:root {
  color-scheme: light;
  --ink: #172a35;
  --muted: #526670;
  --paper: #fbfaf6;
  --surface: #fff;
  --line: #d8e1df;
  --teal: #086d67;
  --blue: #215b86;
  --coral: #c9513d;
  --yellow: #e8b638;
  font-family: 'DM Sans', sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
}

a { color: inherit; }

.course-header {
  background: var(--ink);
  color: #fff;
}

.course-header-inner,
.course-main {
  width: min(1080px, calc(100% - 40px));
  margin-inline: auto;
}

.course-header-inner {
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.course-brand {
  font-family: 'Fraunces', serif;
  font-size: 21px;
  text-decoration: none;
}

.course-nav {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  white-space: nowrap;
}

.course-nav a {
  color: #dbe9e7;
  font-size: 14px;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.course-main { padding-block: 38px 64px; }

.course-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.course-heading h1 {
  max-width: 680px;
  margin: 0;
  font-family: 'Fraunces', serif;
  font-size: 38px;
  font-weight: 600;
  line-height: 1.12;
}

.course-heading p {
  max-width: 350px;
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.learning-path {
  margin-block: 26px 34px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--teal);
  background: #fff;
}

.path-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.path-eyebrow {
  margin: 0 0 5px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.path-heading h2 {
  margin: 0;
  font-family: 'Fraunces', serif;
  font-size: 25px;
  line-height: 1.2;
}

.path-description {
  max-width: 590px;
  margin: 7px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.path-controls {
  display: flex;
  align-items: end;
  flex-wrap: wrap;
  gap: 9px;
}

.path-controls label {
  display: grid;
  gap: 5px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
}

.path-controls select,
.path-print-button,
.path-review-link {
  min-height: 42px;
  padding: 8px 11px;
  border: 1px solid #aebfbd;
  border-radius: 4px;
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 13px;
}

.path-print-button,
.path-review-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-color: var(--teal);
  color: var(--teal);
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}

.path-print-button:disabled {
  border-color: var(--line);
  color: #78878a;
  cursor: not-allowed;
}

.path-status {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.path-overview { margin-top: 16px; }
.path-progress-copy { margin: 0 0 7px; font-size: 13px; font-weight: 700; }

.path-progress-meter {
  height: 8px;
  overflow: hidden;
  background: #e5eeeb;
}

.path-progress-meter span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--teal);
  transition: width 180ms ease;
}

.path-recommendation {
  margin: 12px 0 0;
  color: var(--ink);
  font-weight: 600;
}

.path-recommendation a,
.path-open-link { color: var(--blue); font-weight: 700; text-underline-offset: 3px; }

.learning-path-list {
  display: grid;
  gap: 0;
  margin: 16px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.learning-path-unit { list-style: none; }
.path-unit-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 14px 0 7px; }
.path-unit-heading h3 { margin: 0; color: var(--teal); font-size: 15px; }
.path-unit-heading span { color: var(--muted); font-size: 12px; white-space: nowrap; }
.path-unit-lessons { margin: 0; padding: 0; list-style: none; }

.learning-path-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  min-height: 68px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.path-number { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.path-lesson-detail { display: flex; align-items: baseline; flex-wrap: wrap; gap: 7px 12px; min-width: 0; }
.path-lesson-detail h4 { margin: 0; font-size: 15px; font-weight: 600; line-height: 1.35; }
.lesson-state { color: var(--muted); font-size: 12px; font-weight: 700; white-space: nowrap; }
.state-mastered { color: #16734c; }
.state-developing-mastery { color: #8a5a00; }
.state-progress-unavailable { color: #815033; }
.teacher-print-note { display: none; }

.path-controls select:focus-visible,
.path-print-button:focus-visible,
.path-review-link:focus-visible,
.path-open-link:focus-visible,
.path-recommendation a:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 2px;
}

.course-filters {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 180px 180px auto;
  gap: 12px;
  align-items: end;
  margin-block: 24px 18px;
}

.filter-field { display: grid; gap: 6px; }
.filter-field label { font-size: 13px; font-weight: 700; }

.filter-field input,
.filter-field select {
  width: 100%;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid #aebfbd;
  border-radius: 6px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}

.filter-field input:focus-visible,
.filter-field select:focus-visible,
.open-course:focus-visible,
.course-nav a:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 2px;
}

.course-result-count {
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: end;
  color: var(--muted);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.course-status {
  min-height: 26px;
  margin: 0;
  color: var(--coral);
  font-weight: 600;
}

.course-list { border-top: 1px solid var(--line); }

.course-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 82px;
  padding: 14px 4px;
  border-bottom: 1px solid var(--line);
}

.course-description {
  display: grid;
  grid-template-columns: 82px 110px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.subject-label,
.grade-label { font-size: 13px; font-weight: 700; }
.subject-label { color: var(--teal); }
.subject-science { color: var(--blue); }
.grade-label { color: var(--muted); }

.course-row h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
}

.open-course {
  flex: 0 0 auto;
  padding: 9px 12px;
  border: 1px solid var(--teal);
  border-radius: 6px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.open-course:hover { background: #e6f3ef; }

@media (max-width: 760px) {
  .course-header-inner { align-items: flex-start; flex-direction: column; padding-block: 12px; }
  .course-nav { width: 100%; padding-bottom: 4px; }
  .course-main { padding-top: 28px; }
  .course-heading { align-items: flex-start; flex-direction: column; }
  .course-heading h1 { font-size: 32px; }
  .path-heading { flex-direction: column; }
  .path-controls { width: 100%; align-items: flex-end; }
  .path-controls label { flex: 1 1 130px; }
  .path-controls select { width: 100%; }
  .course-filters { grid-template-columns: 1fr 1fr; }
  .filter-search { grid-column: 1 / -1; }
  .course-result-count { justify-content: start; }
}

@media (max-width: 520px) {
  .course-header-inner,
  .course-main { width: min(100% - 28px, 1080px); }
  .course-filters { grid-template-columns: 1fr; }
  .filter-search { grid-column: auto; }
  .course-row { align-items: flex-start; }
  .course-description { grid-template-columns: auto auto; gap: 5px 12px; }
  .course-row h2 { grid-column: 1 / -1; }
  .open-course { align-self: center; padding-inline: 9px; font-size: 13px; }
  .learning-path { padding: 17px 14px; }
  .path-heading h2 { font-size: 22px; }
  .path-controls { display: grid; grid-template-columns: 1fr 1fr; }
  .path-print-button, .path-review-link { width: 100%; }
  .learning-path-item { grid-template-columns: 27px minmax(0, 1fr); gap: 8px; }
  .path-open-link { grid-column: 2; }
}

@media print {
  body * { visibility: hidden; }
  .learning-path, .learning-path * { visibility: visible; }
  .learning-path {
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    color: #000;
  }
  .path-controls, .path-status, .path-overview, .lesson-state { display: none !important; }
  .teacher-print-note { display: block; margin-top: 16px; font-size: 12px; }
  .learning-path-item { min-height: 40px; break-inside: avoid; }
  .path-lesson-detail h4 { color: #000; }
  .path-number { color: #333; }
  .path-open-link { display: block; font-size: 11px; }
  .path-open-link::after { content: " (" attr(href) ")"; font-weight: 400; }
}