:root {
  --portal-blue: #24479d;
  --portal-blue-strong: #17347d;
  --portal-blue-soft: #eef4ff;
  --portal-border: #dbe4f0;
  --portal-text: #172033;
  --portal-muted: #64748b;
  --portal-bg: #f4f7fb;
  --portal-white: #ffffff;
}

body.portal-shell-active {
  margin: 0;
  min-width: 320px;
  background: var(--portal-bg);
  color: var(--portal-text);
}

.portal-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  background: var(--portal-bg);
}

.portal-shell-sidebar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-height: 100vh;
  padding: 20px 14px 18px;
  overflow-y: auto;
  background: var(--portal-blue);
  color: #fff;
  box-shadow: 5px 0 20px rgba(15, 23, 42, 0.08);
}

.portal-shell-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 2px 10px 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.portal-shell-brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 auto;
  border-radius: 12px;
  background: #fff;
  font-size: 1.35rem;
}

.portal-shell-brand-name,
.portal-shell-brand-context {
  margin: 0;
}

.portal-shell-brand-name {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.portal-shell-brand-context {
  margin-top: 3px;
  color: #dbeafe;
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1.35;
}

.portal-shell-nav {
  display: grid;
  gap: 7px;
  padding: 24px 0;
}

.portal-shell-nav-item {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  min-height: 48px;
  padding: 10px 12px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  color: #e7efff;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 900;
  text-align: left;
  cursor: pointer;
}

.portal-shell-nav-item:hover,
.portal-shell-nav-item:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  outline: none;
}

.portal-shell-nav-item-active {
  background: rgba(255, 255, 255, 0.17);
  color: #fff;
  box-shadow: inset 3px 0 0 #fff;
}

.portal-shell-nav-icon {
  display: grid;
  place-items: center;
  width: 28px;
  font-size: 1rem;
}

.portal-shell-nav-badge {
  min-width: 24px;
  padding: 3px 7px;
  border-radius: 999px;
  background: #f59e0b;
  color: #fff;
  font-size: 0.68rem;
  font-weight: 900;
  text-align: center;
}

.portal-shell-account {
  display: grid;
  gap: 9px;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.portal-shell-account-card {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 8px;
}

.portal-shell-avatar {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #fff;
  color: var(--portal-blue);
  font-weight: 900;
}

.portal-shell-account-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.portal-shell-account-copy strong {
  overflow: hidden;
  color: #fff;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.portal-shell-account-copy span {
  overflow: hidden;
  color: #dbeafe;
  font-size: 0.72rem;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.portal-shell-secondary-action,
.portal-shell-logout {
  min-height: 40px;
  padding: 8px 10px;
  border-radius: 10px;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 900;
  cursor: pointer;
}

.portal-shell-secondary-action {
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: transparent;
  color: #fff;
}

.portal-shell-secondary-action:hover,
.portal-shell-secondary-action:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  outline: none;
}

.portal-shell-logout {
  border: 0;
  background: rgba(15, 23, 42, 0.18);
  color: #e7efff;
}

.portal-shell-logout:hover,
.portal-shell-logout:focus-visible {
  background: rgba(15, 23, 42, 0.3);
  color: #fff;
  outline: none;
}

.portal-shell-main {
  min-width: 0;
}

.portal-shell-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 80px;
  padding: 12px 30px;
  border-bottom: 1px solid var(--portal-border);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
}

.portal-shell-title-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.portal-shell-role-context,
.portal-shell-title-wrap h1 {
  margin: 0;
}

.portal-shell-role-context {
  margin-bottom: 2px;
  color: var(--portal-muted);
  font-size: 0.7rem;
  font-weight: 900;
}

.portal-shell-title-wrap h1 {
  color: var(--portal-text);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  font-weight: 900;
}

.portal-shell-menu {
  display: none;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--portal-border);
  border-radius: 11px;
  background: #fff;
  color: var(--portal-blue);
  font: inherit;
  font-size: 1.2rem;
  cursor: pointer;
}

.portal-shell-topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.portal-shell-class-picker {
  display: flex !important;
  align-items: center;
  gap: 10px;
  color: var(--portal-muted) !important;
  font-size: 0.78rem !important;
  font-weight: 900 !important;
}

.portal-shell-class-picker select {
  min-width: 190px;
  min-height: 44px;
  padding: 8px 36px 8px 12px;
  border: 2px solid #bfdbfe;
  border-radius: 11px;
  background: #eff6ff;
  color: #1e3a8a;
  font: inherit;
  font-weight: 900;
}

.portal-shell-content {
  min-width: 0;
}

.portal-shell-scrim {
  display: none;
}

/* Existing role modules keep their workflows but no longer own visible product chrome. */
body.portal-shell-active .portal-shell-content > .teacher-portal,
body.portal-shell-active .portal-shell-content > .student-portal {
  display: block !important;
  min-height: 0 !important;
  background: transparent !important;
}

body.portal-shell-active .teacher-sidebar,
body.portal-shell-active .teacher-topbar,
body.portal-shell-active .student-topbar {
  display: none !important;
}

body.portal-shell-active .teacher-main,
body.portal-shell-active .student-main {
  min-width: 0 !important;
  width: 100% !important;
  max-width: none !important;
  margin: 0 !important;
}

body.portal-shell-active .teacher-content,
body.portal-shell-active .student-main {
  width: 100% !important;
  max-width: 1600px !important;
  margin: 0 auto !important;
  padding: 34px clamp(22px, 4vw, 60px) 54px !important;
}

body.portal-shell-active .student-main {
  display: grid;
  gap: 24px;
}

body.portal-shell-active .student-hero {
  margin: 0;
}

body.portal-shell-active .student-workspace-card,
body.portal-shell-active .student-profile-card {
  margin: 0;
}

body.portal-shell-active #app-upload-form.hidden,
body.portal-shell-active .phase2-list-section.hidden {
  display: none !important;
}

body.portal-shell-active .teacher-modal {
  z-index: 100;
}

body.portal-shell-active .teacher-table-app[role="button"] {
  cursor: pointer;
}

@media (max-width: 900px) {
  .portal-shell {
    display: block;
  }

  .portal-shell-sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(310px, calc(100vw - 46px));
    min-height: 100vh;
    transform: translateX(-105%);
    transition: transform 180ms ease;
  }

  .portal-shell-nav-open .portal-shell-sidebar {
    transform: translateX(0);
  }

  .portal-shell-scrim {
    position: fixed;
    inset: 0;
    z-index: 25;
    background: rgba(15, 23, 42, 0.48);
  }

  .portal-shell-nav-open .portal-shell-scrim {
    display: block;
  }

  .portal-shell-menu {
    display: grid;
  }

  .portal-shell-topbar {
    min-height: 70px;
    padding: 10px 16px;
  }

  .portal-shell-class-picker span {
    display: none;
  }

  .portal-shell-class-picker select {
    min-width: min(180px, 42vw);
  }

  body.portal-shell-active .teacher-content,
  body.portal-shell-active .student-main {
    padding: 24px 16px 42px !important;
  }
}

@media (max-width: 560px) {
  .portal-shell-topbar {
    align-items: flex-start;
  }

  .portal-shell-topbar-actions {
    align-self: center;
  }

  .portal-shell-role-context {
    display: none;
  }

  .portal-shell-title-wrap h1 {
    font-size: 1.05rem;
  }

  .portal-shell-class-picker select {
    min-width: 132px;
    max-width: 42vw;
  }
}