* {
  box-sizing: border-box;
}

:root {
  --academy-bg: #f7f7f4;
  --academy-surface: #ffffff;
  --academy-surface-2: #f1f1ec;
  --academy-ink: #15171a;
  --academy-muted: #686b70;
  --academy-line: #deded6;
  --academy-green: #14302a;
  --academy-green-2: #0e241f;
  --academy-coral: #c96442;
  --academy-coral-2: #d9866c;
  --academy-amber: #c98421;
  --academy-success: #3f6a4a;
  --academy-shadow: 0 18px 44px rgba(18, 48, 42, 0.08);
}

html[data-theme="dark"] {
  --academy-bg: #171512;
  --academy-surface: #25211d;
  --academy-surface-2: #322c25;
  --academy-ink: #f5f1e8;
  --academy-muted: #aaa197;
  --academy-line: #41392f;
  --academy-green: #0e241f;
  --academy-green-2: #091713;
  --academy-coral: #e07856;
  --academy-coral-2: #f08968;
  --academy-amber: #dca248;
  --academy-success: #8fbe93;
  --academy-shadow: 0 24px 54px rgba(0, 0, 0, 0.32);
}

html,
body {
  min-height: 100%;
  margin: 0;
  background: var(--academy-bg);
  color: var(--academy-ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.45;
}

body {
  overflow-x: hidden;
}

button,
a {
  font: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.lms-icon {
  display: inline-block;
  flex: 0 0 auto;
  vertical-align: -0.18em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.catalog-root {
  min-height: 100vh;
  padding: 0 0 42px;
}

.catalog-main {
  width: min(1320px, 100%);
  margin: 24px auto 0;
  padding: 0 24px;
}

.icon-btn,
.ghost-btn,
.primary-btn {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--academy-line);
  border-radius: 8px;
  background: var(--academy-surface-2);
  color: var(--academy-ink);
  cursor: pointer;
  font-weight: 760;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.ghost-btn,
.primary-btn {
  gap: 8px;
  padding: 0 15px;
}

.icon-btn {
  min-width: 72px;
  padding: 0 12px;
}

.primary-btn {
  border-color: transparent;
  background: var(--academy-green);
  color: #fff;
}

.ghost-btn:hover,
.icon-btn:hover,
.primary-btn:hover {
  transform: translateY(-1px);
  border-color: var(--academy-coral);
}

.intro-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: 24px;
  align-items: center;
  margin-bottom: 18px;
  border: 1px solid var(--academy-line);
  border-radius: 8px;
  background: var(--academy-surface);
  box-shadow: var(--academy-shadow);
  padding: 24px;
}

.intro-kicker-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  max-width: 940px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--academy-coral);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.mode-toggle {
  display: inline-flex;
  width: 38px;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--academy-line);
  border-radius: 6px;
  background: color-mix(in srgb, var(--academy-surface) 82%, var(--academy-surface-2) 18%);
  color: var(--academy-muted);
  cursor: pointer;
  padding: 0;
  font-size: 12px;
  font-weight: 820;
}

.mode-toggle:hover {
  border-color: var(--academy-coral);
  color: var(--academy-ink);
}

h1 {
  max-width: 760px;
  margin: 0;
  color: var(--academy-ink);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 850;
  line-height: 1.04;
  letter-spacing: 0;
}

.intro-copy {
  max-width: 560px;
  margin: 0;
  color: var(--academy-muted);
  font-size: 15px;
  line-height: 1.6;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(280px, 1fr));
  gap: 18px;
  align-items: stretch;
}

.course-card {
  display: flex;
  min-height: 520px;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--academy-line);
  border-radius: 8px;
  background: var(--academy-surface);
  box-shadow: 0 1px 2px rgba(18, 48, 42, 0.04), 0 12px 28px rgba(18, 48, 42, 0.06);
}

.course-card.is-locked .course-preview-surface {
  filter: saturate(0.78);
}

.course-card.is-loading {
  min-height: 420px;
  box-shadow: none;
}

.course-card.is-loading .course-preview-surface {
  min-height: 180px;
  background: color-mix(in srgb, var(--academy-surface-2) 72%, var(--academy-surface) 28%);
}

.loading-line {
  height: 14px;
  margin-bottom: 12px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--academy-ink) 10%, transparent);
}

.loading-line.is-short {
  width: 52%;
}

.course-preview {
  padding: 14px;
}

.course-preview-surface {
  min-height: 154px;
  border-radius: 8px;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--academy-coral) 16%, var(--academy-surface) 84%), color-mix(in srgb, var(--academy-amber) 8%, var(--academy-surface-2) 92%));
  padding: 14px;
}

.course-preview.is-green .course-preview-surface {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--academy-green) 22%, var(--academy-surface) 78%), color-mix(in srgb, var(--academy-coral) 14%, var(--academy-surface-2) 86%));
}

.course-preview.is-blue .course-preview-surface {
  background:
    linear-gradient(135deg, color-mix(in srgb, #356a8a 22%, var(--academy-surface) 78%), color-mix(in srgb, var(--academy-coral) 14%, var(--academy-surface-2) 86%));
}

.course-preview-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: center;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  width: fit-content;
  min-height: 28px;
  border: 1px solid color-mix(in srgb, var(--academy-coral) 18%, transparent);
  border-radius: 999px;
  background: color-mix(in srgb, var(--academy-surface) 82%, var(--academy-coral) 18%);
  color: var(--academy-coral);
  padding: 0 11px;
  font-size: 12px;
  font-weight: 850;
  line-height: 1;
}

.chip.is-muted {
  border-color: var(--academy-line);
  background: color-mix(in srgb, var(--academy-surface) 86%, var(--academy-surface-2) 14%);
  color: var(--academy-muted);
}

.preview-title {
  margin-top: 22px;
  max-width: 240px;
  color: var(--academy-ink);
  font-size: 23px;
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1;
}

.preview-lines {
  display: grid;
  gap: 8px;
  margin-top: 20px;
  max-width: 84%;
}

.preview-lines span {
  display: block;
  height: 7px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--academy-coral) 30%, transparent);
}

.preview-lines span:nth-child(2) {
  width: 86%;
}

.preview-lines span:nth-child(3) {
  width: 68%;
}

.course-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 0 18px 18px;
}

.course-meta-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
}

.course-icon {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--academy-line);
  border-radius: 8px;
  color: var(--academy-coral);
  font-size: 18px;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px;
}

.course-title {
  margin: 0 0 18px;
  color: var(--academy-ink);
  font-size: 21px;
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.12;
}

.course-description {
  min-height: 78px;
  margin: 0;
  color: var(--academy-muted);
  font-size: 15px;
  line-height: 1.55;
}

.course-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 16px;
}

.course-stat {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  border: 1px solid var(--academy-line);
  border-radius: 999px;
  color: var(--academy-muted);
  padding: 0 10px;
  font-size: 13px;
  line-height: 1;
}

.progress-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  margin-bottom: 32px;
}

.progress-track {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: color-mix(in srgb, var(--academy-ink) 10%, transparent);
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--academy-success);
}

.progress-label {
  color: var(--academy-muted);
  font-size: 13px;
  font-weight: 800;
}

.course-card .primary-btn {
  width: 100%;
  margin-top: auto;
}

.certificate-section {
  margin-top: 22px;
  border: 1px solid var(--academy-line);
  border-radius: 8px;
  background: var(--academy-surface);
  padding: 24px;
}

.certificate-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.certificate-status {
  color: var(--academy-muted);
  font-size: 13px;
  font-weight: 760;
}

.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.cert-card {
  border: 1px solid var(--academy-line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--academy-surface) 92%, var(--academy-green) 8%);
  padding: 18px;
}

.cert-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.cert-card p {
  margin: 0 0 14px;
  color: var(--academy-muted);
}

.empty-cert {
  color: var(--academy-muted);
}

@media (max-width: 1280px) {
  .course-grid {
    grid-template-columns: repeat(2, minmax(260px, 1fr));
  }
}

@media (max-width: 960px) {
  .catalog-main {
    margin-top: 12px;
    padding: 0 12px;
  }

  .intro-band {
    grid-template-columns: 1fr;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .course-grid {
    grid-template-columns: 1fr;
  }

  .course-card {
    min-height: auto;
  }

  .course-title {
    margin-bottom: 18px;
  }

  .course-description {
    min-height: 0;
  }

  .ghost-btn,
  .primary-btn {
    width: 100%;
  }
}