:root {
  --course-teal: #2d9a92;
  --course-teal-dark: #176f69;
  --course-teal-soft: #d8e7e8;
  --course-blue: #2d69b2;
  --course-ink: #172323;
  --course-muted: #586767;
  --course-line: #dce6e6;
  --course-bg: #ffffff;
  --course-soft: #f5f8f8;
  --course-good: #1f7a52;
  --course-bad: #a63e34;
  --course-locked: #9aa6a6;
}

.course-page {
  background: #fff;
}

.course-shell {
  display: grid;
  grid-template-columns: 330px minmax(0, 1fr);
  min-height: calc(100vh - 80px);
  background: var(--course-bg);
}

.course-sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  border-right: 1px solid var(--course-line);
  background: #f8faf9;
  z-index: 12;
}

.course-brand {
  padding: 1.5rem 1.35rem 1.2rem;
  color: #fff;
  background:
    radial-gradient(circle at top right, rgba(255,255,255,.14), transparent 10rem),
    linear-gradient(145deg, #173b39 0%, #235e59 55%, #2d9a92 100%);
}

.course-back-link {
  display: inline-flex;
  margin-bottom: 1.4rem;
  color: rgba(255,255,255,.88);
  font-size: .84rem;
  font-weight: 700;
  text-decoration: none;
}

.course-back-link:hover,
.course-back-link:focus-visible {
  text-decoration: underline;
}

.course-label {
  margin: 0 0 .4rem;
  color: #cde8e5;
  font-size: .73rem;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.course-brand h1 {
  margin: 0;
  font-size: 1.45rem;
  line-height: 1.25;
  letter-spacing: -.02em;
}

.course-progress-wrap {
  margin-top: 1.25rem;
}

.course-progress-track {
  height: 6px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255,255,255,.28);
}

.course-progress-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: #fff;
  transition: width .25s ease;
}

.course-progress-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-top: .55rem;
  color: #edf8f7;
  font-size: .75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.course-reset {
  padding: 0;
  border: 0;
  background: transparent;
  color: #fff;
  font: inherit;
  text-decoration: underline;
  cursor: pointer;
}

.course-nav {
  padding: .55rem 0 2rem;
}

.course-nav-group {
  border-bottom: 1px solid #e4ebeb;
}

.course-nav-objective {
  padding: .9rem 1rem .65rem;
  color: #334242;
  font-size: .72rem;
  font-weight: 900;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.course-nav-item {
  display: grid;
  grid-template-columns: 1.2rem minmax(0, 1fr) 1.1rem;
  gap: .65rem;
  align-items: center;
  width: 100%;
  padding: .78rem 1rem;
  border: 0;
  background: transparent;
  color: var(--course-ink);
  text-align: left;
  font: inherit;
  cursor: pointer;
}

.course-nav-item:hover:not(:disabled),
.course-nav-item:focus-visible:not(:disabled) {
  background: #edf4f3;
}

.course-nav-item.is-current {
  background: #e7f3f2;
  box-shadow: inset 3px 0 0 var(--course-teal);
}

.course-nav-item:disabled {
  color: var(--course-locked);
  cursor: not-allowed;
}

.course-nav-icon {
  color: #768585;
  font-size: .9rem;
}

.course-nav-status {
  width: 1rem;
  height: 1rem;
  border: 2px solid #c8d1d1;
  border-radius: 50%;
}

.course-nav-status.is-complete {
  border-color: var(--course-good);
  background: var(--course-good);
  box-shadow: inset 0 0 0 3px #fff;
}

.course-main {
  min-width: 0;
  background: #fff;
}

.course-mobile-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 54px;
  padding: 0 1.25rem;
  border-bottom: 1px solid var(--course-line);
  background: #fff;
}

.course-mobile-bar a {
  color: #263636;
  font-size: .83rem;
  font-weight: 800;
  text-decoration: none;
  text-transform: uppercase;
}

.course-menu-button {
  display: none;
  align-items: center;
  gap: .5rem;
  border: 0;
  background: transparent;
  color: var(--course-ink);
  font-weight: 800;
  cursor: pointer;
}

.course-content-wrap {
  width: min(1000px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 3.5rem 0 5rem;
}

.course-step-meta {
  margin-bottom: .8rem;
  color: #5e6e6e;
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.course-content h2 {
  margin: 0;
  max-width: 850px;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.04;
  letter-spacing: -.045em;
}

.course-content h3 {
  margin: 2rem 0 .7rem;
  font-size: 1.45rem;
}

.course-content p,
.course-content li {
  color: #344545;
  font-size: 1.04rem;
  line-height: 1.8;
}

.course-content ul {
  padding-left: 1.25rem;
}

.course-rule {
  width: 130px;
  height: 4px;
  margin: 1.8rem 0 2.3rem;
  border-radius: 999px;
  background: var(--course-teal);
}

.course-objective-list {
  display: grid;
  gap: 1rem;
  margin: 2rem 0;
}

.course-objective-card {
  padding: 1.2rem 1.25rem;
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: #fafcfc;
}

.course-objective-card strong {
  display: block;
  margin-bottom: .3rem;
}

.course-callout {
  margin: 1.8rem 0;
  padding: 1.1rem 1.2rem;
  border-left: 4px solid var(--course-teal);
  border-radius: 10px;
  background: #eef7f6;
}

.course-actions {
  display: flex;
  justify-content: flex-end;
  gap: .75rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--course-line);
}

.course-button {
  min-height: 46px;
  padding: .75rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 9px;
  background: var(--course-teal);
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.course-button:hover,
.course-button:focus-visible {
  background: var(--course-teal-dark);
}

.course-button:disabled {
  background: #b4c0c0;
  cursor: not-allowed;
}

.course-button--secondary {
  border-color: #cdd9d9;
  background: #fff;
  color: var(--course-teal-dark);
}

.course-button--secondary:hover,
.course-button--secondary:focus-visible {
  background: #f3f8f8;
}

.course-activity,
.course-quiz {
  margin-top: 2rem;
  padding: 1.35rem;
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: #fafcfc;
}

.course-choice-list {
  display: grid;
  gap: .7rem;
  margin-top: 1rem;
}

.course-choice {
  display: flex;
  gap: .7rem;
  align-items: flex-start;
  padding: .85rem .9rem;
  border: 1px solid #d5dfdf;
  border-radius: 10px;
  background: #fff;
}

.course-choice input {
  margin-top: .25rem;
}

.course-feedback {
  margin-top: 1rem;
  padding: .9rem 1rem;
  border-radius: 9px;
  font-weight: 700;
  line-height: 1.55;
}

.course-feedback.is-good {
  background: #eaf6ef;
  color: #1c6847;
}

.course-feedback.is-bad {
  background: #faeeec;
  color: #87362e;
}

.course-score {
  margin: 1.1rem 0 0;
  font-size: 1.1rem;
  font-weight: 900;
}

.course-complete-panel {
  padding: 2rem;
  border: 1px solid #cae1dd;
  border-radius: 16px;
  background: linear-gradient(145deg, #edf8f6, #fff);
}

.course-noscript {
  padding: 1rem;
  background: #fff4d8;
  color: #4c3c13;
}

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

  .course-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: min(86vw, 340px);
    transform: translateX(-105%);
    transition: transform .22s ease;
    box-shadow: 10px 0 30px rgba(0,0,0,.12);
  }

  .course-sidebar.is-open {
    transform: translateX(0);
  }

  .course-menu-button {
    display: inline-flex;
  }

  .course-content-wrap {
    width: min(100% - 2rem, 1000px);
    padding-top: 2.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-progress-bar,
  .course-sidebar {
    transition: none;
  }
}

/* Database-driven quiz layout */
.course-question {
  border: 0;
  margin: 0 0 1.15rem;
  padding: 0;
}

.course-question + .course-question {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--course-line);
}

.course-question legend {
  margin: 0 0 .45rem;
  padding: 0;
  font-weight: 900;
  line-height: 1.45;
}

.course-question .course-choice-list {
  margin-top: .45rem;
}

.course-quiz #quiz-results {
  margin-top: 1rem;
}

/* Quiz/final exam results */
.course-results {
  width: 100%;
}

.course-results__summary {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 1.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
  padding: 1.5rem;
  border: 1px solid var(--course-line);
  border-radius: 16px;
  background: #fafcfc;
}

.course-score-gauge {
  position: relative;
  width: min(100%, 260px);
  height: 140px;
  margin: 0 auto;
}

.course-score-gauge__svg {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.course-score-gauge__svg path {
  fill: none;
  stroke-width: 10;
  stroke-linecap: butt;
}

.course-score-gauge__needle {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 20px;
  width: 94px;
  height: 3px;
  border-radius: 999px;
  background: #111;
  transform: rotate(180deg);
  transform-origin: 0 50%;
  transition: transform 900ms cubic-bezier(.2, .7, .2, 1);
}

.course-score-gauge__hub {
  position: absolute;
  z-index: 4;
  left: 50%;
  bottom: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #111;
  transform: translate(-50%, 50%);
}

.course-results__score-text h2 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 5.4rem);
  line-height: 1;
}

.course-results__score-text p {
  margin: .8rem 0 0;
  color: var(--course-muted);
  line-height: 1.65;
}

.course-results__eyebrow {
  margin: 0 0 .4rem !important;
  color: var(--course-teal-dark) !important;
  font-size: .78rem !important;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.course-results__status {
  margin-bottom: 2rem;
  padding: 1rem 1.1rem;
  border-radius: 10px;
  font-weight: 800;
  line-height: 1.55;
}

.course-results__status.is-passed {
  background: #eaf6ef;
  color: #1c6847;
}

.course-results__status.is-failed {
  background: #faeeec;
  color: #87362e;
}

.course-review > h3 {
  margin: 0 0 1rem;
}

.course-review-item {
  margin-bottom: 1rem;
  padding: 1.2rem;
  border: 1px solid var(--course-line);
  border-left-width: 5px;
  border-radius: 12px;
  background: #fff;
}

.course-review-item.is-correct {
  border-left-color: var(--course-good);
}

.course-review-item.is-wrong {
  border-left-color: var(--course-bad);
}

.course-review-item__heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: .55rem;
}

.course-review-item__number {
  color: var(--course-muted);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .05em;
  text-transform: uppercase;
}

.course-review-item__result {
  font-size: .78rem;
  font-weight: 900;
}

.course-review-item.is-correct .course-review-item__result {
  color: var(--course-good);
}

.course-review-item.is-wrong .course-review-item__result {
  color: var(--course-bad);
}

.course-review-item h4 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
  line-height: 1.5;
}

.course-review-answer {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: .75rem;
  margin-top: .55rem;
  padding: .75rem .85rem;
  border-radius: 9px;
  background: #f6f8f8;
}

.course-review-answer span {
  color: var(--course-muted);
  font-size: .8rem;
  font-weight: 800;
}

.course-review-answer--correct {
  background: #eaf6ef;
}

.course-review-answer--correct span,
.course-review-answer--correct strong {
  color: #1c6847;
}


.course-review-answer--wrong {
  background: #fbeceb;
  border: 1px solid #efc3bf;
}

.course-review-answer--wrong span,
.course-review-answer--wrong strong {
  color: #8f2f27;
}

.course-review-feedback {
  margin: .8rem 0 0 !important;
  padding-top: .8rem;
  border-top: 1px solid var(--course-line);
  color: #4a5b5b !important;
  font-size: .92rem !important;
}

.course-results__actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--course-line);
}

@media (max-width: 700px) {
  .course-results__summary {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .course-results__score-text {
    text-align: center;
  }

  .course-review-answer {
    grid-template-columns: 1fr;
    gap: .25rem;
  }

  .course-results__actions .course-button {
    width: 100%;
  }
}