:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  background: #f5f5f7;
  color: #1d1d1f;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255,255,255,.95), rgba(245,245,247,.94) 35%, #f5f5f7),
    #f5f5f7;
}

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

.shell-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px max(32px, calc((100vw - 1120px) / 2));
  backdrop-filter: saturate(180%) blur(18px);
  background: rgba(255,255,255,.74);
  border-bottom: 1px solid rgba(0,0,0,.06);
}

.shell-nav strong {
  letter-spacing: .02em;
}

.shell-nav nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.shell-nav a {
  color: #515154;
  text-decoration: none;
  font-size: 14px;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 160ms ease, border-color 160ms ease;
}

.shell-nav a:hover,
.shell-nav a:focus-visible,
.shell-nav a.active {
  color: #0066cc;
  border-color: #0066cc;
}

.nav-logout {
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  background: #f5f5f7;
  color: #1d1d1f;
  border: 1px solid rgba(0,0,0,.08);
  font-size: 13px;
}

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 52px 32px 72px;
}

.hero {
  max-width: 840px;
  margin-bottom: 26px;
}

.hero p,
.section-head p {
  margin: 0 0 8px;
  color: #0066cc;
  font-weight: 700;
  letter-spacing: .04em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.04;
  letter-spacing: 0;
}

.session-status {
  display: inline-flex;
  align-items: center;
  margin-top: 22px;
  padding: 9px 13px;
  border-radius: 999px;
  background: #1d1d1f;
  color: white;
  font-size: 13px;
}

.panel,
.metric,
.resource-card {
  background: rgba(255,255,255,.88);
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 8px;
  box-shadow: 0 18px 50px rgba(0,0,0,.07);
}

.panel {
  padding: 28px;
  margin-top: 22px;
}

.admin-page {
  animation: admin-page-in 180ms ease both;
}

@keyframes admin-page-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 30px;
  align-items: center;
}

.login-panel h2,
.section-head h2 {
  margin: 0;
  font-size: 28px;
}

.login-panel p {
  margin: 10px 0 0;
  color: #6e6e73;
  line-height: 1.7;
}

.login-form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: #515154;
  font-size: 14px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.check-row input {
  width: auto;
}

input,
textarea,
select {
  width: 100%;
  padding: 12px 13px;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,.14);
  background: #fff;
  outline: none;
}

textarea {
  min-height: 94px;
  resize: vertical;
  line-height: 1.6;
}

input:focus,
textarea:focus,
select:focus {
  border-color: #0071e3;
  box-shadow: 0 0 0 4px rgba(0,113,227,.12);
}

button,
.file-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: #0071e3;
  color: #fff;
  cursor: pointer;
  text-decoration: none;
}

.ghost-button {
  background: #f5f5f7;
  color: #1d1d1f;
  border: 1px solid rgba(0,0,0,.08);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  padding: 22px;
}

.metric span,
.metric small {
  display: block;
  color: #6e6e73;
}

.metric strong {
  display: block;
  margin: 10px 0 5px;
  font-size: 42px;
  letter-spacing: 0;
}

.admin-hub {
  margin-top: 22px;
}

.admin-entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.admin-entry-card {
  display: grid;
  align-content: start;
  gap: 8px;
  min-height: 128px;
  padding: 18px;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 8px;
  background: #fbfbfd;
  color: #1d1d1f;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.admin-entry-card:hover,
.admin-entry-card:focus-visible {
  border-color: rgba(0,113,227,.28);
  box-shadow: 0 14px 34px rgba(0,0,0,.08);
  transform: translateY(-1px);
  outline: none;
}

.admin-entry-card strong {
  font-size: 17px;
}

.admin-entry-card span {
  color: #6e6e73;
  line-height: 1.55;
}

.section-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.sub-section-head {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid rgba(0,0,0,.08);
}

.module-note {
  margin: -4px 0 18px;
  padding: 13px 15px;
  border: 1px solid rgba(0,113,227,.14);
  border-radius: 8px;
  background: #f5fbff;
  color: #515154;
  line-height: 1.7;
}

.resource-list {
  display: grid;
  gap: 12px;
}

.course-group {
  display: grid;
  gap: 10px;
}

.course-group + .course-group {
  margin-top: 18px;
}

.course-group-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  color: #1d1d1f;
}

.course-group-title h3 {
  margin: 0;
  font-size: 18px;
}

.course-group-title span {
  color: #6e6e73;
  font-size: 13px;
}

.resource-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 18px;
  box-shadow: none;
}

.resource-card strong {
  font-size: 17px;
}

.resource-card p {
  margin: 7px 0;
  color: #515154;
  line-height: 1.55;
}

.resource-card small {
  color: #86868b;
}

.resource-actions {
  display: flex;
  gap: 10px;
}

.resource-actions button {
  min-height: 34px;
  padding: 0 13px;
  font-size: 13px;
}

.resource-actions .danger {
  background: #fff1f1;
  color: #b42318;
}

.grant-resource-card {
  border-left: 4px solid #0071e3;
}

.grant-resource-card small {
  display: block;
  margin-top: 7px;
}

.user-form,
.department-form {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr)) auto auto;
  gap: 12px;
  align-items: end;
}

.department-form {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr) auto auto;
}

.user-list,
.department-list,
.audit-list,
.backup-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.user-card,
.department-card,
.audit-card,
.backup-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 16px;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,.08);
  background: #fbfbfd;
}

.user-card strong,
.department-card strong,
.audit-card strong,
.backup-card strong,
.grant-title {
  display: block;
  color: #1d1d1f;
}

.user-card p,
.department-card p,
.audit-card p,
.backup-card p {
  margin: 6px 0 0;
  color: #6e6e73;
}

.maintenance-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.maintenance-metric {
  padding: 16px;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,.08);
  background: #fbfbfd;
}

.maintenance-metric span,
.maintenance-metric small {
  display: block;
  color: #6e6e73;
}

.maintenance-metric strong {
  display: block;
  margin: 8px 0 4px;
  font-size: 26px;
  letter-spacing: 0;
}

.backup-actions {
  display: flex;
  gap: 10px;
}

.audit-card small {
  display: block;
  margin-top: 7px;
  color: #86868b;
  line-height: 1.55;
}

.audit-badge {
  min-width: 86px;
  padding: 7px 10px;
  border-radius: 999px;
  background: #f5f5f7;
  color: #515154;
  font-size: 12px;
  text-align: center;
}

.user-card.inactive {
  opacity: .62;
}

.department-card-actions {
  display: flex;
  gap: 10px;
}

.department-card-actions .danger {
  background: #fff1f1;
  color: #b42318;
}

.grant-editor {
  display: grid;
  gap: 12px;
}

.grant-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.grant-two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.grant-two-column section {
  padding: 18px;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,.08);
  background: #fbfbfd;
}

.grant-two-column h3 {
  margin: 0 0 14px;
  font-size: 18px;
}

.grant-panel {
  max-width: 980px;
}

.grant-item {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 10px 12px;
  border: 1px solid rgba(0,0,0,.08);
  border-radius: 8px;
  background: #fff;
}

.grant-item input {
  width: auto;
}

.grant-item small {
  display: block;
  color: #86868b;
  font-size: 12px;
}

.readonly-note {
  margin: 0;
  padding: 12px 14px;
  color: #515154;
  border-radius: 8px;
  background: #f5f5f7;
}

.editor-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  overflow: auto;
  padding: 42px 24px;
  background: rgba(245,245,247,.78);
  backdrop-filter: blur(18px);
}

.editor-panel {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px;
  border-radius: 12px;
  background: rgba(255,255,255,.94);
  border: 1px solid rgba(0,0,0,.08);
  box-shadow: 0 24px 80px rgba(0,0,0,.18);
}

.editor-head,
.editor-footer {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.editor-head p {
  margin: 0 0 8px;
  color: #0066cc;
  font-weight: 700;
}

.editor-head h2 {
  margin: 0;
  font-size: 30px;
}

.editor-form {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.editor-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.editor-grid .wide {
  grid-column: 1 / -1;
}

.entry-editor-list {
  display: grid;
  gap: 14px;
  max-height: 58vh;
  overflow: auto;
  padding-right: 4px;
}

.entry-editor-card {
  display: grid;
  gap: 14px;
  padding: 18px;
  border-radius: 8px;
  border: 1px solid rgba(0,0,0,.08);
  background: #fbfbfd;
}

.entry-editor-card h3 {
  margin: 0;
  font-size: 18px;
}

.entry-editor-grid {
  display: grid;
  grid-template-columns: minmax(110px, .7fr) minmax(90px, .5fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
}

.entry-editor-card .wide {
  grid-column: 1 / -1;
}

.student-editor-grid {
  display: grid;
  grid-template-columns: minmax(130px, .6fr) minmax(0, 1fr);
  gap: 12px;
}

.editor-note {
  margin: 0;
  color: #6e6e73;
  line-height: 1.7;
}

.empty {
  padding: 22px;
  color: #6e6e73;
  border: 1px dashed rgba(0,0,0,.16);
  border-radius: 8px;
  background: rgba(255,255,255,.55);
}

@media (max-width: 820px) {
  .login-panel,
  .metric-grid,
  .admin-entry-grid,
    .resource-card,
    .user-form,
    .user-card,
    .audit-card,
    .backup-card,
    .maintenance-grid,
    .grant-grid,
  .editor-grid,
  .entry-editor-grid,
  .student-editor-grid {
    grid-template-columns: 1fr;
  }
  .shell-nav,
  .section-head,
  .editor-head,
  .editor-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}