/*
 * NS SSO — app.css
 * CSS thuần ánh xạ token từ DESIGN.md. Không phụ thuộc Node/Tailwind CLI.
 * Tailwind class trong templ được map qua custom property + utility class bên dưới.
 *
 * Cấu trúc:
 *   1. Custom properties (design tokens)
 *   2. Reset / base
 *   3. Utility classes (Tailwind-compatible names)
 *   4. Component classes (card, button, form)
 *   5. Dark mode overrides (@media prefers-color-scheme: dark)
 */

/* =========================================================
   1. Design Tokens — Custom Properties
   ========================================================= */
:root {
  /* Brand */
  --color-brand-deep:         #1A2744;
  --color-brand-primary:      #2563EB;
  --color-brand-primary-dark: #1D4ED8;
  --color-brand-primary-light:#3B82F6;

  /* Surface (light) */
  --color-page:               #F8FAFC;
  --color-page-2:             #E9EEF5;   /* điểm cuối gradient nền trang auth */
  --color-card:               #FFFFFF;
  --color-card-border:        #E5E9F0;   /* viền card (tinh tế ở light) */
  --color-input-bg:           #FFFFFF;
  --color-border:             #CBD5E1;
  --color-border-focus:       #2563EB;

  /* Color scheme cho native control (input, scrollbar) khớp theme */
  color-scheme: light;

  /* Text (light) */
  --color-text-primary:       #1E293B;
  --color-text-secondary:     #64748B;
  --color-text-placeholder:   #94A3B8;
  --color-text-inverse:       #FFFFFF;
  --color-text-on-brand:      #FFFFFF;

  /* Semantic */
  --color-danger:             #B91C1C;
  --color-danger-bg:          #FEF2F2;
  --color-danger-btn:         #DC2626;
  --color-danger-border:      #FECACA;
  --color-success:            #15803D;
  --color-success-bg:         #F0FDF4;
  --color-success-btn:        #16A34A;
  --color-warning:            #B45309;
  --color-warning-bg:         #FFFBEB;

  /* Typography */
  --font-sans:  'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:  'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Radius */
  --radius-sm:  0.25rem;   /* 4px */
  --radius-md:  0.5rem;    /* 8px */
  --radius-lg:  0.75rem;   /* 12px */
  --radius-xl:  1rem;      /* 16px */
  --radius-full:9999px;

  /* Elevation shadows */
  --shadow-0: none;
  --shadow-1: 0 1px 3px 0 rgb(0 0 0 / 0.10), 0 1px 2px -1px rgb(0 0 0 / 0.10);
  --shadow-2: 0 4px 6px -1px rgb(0 0 0 / 0.10), 0 2px 4px -2px rgb(0 0 0 / 0.10);
  --shadow-3: 0 10px 15px -3px rgb(0 0 0 / 0.10), 0 4px 6px -4px rgb(0 0 0 / 0.10);

  /* Animation */
  --duration-fast:   150ms;
  --duration-normal: 250ms;
  --ease-default:    cubic-bezier(0.4, 0, 0.2, 1);
}

/* =========================================================
   2. Reset / Base
   ========================================================= */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-brand-primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
a:focus-visible {
  outline: 2px solid var(--color-brand-primary-dark);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

img, svg {
  display: block;
}

/* =========================================================
   3. Utility Classes (Tailwind-compatible)
   ========================================================= */

/* --- Display & Layout --- */
.flex            { display: flex; }
.inline-flex     { display: inline-flex; }
.block           { display: block; }
.hidden          { display: none; }
.flex-col        { flex-direction: column; }
.flex-row        { flex-direction: row; }
.items-center    { align-items: center; }
.items-start     { align-items: flex-start; }
.justify-center  { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-shrink-0   { flex-shrink: 0; }
.gap-1           { gap: 0.25rem; }
.gap-2           { gap: 0.5rem; }
.gap-3           { gap: 0.75rem; }
.gap-4           { gap: 1rem; }
.gap-6           { gap: 1.5rem; }
.gap-8           { gap: 2rem; }

/* --- Sizing --- */
.h-full          { height: 100%; }
.min-h-screen    { min-height: 100vh; }
.w-full          { width: 100%; }
.w-5             { width: 1.25rem; }
.w-8             { width: 2rem; }
.h-5             { height: 1.25rem; }
.h-8             { height: 2rem; }
.max-w-md        { max-width: 28rem; }   /* 448px — auth-card token */

/* --- Spacing --- */
.px-4  { padding-left: 1rem;    padding-right: 1rem; }
.px-5  { padding-left: 1.25rem; padding-right: 1.25rem; }
.px-6  { padding-left: 1.5rem;  padding-right: 1.5rem; }
.px-8  { padding-left: 2rem;    padding-right: 2rem; }
.py-2  { padding-top: 0.5rem;   padding-bottom: 0.5rem; }
.py-3  { padding-top: 0.75rem;  padding-bottom: 0.75rem; }
.py-4  { padding-top: 1rem;     padding-bottom: 1rem; }
.py-5  { padding-top: 1.25rem;  padding-bottom: 1.25rem; }
.py-8  { padding-top: 2rem;     padding-bottom: 2rem; }
.py-12 { padding-top: 3rem;     padding-bottom: 3rem; }
.pt-2  { padding-top: 0.5rem; }
.pt-4  { padding-top: 1rem; }
.pb-2  { padding-bottom: 0.5rem; }
.pb-4  { padding-bottom: 1rem; }
.mb-1  { margin-bottom: 0.25rem; }
.mb-2  { margin-bottom: 0.5rem; }
.mb-3  { margin-bottom: 0.75rem; }
.mb-4  { margin-bottom: 1rem; }
.mb-6  { margin-bottom: 1.5rem; }
.mt-1  { margin-top: 0.25rem; }
.mt-2  { margin-top: 0.5rem; }
.mt-3  { margin-top: 0.75rem; }
.mt-4  { margin-top: 1rem; }
.mt-6  { margin-top: 1.5rem; }
.mt-8  { margin-top: 2rem; }
.space-y-1 > * + * { margin-top: 0.25rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }
.space-y-4 > * + * { margin-top: 1rem; }
.space-y-6 > * + * { margin-top: 1.5rem; }

/* --- Colors — Background --- */
.bg-page          { background-color: var(--color-page); }
.bg-card          { background-color: var(--color-card); }
.bg-brand-deep    { background-color: var(--color-brand-deep); }
.bg-brand-primary { background-color: var(--color-brand-primary); }
.bg-danger-bg     { background-color: var(--color-danger-bg); }
.bg-success-bg    { background-color: var(--color-success-bg); }
.bg-warning-bg    { background-color: var(--color-warning-bg); }

/* --- Colors — Text --- */
.text-primary   { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-inverse   { color: var(--color-text-inverse); }
.text-on-brand  { color: var(--color-text-on-brand); }
.text-danger    { color: var(--color-danger); }
.text-success   { color: var(--color-success); }
.text-warning   { color: var(--color-warning); }
.text-white     { color: #FFFFFF; }

/* --- Typography --- */
.font-sans     { font-family: var(--font-sans); }
.font-mono     { font-family: var(--font-mono); }
.text-xs       { font-size: 0.75rem;  line-height: 1rem; }
.text-sm       { font-size: 0.875rem; line-height: 1.25rem; }
.text-base     { font-size: 1rem;     line-height: 1.5rem; }
.text-lg       { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl       { font-size: 1.25rem;  line-height: 1.75rem; }
.text-2xl      { font-size: 1.5rem;   line-height: 2rem; }
.text-3xl      { font-size: 1.875rem; line-height: 2.25rem; }
.font-normal   { font-weight: 400; }
.font-medium   { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }
.text-center   { text-align: center; }
.text-left     { text-align: left; }
.tracking-wide { letter-spacing: 0.025em; }
.antialiased   { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
.leading-none  { line-height: 1; }
.leading-tight { line-height: 1.25; }
.leading-normal{ line-height: 1.5; }

/* --- Border & Radius --- */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }
.rounded-t-lg { border-top-left-radius: var(--radius-lg); border-top-right-radius: var(--radius-lg); }
.rounded-b-lg { border-bottom-left-radius: var(--radius-lg); border-bottom-right-radius: var(--radius-lg); }
.border           { border: 1px solid var(--color-border); }
.border-danger    { border-color: var(--color-danger-border); }
.border-0         { border: 0; }

/* --- Shadow / Elevation --- */
.shadow-elevation-0 { box-shadow: var(--shadow-0); }
.shadow-elevation-1 { box-shadow: var(--shadow-1); }
.shadow-elevation-2 { box-shadow: var(--shadow-2); }
.shadow-elevation-3 { box-shadow: var(--shadow-3); }

/* --- Misc --- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.overflow-hidden { overflow: hidden; }
.relative        { position: relative; }
.absolute        { position: absolute; }
.inset-0         { inset: 0; }
.z-10            { z-index: 10; }
.cursor-pointer  { cursor: pointer; }
.select-none     { user-select: none; }
.opacity-50      { opacity: 0.5; }
.transition      { transition-property: color, background-color, border-color, box-shadow; transition-duration: var(--duration-fast); transition-timing-function: var(--ease-default); }

/* =========================================================
   4. Component Classes
   ========================================================= */

/* --- Auth Layout (login / activation / forgot / consent / MFA) --- */
.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1rem;
  background:
    radial-gradient(1100px 520px at 50% -8%, rgba(37, 99, 235, 0.10), transparent 60%),
    linear-gradient(165deg, var(--color-page) 0%, var(--color-page-2) 100%);
}

.auth-shell {
  width: 100%;
  max-width: 25rem;   /* 400px — gọn, dễ đọc */
}

.auth-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  margin-bottom: 1.5rem;
}

.auth-brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
  box-shadow: 0 4px 12px -3px rgb(37 99 235 / 0.5);
}

.auth-brand-name {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--color-text-primary);
}

.auth-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-3);
  padding: 2rem 1.75rem;
}
@media (min-width: 480px) {
  .auth-card { padding: 2.25rem 2rem; }
}

.auth-title {
  font-size: 1.375rem;
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem;
}

.auth-info {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding: 0.75rem 0.875rem;
  margin-bottom: 1.25rem;
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-md);
  background-color: var(--color-page);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.auth-foot {
  margin-top: 1.5rem;
  text-align: center;
}

.auth-link {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}
.auth-link:hover {
  color: var(--color-brand-primary);
  text-decoration: underline;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.25rem;
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default),
              transform var(--duration-fast) var(--ease-default);
  text-decoration: none;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.35);
}

.btn:active { transform: translateY(1px); }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background-color: var(--color-brand-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 1px 2px rgb(15 23 42 / 0.08);
}
.btn-primary:hover {
  background-color: var(--color-brand-primary-dark);
}

.btn-danger {
  background-color: var(--color-danger-btn);
  color: var(--color-text-inverse);
}
.btn-danger:hover {
  background-color: #b91c1c; /* red-700 */
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-brand-primary);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover {
  background-color: var(--color-page);
}

.btn-full {
  width: 100%;
}

/* --- Form Fields --- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.form-label-required::after {
  content: ' *';
  color: var(--color-danger);
}

.form-input {
  width: 100%;
  background-color: var(--color-input-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.6875rem 0.875rem;
  font-size: 0.9375rem;
  line-height: 1.5rem;
  color: var(--color-text-primary);
  transition: border-color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
}

.form-input::placeholder {
  color: var(--color-text-placeholder);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgb(37 99 235 / 0.18);
}

/* Chống Chrome autofill ghi đè nền/chữ (giữ tương phản đúng theme) */
.form-input:-webkit-autofill,
.form-input:-webkit-autofill:hover,
.form-input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--color-text-primary);
  -webkit-box-shadow: 0 0 0 1000px var(--color-input-bg) inset;
  caret-color: var(--color-text-primary);
  transition: background-color 9999s ease-in-out 0s;
}

.form-input-error {
  border-color: var(--color-danger-border);
}
.form-input-error:focus {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgb(185 28 28 / 0.12);
}

.form-error {
  font-size: 0.875rem;
  color: var(--color-danger);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.form-hint {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

/* --- Alert Banners --- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 0.75rem 0.875rem;
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: 0.875rem;
  line-height: 1.3;
}
.alert svg {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  margin-top: 0.0625rem;
}

.alert-error {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

.alert-success {
  background-color: var(--color-success-bg);
  border-color: #bbf7d0; /* green-200 */
  color: var(--color-success);
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border-color: #fde68a; /* amber-200 */
  color: var(--color-warning);
}

/* --- Divider --- */
.divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}
.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--color-border);
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1rem;
}

.badge-primary {
  background-color: #dbeafe; /* blue-100 */
  color: #1d4ed8; /* blue-700 */
}

.badge-success {
  background-color: #dcfce7; /* green-100 */
  color: #15803d; /* green-700 */
}

.badge-danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
}

/* --- Responsive --- */
@media (max-width: 479px) {
  .auth-page { padding: 1.5rem 1rem; }
}

/* =========================================================
   4b. Admin Layout (sidebar + topbar + table + badge + flash)
   ========================================================= */

/* Admin shell: full viewport, flex row */
.admin-shell {
  display: flex;
  min-height: 100vh;
  background-color: var(--color-page);
  color: var(--color-text-primary);
}

/* Sidebar */
.admin-sidebar {
  width: 15rem;       /* 240px */
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  background-color: var(--color-brand-deep);
  color: var(--color-text-on-brand);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.admin-sidebar-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 1.25rem 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.admin-sidebar-icon {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
}

.admin-sidebar-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.01em;
  line-height: 1.2;
}

/* Nav */
.admin-nav {
  flex: 1;
  padding: 0.75rem 0;
  list-style: none;
}

.admin-nav-item {
  margin: 0.125rem 0.5rem;
}

.admin-nav-link {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.5625rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255,255,255,0.72);
  text-decoration: none;
  transition: background-color var(--duration-fast) var(--ease-default),
              color var(--duration-fast) var(--ease-default);
}

.admin-nav-link:hover {
  background-color: rgba(255,255,255,0.08);
  color: #fff;
  text-decoration: none;
}

.admin-nav-link:focus-visible {
  outline: 2px solid var(--color-brand-primary-light);
  outline-offset: 2px;
}

.admin-nav-link.active {
  background-color: rgba(255,255,255,0.12);
  color: #fff;
  font-weight: 600;
}

.admin-nav-icon {
  width: 1.125rem;
  height: 1.125rem;
  flex-shrink: 0;
  opacity: 0.8;
}

.admin-nav-link.active .admin-nav-icon {
  opacity: 1;
}

/* Sidebar footer: logout */
.admin-sidebar-footer {
  padding: 0.75rem 0.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

/* Main area */
.admin-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Topbar */
.admin-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 3.5rem;
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.admin-topbar-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

/* Page content */
.admin-main {
  flex: 1;
  padding: 1.5rem;
  max-width: 64rem;   /* layout.max-width.content */
  width: 100%;
}

/* Flash messages */
.admin-flash {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.admin-flash-success {
  background-color: var(--color-success-bg);
  border-color: #bbf7d0;
  color: var(--color-success);
}

.admin-flash-error {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

/* Page header row */
.admin-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.admin-page-title {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.3;
}

/* Stat cards (dashboard) */
.admin-stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(11rem, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.admin-stat-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-1);
}

.admin-stat-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-bottom: 0.25rem;
}

.admin-stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.2;
}

.admin-stat-sub {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* Table */
.admin-table-wrap {
  background-color: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.admin-table thead {
  background-color: var(--color-page);
  border-bottom: 1px solid var(--color-border);
}

.admin-table th {
  padding: 0.625rem 0.875rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.admin-table td {
  padding: 0.625rem 0.875rem;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  vertical-align: middle;
}

.admin-table tbody tr:last-child td {
  border-bottom: 0;
}

.admin-table tbody tr:hover td {
  background-color: var(--color-page);
}

/* Button group inside table cells */
.btn-group {
  display: inline-flex;
  gap: 0.375rem;
  flex-wrap: wrap;
}

/* Smaller button variant for table actions */
.btn-sm {
  padding: 0.3125rem 0.625rem;
  font-size: 0.8125rem;
  line-height: 1rem;
}

/* Success button variant */
.btn-success {
  background-color: var(--color-success-btn);
  color: var(--color-text-inverse);
}
.btn-success:hover {
  background-color: var(--color-success);
}

/* Secondary button (neutral, for edit) */
.btn-secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  background-color: var(--color-page);
}

/* Warning button */
.btn-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid #fde68a;
}
.btn-warning:hover {
  background-color: #fef3c7;
}

/* Badge variants */
.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-secondary {
  background-color: var(--color-page);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

/* Filter bar */
.admin-filter-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem;
}

.admin-search-input {
  flex: 1;
  min-width: 12rem;
  max-width: 24rem;
}

/* Form section card (user/client create/edit) */
.admin-form-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-1);
  margin-bottom: 1.25rem;
}

.admin-form-card-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.625rem;
  border-bottom: 1px solid var(--color-border);
}

.admin-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

@media (max-width: 640px) {
  .admin-form-grid { grid-template-columns: 1fr; }
}

.admin-form-full {
  grid-column: 1 / -1;
}

.admin-form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
  flex-wrap: wrap;
}

/* Pagination / cursor */
.admin-pagination {
  display: flex;
  justify-content: flex-end;
  margin-top: 1rem;
}

/* Secret box (client create) */
.admin-secret-box {
  background-color: var(--color-page);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  word-break: break-all;
  color: var(--color-text-primary);
  margin-top: 0.5rem;
}

/* Responsive: hide sidebar on small screen */
@media (max-width: 767px) {
  .admin-sidebar {
    display: none;
  }
  .admin-main {
    padding: 1rem;
  }
}

/* =========================================================
   5. Dark Mode (nhất quán: card tối, input tối, chữ sáng — tương phản tốt)
   ========================================================= */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;

    --color-page:               #0B1220;
    --color-page-2:             #131D33;
    --color-card:               #161F33;
    --color-card-border:        #28344B;
    --color-input-bg:           #0F1829;
    --color-border:             #33415A;
    --color-border-focus:       #3B82F6;
    --color-text-primary:       #E7EDF5;
    --color-text-secondary:     #94A3B8;
    --color-text-placeholder:   #5A6B85;

    --color-danger:             #FCA5A5;
    --color-danger-bg:          #3A1417;
    --color-danger-border:      #5B1D22;

    /* Bóng đậm hơn để card nổi trên nền tối */
    --shadow-3: 0 18px 40px -12px rgb(0 0 0 / 0.6), 0 6px 14px -8px rgb(0 0 0 / 0.5);
  }
}

/* --- Language switcher --- */
.lang-switcher { display: inline-flex; align-items: center; gap: 0.35rem; }
.lang-link {
  font-size: 0.8125rem; font-weight: 600; color: var(--color-text-secondary);
  padding: 0.1rem 0.4rem; border-radius: var(--radius-sm); text-decoration: none;
}
.lang-link:hover { color: var(--color-brand-primary); text-decoration: none; }
.lang-link-active { color: var(--color-brand-primary); background: rgba(37,99,235,0.10); }
.lang-sep { color: var(--color-text-placeholder); font-size: 0.8125rem; }
.admin-topbar { display: flex; align-items: center; justify-content: space-between; }

/* --- Account portal + Home --- */
.account-portal { max-width: 40rem; margin: 0 auto; padding: 2rem 1rem 3rem; }
.account-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1rem; }
.account-brand { display: inline-flex; align-items: center; gap: 0.5rem; }
.account-title { font-size: 1.5rem; font-weight: 600; color: var(--color-text-primary); margin-bottom: 1.5rem; }
.account-section {
  background: var(--color-card); border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-1);
  padding: 1.5rem; margin-bottom: 1.25rem;
}
.account-section-title {
  font-size: 1.05rem; font-weight: 600; color: var(--color-text-primary);
  margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--color-card-border);
}
.account-info-list { display: flex; flex-direction: column; gap: 0; }
.account-info-row {
  display: flex; justify-content: space-between; gap: 1rem;
  padding: 0.6rem 0; border-bottom: 1px solid var(--color-card-border);
}
.account-info-row:last-child { border-bottom: 0; }
.account-info-row dt { color: var(--color-text-secondary); font-size: 0.875rem; }
.account-info-row dd { color: var(--color-text-primary); font-weight: 500; }
.account-mfa-status { font-size: 0.9rem; color: var(--color-text-secondary); margin-bottom: 1rem; }
.account-mfa-on { color: var(--color-success); font-weight: 600; }

/* Ảnh đại diện */
.avatar-manage { display: flex; align-items: flex-start; gap: 1.25rem; flex-wrap: wrap; }
.avatar-preview { flex-shrink: 0; }
.avatar-img, .avatar-placeholder {
  width: 96px; height: 96px; border-radius: var(--radius-full);
  border: 1px solid var(--color-card-border); object-fit: cover; display: block;
}
.avatar-placeholder {
  display: flex; align-items: center; justify-content: center;
  background: var(--color-page-2); color: var(--color-brand-primary);
  font-size: 2.25rem; font-weight: 600; line-height: 1; user-select: none;
}
.avatar-actions { display: flex; flex-direction: column; gap: 0.75rem; flex: 1 1 14rem; }
.avatar-upload-form { display: flex; flex-direction: column; gap: 0.5rem; align-items: flex-start; }
.avatar-upload-form .form-input[type="file"] { padding: 0.4rem; font-size: 0.875rem; }

.home-greeting { color: var(--color-text-secondary); margin-bottom: 1.25rem; }
.home-actions { display: flex; flex-direction: column; gap: 0.75rem; }

/* --- Sticky footer cho Layout (tách footer khỏi nội dung) --- */
.site-body { min-height: 100vh; display: flex; flex-direction: column; }
.site-main { flex: 1 0 auto; }
.site-footer { flex-shrink: 0; margin-top: 2.5rem; padding: 1.5rem 1rem; border-top: 1px solid var(--color-card-border); }

/* --- Header actions (home + logout/lang) --- */
.account-header-actions { display: inline-flex; align-items: center; gap: 0.5rem; }
.admin-topbar-actions { display: inline-flex; align-items: center; gap: 0.75rem; }