@import url(./variable.css);
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  width: 100%;
  min-height: 100vh;

  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;

  line-height: 1.5;

  color: var(--color-text-primary);
  background: var(--color-bg-body);

  transition:
    background-color var(--transition-normal),
    color var(--transition-normal);
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
}

a {
  color: inherit;
  text-decoration: none;
}
/*=======================================
               SIDEBAR
=======================================*/
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  background: linear-gradient(180deg, #347fb7 0%, #2f80b7 55%, #2c78ac 100%);
  color: var(--sidebar-text);
  z-index: var(--z-sidebar);
  transition:
    width var(--transition-slow),
    transform var(--transition-slow),
    box-shadow var(--transition-slow);
}

.logo-wrapper {
  width: 100%;
  height: 95px;
  display: flex;
  align-items: center;
  padding: 0 22px;
  box-sizing: border-box;
}
.school-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  color: inherit;
  text-decoration: none;
  user-select: none;
}
.logo-mark {
  position: relative;
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, #5aa9d6, #347fb7);
  box-shadow: 0 8px 20px rgba(24, 79, 117, 0.25);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  border-radius: 13px;
  color: #ffffff;
  overflow: hidden;
}

.logo-mark::before {
  content: "";
  position: absolute;
  width: 42px;
  height: 42px;
  top: -23px;
  right: -20px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
}

.logo-mark span {
  position: absolute;
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -1px;
  color: #ffffff;
}

.logo-mark span:first-child {
  transform: translate(-5px, -3px);
}

.logo-mark span:last-child {
  transform: translate(5px, 4px);
}
.school-logo:hover .logo-mark {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(24, 79, 117, 0.32);
}

.logo-text {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
}

.logo-text-top {
  display: block;
  color: var(--color-white);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.1;
  letter-spacing: 0.35px;
  white-space: nowrap;
}

.logo-text-bottom {
  display: block;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 650;
  line-height: 1;
  letter-spacing: 2.8px;
  white-space: nowrap;
}

/* =========================================
   MENU TITLE
========================================= */

.menu-title {
  width: calc(100% - 40px);
  margin: 4px 20px 10px;
  padding: 10px 10px 9px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--sidebar-text);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition:
    width var(--transition-normal),
    margin var(--transition-normal),
    padding var(--transition-normal),
    opacity var(--transition-fast);
}

.menu-title span {
  display: block;
  max-width: 200px;
  color: inherit;
  white-space: nowrap;
  overflow: hidden;
  line-height: 1.2;
  transition:
    max-width var(--transition-normal),
    opacity var(--transition-fast);
}
/* ========================================
   SIDEBAR MENU
======================================== */

.sidebar-menu {
  position: relative;
  list-style: none;
  flex: 1;
  padding: 10px 0;
}

/* ========================================
   MENU ITEM
======================================== */

.sidebar-menu li {
  position: relative;
  width: 90%;
  margin: 0 auto 5px;
  border-radius: var(--radius);
  z-index: 2;
}

/* ========================================
   MENU LINK
======================================== */

.sidebar-menu > li > a {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 52px;
  margin-left: 20px;
  padding: 13px 15px 13px 20px;
  gap: 15px;
  color: var(--sidebar-text);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  border-radius: var(--radius);
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal),
    transform var(--transition-normal);
}

/* ========================================
   ICON
======================================== */

.sidebar-menu > li > a i {
  flex: 0 0 20px;
  width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  color: var(--sidebar-text);
  transition:
    color var(--transition-normal),
    transform var(--transition-normal);
}

/* ========================================
   TEXT
======================================== */

.sidebar-menu li a span {
  display: inline-block;
  max-width: 200px;
  overflow: hidden;
  white-space: nowrap;
  opacity: 1;
  color: var(--sidebar-text);
  transition:
    opacity var(--transition-normal),
    max-width var(--transition-normal),
    color var(--transition-normal);
}

/* =========================================
   ACTIVE LINK
========================================= */

.sidebar-menu > li.side-active > a {
  position: relative;

  margin-left: 20px;

  color: var(--sidebar-text-active);
  background: transparent;

  border-radius: var(--radius) 0 0 var(--radius);

  box-shadow: none;

  z-index: 3;

  transition:
    color var(--transition-normal),
    transform var(--transition-normal);
}

.sidebar-menu > li.side-active > a i,
.sidebar-menu > li.side-active > a span {
  color: var(--sidebar-text-active);
}

/* =========================================
   ACTIVE BACKGROUND
========================================= */

.sidebar-active-indicator {
  position: absolute;

  left: 10px;
  right: 0;

  height: 52px;

  background: var(--sidebar-active-bg);

  border-radius: var(--radius) 0 0 var(--radius);

  box-shadow: var(--shadow-xs);

  pointer-events: none;

  z-index: 1;

  transform: translateY(0);

  transition:
    top var(--transition-normal),
    height var(--transition-normal);
}

/* =========================================
   ACTIVE CONCAVE TOP
========================================= */

.sidebar-active-indicator::before {
  content: "";
  position: absolute;
  top: calc(var(--radius) * -1);
  right: 0;
  width: var(--radius);
  height: var(--radius);
  background: transparent;
  border-bottom-right-radius: var(--radius);
  box-shadow: 15px 15px 0 15px var(--sidebar-active-bg);
  pointer-events: none;
}

/* =========================================
   ACTIVE CONCAVE BOTTOM
========================================= */

.sidebar-active-indicator::after {
  content: "";
  position: absolute;
  bottom: calc(var(--radius) * -1);
  right: 0;
  width: var(--radius);
  height: var(--radius);
  background: transparent;
  border-top-right-radius: var(--radius);
  box-shadow: 15px -15px 0 15px var(--sidebar-active-bg);
  pointer-events: none;
}

/* ========================================
   HOVER ITEM
======================================== */

.sidebar-menu li:not(.side-active):hover > a {
  background: var(--sidebar-hover);
  color: var(--color-text-white);
  border-radius: var(--radius);
  transform: translateX(2px);
}

.sidebar-menu li:not(.side-active):hover > a i {
  color: var(--color-text-white);
  transform: scale(1.05);
}

.sidebar-menu li:not(.side-active):hover > a span {
  color: var(--color-text-white);
}

/* ========================================
   HOVER - THANH NHỎ BÊN TRÁI
======================================== */

.sidebar-menu li:not(.side-active)::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 50%;
  width: 4px;
  height: 0;
  background: var(--color-white);
  border-radius: var(--radius);
  transform: translateY(-50%);
  opacity: 0;
  transition:
    height var(--transition-normal),
    opacity var(--transition-normal);
}

.sidebar-menu li:not(.side-active):hover::before {
  height: 28px;
  opacity: 0.9;
}
/*=======================================
               LAYOUT
=======================================*/
.layout {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-left: var(--sidebar-width);
  background: var(--color-bg-body);
  transition: padding-left var(--transition-slow);
  overflow-x: hidden;
}

/* =================================
   HEADER
================================= */
.header {
  position: fixed;
  top: 0;
  right: 0;
  left: var(--sidebar-width);
  height: var(--header-height);
  padding: 0 28px;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--header-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: var(--z-header);
  transition:
    left var(--transition-slow),
    background-color var(--transition-normal),
    border-color var(--transition-normal);
}
/* =================================
   HEADER START
================================= */
.header-start,
.header-end {
  flex: 1;
  display: flex;
  align-items: center;
  min-width: 0;
}
.header-start {
  justify-content: flex-start;
}
.header-end {
  justify-content: flex-end;
}
/* =================================
   LOGO
================================= */

.header-logo {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 0 25px;
}
.header-logo img {
  width: 150px;
  height: auto;
  display: block;
  object-fit: contain;
}
/* =================================
   MENU TOGGLE
================================= */

.menu-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);
}

.menu-toggle:hover {
  background: var(--color-primary-light);
  border-color: rgba(59, 130, 196, 0.12);
  color: var(--color-primary);
}

.menu-toggle:active {
  transform: scale(0.94);
}

/* =================================
   ICON
================================= */

.menu-toggle img {
  width: 21px;
  height: 21px;
  object-fit: contain;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast);
}

/* =================================
   DESKTOP
================================= */

.collapse-icon {
  display: block;
}

.expand-icon {
  display: none;
}

.menu-toggle.is-collapsed .collapse-icon {
  display: none;
}

.menu-toggle.is-collapsed .expand-icon {
  display: block;
}

/* =================================
   MOBILE
================================= */

.navbar-mobile-icon {
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 21px;
  color: inherit;
}

.menu-toggle.is-mobile .collapse-icon,
.menu-toggle.is-mobile .expand-icon {
  display: none;
}

.menu-toggle.is-mobile .navbar-mobile-icon {
  display: flex;
}

/* =================================
   FOCUS
================================= */

.menu-toggle:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}
/* =================================
   USER PROFILE
================================= */

.user-profile {
  height: 50px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 10px 4px 5px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
}

.user-profile:hover {
  background: var(--color-bg-soft);
  border-color: rgba(59, 130, 196, 0.28);
  box-shadow: var(--shadow-xs);
}

.user-profile:active {
  transform: scale(0.98);
}

/* =================================
   AVATAR
================================= */

.user-avatar {
  width: 40px;
  height: 40px;
  flex: 0 0 40px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--color-primary-light);
  border: 1px solid rgba(59, 130, 196, 0.16);
}

.user-avatar img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

/* =================================
   USER INFO
================================= */

.user-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.user-name {
  max-width: 160px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 12px;
  font-weight: 400;
  color: var(--color-text-secondary);
  white-space: nowrap;
}

/* =================================
   ARROW
================================= */

.user-arrow {
  flex: 0 0 auto;
  margin-left: 4px;
  font-size: 12px;
  color: var(--color-text-muted);
  transition:
    transform var(--transition-fast),
    color var(--transition-fast);
}

.user-profile:hover .user-arrow {
  color: var(--color-primary);
}

.user-profile-wrapper.active .user-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}

/* =================================
   DROPDOWN
================================= */

.user-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 270px;
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px) scale(0.98);
  transform-origin: top right;
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast),
    visibility var(--transition-fast);
}

.user-profile-wrapper.active .user-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

/* =================================
   DROPDOWN HEADER
================================= */

.user-dropdown-header {
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-bg-soft);
  border-bottom: 1px solid var(--color-border-light);
}

.user-dropdown-avatar {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--color-primary-light);
  border: 1px solid rgba(59, 130, 196, 0.14);
}

.user-dropdown-info {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.user-dropdown-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-dropdown-email {
  font-size: 12px;
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* =================================
   DROPDOWN MENU
================================= */

.user-dropdown-menu {
  padding: 8px;
  background: var(--color-white);
}

.user-dropdown-item {
  min-height: 44px;
  padding: 9px 10px;
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: 14px;
  border-radius: var(--radius-sm);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.user-dropdown-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* =================================
   DROPDOWN ICON
================================= */

.dropdown-icon {
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  background: var(--color-bg-soft);
  color: var(--color-text-secondary);
  font-size: 15px;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast);
}

.user-dropdown-item:hover .dropdown-icon {
  background: var(--color-white);
  color: var(--color-primary);
}

/* =================================
   DIVIDER
================================= */

.user-dropdown-divider {
  height: 1px;
  margin: 7px 4px;
  background: var(--color-border-light);
}

/* =================================
   LOGOUT
================================= */

.user-dropdown-item.logout {
  color: var(--color-danger);
}

.user-dropdown-item.logout .dropdown-icon {
  color: var(--color-danger);
  background: var(--color-danger-bg);
}

.user-dropdown-item.logout:hover {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.user-dropdown-item.logout:hover .dropdown-icon {
  background: var(--color-white);
  color: var(--color-danger);
}
/* =========================================
   SIDEBAR COLLAPSED
========================================= */

/* =========================================
   LAYOUT
========================================= */

.sidebar.collapsed ~ .layout {
  padding-left: var(--sidebar-collapsed-width);
}

.sidebar.collapsed ~ .layout .header {
  left: var(--sidebar-collapsed-width);
}

/* =========================================
   MENU TOGGLE ICON
========================================= */

.sidebar.collapsed ~ .layout .collapse-icon {
  opacity: 0;

  transform: translateX(-12px);

  pointer-events: none;
}

.sidebar.collapsed ~ .layout .expand-icon {
  opacity: 1;

  transform: translateX(0);

  pointer-events: auto;
}

/* =========================================
   SIDEBAR
========================================= */

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

/* =========================================
   LOGO
========================================= */

.sidebar.collapsed .logo-wrapper {
  width: 100%;

  height: 95px;

  padding: 0;

  display: flex;
  align-items: center;
  justify-content: center;

  overflow: hidden;
}
.sidebar.collapsed .school-logo {
  width: auto;

  display: flex;

  justify-content: center;
}

.sidebar.collapsed .logo-mark {
  width: 48px;
  height: 48px;

  flex: 0 0 48px;

  border-radius: var(--radius-md);

  transition:
    width var(--transition-normal),
    height var(--transition-normal),
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
}

.sidebar.collapsed .logo-text {
  display: none;
}

/* =========================================
   MENU TITLE
========================================= */

.sidebar.collapsed .menu-title {
  display: none;
}

.sidebar.collapsed .menu-title span {
  opacity: 0;

  max-width: 0;

  overflow: hidden;
}

/* =========================================
   SIDEBAR MENU
========================================= */

.sidebar.collapsed .sidebar-menu {
  padding: 10px 0 0 8px;
}

/* =========================================
   MENU ICON
========================================= */

.sidebar.collapsed .sidebar-menu li a i {
  margin-right: 0;
  font-size: 20px;
  flex: 0 0 auto;
  transition:
    color var(--transition-fast),
    transform var(--transition-fast);
}

/* =========================================
   ALL MENU ITEM
========================================= */

.sidebar.collapsed .sidebar-menu li {
  width: 100%;
  padding: 0;
  margin: 0 0 6px;
  border-radius: var(--radius);
  justify-content: center;
}

/* =========================================
   MENU LINK
========================================= */

.sidebar.collapsed .sidebar-menu li > a {
  width: 52px;
  height: 52px;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  border-radius: var(--radius-md);
  font-size: 18px;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

/* =========================================
   HIDE TEXT
========================================= */

.sidebar.collapsed .sidebar-menu li a span {
  display: none;
  opacity: 0;
  max-width: 0;
  overflow: hidden;
}
/* =========================================
   ACTIVE ITEM
========================================= */

.sidebar.collapsed .sidebar-menu li.side-active {
    position: relative;
    width: 100%;
    display: block;
    z-index: 3;
}

.sidebar.collapsed .sidebar-menu li.side-active > a {
    position: relative;

    width: 100%;
    height: 52px;

    margin: 0;
    padding: 0;

    display: flex;
    align-items: center;
    justify-content: center;

    gap: 0;

    background: transparent;
    color: var(--sidebar-text-active);

    border-radius: 0;

    box-shadow: none;

    z-index: 4;

    transition:
        color var(--transition-normal);
}

/* =========================================
   ACTIVE ICON
========================================= */

.sidebar.collapsed .sidebar-menu li.side-active > a > i {
    position: relative;

    width: 22px;
    height: 22px;

    flex: 0 0 22px;

    display: flex;
    align-items: center;
    justify-content: center;

    margin: 0;
    padding: 0;

    font-size: 20px;
    line-height: 1;

    color: var(--sidebar-text-active);

    z-index: 5;

    transition:
        color var(--transition-normal),
        transform var(--transition-normal);
}
/* =========================================
   COLLAPSED ACTIVE INDICATOR
========================================= */

.sidebar.collapsed .sidebar-active-indicator {
    left: 8px;
    right: 0;

    width: auto;
    height: 52px;

    border-radius: var(--radius) 0 0 var(--radius);

    transition:
        top var(--transition-normal),
        left var(--transition-normal),
        width var(--transition-normal);
}
.sidebar.collapsed .sidebar-active-indicator::before {
    top: calc(var(--radius) * -1);
    right: 0;

    width: var(--radius);
    height: var(--radius);
}

.sidebar.collapsed .sidebar-active-indicator::after {
    bottom: calc(var(--radius) * -1);
    right: 0;

    width: var(--radius);
    height: var(--radius);
}
/* =========================================
   NORMAL ITEM
========================================= */

.sidebar.collapsed .sidebar-menu li:not(.side-active) > a {
  width: 52px;
  height: 52px;
  margin: 0 auto;
  padding: 0;
  justify-content: center;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--sidebar-text);
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

/* =========================================
   NORMAL ICON
========================================= */

.sidebar.collapsed .sidebar-menu li:not(.side-active) > a i {
  color: var(--sidebar-text);
  transition:
    color var(--transition-fast),
    transform var(--transition-fast);
}

/* =========================================
   HOVER
========================================= */

.sidebar.collapsed .sidebar-menu li:not(.side-active):hover > a {
  border-radius: 50%;
  background: var(--sidebar-hover);
  color: var(--color-white);
  transform: translateY(-1px);
}

.sidebar.collapsed .sidebar-menu li:not(.side-active):hover > a i {
  color: var(--color-white);
  transform: scale(1.05);
}

/* =========================================
   HIDE HOVER INDICATOR
========================================= */

.sidebar.collapsed .sidebar-menu li:not(.side-active)::before {
  display: none;
  height: 0;
}

.sidebar.collapsed .sidebar-menu li:not(.side-active):hover::before {
  display: none;
  height: 0;
}

/* =========================================
   ACTIVE HOVER
========================================= */

.sidebar.collapsed .sidebar-menu li.side-active:hover > a {
  background: var(--sidebar-active-bg);
  color: var(--sidebar-text-active);
  transform: none;
}

/* =========================================
   SMOOTH SIDEBAR TRANSITION
========================================= */

.sidebar {
  transition:
    width var(--transition-slow),
    background-color var(--transition-normal);
}

.layout {
  transition: padding-left var(--transition-slow);
}

.header {
  transition: left var(--transition-slow);
}

/* =========================================
   LOGO TRANSITION
========================================= */

.logo-wrapper,
.school-logo,
.logo-mark,
.logo-text {
  transition:
    width var(--transition-normal),
    opacity var(--transition-normal),
    transform var(--transition-normal);
}
/*=======================================
             CONTENT WRAPPER
=======================================*/
.content-wrapper {
  position: relative;
  flex: 1;
  width: 100%;
  min-height: 100vh;
  padding: calc(var(--header-height) + 20px) 30px 30px;
  overflow: visible;
  z-index: 1;
}