/* =========================================================
   CIRA CLASSROOM — Shared Learning Shell
   Version: 1.0
   Date: 2026-10-07

   Authority:
   docs/production/CIRA_CLASSROOM_PAGE_LAYOUT_AND_UI_STANDARD_v1.0.md

   Rule:
   Shared geometry lives here. Page-specific styles may format
   learning content but must not redefine shell coordinates.
   ========================================================= */

:root {
  --classroom-page-pad-desktop: 32px;
  --classroom-page-pad-tablet: 24px;
  --classroom-page-pad-mobile: 16px;

  --classroom-identity-min-height: 78px;
  --classroom-stage-header-min-height: 106px;
  --classroom-working-header-min-height: 48px;

  --classroom-working-header-gap: 24px;
  --classroom-working-header-margin-bottom: 28px;

  --classroom-reading-max: 760px;
  --classroom-training-max: 900px;
  --classroom-identity-max: 920px;
  --classroom-stage-header-max: 860px;
}

/* Reserve the Road Map slot before the shared JS renderer runs. */
[data-unit-roadmap] {
  min-height: 109px;
  border-bottom: 1px solid var(--cira-border);
  background: var(--cira-surface);
}

/* =========================================================
   UNIT ROAD MAP
   ========================================================= */

.classroom-roadmap {
  width: 100%;
  padding: 18px 0 15px;
  border-bottom: 1px solid var(--cira-border);
  background: var(--cira-surface);
}

.classroom-roadmap__inner {
  width: min(100% - 64px, var(--cira-content-max));
  margin-inline: auto;
}

.classroom-roadmap__track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: start;
  width: 100%;
}

.classroom-roadmap__track::before {
  content: "";
  position: absolute;
  z-index: 0;
  top: 24px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: var(--cira-border);
}

.classroom-roadmap__stage {
  position: relative;
  z-index: 1;
  min-width: 0;
  padding: 0 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--cira-text-muted);
  text-align: center;
  text-decoration: none;
}

.classroom-roadmap__circle {
  width: 50px;
  height: 50px;
  flex: 0 0 50px;
  display: grid;
  place-items: center;
  border: 2px solid var(--cira-border-strong);
  border-radius: 50%;
  background: var(--cira-surface);
  color: var(--cira-primary);
  font-size: 15px;
  font-weight: 850;
  line-height: 1;
}

.classroom-roadmap__label {
  width: 100%;
  color: currentColor;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
}

.classroom-roadmap__stage.is-active {
  color: var(--cira-red);
}

.classroom-roadmap__stage.is-active .classroom-roadmap__circle {
  border-color: var(--cira-red);
  background: var(--cira-red);
  color: #fff;
}

.classroom-roadmap__stage.is-active .classroom-roadmap__label {
  font-weight: 850;
}

.classroom-roadmap__stage.is-pending {
  opacity: .58;
}

a.classroom-roadmap__stage:hover .classroom-roadmap__circle,
a.classroom-roadmap__stage:focus-visible .classroom-roadmap__circle {
  border-color: var(--cira-red);
}

a.classroom-roadmap__stage:focus-visible {
  outline: 3px solid var(--cira-focus);
  outline-offset: 4px;
  border-radius: 12px;
}

/* =========================================================
   PAGE SHELL
   ========================================================= */

.classroom-page {
  width: 100%;
  padding: 28px 0 64px;
  background: var(--cira-cream);
}

.classroom-page__inner {
  width: min(100% - 64px, var(--cira-content-max));
  margin-inline: auto;
}

.classroom-breadcrumbs {
  min-height: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
  margin: 0 0 18px;
  color: var(--cira-text-muted);
  font-size: 14px;
  line-height: 1.4;
}

.classroom-breadcrumbs a {
  color: inherit;
  text-decoration: none;
}

.classroom-breadcrumbs a:hover {
  color: var(--cira-red);
}

.classroom-identity {
  width: 100%;
  max-width: var(--classroom-identity-max);
  min-height: var(--classroom-identity-min-height);
  margin: 0 0 24px;
}

.classroom-identity__meta {
  margin: 0 0 8px;
  color: var(--cira-text-muted);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: .075em;
  text-transform: uppercase;
}

.classroom-identity__title {
  margin: 0;
  color: var(--cira-primary);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -.028em;
}

.classroom-stage-header {
  width: 100%;
  max-width: var(--classroom-stage-header-max);
  min-height: var(--classroom-stage-header-min-height);
  margin: 0 0 24px;
}

.classroom-stage-header__eyebrow {
  margin: 0 0 7px;
  color: var(--cira-red);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: .075em;
  text-transform: uppercase;
}

.classroom-stage-header__title {
  margin: 0 0 8px;
  color: var(--cira-primary);
  font-size: 24px;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.018em;
}

.classroom-stage-header__instruction {
  max-width: 760px;
  margin: 0;
  color: var(--cira-text);
  font-size: 17px;
  line-height: 1.55;
}

/* =========================================================
   WORKING AREA
   ========================================================= */

.classroom-working-area {
  width: 100%;
  padding: 32px;
  border: 1px solid var(--cira-border);
  border-radius: var(--cira-radius-card);
  background: var(--cira-surface);
  box-shadow: var(--cira-shadow-card);
}

.classroom-working-header {
  width: 100%;
  min-height: var(--classroom-working-header-min-height);
  margin: 0 0 var(--classroom-working-header-margin-bottom);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--classroom-working-header-gap);
}

.classroom-working-title {
  margin: 0;
  color: var(--cira-primary);
  font-size: 28px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.02em;
}

.classroom-working-header__spacer {
  width: 1px;
  height: 40px;
  visibility: hidden;
}

.classroom-view-selector {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  padding: 4px;
  border: 1px solid var(--cira-border);
  border-radius: 12px;
  background: var(--cira-surface-soft);
  white-space: nowrap;
}

.classroom-view-selector__button,
.classroom-view-selector__link {
  min-height: 40px;
  padding: 8px 14px;
  border: 0;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--cira-text-muted);
  background: transparent;
  font: inherit;
  font-size: 14px;
  font-weight: 750;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
}

.classroom-view-selector__button {
  cursor: pointer;
}

.classroom-view-selector__button:hover,
.classroom-view-selector__link:hover,
.classroom-view-selector__button:focus-visible,
.classroom-view-selector__link:focus-visible {
  color: var(--cira-primary);
}

.classroom-view-selector__button.is-active,
.classroom-view-selector__link.is-active {
  background: var(--cira-primary);
  color: #fff;
  box-shadow: 0 2px 6px rgba(38, 52, 66, .12);
}

.classroom-reading-width {
  width: min(100%, var(--classroom-reading-max));
  margin-left: auto;
  margin-right: auto;
}

.classroom-training-width {
  width: min(100%, var(--classroom-training-max));
  margin-left: auto;
  margin-right: auto;
}

/* =========================================================
   SHARED HUB / PLACEHOLDER CONTENT
   ========================================================= */

.classroom-hub-grid {
  width: min(100%, var(--classroom-training-max));
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.classroom-hub-grid--units {
  width: 100%;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.classroom-hub-card--pending {
  opacity: .68;
  background: #fbfcfd;
}

.classroom-hub-card {
  display: block;
  min-height: 154px;
  padding: 22px;
  border: 1px solid var(--cira-border);
  border-radius: 14px;
  background: var(--cira-surface-soft);
  color: var(--cira-text);
  text-decoration: none;
}

.classroom-hub-card:hover,
.classroom-hub-card:focus-visible {
  border-color: var(--cira-red);
}

.classroom-hub-card__eyebrow {
  display: block;
  margin: 0 0 7px;
  color: var(--cira-red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .085em;
  text-transform: uppercase;
}

.classroom-hub-card h3 {
  margin: 0 0 7px;
  color: var(--cira-primary);
  font-size: 22px;
}

.classroom-hub-card p {
  margin: 0;
  color: var(--cira-text-muted);
  font-size: 15px;
  line-height: 1.5;
}

.classroom-placeholder {
  width: min(100%, var(--classroom-training-max));
  min-height: 180px;
  display: grid;
  align-content: center;
  padding: 26px;
  border: 1px dashed var(--cira-border-strong);
  border-radius: 14px;
  background: var(--cira-surface-soft);
}

.classroom-placeholder p {
  margin: 0;
  color: var(--cira-text-muted);
}

/* =========================================================
   BOTTOM NAV
   ========================================================= */

.classroom-bottom-nav {
  width: min(100%, var(--classroom-training-max));
  margin: 28px auto 0;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--cira-border);
}

.classroom-bottom-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--cira-red);
  font-weight: 800;
  text-decoration: none;
}

.classroom-bottom-nav a:hover {
  text-decoration: underline;
}

/* =========================================================
   TABLET
   ========================================================= */

@media (max-width: 1023px) {
  .classroom-hub-grid--units {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .classroom-roadmap__inner,
  .classroom-page__inner {
    width: min(100% - 48px, var(--cira-content-max));
  }

  .classroom-page {
    padding-top: 26px;
    padding-bottom: 56px;
  }
}

/* =========================================================
   MOBILE
   ========================================================= */

@media (max-width: 767px) {
  [data-unit-roadmap] {
    min-height: 92px;
  }

  .classroom-roadmap {
    padding-top: 15px;
    padding-bottom: 12px;
  }

  .classroom-roadmap__inner,
  .classroom-page__inner {
    width: min(100% - 32px, var(--cira-content-max));
  }

  .classroom-roadmap__track::before {
    top: 20px;
  }

  .classroom-roadmap__stage {
    padding-inline: 3px;
    gap: 6px;
  }

  .classroom-roadmap__circle {
    width: 42px;
    height: 42px;
    flex-basis: 42px;
    font-size: 13px;
  }

  .classroom-roadmap__label {
    font-size: 11px;
    line-height: 1.15;
  }

  .classroom-page {
    padding-top: 22px;
    padding-bottom: 48px;
  }

  .classroom-breadcrumbs {
    margin-bottom: 16px;
    font-size: 13px;
  }

  .classroom-identity {
    margin-bottom: 20px;
  }

  .classroom-identity__meta {
    font-size: 12px;
  }

  .classroom-identity__title {
    font-size: 26px;
    line-height: 1.22;
  }

  .classroom-stage-header {
    margin-bottom: 20px;
  }

  .classroom-stage-header__eyebrow {
    font-size: 12px;
  }

  .classroom-stage-header__title {
    font-size: 21px;
  }

  .classroom-stage-header__instruction {
    font-size: 16px;
  }

  .classroom-working-area {
    padding: 20px 18px;
  }

  .classroom-working-header {
    min-height: 44px;
    gap: 10px;
    margin-bottom: 24px;
  }

  .classroom-working-title {
    font-size: 20px;
    white-space: nowrap;
  }

  .classroom-view-selector {
    max-width: 58vw;
    overflow-x: auto;
    scrollbar-width: thin;
  }

  .classroom-view-selector__button,
  .classroom-view-selector__link {
    flex: 0 0 auto;
    min-height: 38px;
    padding: 7px 10px;
    font-size: 13px;
  }

  .classroom-hub-grid,
  .classroom-hub-grid--units {
    grid-template-columns: 1fr;
  }

  .classroom-bottom-nav {
    flex-direction: column;
    gap: 4px;
  }
}

@media (max-width: 380px) {
  .classroom-working-area {
    padding-left: 14px;
    padding-right: 14px;
  }

  .classroom-working-title {
    font-size: 18px;
  }

  .classroom-roadmap__label {
    font-size: 10px;
  }
}