/* =========================================================
   AI Hub — Professional Main Stylesheet
   File: student/css/style.css
   ========================================================= */

/* 1. Theme variables */

:root {
  color-scheme: light;

  --bg: #F5F7FB;
  --surface: #FFFFFF;
  --surface-soft: #F0F4FA;
  --surface-hover: #E8EEF8;

  --text: #172033;
  --text-muted: #69758B;
  --text-soft: #8994A8;

  --primary: #0052FF;
  --primary-hover: #0043D6;
  --primary-soft: #EAF0FF;
  --primary-border: #C8D7FF;

  --border: #E2E8F0;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --violet: #7C3AED;

  --sidebar-width: 264px;
  --sidebar-collapsed-width: 82px;
  --header-height: 74px;

  --radius-sm: 9px;
  --radius-md: 13px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 8px rgb(15 23 42 / 4%);
  --shadow-md: 0 8px 24px rgb(15 23 42 / 7%);
  --shadow-lg: 0 18px 45px rgb(15 23 42 / 10%);

  --transition: 220ms ease;
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --bg: #0B1020;
  --surface: #131B2E;
  --surface-soft: #192339;
  --surface-hover: #202D47;

  --text: #EDF2FF;
  --text-muted: #A1AEC5;
  --text-soft: #7888A4;

  --primary: #7AA2FF;
  --primary-hover: #9AB8FF;
  --primary-soft: #1D2D50;
  --primary-border: #344B7D;

  --border: #28344B;
  --success: #34D399;
  --warning: #FBBF24;
  --danger: #F87171;
  --violet: #A78BFA;

  --shadow-sm: 0 2px 8px rgb(0 0 0 / 12%);
  --shadow-md: 0 8px 24px rgb(0 0 0 / 20%);
  --shadow-lg: 0 18px 45px rgb(0 0 0 / 28%);
}

/* 2. Reset and base */

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  min-width: min(320px, 100%);
  min-height: 100vh;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans Arabic", "Inter", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  transition:
    background-color var(--transition),
    color var(--transition);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  cursor: pointer;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  max-width: 100%;
}

img {
  display: block;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--primary);
  color: #FFFFFF;
}

:where(button, a, input, textarea, select) {
  touch-action: manipulation;
}

.skip-link {
  position: fixed;
  z-index: 300;
  inset-block-start: 10px;
  inset-inline-start: 10px;
  padding: 10px 15px;
  transform: translateY(-150%);
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #FFFFFF;
}

.skip-link:focus {
  transform: translateY(0);
}

/* 3. Shared utilities */

.text-accent {
  color: var(--primary);
}

.muted,
.text-muted {
  color: var(--text-muted);
}

.small {
  font-size: 12px;
}

.content-section {
  min-width: 0;
  margin-top: 30px;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 17px;
}

.section-heading > div {
  min-width: 0;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.3px;
}

.section-heading p {
  margin: 5px 0 0;
  color: var(--text-muted);
  font-size: 13px;
}

.section-kicker {
  display: inline-block;
  margin-bottom: 4px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  flex-shrink: 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition);
}

.text-link:hover {
  opacity: 0.75;
}

.text-link i,
.text-link svg {
  font-size: 15px;
}

/* Buttons */

.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  min-width: 42px;
  flex-shrink: 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text-muted);
  transition:
    background var(--transition),
    color var(--transition),
    border-color var(--transition),
    transform var(--transition);
}

.icon-button > i {
  font-size: 18px;
  line-height: 1;
}

.icon-button:hover {
  border-color: var(--primary-border);
  background: var(--primary-soft);
  color: var(--primary);
}

.icon-button:active {
  transform: scale(0.96);
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 45px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: var(--primary);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 700;
  transition:
    background var(--transition),
    box-shadow var(--transition),
    transform var(--transition);
}

.primary-button:hover {
  background: var(--primary-hover);
  box-shadow: 0 5px 15px rgb(0 82 255 / 18%);
}

.primary-button:active {
  transform: translateY(1px);
}

.primary-button > i {
  font-size: 16px;
}

/* 4. App shell and sidebar */

.app-shell {
  min-height: 100vh;
}

/*
  IMPORTANT:
  HTML uses .main-content, not .main-area.
  The sidebar and the main content share the same width variables.
*/

.sidebar {
  position: fixed;
  z-index: 120;
  inset-block: 0;
  inset-inline-start: 0;

  display: flex;
  flex-direction: column;

  width: var(--sidebar-width);
  height: 100vh;
  height: 100dvh;
  padding: 18px 13px 13px;

  overflow: hidden;

  border-inline-end: 1px solid var(--border);
  background: var(--surface);

  transition:
    width var(--transition),
    transform var(--transition),
    background-color var(--transition),
    border-color var(--transition);
}

/* Brand/header */

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 48px;
  padding: 0 3px;
  margin-bottom: 23px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
}

.brand-logo {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--surface-soft);
}

.brand-logo-image {
  display: block;
  width: 100%;
  height: 100%;

  object-fit: contain;
}

.brand-name {
  overflow: hidden;
  color: var(--text);
  font-family: "Inter", "IBM Plex Sans Arabic", sans-serif;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-overflow: ellipsis;
}

.sidebar-close {
  display: none;
  margin-inline-start: auto;
}

/* Scrollable navigation */

.sidebar-scroll {
  flex: 1;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-color: var(--border) transparent;
  scrollbar-width: thin;
}

.sidebar-scroll::-webkit-scrollbar {
  width: 5px;
}

.sidebar-scroll::-webkit-scrollbar-thumb {
  border-radius: 10px;
  background: var(--border);
}

.nav-group {
  margin-bottom: 22px;
}

.nav-heading {
  padding: 0 12px;
  margin: 0 0 8px;
  color: var(--text-soft);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.7;
  white-space: nowrap;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;

  min-width: 0;
  min-height: 45px;
  padding: 10px 12px;
  margin-bottom: 4px;

  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 12px;

  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;

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

.nav-link > i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  min-width: 22px;
  flex-shrink: 0;
  font-size: 19px;
  line-height: 1;
}

.nav-link > span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-link:hover {
  background: var(--surface-soft);
  color: var(--text);
}

.nav-link.active,
.nav-link[aria-current="page"] {
  border-color: var(--primary-border);
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
}

.nav-link.active::before,
.nav-link[aria-current="page"]::before {
  position: absolute;
  inset-block: 9px;
  inset-inline-start: 0;
  width: 3px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
  content: "";
}

/* Bottom navigation and collapse button */

.sidebar-bottom {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex-shrink: 0;
  padding-top: 12px;
  margin-top: 12px;
  border-top: 1px solid var(--border);
}

.sidebar-collapse {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;

  width: 100%;
  min-height: 43px;
  padding: 10px 12px;

  border: 1px solid transparent;
  border-radius: 12px;
  background: transparent;

  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  text-align: start;
  white-space: nowrap;

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

.sidebar-collapse > i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  min-width: 22px;
  flex-shrink: 0;
  font-size: 18px;
}

.sidebar-collapse > span {
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-collapse:hover {
  background: var(--surface-soft);
  color: var(--primary);
}

/* 5. Desktop collapsed sidebar */

@media (min-width: 769px) {
  body[data-sidebar-collapsed="true"] .sidebar {
    width: var(--sidebar-collapsed-width);
    padding-inline: 9px;
  }

  body[data-sidebar-collapsed="true"] .sidebar-header {
    justify-content: center;
    padding-inline: 0;
  }

  body[data-sidebar-collapsed="true"] .brand {
    justify-content: center;
    gap: 0;
    width: 100%;
  }

  body[data-sidebar-collapsed="true"] .brand-name,
  body[data-sidebar-collapsed="true"] .nav-heading,
  body[data-sidebar-collapsed="true"] .nav-link > span,
  body[data-sidebar-collapsed="true"] #collapseSidebar > span {
    display: none;
  }

  body[data-sidebar-collapsed="true"] .nav-link {
    justify-content: center;
    gap: 0;
    padding-inline: 0;
  }

  body[data-sidebar-collapsed="true"] .nav-link > i {
    width: 26px;
    min-width: 26px;
    font-size: 20px;
  }

  body[data-sidebar-collapsed="true"] .nav-link.active::before,
  body[data-sidebar-collapsed="true"] .nav-link[aria-current="page"]::before {
    inset-inline-start: 0;
  }

  body[data-sidebar-collapsed="true"] .sidebar-collapse {
    justify-content: center;
    gap: 0;
    padding-inline: 0;
  }

  body[data-sidebar-collapsed="true"] .sidebar-collapse > i {
    width: 26px;
    min-width: 26px;
  }
}

/* Overlay: used for the mobile drawer */

.sidebar-overlay {
  position: fixed;
  z-index: 110;
  inset: 0;

  background: rgb(6 12 28 / 48%);
  opacity: 0;
  visibility: hidden;

  transition:
    opacity var(--transition),
    visibility var(--transition);
}

body.sidebar-open .sidebar-overlay {
  opacity: 1;
  visibility: visible;
}

/* 6. Main content and topbar */

.main-content {
  min-width: 0;
  min-height: 100vh;
  margin-inline-start: var(--sidebar-width);

  transition:
    margin-inline-start var(--transition);
}

body[data-sidebar-collapsed="true"] .main-content {
  margin-inline-start: var(--sidebar-collapsed-width);
}

.topbar {
  position: sticky;
  z-index: 80;
  top: 0;

  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;

  min-height: var(--header-height);
  padding: 12px 28px;

  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.topbar-start,
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.topbar-start {
  flex: 1;
}

.desktop-menu {
  display: inline-flex;
}

.mobile-menu {
  display: none;
}

/* Search */

.global-search {
  display: flex;
  align-items: center;
  gap: 10px;

  width: min(430px, 100%);
  min-width: 0;
  min-height: 43px;
  padding: 0 13px;

  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text-muted);

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

.global-search:focus-within {
  border-color: var(--primary);
  background: var(--surface);
}

.global-search > i {
  flex-shrink: 0;
  font-size: 16px;
}

.global-search input {
  width: 100%;
  min-width: 0;
  padding: 7px 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text);
  font-size: 12px;
}

.global-search input:focus-visible {
  outline: none;
}

.global-search input::placeholder {
  color: var(--text-soft);
}

.global-search kbd {
  flex-shrink: 0;
  padding: 0 5px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--surface);
  color: var(--text-soft);
  font-size: 11px;
}

/* Language button: symbol only */

.language-switcher {
  font-family: "IBM Plex Sans Arabic", "Inter", sans-serif;
}

.language-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 24px;
  font-family: "IBM Plex Sans Arabic", "Inter", sans-serif;
  font-size: 19px;
  font-weight: 800;
  line-height: 1;
}

/* Theme button */

#themeToggle {
  font-size: 18px;
}

/* Profile button */

.profile-button {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 42px;
  padding: 4px 8px;
  border: 1px solid transparent;
  border-radius: 12px;
  color: var(--text);
  transition:
    background var(--transition),
    border-color var(--transition);
}

.profile-button:hover {
  border-color: var(--border);
  background: var(--surface-soft);
}

.avatar {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  min-width: 34px;
  border-radius: 11px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 18px;
}

.profile-button-text {
  max-width: 100px;
  overflow: hidden;
  color: var(--text-muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-button > i:last-child {
  color: var(--text-soft);
  font-size: 11px;
}

/* 7. Page layout */

.page-content {
  width: 100%;
  max-width: 1600px;
  padding: 28px 30px 20px;
  margin-inline: auto;
  animation: page-enter 300ms ease both;
}

.page-section {
  min-width: 0;
}

/* 8. Welcome hero */

.welcome-section {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;

  min-height: 245px;
  padding: clamp(24px, 3vw, 40px);

  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);

  background:
    radial-gradient(
      ellipse at 12% 10%,
      rgb(124 58 237 / 7%),
      transparent 35%
    ),
    radial-gradient(
      ellipse at 85% 90%,
      rgb(0 82 255 / 10%),
      transparent 42%
    ),
    var(--surface);
}

.welcome-copy {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 670px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;

  padding: 6px 10px;
  margin-bottom: 10px;

  border: 1px solid var(--primary-border);
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);

  font-size: 11px;
  font-weight: 700;
}

.eyebrow > i {
  font-size: 13px;
}

.welcome-copy h1 {
  margin: 0 0 11px;
  font-size: clamp(27px, 3vw, 39px);
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.7px;
}

.welcome-copy h1 .text-accent {
  display: inline-block;
  font-family: "Inter", sans-serif;
  letter-spacing: -1px;
}

.welcome-copy > p {
  max-width: 550px;
  margin: 0 0 22px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.9;
}

.welcome-visual {
  position: relative;
  display: grid;
  place-items: center;

  width: 240px;
  height: 210px;
  min-width: 210px;
  flex-shrink: 0;
}

.visual-orbit {
  position: absolute;
  display: block;
  border: 1px solid var(--primary-border);
  border-radius: 50%;
  transform: rotate(-22deg);
}

.orbit-one {
  width: 190px;
  height: 125px;
}

.orbit-two {
  width: 145px;
  height: 190px;
  transform: rotate(38deg);
}

.visual-center {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;

  width: 93px;
  height: 93px;

  border: 1px solid var(--primary-border);
  border-radius: 28px;
  background: linear-gradient(145deg, var(--primary), #6C7BFF);
  color: #FFFFFF;

  box-shadow: 0 15px 32px rgb(0 82 255 / 20%);
  transform: rotate(-7deg);
}

.visual-center > i {
  font-size: 40px;
}

.floating-icon {
  position: absolute;
  z-index: 3;
  display: grid;
  place-items: center;

  width: 43px;
  height: 43px;

  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  color: var(--primary);
  box-shadow: var(--shadow-md);

  animation: float-gently 5s ease-in-out infinite;
}

.floating-icon > i {
  font-size: 20px;
}

.floating-one {
  inset-block-start: 9px;
  inset-inline-end: 25px;
}

.floating-two {
  inset-block-end: 16px;
  inset-inline-start: 15px;
  color: var(--warning);
  animation-delay: -1.4s;
}

.floating-three {
  inset-block-end: 20px;
  inset-inline-end: 15px;
  color: var(--violet);
  animation-delay: -2.2s;
}

/* 9. Quick links */

.quick-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.quick-link {
  display: flex;
  align-items: center;
  gap: 11px;

  min-width: 0;
  min-height: 75px;
  padding: 14px;

  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);

  font-size: 13px;
  font-weight: 700;

  transition:
    transform var(--transition),
    border-color var(--transition),
    background var(--transition),
    box-shadow var(--transition);
}

.quick-link > span:nth-child(2) {
  min-width: 0;
  flex: 1;
  overflow-wrap: anywhere;
}

.quick-link:hover {
  transform: translateY(-3px);
  border-color: var(--primary-border);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.quick-icon {
  display: grid;
  place-items: center;

  width: 43px;
  height: 43px;
  min-width: 43px;
  flex-shrink: 0;

  border-radius: 13px;
  font-size: 20px;
}

.icon-blue {
  background: #EAF0FF;
  color: #0052FF;
}

.icon-purple {
  background: #F0EAFE;
  color: #7C3AED;
}

.icon-green {
  background: #E4F8EF;
  color: #0C9A67;
}

.icon-orange {
  background: #FFF1DF;
  color: #C87915;
}

.quick-arrow {
  flex-shrink: 0;
  color: var(--text-soft);
  font-size: 14px;
  transition:
    color var(--transition),
    transform var(--transition);
}

.quick-link:hover .quick-arrow {
  color: var(--primary);
  transform: translate(-2px, -2px);
}

:root[data-theme="dark"] .icon-blue {
  background: #1D2D50;
  color: #8CB0FF;
}

:root[data-theme="dark"] .icon-purple {
  background: #30234B;
  color: #C4ABFF;
}

:root[data-theme="dark"] .icon-green {
  background: #153A31;
  color: #6BE0B1;
}

:root[data-theme="dark"] .icon-orange {
  background: #42301B;
  color: #FFC477;
}

/* 10. Course cards */

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 18px;
}

.course-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;

  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);

  transition:
    transform var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
}

.course-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary-border);
  box-shadow: var(--shadow-md);
}

/* Image/illustration region */

.course-card-art {
  position: relative;
  display: grid;
  place-items: center;

  min-height: 143px;
  padding: 18px;
  overflow: hidden;

  background: var(--primary-soft);
  color: var(--primary);
}

.course-card-art::before,
.course-card-art::after {
  position: absolute;
  border: 1px solid currentColor;
  border-radius: 50%;
  content: "";
  opacity: 0.12;
}

.course-card-art::before {
  width: 165px;
  height: 165px;
  transform: translate(30%, 15%);
}

.course-card-art::after {
  width: 95px;
  height: 95px;
  transform: translate(-65%, -40%);
}

.course-card-art > i {
  position: relative;
  z-index: 1;
  font-size: 48px;
  transition: transform var(--transition);
}

.course-cover-image {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-icon-image {
  width: 52px;
  height: 52px;
  margin-bottom: 10px;
  border-radius: 12px;
  object-fit: contain;
}

.course-media-load-error {
  position: relative;
  z-index: 1;
  color: var(--text-muted);
  font-size: 12px;
  text-align: center;
}

.course-details-button {
  padding: 5px 9px;
  border: 1px solid var(--primary-border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--primary);
  font: inherit;
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
}

.course-detail-view {
  padding: 22px;
  margin-block: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
}

.course-detail-heading,
.course-lesson-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.course-detail-heading h2,
.course-unit-section h3,
.course-lesson-heading h4 {
  margin: 0;
}

.course-detail-heading p,
.course-unit-section > p,
.course-lesson-description {
  color: var(--text-muted);
}

.course-unit-section {
  padding-block: 20px 8px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

.course-lesson {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-top: 12px;
  background: var(--surface-soft);
}

.lesson-video {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.lesson-video iframe {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  border-radius: var(--radius-md);
  background: #000;
}

.lesson-thumbnail {
  display: block;
  width: min(100%, 560px);
  max-height: 300px;
  border-radius: var(--radius-md);
  margin-top: 12px;
  object-fit: contain;
}

.course-lesson-content {
  margin-top: 14px;
  line-height: 1.9;
  white-space: pre-wrap;
}

.course-access-message {
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--surface-soft);
}

.course-access-message p {
  margin-top: 0;
}

.course-card:hover .course-card-art > i {
  transform: scale(1.08);
}

.course-art-blue {
  background: linear-gradient(135deg, #EAF0FF, #DDE7FF);
  color: #0052FF;
}

.course-art-purple {
  background: linear-gradient(135deg, #F2EBFF, #E4DBFF);
  color: #7040D8;
}

.course-art-green {
  background: linear-gradient(135deg, #E4F8EF, #D4F3E5);
  color: #0C9A67;
}

:root[data-theme="dark"] .course-art-blue {
  background: linear-gradient(135deg, #1B2B4D, #233862);
  color: #8CB0FF;
}

:root[data-theme="dark"] .course-art-purple {
  background: linear-gradient(135deg, #302344, #3A2D56);
  color: #C4ABFF;
}

:root[data-theme="dark"] .course-art-green {
  background: linear-gradient(135deg, #15352F, #1C4539);
  color: #6BE0B1;
}

.course-badge {
  position: absolute;
  z-index: 2;
  inset-block-start: 12px;
  inset-inline-start: 12px;

  padding: 4px 9px;
  border: 1px solid rgb(255 255 255 / 35%);
  border-radius: 8px;
  background: rgb(255 255 255 / 82%);
  color: #34415A;

  font-size: 10px;
  font-weight: 700;
  backdrop-filter: blur(8px);
}

/* Course card content */

.course-card-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 9px;
  padding: 17px;
}

.card-category {
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
}

.course-card h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
}

.course-card-body > p {
  display: -webkit-box;
  margin: 0;

  overflow: hidden;
  color: var(--text-muted);

  font-size: 12px;
  line-height: 1.85;

  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  line-clamp: 3;
}

.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 14px;
  margin-top: auto;
  padding-top: 5px;
  color: var(--text-muted);
  font-size: 11px;
}

.course-meta > span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.course-meta i {
  font-size: 14px;
}

.course-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-top: 12px;
  margin-top: 4px;
  border-top: 1px solid var(--border);
}

.level-label {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
}

.status-label {
  padding: 4px 9px;
  border-radius: 8px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
}

/* 11. Two-column content areas */

.content-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 24px;
  margin-top: 4px;
}

.content-columns > .content-section {
  min-width: 0;
}

.content-columns .section-heading {
  min-height: 58px;
}

/* 12. Compact lists and AI tools */

.compact-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.compact-item {
  display: flex;
  align-items: center;
  gap: 12px;

  min-width: 0;
  min-height: 70px;
  padding: 12px 14px;

  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);

  transition:
    border-color var(--transition),
    background var(--transition),
    transform var(--transition);
}

.compact-item:hover {
  border-color: var(--primary-border);
  background: var(--surface-soft);
}

.compact-item > i:last-child {
  margin-inline-start: auto;
  color: var(--text-soft);
  font-size: 14px;
}

.tool-logo {
  display: grid;
  place-items: center;

  width: 43px;
  height: 43px;
  min-width: 43px;
  flex-shrink: 0;

  border-radius: 12px;
  font-size: 20px;
}

.tool-logo-blue {
  background: var(--primary-soft);
  color: var(--primary);
}

.tool-logo-purple {
  background: #F0EAFE;
  color: #7C3AED;
}

.tool-logo-green {
  background: #E4F8EF;
  color: #0C9A67;
}

:root[data-theme="dark"] .tool-logo-purple {
  background: #302344;
  color: #C4ABFF;
}

:root[data-theme="dark"] .tool-logo-green {
  background: #15352F;
  color: #6BE0B1;
}

.compact-info {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.compact-info strong {
  overflow: hidden;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.compact-info small {
  overflow: hidden;
  color: var(--text-muted);
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 13. Announcements */

.announcement-card {
  display: flex;
  align-items: flex-start;
  gap: 13px;

  min-width: 0;
  padding: 18px;

  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);

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

.announcement-card:hover {
  border-color: var(--primary-border);
}

.announcement-icon {
  display: grid;
  place-items: center;

  width: 44px;
  height: 44px;
  min-width: 44px;
  flex-shrink: 0;

  border-radius: 13px;
  background: #FFF1DF;
  color: #C87915;
  font-size: 19px;
}

:root[data-theme="dark"] .announcement-icon {
  background: #42301B;
  color: #FFC477;
}

.announcement-card > div {
  min-width: 0;
}

.announcement-date {
  display: inline-block;
  margin-bottom: 5px;
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
}

.announcement-card h3 {
  margin: 0 0 5px;
  font-size: 15px;
  line-height: 1.6;
}

.announcement-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.9;
}

/* 14. Resource cards */

#resourcesSection > .resource-card + .resource-card {
  margin-top: 10px;
}

.resource-card {
  display: flex;
  align-items: center;
  gap: 12px;

  min-width: 0;
  min-height: 73px;
  padding: 12px 14px;

  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);

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

.resource-card:hover {
  border-color: var(--primary-border);
  background: var(--surface-soft);
}

.resource-icon {
  display: grid;
  place-items: center;

  width: 43px;
  height: 43px;
  min-width: 43px;
  flex-shrink: 0;

  border-radius: 12px;
  background: #FDECEC;
  color: #D84A4A;
  font-size: 20px;
}

.resource-image {
  background: var(--primary-soft);
  color: var(--primary);
}

:root[data-theme="dark"] .resource-icon {
  background: #43252D;
  color: #FFAAAA;
}

:root[data-theme="dark"] .resource-image {
  background: #1D2D50;
  color: #8CB0FF;
}

.resource-type {
  flex-shrink: 0;
  padding: 4px 7px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text-muted);
  font-family: "Inter", sans-serif;
  font-size: 10px;
  font-weight: 700;
}

/* 15. Prompt cards */

.prompt-card {
  min-width: 0;
  padding: 17px;

  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);

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

.prompt-card:hover {
  border-color: var(--primary-border);
}

.prompt-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.prompt-category {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
}

.prompt-category > i {
  font-size: 16px;
}

.copy-button {
  width: 36px;
  height: 36px;
  min-width: 36px;
  border-radius: 10px;
}

.prompt-card > p {
  padding: 13px;
  margin: 0 0 10px;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.prompt-hint {
  display: inline-block;
  color: var(--text-soft);
  font-size: 11px;
}

/* 16. Sessions and empty states */

.session-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.session-item {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.session-date {
  display: grid;
  place-items: center;
  width: 52px;
  min-width: 52px;
  min-height: 56px;
  padding: 5px;
  border-radius: 11px;
  background: var(--primary-soft);
  color: var(--primary);
  text-align: center;
}

.session-date strong {
  font-size: 20px;
  line-height: 1.2;
}

.session-date span {
  font-size: 11px;
}

.session-info {
  flex: 1;
  min-width: 0;
}

.session-info strong {
  display: block;
  font-size: 14px;
}

.session-info p {
  margin: 3px 0 0;
  color: var(--text-muted);
  font-size: 12px;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;

  min-height: 195px;
  padding: 25px;

  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  color: var(--text-muted);
  text-align: center;
}

.empty-state-icon {
  display: grid;
  place-items: center;
  width: 51px;
  height: 51px;
  margin-bottom: 4px;
  border-radius: 16px;
  background: var(--surface-soft);
  color: var(--primary);
}

.empty-state-icon > i {
  font-size: 24px;
}

.empty-state h3 {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

.empty-state p {
  max-width: 400px;
  margin: 0;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1.9;
}

/* 17. Secondary pages */

.secondary-page {
  min-height: 60vh;
  padding-top: 4px;
}

.secondary-page-heading {
  padding: 28px;
  margin-bottom: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(
      ellipse at 10% 10%,
      rgb(0 82 255 / 7%),
      transparent 45%
    ),
    var(--surface);
}

.secondary-page-heading h1 {
  margin: 0 0 7px;
  font-size: clamp(25px, 3vw, 34px);
  line-height: 1.4;
}

.secondary-page-heading p {
  margin: 0;
  color: var(--text-muted);
  font-size: 14px;
}

/* 18. Footer */

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;

  padding: 20px 0 7px;
  margin-top: 35px;

  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
}

/* 19. Toast notifications */

.toast {
  position: fixed;
  z-index: 200;
  inset-inline-end: 24px;
  bottom: 24px;

  display: flex;
  align-items: center;
  gap: 10px;

  width: max-content;
  max-width: min(420px, calc(100vw - 32px));
  padding: 13px 17px;

  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-lg);

  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);

  transition:
    opacity var(--transition),
    transform var(--transition),
    visibility var(--transition);
}

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

/* 20. Hover and interaction polish */

@media (hover: hover) {
  .resource-card,
  .compact-item,
  .announcement-card,
  .quick-link {
    will-change: auto;
  }
}

button:disabled,
a[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
}

/* 21. Animations */

@keyframes page-enter {
  from {
    opacity: 0;
    transform: translateY(7px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float-gently {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-7px);
  }
}

/* 22. Medium desktop and laptop screens */

@media (max-width: 1200px) {
  .page-content {
    padding-inline: 24px;
  }

  .topbar {
    padding-inline: 22px;
  }

  .quick-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .welcome-visual {
    width: 200px;
    min-width: 180px;
  }
}

/* 23. Tablet screens */

@media (max-width: 900px) and (min-width: 769px) {
  :root {
    --sidebar-width: 230px;
    --sidebar-collapsed-width: 72px;
  }

  .sidebar {
    padding-inline: 10px;
  }

  .page-content {
    padding: 22px 18px;
  }

  .welcome-section {
    padding: 24px;
  }

  .welcome-visual {
    width: 165px;
    min-width: 150px;
    transform: scale(0.9);
  }

  .content-columns {
    gap: 17px;
  }

  .course-card-body {
    padding: 14px;
  }
}

/* 24. Mobile drawer and mobile layout */

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  body {
    min-width: min(320px, 100%);
  }

  /*
    On RTL, the sidebar sits on the right and slides in from the right.
    On LTR, it slides in from the left.
  */

  .sidebar {
    z-index: 140;
    inset-inline-start: 0;

    width: min(310px, 87vw);
    height: 100vh;
    height: 100dvh;
    padding: 16px 13px;

    border-inline-end: 1px solid var(--border);
    box-shadow: none;

    transform: translateX(105%);
    transition:
      transform var(--transition),
      background-color var(--transition);
  }

  html[dir="ltr"] .sidebar {
    transform: translateX(-105%);
  }

  body.sidebar-open .sidebar {
    width: min(310px, 87vw);
    padding-inline: 13px;
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  /* Restore all labels when the mobile drawer is open. */

  body[data-sidebar-collapsed="true"] .sidebar .brand-name,
  body[data-sidebar-collapsed="true"] .sidebar .nav-heading,
  body[data-sidebar-collapsed="true"] .sidebar .nav-link > span,
  body[data-sidebar-collapsed="true"] .sidebar #collapseSidebar > span {
    display: initial;
  }

  body[data-sidebar-collapsed="true"] .sidebar .nav-heading {
    display: block;
  }

  body[data-sidebar-collapsed="true"] .sidebar .sidebar-header {
    justify-content: space-between;
  }

  body[data-sidebar-collapsed="true"] .sidebar .brand {
    justify-content: flex-start;
    gap: 11px;
  }

  body[data-sidebar-collapsed="true"] .sidebar .nav-link {
    justify-content: flex-start;
    gap: 12px;
    padding-inline: 12px;
  }

  body[data-sidebar-collapsed="true"] .sidebar .sidebar-collapse {
    justify-content: flex-start;
    gap: 12px;
    padding-inline: 12px;
  }

  .sidebar-close {
    display: inline-flex;
  }

  .sidebar-header {
    margin-bottom: 18px;
  }

  .sidebar-overlay {
    z-index: 130;
  }

  body.sidebar-open {
    overflow: hidden;
  }

  /* Main content occupies the full mobile width. */

  .main-content,
  body[data-sidebar-collapsed="true"] .main-content {
    width: 100%;
    margin-inline-start: 0;
  }

  .topbar {
    z-index: 100;
    min-height: var(--header-height);
    gap: 8px;
    padding: 9px 13px;
  }

  .topbar-start {
    flex: 1;
    gap: 8px;
  }

  .desktop-menu {
    display: none;
  }

  .mobile-menu {
    display: inline-flex;
    width: 40px;
    height: 40px;
    min-width: 40px;
  }

  .global-search {
    width: 100%;
    min-height: 40px;
    gap: 7px;
    padding-inline: 10px;
  }

  .global-search input {
    font-size: 11px;
  }

  .global-search kbd {
    display: none;
  }

  .topbar-actions {
    gap: 6px;
  }

  .topbar-actions .icon-button {
    width: 39px;
    height: 39px;
    min-width: 39px;
  }

  .language-mark {
    font-size: 18px;
  }

  .profile-button {
    gap: 0;
    padding: 2px;
  }

  .profile-button-text,
  .profile-button > i:last-child {
    display: none;
  }

  .avatar {
    width: 34px;
    height: 34px;
    min-width: 34px;
  }

  .page-content {
    padding: 18px 15px 16px;
  }

  .welcome-section {
    min-height: 200px;
    gap: 10px;
    padding: 23px 20px;
    border-radius: var(--radius-lg);
  }

  .welcome-copy {
    max-width: 100%;
  }

  .welcome-copy h1 {
    font-size: clamp(24px, 5vw, 30px);
  }

  .welcome-copy > p {
    margin-bottom: 17px;
    font-size: 12px;
  }

  .welcome-visual {
    width: 135px;
    height: 145px;
    min-width: 115px;
    margin-inline-end: -12px;
    transform: scale(0.82);
  }

  .visual-center {
    width: 75px;
    height: 75px;
    border-radius: 23px;
  }

  .visual-center > i {
    font-size: 32px;
  }

  .floating-icon {
    width: 35px;
    height: 35px;
    border-radius: 11px;
  }

  .floating-icon > i {
    font-size: 17px;
  }

  .orbit-one {
    width: 150px;
    height: 105px;
  }

  .orbit-two {
    width: 110px;
    height: 150px;
  }

  .quick-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 14px;
  }

  .quick-link {
    min-height: 66px;
    gap: 9px;
    padding: 10px;
    border-radius: 13px;
    font-size: 12px;
  }

  .quick-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: 11px;
    font-size: 17px;
  }

  .quick-arrow {
    font-size: 12px;
  }

  .content-section {
    margin-top: 26px;
  }

  .section-heading {
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 13px;
  }

  .section-heading h2 {
    font-size: 18px;
  }

  .section-heading p {
    font-size: 11px;
  }

  .section-kicker {
    font-size: 11px;
  }

  .text-link {
    gap: 4px;
    padding-top: 4px;
    font-size: 11px;
  }

  /* Compact but consistent course cards. */

  .course-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .course-card {
    display: grid;
    grid-template-columns: 95px minmax(0, 1fr);
    min-height: 130px;
    border-radius: 14px;
  }

  .course-card:hover {
    transform: none;
    box-shadow: none;
  }

  .course-card-art {
    align-self: stretch;
    min-height: 100%;
    padding: 8px;
  }

  .course-card-art > i {
    font-size: 33px;
  }

  .course-badge {
    inset-block-start: 7px;
    inset-inline-start: 7px;
    padding: 3px 5px;
    font-size: 9px;
  }

  .course-card-body {
    gap: 5px;
    padding: 10px 11px;
  }

  .card-category {
    font-size: 10px;
  }

  .course-card h3 {
    font-size: 13px;
    line-height: 1.55;
  }

  .course-card-body > p {
    font-size: 10px;
    line-height: 1.65;
    -webkit-line-clamp: 2;
    line-clamp: 2;
  }

  .course-meta {
    gap: 3px 9px;
    padding-top: 3px;
    font-size: 10px;
  }

  .course-meta i {
    font-size: 12px;
  }

  .course-card-footer {
    gap: 6px;
    padding-top: 6px;
    margin-top: 0;
  }

  .level-label,
  .status-label {
    font-size: 9px;
  }

  .status-label {
    padding: 3px 6px;
  }

  /* Side-by-side sections become a single, aligned column. */

  .content-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 5px;
    margin-top: 0;
  }

  .content-columns > .content-section {
    width: 100%;
    margin-top: 25px;
  }

  .content-columns .section-heading {
    min-height: auto;
  }

  .compact-item {
    min-height: 65px;
    padding: 11px;
  }

  .tool-logo,
  .resource-icon {
    width: 39px;
    height: 39px;
    min-width: 39px;
    font-size: 18px;
  }

  .announcement-card {
    padding: 14px;
  }

  .announcement-icon {
    width: 39px;
    height: 39px;
    min-width: 39px;
  }

  .resource-card {
    min-height: 66px;
    padding: 10px;
  }

  .prompt-card {
    padding: 14px;
  }

  .empty-state {
    min-height: 175px;
    padding: 20px 14px;
  }

  .secondary-page-heading {
    padding: 21px 17px;
    border-radius: var(--radius-lg);
  }

  .secondary-page-heading h1 {
    font-size: 25px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-top: 17px;
    margin-top: 28px;
  }

  .toast {
    inset-inline: 14px;
    bottom: 14px;
    width: auto;
    max-width: none;
  }
}

/* 25. Extra-small mobile screens */

@media (max-width: 420px) {
  .topbar {
    gap: 5px;
    padding-inline: 9px;
  }

  .topbar-start {
    gap: 5px;
  }

  .topbar-actions {
    gap: 4px;
  }

  .topbar-actions .icon-button {
    width: 35px;
    height: 35px;
    min-width: 35px;
  }

  .mobile-menu {
    width: 35px;
    height: 35px;
    min-width: 35px;
  }

  .global-search {
    gap: 5px;
    padding-inline: 8px;
  }

  .global-search > i {
    font-size: 14px;
  }

  .global-search input {
    font-size: 10px;
  }

  .page-content {
    padding-inline: 11px;
  }

  .welcome-section {
    min-height: 185px;
    padding: 18px 14px;
  }

  .welcome-copy h1 {
    font-size: 22px;
  }

  .welcome-copy > p {
    font-size: 11px;
  }

  .welcome-visual {
    width: 92px;
    min-width: 80px;
    margin-inline-end: -19px;
    transform: scale(0.68);
  }

  .quick-links {
    gap: 8px;
  }

  .quick-link {
    gap: 7px;
    padding: 9px;
    font-size: 11px;
  }

  .quick-icon {
    width: 32px;
    height: 32px;
    min-width: 32px;
    font-size: 16px;
  }

  .quick-arrow {
    display: none;
  }

  .course-card {
    grid-template-columns: 79px minmax(0, 1fr);
    min-height: 120px;
  }

  .course-card-body {
    padding: 8px 9px;
  }

  .course-card h3 {
    font-size: 12px;
  }

  .course-card-body > p {
    font-size: 9px;
  }

  .course-meta {
    font-size: 9px;
  }

  .profile-button {
    display: none;
  }
}

/* 26. English / LTR layout */

html[dir="ltr"] body {
  font-family: "Inter", "IBM Plex Sans Arabic", sans-serif;
}

html[dir="ltr"] .welcome-copy h1 .text-accent {
  letter-spacing: -1px;
}

html[dir="ltr"] .nav-link.active::before,
html[dir="ltr"] .nav-link[aria-current="page"]::before {
  border-radius: 4px 0 0 4px;
}

html[dir="ltr"] .course-meta,
html[dir="ltr"] .resource-type,
html[dir="ltr"] .brand-name {
  font-family: "Inter", "IBM Plex Sans Arabic", sans-serif;
}

@media (max-width: 768px) {
  html[dir="ltr"] .sidebar {
    transform: translateX(-105%);
  }

  html[dir="ltr"] body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  html[dir="ltr"] .welcome-visual {
    margin-inline-end: -12px;
  }
}

/* 27. Reduced motion accessibility */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
/* AI Hub — Language icon only */

#languageToggle {
  overflow: hidden;
}

#languageToggle #languageLabel {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 24px;
  flex-shrink: 0;

  /* إخفاء كلمة اللغة الأصلية */
  font-size: 0 !important;
  line-height: 0;
}

/* الإنجليزية */
#languageToggle #languageLabel::before {
  content: "A";
  display: block;
  font-family: "Inter", sans-serif;
  font-size: 19px;
  font-weight: 800;
  line-height: 1;
}

/* العربية */
html[lang="ar"] #languageToggle #languageLabel::before,
html[dir="rtl"] #languageToggle #languageLabel::before {
  content: "ع";
  font-family: "IBM Plex Sans Arabic", sans-serif;
  font-size: 21px;
  font-weight: 800;
  line-height: 1;
}
/* AI Hub — Official Logo */
.brand-logo {
  overflow: hidden;
}

.brand-logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
/* إخفاء الصفحات التي تحمل خاصية hidden */
#pageContent .page-section[hidden] {
  display: none !important;
}
/* =========================================================
   AI Hub — Mobile viewport overflow fixes
   ========================================================= */

/* Keep the document within the viewport */
html,
body {
  width: 100%;
  max-width: 100%;
}

/* Prevent content containers from forcing extra width */
.app-shell,
.main-content,
.page-content,
.page-section {
  min-width: 0;
  max-width: 100%;
}

/* Mobile layout adjustments */
@media (max-width: 768px) {
  .topbar {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .topbar-start {
    flex: 1 1 0;
    min-width: 0;
  }

  .global-search {
    flex: 1 1 0;
    width: auto;
    max-width: 100%;
    min-width: 0;
  }

  .topbar-actions {
    flex-shrink: 0;
  }

  .welcome-section {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .welcome-copy {
    width: auto;
    min-width: 0;
    overflow-wrap: anywhere;
  }

  .welcome-visual {
    flex: 0 1 135px;
    min-width: 0;
  }

  .course-card,
  .course-card-body,
  .resource-card,
  .compact-item,
  .prompt-card,
  .announcement-card,
  .session-item {
    min-width: 0;
    max-width: 100%;
  }

  .course-card h3,
  .course-card-body > p,
  .compact-info,
  .resource-card {
    overflow-wrap: anywhere;
  }
}

/* Extra-small phones */
@media (max-width: 420px) {
  .topbar {
    gap: 4px;
  }

  .topbar-start {
    gap: 4px;
  }

  .topbar-actions {
    gap: 3px;
  }

  .welcome-visual {
    flex-basis: 80px;
  }
}
/* AI Hub — Fix mobile welcome section overflow */

@media (max-width: 768px) {
  .welcome-section {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 120px;
    align-items: center;
    gap: 8px;
    width: 100%;
    max-width: 100%;
  }

  .welcome-copy {
    width: auto;
    min-width: 0;
    max-width: 100%;
  }

  .welcome-copy h1,
  .welcome-copy > p {
    overflow-wrap: anywhere;
  }

  .welcome-visual {
    width: 120px;
    min-width: 0;
    height: 130px;
    margin: 0;
    transform: none;
  }

  .orbit-one {
    width: 100px;
    height: 70px;
  }

  .orbit-two {
    width: 75px;
    height: 100px;
  }

  .visual-center {
    width: 68px;
    height: 68px;
  }

  .visual-center > i {
    font-size: 28px;
  }

  .floating-icon {
    width: 30px;
    height: 30px;
  }
}

@media (max-width: 420px) {
  .welcome-section {
    grid-template-columns: minmax(0, 1fr) 84px;
    gap: 5px;
    padding: 16px 12px;
  }

  .welcome-copy h1 {
    font-size: clamp(19px, 5.5vw, 22px);
  }

  .welcome-copy > p {
    font-size: 11px;
  }

  .welcome-visual {
    width: 84px;
    height: 95px;
  }

  .orbit-one {
    width: 70px;
    height: 50px;
  }

  .orbit-two {
    width: 52px;
    height: 70px;
  }

  .visual-center {
    width: 48px;
    height: 48px;
    border-radius: 15px;
  }

  .visual-center > i {
    font-size: 23px;
  }

  .floating-icon {
    width: 24px;
    height: 24px;
    border-radius: 8px;
  }

  .floating-icon > i {
    font-size: 13px;
  }
}