14s ease;
}

.aes-icon-btn:hover{
  color:var(--text);
  background:var(--account-hover);
  transform:translateY(-1px);
}

.aes-icon-btn.active{
  color:var(--primary);
  border-color:var(--primary);
}

.server-config-box{
  padding:20px;
}

.server-config-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:14px;
  margin-bottom:12px;
}

.server-config-head strong{
  display:block;
}

.server-config-head small{
  margin-top:4px;
}

.server-config-text{
  width:100%;
  margin:0 !important;
  min-height:158px;
  resize:vertical;
  line-height:1.55;
  white-space:pre;
}

.copy-config-btn{
  white-space:nowrap;
}

.copy-toast{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:1000;
  padding:11px 14px;
  border:1px solid var(--line);
  border-radius:10px;
  background:var(--panel);
  color:var(--text);
  box-shadow:0 14px 38px rgba(0,0,0,.22);
  opacity:0;
  visibility:hidden;
  transform:translateY(8px);
  transition:
    opacity .16s ease,
    visibility .16s ease,
    transform .16s ease;
  font-size:13px;
  font-weight:700;
}

.copy-toast.show{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

@media(max-width:760px){
  .aes-secret-row{
    grid-template-columns:1fr;
    gap:10px;
  }

  .server-config-head{
    align-items:flex-start;
    flex-direction:column;
  }

  .copy-config-btn{
    width:100%;
  }
}


/* =========================================================
   SERVER USERNAME AUTH DIAGNOSTIC
   ========================================================= */
.username-diagnostic-grid{
  display:grid;
  grid-template-columns:repeat(5,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border-bottom:1px solid var(--line);
}

.username-diagnostic-item{
  background:var(--panel);
  padding:16px 18px;
  min-width:0;
}

.username-diagnostic-item span{
  display:block;
  color:var(--muted);
  font-size:12px;
  margin-bottom:7px;
}

.username-diagnostic-item strong{
  display:block;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}

.username-create-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:16px 20px;
  background:var(--alert-bad-bg);
  color:var(--alert-bad-text);
  border-bottom:1px solid var(--line);
}

.username-create-row strong{
  display:block;
}

.username-create-row small{
  margin-top:4px;
  color:inherit;
  opacity:.85;
}

.server-users-list{
  padding:18px 20px 20px;
}

.server-users-list-head{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  margin-bottom:12px;
}

.server-user-chips{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}

.server-user-chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border:1px solid var(--line);
  border-radius:10px;
  background:var(--panel-soft);
  font-weight:700;
}

.server-user-chip small{
  margin:0;
  font-size:10px;
}

.server-user-chip.enabled{
  border-color:rgba(34,197,94,.35);
}

.server-user-chip.enabled small{
  color:var(--ok);
}

.server-user-chip.disabled{
  opacity:.65;
}

@media(max-width:1200px){
  .username-diagnostic-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media(max-width:760px){
  .username-diagnostic-grid{
    grid-template-columns:1fr;
  }

  .username-create-row,
  .server-users-list-head{
    align-items:flex-start;
    flex-direction:column;
  }

  .username-create-row form,
  .username-create-row .btn{
    width:100%;
  }
}