:root {
  --gth-ink: #0c2a33;
  --gth-teal: #087f9b;
  --gth-cyan: #19a8c8;
  --gth-coral: #e7374f;
  --gth-sand: #ffd08a;
  --gth-cream: #fff6e8;
  --gth-bg: #f4f8fa;
  --gth-muted: #66777e;
  --gth-line: #d8e7ec;
  --gth-surface: rgba(255, 255, 255, 0.86);
  --gth-shadow-sm: 0 10px 28px rgba(12, 42, 51, 0.055);
  --gth-shadow-md: 0 18px 46px rgba(12, 42, 51, 0.08);
  --bs-body-bg: var(--gth-bg);
  --bs-body-color: var(--gth-ink);
  --bs-primary: var(--gth-teal);
  --bs-primary-rgb: 8, 127, 155;
  --bs-link-color: var(--gth-teal);
  --bs-link-hover-color: var(--gth-ink);
  --bs-border-radius: 0.5rem;
  --bs-border-color: #d8e7ec;
}

body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(25, 168, 200, 0.12), transparent 26rem),
    linear-gradient(180deg, #f8fbfc 0%, var(--gth-bg) 46rem);
  animation: pageFadeIn 0.45s ease both;
}

.landing-page {
  background:
    linear-gradient(135deg, rgba(232, 246, 250, 0.9), rgba(255, 246, 232, 0.85)),
    var(--gth-bg);
  background-size: 140% 140%;
  animation: pageFadeIn 0.45s ease both, landingGlow 14s ease-in-out infinite alternate;
}

.navbar {
  background: rgba(255, 255, 255, 0.9) !important;
  backdrop-filter: blur(14px);
  box-shadow: 0 10px 30px rgba(12, 42, 51, 0.045);
  animation: slideDown 0.45s ease both;
}

.brand-logo {
  width: 54px;
  height: 54px;
  object-fit: cover;
  border: 2px solid #e9f2f5;
  border-radius: 50%;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.navbar-brand:hover .brand-logo {
  box-shadow: 0 10px 24px rgba(8, 127, 155, 0.18);
  transform: rotate(-2deg) scale(1.04);
}

.navbar-brand strong,
.display-title,
.card h2,
.card h3 {
  color: var(--gth-ink);
}

.nav-link {
  border-radius: 0.5rem;
  font-weight: 700;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gth-teal) !important;
  background: #e8f6fa;
}

.nav-link:hover {
  transform: translateX(0.12rem);
}

.display-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1;
}

.hero-title {
  color: var(--gth-ink);
  font-size: clamp(2.5rem, 7vw, 5.2rem);
  font-weight: 850;
  line-height: 0.98;
}

.landing-hero {
  min-height: 70vh;
  display: grid;
  align-items: center;
  padding: 4rem 0;
}

.landing-hero .section-label,
.landing-hero .hero-title,
.landing-hero .lead,
.landing-hero .btn {
  animation: riseIn 0.55s ease both;
}

.landing-hero .hero-title {
  animation-delay: 0.08s;
}

.landing-hero .lead {
  animation-delay: 0.16s;
}

.landing-hero .btn {
  animation-delay: 0.24s;
}

.logo-showcase {
  display: grid;
  width: min(100%, 24rem);
  aspect-ratio: 1;
  place-items: center;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 24px 70px rgba(12, 42, 51, 0.16);
  animation: riseIn 0.65s 0.18s ease both, gentleFloat 5.5s 1s ease-in-out infinite;
  transition: transform 0.35s ease, box-shadow 0.35s ease, background 0.35s ease;
}

.logo-showcase:hover,
.logo-showcase:focus-within {
  transform: translateY(-0.35rem) rotate(-2deg) scale(1.04);
  box-shadow: 0 36px 96px rgba(8, 127, 155, 0.24);
  background: radial-gradient(circle at top left, rgba(25, 168, 200, 0.15), #fff 56%);
}

.logo-showcase:hover img,
.logo-showcase:focus-within img {
  transform: rotate(-2deg) scale(1.04);
  filter: drop-shadow(0 0 18px rgba(8, 127, 155, 0.22));
}

.logo-showcase img {
  width: 84%;
  height: 84%;
  object-fit: cover;
  border-radius: 50%;
  transition: transform 0.35s ease, filter 0.35s ease;
}

.section-label {
  color: var(--gth-coral);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.card {
  border-color: var(--gth-line);
  border-radius: 0.5rem;
  background: var(--gth-surface);
  box-shadow: var(--gth-shadow-sm);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.card:hover {
  border-color: #bfdae2;
  box-shadow: var(--gth-shadow-md);
  transform: translateY(-0.08rem);
}

.metric-card {
  border-top: 4px solid var(--gth-cyan);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 251, 252, 0.9)),
    #fff;
  animation: riseIn 0.5s ease both;
}

.metric-card .card-body {
  min-height: 7.25rem;
  padding: 1.2rem;
}

.dashboard-jump {
  cursor: pointer;
}

.dashboard-jump:focus-visible {
  border-color: var(--gth-cyan);
  box-shadow: 0 0 0 0.22rem rgba(25, 168, 200, 0.16), 0 26px 60px rgba(12, 42, 51, 0.13);
  outline: 0;
}

.metric-value {
  color: var(--gth-teal);
  font-size: 2.05rem;
  line-height: 1.1;
  margin: 0.45rem 0 0.2rem;
  animation: popIn 0.45s 0.14s ease both;
}

.btn {
  border-radius: 0.5rem;
  font-weight: 750;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  box-shadow: 0 12px 28px rgba(8, 127, 155, 0.18);
  transform: translateY(-0.12rem);
}

.btn:active {
  transform: translateY(0);
}

.form-control,
.form-select,
.form-check-input {
  border-color: var(--gth-line);
  background-color: rgba(255, 255, 255, 0.82);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.form-control:focus,
.form-select:focus {
  box-shadow: 0 0 0 0.22rem rgba(25, 168, 200, 0.16);
}

.form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(25, 168, 200, 0.16);
}

.btn-primary {
  --bs-btn-bg: var(--gth-teal);
  --bs-btn-border-color: var(--gth-teal);
  --bs-btn-hover-bg: var(--gth-ink);
  --bs-btn-hover-border-color: var(--gth-ink);
  --bs-btn-active-bg: var(--gth-ink);
  --bs-btn-active-border-color: var(--gth-ink);
}

.btn-outline-primary {
  --bs-btn-color: var(--gth-teal);
  --bs-btn-border-color: #9bd6e2;
  --bs-btn-hover-bg: var(--gth-teal);
  --bs-btn-hover-border-color: var(--gth-teal);
  --bs-btn-active-bg: var(--gth-teal);
  --bs-btn-active-border-color: var(--gth-teal);
}

.btn-outline-secondary {
  --bs-btn-color: var(--gth-ink);
  --bs-btn-border-color: #c8dde3;
  --bs-btn-hover-bg: #e8f6fa;
  --bs-btn-hover-border-color: #9bd6e2;
  --bs-btn-hover-color: var(--gth-ink);
}

.course-card {
  border-color: var(--gth-line);
  box-shadow: none;
  cursor: pointer;
  overflow: hidden;
  transition: box-shadow 0.35s ease, transform 0.35s ease, border-color 0.35s ease;
}

.course-card:hover,
.course-card:focus-visible,
.course-card.course-card-active {
  border-color: var(--gth-cyan);
  box-shadow: 0 20px 48px rgba(8, 127, 155, 0.18);
  outline: 0;
  transform: translateY(-0.12rem);
}

.course-card.course-card-active {
  box-shadow: 0 24px 58px rgba(8, 127, 155, 0.24);
}

.course-card.course-search-match {
  border-color: var(--gth-cyan);
  box-shadow: 0 22px 55px rgba(8, 127, 155, 0.24);
  transform: translateY(-0.35rem);
}

.course-search .form-control {
  width: min(45vw, 16rem);
}

.course-search-wide .form-control {
  width: auto;
  flex: 1 1 auto;
}

.course-workspace {
  display: grid;
  gap: 1rem;
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid #c9e0e7;
  border-radius: 0.75rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(232, 246, 250, 0.58)),
    #fff;
  box-shadow: var(--gth-shadow-md);
  animation: sectionIn 0.28s ease both;
}

.course-workspace-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: start;
}

.course-workspace-meta {
  display: grid;
  gap: 0.35rem;
  justify-items: end;
}

.course-workspace-meta strong {
  color: var(--gth-teal);
  font-size: 1.75rem;
  line-height: 1;
}

.course-workspace-progress {
  height: 0.7rem;
}

.course-workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(16rem, 0.65fr);
  gap: 1rem;
}

.course-workspace-panel {
  padding: 1rem;
  border: 1px solid var(--gth-line);
  border-radius: 0.65rem;
  background: rgba(255, 255, 255, 0.82);
}

.course-workspace-panel-main {
  background:
    linear-gradient(180deg, #fff, #f8fbfc),
    #fff;
}

.course-module-list {
  display: grid;
  gap: 0.65rem;
  margin-top: 1rem;
}

.course-module-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--gth-line);
  border-radius: 0.55rem;
  background: #fff;
}

.course-module-number {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  flex: 0 0 2.25rem;
  place-items: center;
  border-radius: 0.5rem;
  background: #e8f6fa;
  color: var(--gth-teal);
  font-weight: 900;
}

.course-activity-list {
  padding-left: 0.75rem;
  border-left: 3px solid #d8e7ec;
}

.course-workspace-coral {
  border-color: rgba(231, 55, 79, 0.32);
}

.course-workspace-coral .course-module-number {
  background: #fff0f2;
  color: var(--gth-coral);
}

.course-workspace-sand {
  border-color: rgba(244, 183, 94, 0.48);
}

.course-workspace-sand .course-module-number {
  background: var(--gth-cream);
  color: #81510b;
}

.announcement-item {
  position: relative;
  padding: 1rem;
  border: 1px solid var(--gth-line);
  border-radius: 0.65rem;
  background:
    linear-gradient(180deg, #fff, #fbfdfe),
    #fff;
  animation: riseIn 0.38s ease both;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.announcement-item:hover {
  border-color: #bfdae2;
  box-shadow: 0 14px 34px rgba(12, 42, 51, 0.085);
  transform: translateY(-0.08rem);
}

.announcement-item .badge,
.video-resource .badge {
  font-size: 0.72rem;
}

.announcement-item h3,
.video-resource h3 {
  line-height: 1.25;
}

.announcement-pinned {
  border-color: var(--gth-sand);
  background: linear-gradient(135deg, #fffaf1, #fff);
}

.announcement-comments-collapsed {
  display: none !important;
}

.announcement-comments {
  padding-top: 0.75rem;
  border-top: 1px solid #e4eef2;
  animation: fadeIn 0.22s ease both;
}

.announcement-comment {
  padding: 0.55rem 0.65rem;
  border: 1px solid #e4eef2;
  border-radius: 0.5rem;
  background: #f8fbfc;
  animation: fadeIn 0.25s ease both;
}

.assignment-submission {
  padding: 0.75rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.5rem;
  background: #f8fbfc;
}

.assignment-upload-form {
  padding: 0.85rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.65rem;
  background: #f8fbfc;
}

.assignment-workspace {
  align-items: flex-start;
}

.assignment-form-column,
.assignment-list-column {
  position: sticky;
  top: 6rem;
  align-self: flex-start;
}

.assignment-list-card {
  max-height: calc(100dvh - 7rem);
  overflow: hidden;
}

.assignment-list-card > .card-body {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  max-height: inherit;
}

#adminAssignments {
  min-height: 14rem;
  max-height: 100%;
  padding-right: 0.2rem;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.assignment-card {
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.assignment-card-expanded {
  border-color: #bfd9e1;
  box-shadow: 0 16px 36px rgba(12, 42, 51, 0.1);
}

.assignment-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.85rem;
}

.assignment-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  flex: 0 0 auto;
  min-height: 2rem;
  padding: 0.35rem 0.55rem;
  border: 1px solid #cfe2e8;
  border-radius: 0.45rem;
  color: var(--gth-teal);
  background: #f8fbfc;
  font-size: 0.78rem;
  font-weight: 850;
}

.assignment-toggle:hover,
.assignment-toggle:focus {
  border-color: #a7ced8;
  background: #e8f6fa;
  outline: 0;
}

.assignment-toggle-icon {
  display: grid;
  width: 1rem;
  height: 1rem;
  place-items: center;
  border-radius: 50%;
  background: #e4eef2;
  line-height: 1;
}

.assignment-preview {
  display: -webkit-box;
  margin-top: 0.65rem;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.assignment-card-details {
  display: grid;
  gap: 0.85rem;
  margin-top: 0.85rem;
  animation: fadeIn 0.2s ease both;
}

.assignment-review {
  padding-top: 0.85rem;
  border-top: 1px solid #e4eef2;
}

.assignment-review-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(8rem, 10rem);
  gap: 0.75rem;
  padding: 0.75rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.65rem;
  background: #f8fbfc;
}

.assignment-review-info {
  min-width: 0;
}

.assignment-grade-form {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: repeat(3, minmax(5.5rem, 1fr)) minmax(7rem, auto) auto;
  gap: 0.65rem;
  align-items: end;
  padding-top: 0.75rem;
  border-top: 1px solid #e4eef2;
}

.assignment-final-grade,
.course-grade-tile {
  display: grid;
  gap: 0.2rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.5rem;
  background: #fff;
}

.assignment-final-grade span,
.course-grade-tile span {
  color: #5f7279;
  font-size: 0.78rem;
  font-weight: 800;
}

.assignment-final-grade strong,
.course-grade-tile strong {
  color: var(--gth-teal);
  line-height: 1;
}

.course-grade-summary {
  padding-top: 1rem;
  border-top: 1px solid #e4eef2;
}

.course-grade-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 7rem), 1fr));
  gap: 0.65rem;
}

.gradebook-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
  gap: 0.75rem;
}

.gradebook-summary article,
.gradebook-course {
  border: 1px solid #d8e7ec;
  border-radius: 0.65rem;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 251, 252, 0.92)),
    #fff;
}

.gradebook-summary article {
  display: grid;
  gap: 0.25rem;
  min-height: 5.75rem;
  padding: 0.9rem;
}

.gradebook-summary span,
.gradebook-average span {
  color: #5f7279;
  font-size: 0.82rem;
  font-weight: 800;
}

.gradebook-summary strong,
.gradebook-average strong {
  color: var(--gth-teal);
  font-size: 1.55rem;
  line-height: 1;
}

.gradebook-course {
  padding: 1rem;
  box-shadow: 0 12px 30px rgba(12, 42, 51, 0.055);
}

.gradebook-course-header,
.gradebook-row {
  display: grid;
  gap: 1rem;
  align-items: center;
}

.gradebook-course-header {
  grid-template-columns: minmax(0, 1fr) auto;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid #e4eef2;
}

.gradebook-average {
  display: grid;
  gap: 0.25rem;
  min-width: 8.5rem;
  padding: 0.75rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.55rem;
  background: #f8fbfc;
}

.gradebook-rows {
  display: grid;
  gap: 0.75rem;
  padding-top: 0.85rem;
}

.gradebook-row {
  grid-template-columns: minmax(12rem, 0.4fr) minmax(0, 1fr);
  padding: 0.75rem;
  border: 1px solid #e4eef2;
  border-radius: 0.6rem;
  background: #fff;
}

.gradebook-student {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 0.65rem;
  align-items: center;
  min-width: 0;
}

.gradebook-student .avatar {
  grid-row: span 2;
}

.gradebook-student strong,
.gradebook-student small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gradebook-grade-form {
  grid-column: auto;
  grid-template-columns: repeat(3, minmax(4.75rem, 1fr)) minmax(7rem, auto) auto;
  padding-top: 0;
  border-top: 0;
}

.student-dashboard-shell {
  display: grid;
  grid-template-columns: minmax(10rem, 14rem) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.section-menu-toggle,
.section-menu-backdrop {
  display: none;
}

.section-menu-icon {
  position: relative;
  display: inline-block;
  width: 1.1rem;
  height: 0.8rem;
}

.section-menu-icon::before,
.section-menu-icon::after,
.section-menu-icon {
  border-top: 2px solid currentColor;
}

.section-menu-icon::before,
.section-menu-icon::after {
  position: absolute;
  left: 0;
  width: 100%;
  content: "";
  transition: transform 0.2s ease, top 0.2s ease;
}

.section-menu-icon::before {
  top: 0.3rem;
}

.section-menu-icon::after {
  top: 0.6rem;
}

.section-menu-toggle.active .section-menu-icon {
  border-color: transparent;
}

.section-menu-toggle.active .section-menu-icon::before {
  top: 0.36rem;
  transform: rotate(45deg);
}

.section-menu-toggle.active .section-menu-icon::after {
  top: 0.36rem;
  transform: rotate(-45deg);
}

.student-section-nav {
  position: sticky;
  top: 5.6rem;
  display: grid;
  gap: 0.5rem;
  padding: 0.75rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.5rem;
  background:
    linear-gradient(180deg, #fff, #f9fcfd),
    #fff;
  box-shadow: 0 18px 45px rgba(12, 42, 51, 0.07);
  animation: riseIn 0.45s ease both;
}

.student-section-nav a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 0.85rem;
  border-radius: 0.45rem;
  color: var(--gth-ink);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.student-section-nav a::before {
  width: 0.45rem;
  height: 0.45rem;
  flex: 0 0 0.45rem;
  border-radius: 50%;
  background: #bfd9e1;
  content: "";
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.student-section-nav a:hover,
.student-section-nav a:focus,
.student-section-nav a.active {
  color: var(--gth-teal);
  background: #e8f6fa;
  outline: 0;
}

.student-section-nav a:hover::before,
.student-section-nav a:focus::before,
.student-section-nav a.active::before {
  background: var(--gth-coral);
  transform: scale(1.2);
}

.student-section-nav a:hover,
.student-section-nav a:focus {
  transform: translateX(0.12rem);
}

.student-section-content {
  display: grid;
  gap: 1rem;
  min-width: 0;
}

.student-section-card {
  display: none;
  scroll-margin-top: 6rem;
}

.student-section-card.active {
  display: block;
  animation: sectionIn 0.28s ease both;
}

.row.student-section-card.active {
  display: flex;
}

.student-section-content > .student-section-card.card,
.student-section-content > .student-section-card.row {
  border: 1px solid #d8e7ec;
  border-radius: 0.75rem;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(232, 246, 250, 0.62)),
    #fff;
  box-shadow: 0 22px 55px rgba(12, 42, 51, 0.08);
}

.student-section-content > .student-section-card.row {
  margin-top: 0;
  margin-right: 0;
  margin-left: 0;
  padding: 0.85rem;
}

.student-section-content > .student-section-card.card > .card-body {
  padding: 1.15rem;
}

.student-section-card .card {
  box-shadow: 0 12px 34px rgba(12, 42, 51, 0.07);
}

.student-section-card .card-body > .d-flex:first-child,
.student-section-card.card > .card-body > .section-label:first-child {
  position: relative;
}

.student-section-card h2 {
  font-weight: 850;
}

.student-section-card .card-body > .d-flex:first-child {
  padding-bottom: 0.85rem;
  border-bottom: 1px solid #e4eef2;
}

.student-section-card form.vstack,
.student-section-card .course-search {
  padding: 0.9rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.65rem;
  background: #fbfdfe;
}

.student-section-card .alert {
  border-radius: 0.6rem;
}

.student-section-card .badge {
  border: 1px solid rgba(8, 127, 155, 0.08);
}

.announcement-list,
#adminVideos,
#studentVideos,
#adminAssignments,
#studentAssignments,
#enrollmentRequests,
#studentInvitations {
  min-height: 4.5rem;
}

.student-section-card .text-secondary.mb-0:only-child,
.student-section-card .col-12.text-secondary.mb-0:only-child {
  padding: 1rem;
  border: 1px dashed #bfd9e1;
  border-radius: 0.65rem;
  background: rgba(255, 255, 255, 0.76);
}

.student-course-grid,
.grades-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
  gap: 1rem;
}

.grades-grid {
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr));
}

.grade-tile {
  display: grid;
  gap: 0.4rem;
  min-height: 8rem;
  padding: 1rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.65rem;
  background:
    linear-gradient(145deg, #fff, #f4fbfd),
    #fff;
  animation: riseIn 0.4s ease both;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.grade-tile:hover {
  border-color: #bfdae2;
  box-shadow: 0 16px 36px rgba(12, 42, 51, 0.11);
  transform: translateY(-0.14rem);
}

.grade-tile span {
  color: #5f7279;
  font-weight: 700;
}

.grade-tile strong {
  color: var(--gth-teal);
  font-size: 2rem;
  line-height: 1;
}

.student-feed > [id] > .card {
  height: 100%;
}

.student-course-panel,
.student-announcement-panel {
  flex: 0 0 100%;
  max-width: 100%;
  padding-right: calc(var(--bs-gutter-x) * 0.5);
  padding-left: calc(var(--bs-gutter-x) * 0.5);
}

.student-feed .announcement-list {
  max-height: 24rem;
  overflow-y: auto;
  padding-right: 0.15rem;
}

.student-course-panel .course-search {
  flex-wrap: wrap;
}

.student-course-panel .course-search .form-control {
  min-width: 0;
}

.student-course-panel .btn-group {
  flex-wrap: wrap;
}

.student-course-panel .course-strip {
  display: none;
}

.student-course-panel .course-card .col-md-9 {
  width: 100%;
}

.student-course-panel .course-card .card-body {
  padding: 0.85rem;
}

.student-course-panel .course-card p {
  font-size: 0.88rem;
}

@media (min-width: 1200px) {
  .student-course-panel {
    flex-basis: 20%;
    max-width: 20%;
  }

  .student-announcement-panel {
    flex-basis: 80%;
    max-width: 80%;
  }
}

.video-card {
  width: 100%;
}

.video-resource {
  border: 1px solid #d8e7ec;
  box-shadow: 0 10px 28px rgba(12, 42, 51, 0.06);
  overflow: hidden;
}

.video-resource:hover .video-thumb,
.video-announcement-item:hover .video-announcement-thumb,
.video-announcement-item:focus-visible .video-announcement-thumb {
  transform: scale(1.03);
}

.video-announcement-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  min-height: 8rem;
  border: 1px solid #d8e7ec;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.video-announcement-item:hover,
.video-announcement-item:focus-visible {
  border-color: var(--gth-cyan);
  box-shadow: 0 18px 42px rgba(8, 127, 155, 0.2);
  outline: 0;
  transform: translateY(-0.18rem);
}

.video-announcement-thumb {
  width: clamp(8rem, 22vw, 15rem);
  aspect-ratio: 16 / 9;
  flex: 0 0 clamp(8rem, 22vw, 15rem);
  border-radius: 0.5rem;
  object-fit: cover;
  background: #e8f0f3;
  transition: transform 0.25s ease;
}

.video-announcement-content {
  display: grid;
  gap: 0.2rem;
  flex: 1 1 auto;
  min-width: 0;
}

.video-announcement-details,
.meeting-session-details {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.video-announcement-details span,
.meeting-session-details span {
  padding: 0.35rem 0.55rem;
  border: 1px solid #d8e7ec;
  border-radius: 999px;
  background: rgba(232, 246, 250, 0.72);
  color: #5f7279;
  font-size: 0.78rem;
  font-weight: 750;
}

.video-announcement-action {
  margin-left: auto;
  white-space: nowrap;
}

.video-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #e8f0f3;
  transition: transform 0.28s ease;
}

.video-thumb-placeholder {
  display: grid;
  place-content: center;
  gap: 0.35rem;
  background:
    linear-gradient(135deg, rgba(8, 127, 155, 0.18), rgba(231, 55, 79, 0.12)),
    #eef7fa;
  color: var(--gth-teal);
  text-align: center;
}

.video-thumb-placeholder span {
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0;
}

.video-thumb-placeholder strong {
  font-size: 0.95rem;
  line-height: 1.1;
}

.video-announcement-thumb.video-thumb-placeholder {
  width: clamp(8rem, 22vw, 15rem);
  flex: 0 0 clamp(8rem, 22vw, 15rem);
}

.video-frame {
  aspect-ratio: 16 / 9;
  background: #07171c;
}

.video-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.course-strip {
  position: relative;
  display: grid;
  min-height: 8rem;
  place-items: center;
  color: #fff;
  isolation: isolate;
  overflow: hidden;
}

.course-strip::before,
.course-strip::after {
  position: absolute;
  content: "";
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.24);
  z-index: -1;
}

.course-strip::before {
  width: 5rem;
  height: 5rem;
  right: -1.25rem;
  top: 1rem;
  animation: driftBubble 7s ease-in-out infinite alternate;
}

.course-strip::after {
  width: 3rem;
  height: 3rem;
  left: 1rem;
  bottom: -0.7rem;
  animation: driftBubble 6s 0.8s ease-in-out infinite alternate-reverse;
}

.course-strip span {
  font-size: 2rem;
  font-weight: 900;
}

.course-strip-primary {
  background: linear-gradient(145deg, var(--gth-teal), var(--gth-cyan));
}

.course-strip-coral {
  background: linear-gradient(145deg, var(--gth-coral), #f27466);
}

.course-strip-sand {
  background: linear-gradient(145deg, #f4b75e, var(--gth-sand));
  color: var(--gth-ink);
}

.progress {
  height: 0.55rem;
  background: #e8f0f3;
}

.progress-bar {
  background-color: var(--gth-teal);
  animation: progressFill 0.75s ease both;
  transform-origin: left center;
}

.bg-coral {
  background-color: var(--gth-coral) !important;
}

.bg-sand {
  background-color: #f1b450 !important;
}

.text-bg-success {
  background-color: #dff5ea !important;
  color: #0e6841 !important;
}

.text-bg-warning {
  background-color: var(--gth-cream) !important;
  color: #81510b !important;
}

.text-bg-info {
  background-color: #e8f6fa !important;
  color: var(--gth-teal) !important;
}

.avatar {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  flex: 0 0 2.5rem;
  place-items: center;
  border-radius: 50%;
  background: #e8f6fa;
  color: var(--gth-teal);
  font-size: 0.8rem;
  font-weight: 900;
}

.file-pill {
  display: inline-grid;
  width: 2.5rem;
  height: 2rem;
  flex: 0 0 2.5rem;
  place-items: center;
  border-radius: 0.4rem;
  background: #e8f6fa;
  color: var(--gth-teal);
  font-size: 0.75rem;
  font-weight: 900;
}

.bar-chart {
  display: flex;
  align-items: end;
  gap: 0.6rem;
  height: 8.5rem;
  padding: 0.75rem;
  border-radius: 0.5rem;
  background: #e8f6fa;
}

.bar-chart span {
  flex: 1;
  min-width: 1.2rem;
  border-radius: 0.4rem 0.4rem 0 0;
  background: linear-gradient(180deg, var(--gth-cyan), var(--gth-teal));
  animation: barGrow 0.65s ease both;
  transform-origin: bottom;
}

.form-check-input:checked {
  background-color: var(--gth-teal);
  border-color: var(--gth-teal);
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    linear-gradient(135deg, rgba(8, 127, 155, 0.12), rgba(231, 55, 79, 0.1)),
    var(--gth-bg);
}

.login-card {
  width: min(100%, 27rem);
  animation: riseIn 0.5s ease both;
}

.login-logo {
  width: 6rem;
  height: 6rem;
  object-fit: cover;
  border: 3px solid #e9f2f5;
  border-radius: 50%;
  animation: popIn 0.45s 0.08s ease both;
}

.classroom-card {
  overflow: hidden;
}

.classroom-card:hover .course-strip span {
  transform: scale(1.08);
}

.classroom-card .course-strip {
  min-height: 10rem;
}

#chatbox {
  display: grid;
  gap: 0.85rem;
  min-height: min(36rem, calc(100vh - 11rem));
  padding: 1rem;
  border-radius: 0.5rem;
  background:
    linear-gradient(135deg, rgba(232, 246, 250, 0.92), rgba(255, 255, 255, 0.96)),
    #fff;
  animation: riseIn 0.4s ease both;
}

#chatbox > .d-flex:first-child {
  align-items: center !important;
  padding: 0.85rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.5rem;
  background: #fff;
  box-shadow: 0 14px 34px rgba(12, 42, 51, 0.07);
}

#chatbox .form-label {
  width: min(100%, 18rem);
  padding: 0.75rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.5rem;
  background: #fff;
}

.chat-messages {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-height: 18rem;
  height: clamp(18rem, 45vh, 28rem);
  overflow-y: auto;
  padding: 1rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.5rem;
  background:
    radial-gradient(circle at top left, rgba(25, 168, 200, 0.12), transparent 18rem),
    #f8fbfc;
  scroll-behavior: smooth;
}

.chat-message {
  width: fit-content;
  max-width: min(78%, 34rem);
  padding: 0.7rem 0.85rem;
  border: 1px solid #dce9ed;
  border-radius: 0.5rem 0.5rem 0.5rem 0.15rem;
  background: #fff;
  box-shadow: 0 8px 22px rgba(12, 42, 51, 0.06);
  animation: chatIn 0.25s ease both;
}

.chat-message-own {
  align-self: flex-end;
  border-color: rgba(8, 127, 155, 0.18);
  border-radius: 0.5rem 0.5rem 0.15rem 0.5rem;
  background: linear-gradient(135deg, var(--gth-teal), var(--gth-cyan));
  color: #fff;
}

.chat-message-own small,
.chat-message-own .text-secondary {
  color: rgba(255, 255, 255, 0.78) !important;
}

.chat-empty {
  display: grid;
  min-height: 100%;
  place-items: center;
  padding: 2rem;
  border: 1px dashed #bfd9e1;
  border-radius: 0.5rem;
  background: rgba(255, 255, 255, 0.72);
  text-align: center;
}

.chat-form {
  align-items: center;
  padding: 0.75rem;
  border: 1px solid #d8e7ec;
  border-radius: 0.5rem;
  background: #fff;
  box-shadow: 0 14px 34px rgba(12, 42, 51, 0.07);
}

.chat-form .form-control {
  min-height: 2.75rem;
}

.meeting-link-card {
  position: relative;
  overflow: hidden;
}

.student-meeting-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  min-height: 8rem;
}

.student-meeting-content {
  min-width: 0;
}

.student-meeting-card .d-flex.flex-wrap {
  margin-bottom: 0.5rem !important;
}

.student-meeting-card h3 {
  font-size: 1.05rem;
}

.student-meeting-card .meeting-link-url {
  max-width: 54rem;
  margin-top: 0.75rem;
  margin-bottom: 0 !important;
}

.student-meeting-card .btn {
  min-width: 7.5rem;
}

.meeting-link-card::before {
  position: absolute;
  top: 0;
  left: -45%;
  width: 35%;
  height: 100%;
  content: "";
  background: linear-gradient(90deg, transparent, rgba(25, 168, 200, 0.13), transparent);
  transform: skewX(-18deg);
  transition: left 0.55s ease;
}

.meeting-link-card:hover::before,
.meeting-link-card:focus-within::before {
  left: 115%;
}

.chatbox-collapsed .chat-messages,
.chatbox-collapsed .chat-form,
.chatbox-collapsed .form-label {
  display: none !important;
}

.chatbox-collapsed {
  min-height: auto !important;
}

.course-strip span,
.badge,
.file-pill,
.avatar {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.badge:hover,
.file-pill:hover,
.avatar:hover {
  transform: translateY(-0.06rem);
}

.motion-reveal {
  opacity: 0;
  transform: translateY(1rem) scale(0.985);
}

.motion-reveal.motion-visible {
  animation: riseIn 0.55s cubic-bezier(0.2, 0.75, 0.25, 1) both;
}

.motion-visible:nth-child(2) {
  animation-delay: 0.05s;
}

.motion-visible:nth-child(3) {
  animation-delay: 0.1s;
}

.motion-visible:nth-child(4) {
  animation-delay: 0.15s;
}

@keyframes pageFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(1rem) scale(0.985);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-0.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes sectionIn {
  from {
    opacity: 0;
    transform: translateY(0.6rem) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes popIn {
  0% {
    opacity: 0;
    transform: scale(0.96);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes gentleFloat {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-0.4rem);
  }
}

@keyframes landingGlow {
  from {
    background-position: left top;
  }
  to {
    background-position: right bottom;
  }
}

@keyframes driftBubble {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-0.3rem, 0.25rem, 0);
  }
}

@keyframes progressFill {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@keyframes barGrow {
  from {
    transform: scaleY(0.2);
  }
  to {
    transform: scaleY(1);
  }
}

@keyframes chatIn {
  from {
    opacity: 0;
    transform: translateY(0.35rem) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

@media (max-width: 991.98px) {
  .section-menu-lock {
    overflow: hidden;
  }

  .navbar .container-fluid {
    gap: 0.6rem;
  }

  .navbar-brand {
    min-width: 0;
  }

  .navbar-brand .lh-sm {
    min-width: 0;
  }

  .navbar-brand strong,
  .navbar-brand small {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .brand-logo {
    width: 44px;
    height: 44px;
  }

  main.container-fluid {
    padding-top: 1rem !important;
  }

  .student-dashboard-shell {
    grid-template-columns: 1fr;
    gap: 0.85rem;
  }

  .section-menu-toggle {
    position: relative;
    z-index: 1041;
    display: inline-flex;
    width: fit-content;
    align-items: center;
    gap: 0.5rem;
    padding: 0.62rem 0.75rem;
    border: 1px solid #b8d7df;
    border-radius: 0.65rem;
    background:
      linear-gradient(135deg, var(--gth-teal), var(--gth-cyan)),
      var(--gth-teal);
    color: #fff;
    box-shadow: 0 10px 24px rgba(8, 127, 155, 0.18);
    font-weight: 850;
  }

  .section-menu-toggle:hover,
  .section-menu-toggle:focus-visible {
    transform: translateY(-0.08rem);
    box-shadow: 0 18px 38px rgba(8, 127, 155, 0.28);
  }

  .section-menu-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1039;
    display: block;
    pointer-events: none;
    background: rgba(12, 42, 51, 0);
    transition: background-color 0.22s ease;
  }

  .section-menu-backdrop.active {
    pointer-events: auto;
    background: rgba(12, 42, 51, 0.24);
  }

  .student-section-nav {
    position: fixed;
    top: 4.6rem;
    right: 1rem;
    left: 1rem;
    z-index: 1040;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-content: start;
    gap: 0.5rem;
    width: auto;
    max-height: min(24rem, calc(100dvh - 6rem));
    padding: 0.75rem;
    border-radius: 0.85rem;
    border-width: 1px;
    background:
      linear-gradient(180deg, #fff, #f3fbfd),
      #fff;
    overflow-y: auto;
    overscroll-behavior: contain;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    animation: none;
    box-shadow: 0 22px 55px rgba(12, 42, 51, 0.2);
    transform: translateY(-0.8rem) scale(0.98);
    transform-origin: top center;
    transition: opacity 0.2s ease, transform 0.22s ease, visibility 0.22s ease;
  }

  .student-section-nav.section-menu-open {
    visibility: visible;
    pointer-events: auto;
    opacity: 1;
    transform: translateY(0) scale(1);
  }

  .student-section-content > .student-section-card.card > .card-body {
    padding: 0.9rem;
  }

  .student-section-content > .student-section-card.row {
    padding: 0.65rem;
  }

  .assignment-form-column,
  .assignment-list-column {
    position: static;
  }

  .assignment-list-card {
    max-height: none;
  }

  #adminAssignments {
    max-height: none;
    overflow: visible;
  }

  .display-title {
    font-size: clamp(1.65rem, 9vw, 2.4rem);
  }

  .student-section-nav a {
    min-height: 2.85rem;
    justify-content: flex-start;
    padding: 0.7rem 0.75rem;
    text-align: left;
    white-space: normal;
  }

  .course-strip {
    min-height: 5.5rem;
  }

  .course-workspace {
    padding: 0.8rem;
  }

  .course-workspace-hero,
  .course-workspace-grid {
    grid-template-columns: 1fr;
  }

  .course-workspace-meta {
    justify-items: start;
  }

  .gradebook-course-header,
  .gradebook-row,
  .gradebook-grade-form {
    grid-template-columns: 1fr;
  }

  .gradebook-average {
    width: 100%;
  }

  .video-announcement-item {
    align-items: flex-start;
    gap: 0.75rem;
  }

  .video-announcement-thumb {
    width: 5.5rem;
    flex-basis: 5.5rem;
  }

  .video-announcement-thumb.video-thumb-placeholder {
    width: 5.5rem;
    flex-basis: 5.5rem;
  }

  .video-announcement-action {
    align-self: flex-start;
  }

  .student-meeting-card {
    grid-template-columns: 1fr;
  }

  .student-meeting-card .btn {
    width: fit-content;
  }

  #chatbox {
    min-height: auto;
    padding: 0.75rem;
  }

  #chatbox > .d-flex:first-child {
    align-items: flex-start !important;
    flex-direction: column;
  }

  #chatbox .form-label {
    width: 100%;
  }

  .chat-messages {
    height: min(55vh, 25rem);
    min-height: 18rem;
    padding: 0.75rem;
  }

  .chat-message {
    max-width: 90%;
  }

  .chat-form {
    flex-wrap: wrap;
  }

  .chat-form .form-control {
    flex: 1 1 12rem;
  }

  .chat-form .btn {
    flex: 1 0 6rem;
  }
}

@media (max-width: 575.98px) {
  .navbar .container-fluid {
    flex-wrap: nowrap;
  }

  .navbar-brand {
    gap: 0.55rem !important;
    max-width: calc(100% - 3.3rem);
  }

  .brand-logo {
    width: 38px;
    height: 38px;
  }

  .section-menu-toggle {
    padding: 0.6rem;
    justify-content: center;
  }

  .section-menu-toggle span:not(.section-menu-icon) {
    display: none;
  }

  .student-section-nav a {
    font-size: 0.88rem;
  }

  .student-section-nav {
    top: 4.25rem;
    right: 0.75rem;
    left: 0.75rem;
    grid-template-columns: 1fr;
    max-height: min(22rem, calc(100dvh - 5.25rem));
    padding: 0.6rem;
  }

  .student-section-card .card-body > .d-flex:first-child {
    gap: 0.65rem !important;
    padding-bottom: 0.7rem;
  }

  .announcement-item,
  .grade-tile,
  .assignment-upload-form {
    padding: 0.8rem;
  }

  .assignment-card-header {
    flex-direction: column;
  }

  .assignment-toggle {
    width: 100%;
    justify-content: space-between;
  }

  .assignment-review-row {
    grid-template-columns: 1fr;
  }

  .assignment-grade-form {
    grid-template-columns: 1fr;
  }

  .video-announcement-item {
    flex-direction: column;
  }

  .video-announcement-thumb {
    width: 100%;
    flex-basis: auto;
  }

  .video-announcement-thumb.video-thumb-placeholder {
    width: 100%;
    flex-basis: auto;
  }

  .video-announcement-action,
  .student-meeting-card .btn {
    width: 100%;
  }

  .course-module-item {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .chat-messages {
    height: min(52vh, 23rem);
    min-height: 16rem;
  }

  .chat-message {
    max-width: 96%;
  }
}