@layer reset, tokens, base, layout, components, states, responsive, print, utilities;

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    height: 100%;
  }

  body {
    min-height: 100%;
  }

  button,
  input,
  optgroup,
  select,
  textarea {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    color: inherit;
    margin: 0;
  }

  button,
  a,
  select,
  input,
  label {
    touch-action: manipulation;
  }

  table {
    border-collapse: collapse;
    border-spacing: 0;
  }

  ul,
  ol {
    list-style: none;
  }

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

@layer tokens {
  :root {
    --gray-0: #ffffff;
    --gray-50: #f7f8fa;
    --gray-100: #eef0f4;
    --gray-200: #e0e3ea;
    --gray-300: #c9cdd7;
    --gray-400: #969ba7;
    --gray-500: #6b7180;
    --gray-700: #3b414d;
    --gray-800: #232830;
    --gray-900: #12161c;
    --gray-950: #080a0e;

    --blue-600: #1a4fb4;
    --blue-400: #8ab4ff;

    --red-500: #c1121f;
    --red-400: #ff7a70;
    --red-600: #96101a;

    color-scheme: light dark;

    --color-text: var(--gray-900);
    --color-text-muted: var(--gray-500);
    --color-bg: var(--gray-0);
    --color-surface-hover: var(--gray-100);
    --color-control-active-hover: var(--gray-800);
    --color-link: var(--blue-600);
    --color-rule: var(--gray-200);
    --color-rule-strong: var(--gray-900);
    --color-field-border: var(--gray-300);
    --color-accent-now: var(--red-500);
    --color-bound-event: var(--red-600);

    --font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-md: 1.125rem;
    --text-lg: 1.25rem;
    --text-xl: 1.5rem;
    --text-2xl: 1.875rem;

    --leading-tight: 1.25;
    --leading-normal: 1.5;

    --weight-normal: 400;
    --weight-medium: 500;
    --weight-bold: 600;

    --space-3xs: 0.125rem;
    --space-2xs: 0.25rem;
    --space-xs: 0.375rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 2.5rem;

    --page-max-width: 60rem;
    --calendar-max-width: 90rem;
    --page-gutter: var(--space-md);
    --measure: 70ch;
    --page-margin-inline: auto;

    --control-height: 2.75rem;
    --control-padding-inline: var(--space-md);
    --min-touch-target: 2.75rem;
    --rule-width: 1px;
    --radius: 0;
    --radius-control: 0.375rem;
    --focus-ring-width: 2px;
    --width-grade-input: 5.5rem;
    --width-event-time: 8rem;
    --opacity-disabled: 0.5;
    --toggle-arrow-size: 0.45em;
    --toggle-arrow-width: 2px;
    --burger-bar-thickness: 2px;
    --burger-bar-width: 1.25rem;
    --burger-gap: var(--space-2xs);
    --burger-translate-y: calc(var(--burger-gap) + var(--burger-bar-thickness));
    --header-height-mobile: 6rem;
    --visually-hidden-size: 1px;
    --z-overlay: 1000;
    --z-header: 1001;

    --transition-fast: 0.15s ease;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --color-text: var(--gray-100);
      --color-text-muted: var(--gray-400);
      --color-bg: var(--gray-950);
      --color-surface-hover: var(--gray-800);
      --color-control-active-hover: var(--gray-200);
      --color-link: var(--blue-400);
      --color-rule: var(--gray-800);
      --color-rule-strong: var(--gray-100);
      --color-field-border: var(--gray-700);
      --color-accent-now: var(--red-400);
      --color-bound-event: var(--red-400);
    }
  }
}

@layer base {
  html {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
  }

  body {
    font-family: var(--font-family);
    font-size: var(--text-base);
    font-weight: var(--weight-normal);
    line-height: var(--leading-normal);
    background-color: var(--color-bg);
    color: var(--color-text);
    overflow-wrap: break-word;
  }

  h1,
  h2,
  h3,
  h4,
  h5,
  h6 {
    color: var(--color-text);
    line-height: var(--leading-tight);
    overflow-wrap: break-word;
  }

  h1 {
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    margin-block-start: var(--space-md);
    margin-block-end: var(--space-xs);
  }

  h2 {
    font-size: var(--text-xl);
    font-weight: var(--weight-medium);
    margin-block-start: var(--space-xl);
    margin-block-end: var(--space-xs);
  }

  h3 {
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    margin-block-start: var(--space-lg);
    margin-block-end: var(--space-xs);
  }

  h1:first-child {
    margin-block-start: 0;
  }

  p {
    margin-block-end: var(--space-md);
  }

  p:last-child {
    margin-block-end: 0;
  }

  a {
    color: var(--color-link);
    text-decoration: underline;
    text-underline-offset: var(--space-3xs);
  }

  table {
    width: 100%;
    margin-block-end: var(--space-lg);
  }

  th,
  td {
    text-align: left;
    vertical-align: top;
    padding-block: var(--space-sm);
    padding-inline: var(--space-md);
    border-block-end: var(--rule-width) solid var(--color-rule);
    font-size: var(--text-sm);
  }

  th {
    font-weight: var(--weight-bold);
  }

  input,
  select,
  button {
    font-size: var(--text-base);
    border-radius: var(--radius);
  }

  input[type="checkbox"],
  input[type="radio"] {
    accent-color: var(--color-text);
  }

  hr {
    border: none;
    border-block-start: var(--rule-width) solid var(--color-rule);
    margin-block: var(--space-md);
  }
}

@layer layout {
  .site-header,
  .page-container,
  .site-footer {
    width: 100%;
    max-width: var(--page-max-width);
    margin-inline: var(--page-margin-inline);
    padding-inline: var(--page-gutter);
    box-sizing: border-box;
  }

  .page-container-wide {
    max-width: var(--calendar-max-width);
    display: grid;
    grid-template-columns:
      [full-start] minmax(0, 1fr)
      [content-start] min(100%, calc(var(--page-max-width) - 2 * var(--page-gutter))) [content-end]
      minmax(0, 1fr) [full-end];
  }

  .page-container-wide > * {
    grid-column: content;
  }

  .page-container-wide > h1 {
    margin-block-start: calc(var(--space-md) - var(--space-sm));
  }

  .page-container-wide > .collapsible-heading {
    margin-block-start: calc(var(--space-xl) - var(--space-xs));
  }

  .page-container-wide > .calendar-view-container.calendar-view-week {
    grid-column: full;
  }

  .page-container-wide > .calendar-view-container.calendar-view-week:has(> .empty-state-message) {
    grid-column: content;
  }

  .site-main p {
    max-width: var(--measure);
  }
}

@layer components {
  .site-header {
    border-block-end: var(--rule-width) solid var(--color-rule);
    padding-block-start: var(--space-md);
    padding-block-end: var(--space-sm);
    margin-block-end: var(--space-lg);
  }

  .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-xs);
  }

  .header-titles {
    display: flex;
    flex-direction: column;
    min-width: 0;
    flex-grow: 1;
  }

  .site-title {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    line-height: var(--leading-tight);
    color: var(--color-text);
  }

  .site-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: var(--leading-normal);
    margin-block-start: var(--space-3xs);
  }

  .section-nav {
    margin-block-end: var(--space-md);
  }

  .nav-menu {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
  }

  .section-nav a:not(.nav-external) {
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--weight-normal);
    padding-block: var(--space-xs);
    border-block-end: var(--rule-width) solid transparent;
  }

  .section-nav a.nav-active,
  .section-nav a[aria-current="page"] {
    font-weight: var(--weight-bold);
    color: var(--color-text);
    text-decoration: none;
    border-block-end: var(--focus-ring-width) solid var(--color-rule-strong);
  }

  a.nav-external {
    color: var(--color-link);
    text-decoration: underline;
  }

  .nav-toggle {
    display: none;
  }

  .burger-bar {
    display: block;
    width: var(--burger-bar-width);
    height: var(--burger-bar-thickness);
    background-color: var(--color-text);
    border-radius: var(--radius);
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    transform-origin: center;
  }

  .back-navigation {
    margin-block-end: var(--space-sm);
  }

  .back-navigation a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--text-sm);
    display: inline-flex;
    align-items: center;
  }

  .collapsible-heading {
    display: flex;
    align-items: baseline;
    gap: var(--space-2xs);
  }

  .heading-toggle-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    padding: var(--space-3xs);
    border-radius: var(--radius);
    margin: 0;
  }

  .heading-toggle-btn::before {
    content: "";
    position: absolute;
    min-width: var(--min-touch-target);
    min-height: var(--min-touch-target);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .toggle-arrow {
    display: inline-block;
    width: var(--toggle-arrow-size);
    height: var(--toggle-arrow-size);
    border-inline-end: var(--toggle-arrow-width) solid currentColor;
    border-block-end: var(--toggle-arrow-width) solid currentColor;
    transform: rotate(45deg);
    transform-origin: center;
    transition: transform var(--transition-fast);
    vertical-align: middle;
  }

  .toggle-arrow.is-collapsed {
    transform: rotate(-45deg);
  }

  #filters-container {
    margin-block-end: var(--space-lg);
  }

  .filter-form {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    row-gap: var(--space-md);
    column-gap: var(--space-lg);
    width: 100%;
    border-block-end: var(--rule-width) solid var(--color-rule);
    padding-block-end: var(--space-md);
    margin-block-end: var(--space-lg);
    box-sizing: border-box;
  }

  .filter-group,
  .filter-group-checkboxes {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    flex-wrap: wrap;
  }

  .filter-group-item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    flex-shrink: 0;
  }

  #cal-comp-checkboxes {
    display: contents;
  }

  label:not(:has(input)),
  .filter-form span {
    font-size: var(--text-xs);
    font-weight: var(--weight-normal);
    color: var(--color-text-muted);
    cursor: default;
    user-select: none;
  }

  label:has(input) {
    position: relative;
  }

  label:has(input),
  .filter-form select,
  .filter-form input[type="text"],
  .filter-form input[type="date"],
  .filter-form button,
  .calendar-nav-bar button,
  .grades-actions button,
  .grade-input {
    height: var(--control-height);
    min-height: var(--min-touch-target);
    padding-block: 0;
    padding-inline: var(--control-padding-inline);
    border: var(--rule-width) solid var(--color-field-border);
    border-radius: var(--radius-control);
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    box-sizing: border-box;
    vertical-align: middle;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  }

  label:has(input),
  .filter-form button,
  .calendar-nav-bar button,
  .grades-actions button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    user-select: none;
  }

  .filter-form select {
    display: inline-block;
    cursor: pointer;
  }

  .filter-form input[type="text"] {
    display: inline-block;
  }

  .filter-form input[type="text"]::placeholder {
    color: var(--color-text-muted);
    opacity: 1;
  }

  .filter-form input[type="date"] {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    appearance: none;
    -webkit-appearance: none;
    position: relative;
    max-width: 100%;
    cursor: pointer;
    line-height: calc(var(--control-height) - 2 * var(--rule-width));
  }

  .filter-form input[type="date"]::-webkit-date-and-time-value {
    text-align: left;
    padding: 0;
    margin: 0;
    min-height: 1.5em;
    height: 100%;
    display: flex;
    align-items: center;
  }

  .filter-form input[type="date"]::-webkit-calendar-picker-indicator {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
  }

  .filter-group-reset button {
    border-color: transparent;
    background-color: transparent;
    color: var(--color-text-muted);
    font-weight: var(--weight-normal);
  }

  .results-count {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    font-weight: var(--weight-normal);
    margin-inline-start: auto;
  }

  @supports selector(:has(*)) {
    label:has(input) > input {
      position: absolute;
      width: var(--visually-hidden-size);
      height: var(--visually-hidden-size);
      padding: 0;
      margin: 0;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      border: 0;
    }
  }

  .filter-group:has(input[type="radio"]) {
    gap: 0;
  }

  .filter-group:has(input[type="radio"]) > label:not(:has(input)),
  .filter-group:has(input[type="radio"]) > span {
    margin-inline-end: var(--space-xs);
  }

  label:has(input[type="radio"]) {
    border-radius: 0;
    border-inline-end-width: 0;
  }

  label:has(input[type="radio"]):first-of-type {
    border-start-start-radius: var(--radius-control);
    border-end-start-radius: var(--radius-control);
  }

  label:has(input[type="radio"]):last-of-type {
    border-inline-end-width: var(--rule-width);
    border-start-end-radius: var(--radius-control);
    border-end-end-radius: var(--radius-control);
  }

  .calendar-nav-bar {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: var(--space-md);
    width: 100%;
    border-block-end: var(--rule-width) solid var(--color-rule);
    padding-block-end: var(--space-md);
    margin-block-end: var(--space-lg);
    box-sizing: border-box;
    flex-wrap: wrap;
  }

  #cal-today-btn {
    flex-shrink: 0;
  }

  .cal-nav-center {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }

  .cal-period-heading {
    font-size: var(--text-md);
    font-weight: var(--weight-bold);
    font-variant-numeric: tabular-nums;
    text-align: center;
    margin: 0;
  }

  .btn-text {
    display: inline;
  }

  .btn-symbol {
    display: none;
  }

  .calendar-view-week {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--space-md);
    align-items: start;
  }

  .calendar-view-week:has(> .empty-state-message) {
    display: block;
  }

  .calendar-view-week .day-section {
    border-inline-start: var(--rule-width) solid var(--color-rule);
    padding-inline-start: var(--space-md);
    min-width: 0;
    margin-block-end: 0;
  }

  .calendar-view-week .day-section:first-child {
    border-inline-start: none;
    padding-inline-start: 0;
  }

  .calendar-view-week .day-section h3 {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    border-block-end: var(--rule-width) solid var(--color-rule);
    padding-block-end: var(--space-2xs);
    margin-block-end: var(--space-sm);
    margin-block-start: 0;
    overflow-wrap: anywhere;
  }

  .day-section {
    margin-block-end: var(--space-xl);
  }

  .day-section h3 {
    font-size: var(--text-md);
    font-weight: var(--weight-bold);
    margin-block-start: var(--space-md);
    margin-block-end: var(--space-sm);
    color: var(--color-text);
  }

  .calendar-events-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-block-end: var(--space-md);
  }

  .calendar-event-item {
    display: flex;
    gap: var(--space-md);
    padding-block-end: var(--space-xs);
    border-block-end: var(--rule-width) solid var(--color-rule);
    min-width: 0;
  }

  .event-time-start.is-day-start,
  .event-time-end.is-day-end {
    color: var(--color-bound-event);
    font-weight: var(--weight-bold);
  }

  .calendar-view-week .calendar-event-item {
    flex-direction: column;
    gap: var(--space-3xs);
  }

  .event-time {
    font-variant-numeric: tabular-nums;
    width: var(--width-event-time);
    flex-shrink: 0;
    font-size: var(--text-base);
    color: var(--color-text-muted);
  }

  .calendar-view-week .event-time {
    width: 100%;
    font-size: var(--text-sm);
  }

  .event-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-3xs);
    flex-grow: 1;
    min-width: 0;
  }

  .event-title {
    font-weight: var(--weight-medium);
    font-size: var(--text-base);
    overflow-wrap: anywhere;
  }

  .calendar-view-week .event-title {
    font-size: var(--text-sm);
  }

  .event-teachers,
  .event-rooms,
  .event-groups {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    overflow-wrap: anywhere;
  }

  .calendar-view-week .event-teachers,
  .calendar-view-week .event-rooms,
  .calendar-view-week .event-groups {
    font-size: var(--text-xs);
  }

  .current-time-marker {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-block: var(--space-xs);
    color: var(--color-accent-now);
    font-weight: var(--weight-bold);
    font-variant-numeric: tabular-nums;
    font-size: var(--text-xs);
    width: 100%;
  }

  .current-time-line {
    flex-grow: 1;
    border: none;
    border-block-start: var(--rule-width) solid var(--color-accent-now);
    margin: 0;
  }

  .cal-day-summary {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    margin-block-end: var(--space-sm);
  }

  .cal-summary-primary,
  .cal-summary-compared {
    margin-block-end: var(--space-3xs);
  }

  .cal-class-subheading {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    margin-block-start: var(--space-sm);
    margin-block-end: var(--space-xs);
    color: var(--color-text);
  }

  .calendar-view-week .cal-class-subheading {
    font-size: var(--text-xs);
    margin-block-start: var(--space-xs);
    margin-block-end: var(--space-2xs);
  }

  .year-month-title {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-block-start: var(--space-2xl);
    margin-block-end: var(--space-md);
    border-block-end: var(--rule-width) solid var(--color-rule-strong);
    padding-block-end: var(--space-2xs);
  }

  thead th {
    border-block-end-color: var(--color-rule-strong);
    vertical-align: bottom;
  }

  .col-date,
  .col-time {
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
  }

  .col-action {
    text-align: right;
  }

  .col-ue-header,
  .col-ue-cell {
    text-align: center;
    font-variant-numeric: tabular-nums;
  }

  .col-grade-input {
    text-align: right;
  }

  .col-s5-avg,
  .col-s6-avg,
  .col-annual-avg {
    text-align: right;
    font-variant-numeric: tabular-nums;
  }

  .month-row th,
  .program-row th {
    border-block-start: var(--rule-width) solid var(--color-rule-strong);
    padding-block-start: var(--space-md);
    padding-block-end: var(--space-xs);
    font-size: var(--text-md);
  }

  .semester-average-row td {
    border-block-start: var(--rule-width) solid var(--color-rule-strong);
    font-weight: var(--weight-bold);
    padding-block: var(--space-md);
  }

  .annual-global-container {
    margin-block-start: var(--space-xl);
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    border-block-start: var(--rule-width) solid var(--color-rule-strong);
    padding-block-start: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
  }

  a.detail-link {
    color: var(--color-text);
    text-decoration: underline;
  }

  .category-badge,
  .badge-past,
  .match-badge,
  .match-same,
  .room-tag {
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    color: var(--color-text-muted);
  }

  .ongoing-badge {
    color: var(--color-accent-now);
    font-weight: var(--weight-bold);
    font-size: var(--text-xs);
    margin-inline-start: var(--space-xs);
  }

  .grades-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-block-end: var(--space-md);
  }

  .grade-input {
    width: var(--width-grade-input);
    text-align: right;
    font-variant-numeric: tabular-nums;
  }

  .grade-input[aria-invalid="true"] {
    font-weight: var(--weight-bold);
  }

  .noscript-notice,
  .privacy-notice,
  .empty-state-message,
  .comparison-note {
    padding-block: var(--space-sm);
    padding-inline: var(--space-md);
    border-inline-start: var(--rule-width) solid var(--color-rule);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-block-end: var(--space-md);
    overflow-wrap: break-word;
  }

  .grades-message {
    padding-block: var(--space-sm);
    padding-inline: var(--space-md);
    border-inline-start: var(--rule-width) solid var(--color-rule);
    font-size: var(--text-sm);
    color: var(--color-text);
    margin-block-end: var(--space-md);
    overflow-wrap: break-word;
  }

  .empty-state-message {
    padding-block: var(--space-lg);
    margin-block: var(--space-md);
  }

  .main-chamilo-link {
    margin-block-end: var(--space-md);
    font-size: var(--text-base);
  }

  .program-section {
    margin-block-end: var(--space-xl);
  }

  .class-list {
    display: flex;
    flex-direction: column;
    border-block-start: var(--rule-width) solid var(--color-rule);
    margin-block-end: var(--space-lg);
  }

  .class-list li {
    border-block-end: var(--rule-width) solid var(--color-rule);
  }

  .class-list a {
    display: flex;
    align-items: center;
    min-height: var(--min-touch-target);
    padding-block: var(--space-xs);
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--weight-medium);
    width: 100%;
  }

  .class-sections-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-block-end: var(--space-lg);
  }

  .section-item {
    line-height: var(--leading-normal);
  }

  .section-item a:not(.nav-external) {
    color: var(--color-text);
    text-decoration: none;
  }

  .section-desc {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
  }

  .global-sections-nav {
    margin-block-start: var(--space-2xl);
    border-block-start: var(--rule-width) solid var(--color-rule);
    padding-block-start: var(--space-md);
  }

  .global-sections-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--weight-medium);
    display: inline-flex;
    align-items: center;
    min-height: var(--min-touch-target);
  }

  .resource-list {
    list-style: disc;
    padding-inline-start: var(--space-lg);
    margin-block-end: var(--space-lg);
  }

  .resource-list li {
    margin-block-end: var(--space-xs);
    line-height: var(--leading-normal);
  }

  .visually-hidden {
    position: absolute;
    width: var(--visually-hidden-size);
    height: var(--visually-hidden-size);
    padding: 0;
    margin: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
  }

  .site-footer {
    border-block-start: var(--rule-width) solid var(--color-rule);
    padding-block-start: var(--space-md);
    padding-block-end: var(--space-xl);
    margin-block-start: var(--space-2xl);
    color: var(--color-text-muted);
    font-size: var(--text-xs);
  }

  .footer-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
}

@layer states {
  *:focus {
    outline: none;
  }

  @media (pointer: fine) {
    *:focus-visible,
    label:has(input:focus-visible) {
      outline: var(--focus-ring-width) solid var(--color-link);
      outline-offset: var(--focus-ring-width);
    }

    label:has(input) > input:focus-visible {
      outline: none;
    }
  }

  label:has(input:checked) {
    background-color: var(--color-text);
    color: var(--color-bg);
    border-color: var(--color-text);
  }

  label:has(input[type="radio"]:checked) + label:has(input[type="radio"]) {
    border-inline-start-color: var(--color-text);
  }

  @media (hover: hover) and (pointer: fine) {
    a:hover {
      text-decoration-thickness: var(--focus-ring-width);
      text-decoration-color: currentColor;
    }

    .section-nav a:not(.nav-external):not(.nav-active):hover {
      color: var(--color-text);
      border-block-end-color: var(--color-rule-strong);
    }

    .back-navigation a:hover,
    .class-list a:hover,
    .global-sections-nav a:hover,
    .class-sections-list a:not(.nav-external):hover {
      text-decoration: underline;
      text-decoration-thickness: var(--focus-ring-width);
    }

    .heading-toggle-btn:hover {
      background-color: var(--color-surface-hover);
    }

    button:hover:not(:disabled),
    select:hover:not(:disabled),
    input[type="text"]:hover:not(:disabled),
    input[type="date"]:hover:not(:disabled),
    label:has(input:not(:checked)):hover {
      background-color: var(--color-surface-hover);
    }

    .filter-group-reset button:hover {
      color: var(--color-text);
    }

    label:has(input:checked):hover {
      background-color: var(--color-control-active-hover);
      border-color: var(--color-control-active-hover);
    }

    tbody tr:not(.month-row):not(.program-row):hover {
      background-color: var(--color-surface-hover);
    }
  }

  button:active:not(:disabled),
  label:has(input):not(:has(input:checked)):active {
    background-color: var(--color-surface-hover);
  }

  .heading-toggle-btn:active {
    background-color: var(--color-surface-hover);
  }

  .nav-toggle:active {
    background-color: var(--color-surface-hover);
  }

  .class-list a:active {
    text-decoration: underline;
    text-decoration-thickness: var(--focus-ring-width);
  }

  .section-nav a:not(.nav-external):not(.nav-active):active {
    color: var(--color-text);
    border-block-end-color: var(--color-rule-strong);
  }

  button:disabled,
  input:disabled,
  select:disabled {
    opacity: var(--opacity-disabled);
    cursor: not-allowed;
  }

  [aria-invalid="true"] {
    border-width: var(--focus-ring-width);
    border-color: var(--color-accent-now);
  }

  @media (prefers-reduced-motion: reduce) {
    .toggle-arrow,
    .burger-bar,
    label:has(input),
    button,
    select,
    input {
      transition: none;
    }
  }
}

@layer responsive {
  @media (max-width: 59.99em) {
    .site-header {
      position: relative;
      z-index: var(--z-header);
      background-color: var(--color-bg);
    }

    .subtitle-sep {
      display: none;
    }

    .subtitle-unofficial {
      display: block;
    }

    .nav-toggle {
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: var(--burger-gap);
      width: var(--min-touch-target);
      height: var(--control-height);
      padding: 0;
      border: var(--rule-width) solid var(--color-field-border);
      border-radius: var(--radius-control);
      background-color: var(--color-bg);
      cursor: pointer;
      flex-shrink: 0;
    }

    .nav-toggle[aria-expanded="true"] .burger-bar:first-child {
      transform: translateY(var(--burger-translate-y)) rotate(45deg);
    }

    .nav-toggle[aria-expanded="true"] .burger-bar:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle[aria-expanded="true"] .burger-bar:last-child {
      transform: translateY(calc(var(--burger-translate-y) * -1)) rotate(-45deg);
    }

    body:has(.nav-toggle[aria-expanded="true"]),
    body:has(.nav-menu.nav-open) {
      overflow: hidden;
      touch-action: none;
    }

    .nav-menu {
      display: none;
    }

    .nav-menu.nav-open {
      display: flex;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: var(--color-bg);
      z-index: var(--z-overlay);
      flex-direction: column;
      justify-content: center;
      align-items: center;
      text-align: center;
      padding-block-start: calc(var(--space-md) + var(--header-height-mobile));
      padding-block-end: var(--space-md);
      padding-inline: var(--space-md);
      gap: var(--space-md);
      overflow-y: auto;
      overscroll-behavior: contain;
    }

    .nav-menu.nav-open a {
      font-size: var(--text-xl);
      padding-block: var(--space-sm);
    }

    .btn-text {
      display: none;
    }

    .btn-symbol {
      display: inline;
    }

    .calendar-nav-bar {
      display: flex;
      flex-direction: column;
      align-items: stretch;
      gap: var(--space-sm);
    }

    #cal-today-btn {
      order: 1;
      width: 100%;
      min-height: var(--min-touch-target);
    }

    .cal-nav-center {
      order: 2;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: var(--space-sm);
      width: 100%;
      justify-content: center;
    }

    .cal-period-heading {
      order: 1;
      width: 100%;
      text-align: center;
      margin-block: var(--space-xs);
    }

    #cal-prev-btn {
      flex: 1;
      min-height: var(--min-touch-target);
      order: 2;
    }

    #cal-next-btn {
      flex: 1;
      min-height: var(--min-touch-target);
      order: 3;
    }

    .calendar-view-week {
      grid-template-columns: 1fr;
      gap: var(--space-lg);
    }

    .calendar-view-week .day-section {
      border-inline-start: none;
      padding-inline-start: 0;
      border-block-end: var(--rule-width) solid var(--color-rule);
      padding-block-end: var(--space-md);
    }

    .calendar-view-week .day-section:last-child {
      border-block-end: none;
      padding-block-end: 0;
    }

    .calendar-view-week .day-section h3 {
      font-size: var(--text-md);
    }

    .calendar-view-week .event-time {
      font-size: var(--text-base);
    }

    .calendar-view-week .event-title {
      font-size: var(--text-base);
    }

    .calendar-view-week .event-teachers,
    .calendar-view-week .event-rooms,
    .calendar-view-week .event-groups {
      font-size: var(--text-sm);
    }

    .page-container-wide {
      display: block;
    }

    .page-container-wide > h1 {
      margin-block-start: var(--space-md);
    }

    .page-container-wide > .collapsible-heading {
      margin-block-start: var(--space-xl);
    }

    .filter-form {
      row-gap: var(--space-sm);
      column-gap: var(--space-md);
      width: 100%;
    }

    .filter-group {
      max-width: 100%;
      min-width: 0;
    }

    .filter-form input[type="text"],
    .filter-form input[type="date"],
    .filter-form select,
    .grade-input {
      font-size: var(--text-base);
    }

    .filter-group:has(input[type="text"]) {
      width: 100%;
    }

    .filter-form input[type="text"] {
      width: 100%;
    }

    .filter-group-scroll,
    .filter-group:has(.filter-group-checkboxes),
    .filter-group-checkboxes {
      width: 100%;
      max-width: 100%;
      min-width: 0;
      flex: 0 0 100%;
      contain: inline-size;
      display: flex;
      flex-wrap: nowrap;
      overflow-x: auto;
      overflow-y: hidden;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
      padding-block: var(--space-2xs);
      box-sizing: border-box;
    }

    .filter-group-scroll::-webkit-scrollbar,
    .filter-group-checkboxes::-webkit-scrollbar {
      display: none;
    }

    #cal-comp-checkboxes {
      display: contents;
    }

    .filter-group-scroll > *,
    .filter-group-checkboxes > * {
      flex-shrink: 0;
      white-space: nowrap;
    }

    .grades-actions {
      display: flex;
      flex-direction: row;
      flex-wrap: wrap;
      gap: var(--space-sm);
      width: 100%;
    }

    .grades-actions button {
      flex: 1 1 auto;
      text-align: center;
    }

    .grade-input {
      width: var(--width-grade-input);
      display: inline-block;
    }

    .calendar-event-item {
      flex-direction: column;
      gap: var(--space-2xs);
    }

    .event-time {
      width: 100%;
    }

    table,
    thead,
    tbody,
    th,
    td,
    tr {
      display: block;
    }

    thead {
      display: none;
    }

    tr {
      margin-block-end: var(--space-md);
      padding-block-end: var(--space-xs);
      border-block-end: var(--rule-width) solid var(--color-rule);
    }

    td {
      display: block;
      padding-block: var(--space-2xs);
      padding-inline: 0;
      border: none;
      font-size: var(--text-sm);
      white-space: normal;
      overflow-wrap: anywhere;
      text-align: left;
    }

    td[data-label]:not([data-label=""])::before {
      content: attr(data-label) " :";
      font-weight: var(--weight-medium);
      color: var(--color-text-muted);
      margin-inline-end: var(--space-2xs);
    }

    td.col-action {
      text-align: right;
    }

    .month-row th,
    .program-row th {
      display: block;
      width: 100%;
      text-align: left;
      border: none;
      border-block-end: var(--rule-width) solid var(--color-rule-strong);
      padding-block: var(--space-xs);
      padding-inline: 0;
    }

    .grades-table td.col-ue-cell[data-empty="true"] {
      display: none;
    }
  }
}

@layer print {
  @media print {
    :root {
      --color-text: var(--gray-950);
      --color-bg: var(--gray-0);
      --color-rule: var(--gray-300);
      --color-rule-strong: var(--gray-950);
    }

    .section-nav,
    .back-navigation,
    .nav-toggle,
    .filter-form,
    #filters-container,
    .calendar-nav-bar,
    .grades-actions,
    .site-footer,
    .heading-toggle-btn {
      display: none;
    }

    body {
      background-color: var(--color-bg);
      color: var(--color-text);
      font-size: var(--text-base);
    }

    .page-container,
    .site-header {
      max-width: 100%;
      margin: 0;
      padding: 0;
      border: none;
    }

    a {
      color: var(--color-text);
      text-decoration: none;
    }

    h1,
    h2,
    h3 {
      break-after: avoid;
      page-break-after: avoid;
      color: var(--color-text);
    }

    table {
      width: 100%;
      border-collapse: collapse;
      display: table;
    }

    thead {
      display: table-header-group;
    }

    tbody {
      display: table-row-group;
    }

    tr {
      display: table-row;
      break-inside: avoid;
      page-break-inside: avoid;
    }

    th,
    td {
      display: table-cell;
      padding-block: var(--space-2xs);
      padding-inline: var(--space-xs);
      border-block-end: var(--rule-width) solid var(--color-rule);
      vertical-align: top;
      color: var(--color-text);
    }

    th {
      border-block-end: var(--rule-width) solid var(--color-rule-strong);
    }

    tbody tr:hover {
      background-color: transparent;
    }

    .month-row th,
    .program-row th {
      display: table-cell;
    }

    td[data-label]::before {
      content: none;
    }

    .calendar-view-week {
      display: block;
    }

    .calendar-view-week .day-section {
      border-inline-start: none;
      padding-inline-start: 0;
      margin-block-end: var(--space-lg);
      break-inside: avoid;
      page-break-inside: avoid;
    }

    .calendar-view-week .calendar-event-item {
      flex-direction: row;
      gap: var(--space-md);
    }

    .calendar-view-week .event-time {
      width: var(--width-event-time);
      font-size: var(--text-base);
    }

    .calendar-view-week .event-title {
      font-size: var(--text-base);
    }

    .calendar-view-week .event-teachers,
    .calendar-view-week .event-rooms,
    .calendar-view-week .event-groups {
      font-size: var(--text-sm);
    }
  }
}

@layer utilities {
  [hidden] {
    display: none;
  }
}