:root {
  --academy-bg: #061015;
  --academy-panel: #0b1b22;
  --academy-panel-strong: #10252d;
  --academy-line: rgba(132, 219, 194, .2);
  --academy-text: #eef7f4;
  --academy-muted: #a9c0ba;
  --academy-mint: #72e1ba;
  --academy-mint-dark: #073b2e;
  --academy-gold: #f3ca72;
  --academy-danger: #ff9e9e;
  --academy-focus: #ffe09a;
  --academy-radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.academy-page {
  margin: 0;
  color: var(--academy-text);
  background:
    radial-gradient(circle at 15% 0%, rgba(46, 145, 118, .16), transparent 35rem),
    linear-gradient(180deg, #07151b 0%, var(--academy-bg) 44rem);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body.academy-page a { color: inherit; }

.academy-skip-link {
  position: fixed;
  z-index: 100;
  top: .75rem;
  left: .75rem;
  padding: .7rem 1rem;
  color: #04110d;
  background: var(--academy-focus);
  border-radius: 10px;
  transform: translateY(-160%);
}

.academy-skip-link:focus { transform: translateY(0); }

.academy-site-header,
.academy-main,
.academy-footer {
  width: min(1180px, calc(100% - 2rem));
  margin-inline: auto;
}

.academy-site-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  border-bottom: 1px solid var(--academy-line);
}

.academy-brand {
  font-weight: 800;
  letter-spacing: .13em;
  text-decoration: none;
  white-space: nowrap;
}

.academy-brand b { color: var(--academy-mint); }

.academy-public-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: .4rem;
}

.academy-public-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: .55rem .8rem;
  color: var(--academy-muted);
  border-radius: 10px;
  text-decoration: none;
}

.academy-public-nav a:hover { color: var(--academy-text); background: rgba(255,255,255,.05); }
.academy-public-nav .academy-nav-action { color: var(--academy-text); border: 1px solid var(--academy-line); }

.academy-main { padding-block: clamp(2rem, 6vw, 5.5rem); }

.academy-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, .75fr);
  align-items: center;
  gap: clamp(1.5rem, 5vw, 4rem);
  min-height: 31rem;
}

.academy-eyebrow,
.academy-card-label {
  margin: 0 0 .65rem;
  color: var(--academy-mint);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: .12em;
}

.academy-hero h1 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.6rem);
  line-height: .98;
  letter-spacing: -.05em;
}

.academy-lede {
  max-width: 720px;
  margin: 1.5rem 0 0;
  color: var(--academy-muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.academy-actions,
.academy-status-actions,
.academy-complete-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: .75rem;
}

.academy-actions { margin-top: 1.8rem; }

.academy-page .button,
.academy-page button {
  min-height: 44px;
  font: inherit;
}

.academy-page .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: .68rem 1rem;
  color: var(--academy-text);
  background: transparent;
  border: 1px solid var(--academy-line);
  border-radius: 12px;
  cursor: pointer;
  text-decoration: none;
}

.academy-page .button:hover:not(:disabled) { background: rgba(114, 225, 186, .09); border-color: rgba(114, 225, 186, .55); }
.academy-page .button.primary { color: #03150f; background: var(--academy-mint); border-color: var(--academy-mint); font-weight: 800; }
.academy-page .button.primary:hover:not(:disabled) { background: #99edcf; }
.academy-page .button.subtle { color: var(--academy-muted); }
.academy-page .button:disabled { opacity: .55; cursor: not-allowed; }

.academy-page :where(a, button, input, textarea):focus-visible {
  outline: 3px solid var(--academy-focus);
  outline-offset: 3px;
}

.academy-safety-card,
.academy-status-panel,
.academy-workspace,
.academy-evidence,
.academy-method,
.academy-labs,
.academy-sources {
  border: 1px solid var(--academy-line);
  border-radius: var(--academy-radius);
  background: linear-gradient(145deg, rgba(16, 37, 45, .96), rgba(8, 25, 31, .96));
  box-shadow: 0 24px 70px rgba(0, 0, 0, .18);
}

.academy-safety-card { padding: clamp(1.25rem, 4vw, 2rem); }
.academy-safety-card h2 { margin: 0 0 .7rem; font-size: 1.55rem; }
.academy-safety-card p:last-child { margin-bottom: 0; color: var(--academy-muted); }

.academy-status-panel {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(260px, 1fr) auto;
  gap: 1.5rem;
  align-items: center;
  margin-block: 2rem 5rem;
  padding: clamp(1.2rem, 3vw, 2rem);
}

.academy-status-panel h2 { margin: 0; }
.academy-status-panel p { margin: .35rem 0 0; color: var(--academy-muted); }
.academy-progress-wrap { min-width: 0; }

.academy-progress-track {
  height: 12px;
  overflow: hidden;
  background: #041116;
  border: 1px solid var(--academy-line);
  border-radius: 999px;
}

.academy-progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--academy-mint), var(--academy-gold));
  transition: width .25s ease;
}

.academy-progress-label { margin-top: .5rem; font-weight: 800; }
.academy-status-panel .academy-review-status { color: var(--academy-gold); font-size: .92rem; }
.academy-status-actions { flex-direction: column; align-items: stretch; }
.academy-status-panel .academy-privacy-note { grid-column: 1 / -1; font-size: .88rem; }

.academy-paths { scroll-margin-top: 1rem; }
.academy-section-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 1.4rem; }
.academy-section-heading h2,
.academy-evidence h2,
.academy-method h2,
.academy-labs h2,
.academy-sources h2 { margin: 0; font-size: clamp(1.8rem, 4vw, 3rem); line-height: 1.08; }
.academy-section-heading p:last-child { max-width: 760px; color: var(--academy-muted); }

.academy-filter { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .45rem; }
.academy-filter-button {
  padding: .55rem .85rem;
  color: var(--academy-muted);
  background: transparent;
  border: 1px solid var(--academy-line);
  border-radius: 999px;
  cursor: pointer;
}
.academy-filter-button:hover,
.academy-filter-button.is-active { color: #03150f; background: var(--academy-mint); border-color: var(--academy-mint); }

.academy-lesson-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.academy-lesson-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 300px;
  padding: 1.35rem;
  border: 1px solid var(--academy-line);
  border-radius: 16px;
  background: rgba(8, 24, 30, .82);
}

.academy-lesson-card[hidden] { display: none; }
.academy-lesson-card h3 { margin: .35rem 0 .65rem; font-size: 1.35rem; line-height: 1.2; }
.academy-lesson-card p { margin: 0 0 1rem; color: var(--academy-muted); }
.academy-lesson-card .button { width: 100%; margin-top: auto; }
.academy-lesson-meta { display: flex; justify-content: space-between; gap: .75rem; color: var(--academy-muted); font-size: .82rem; }
.academy-status-chip { color: var(--academy-text); font-weight: 800; }
.academy-status-chip.is-complete { color: var(--academy-mint); }
.academy-status-chip.is-review { color: var(--academy-gold); }

.academy-workspace {
  margin-block: 4rem;
  padding: clamp(1.1rem, 4vw, 3rem);
  scroll-margin-top: 1rem;
}
.academy-workspace[hidden] { display: none; }
.academy-workspace-toolbar { display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.academy-workspace h2 { max-width: 860px; margin: .35rem 0 .75rem; font-size: clamp(2rem, 5vw, 4rem); line-height: 1; }
.academy-objective { max-width: 820px; color: var(--academy-muted); font-size: 1.15rem; }
.academy-lesson-content { display: grid; grid-template-columns: 1.35fr .85fr; gap: 1.25rem; margin-top: 2rem; }
.academy-lesson-copy,
.academy-worked-example,
.academy-buddy-note,
.academy-practice,
.academy-notes {
  padding: 1.25rem;
  border: 1px solid var(--academy-line);
  border-radius: 14px;
  background: rgba(4, 18, 23, .7);
}
.academy-lesson-copy { grid-row: span 2; }
.academy-lesson-copy h3,
.academy-worked-example h3,
.academy-buddy-note h3,
.academy-practice h3,
.academy-notes h3 { margin-top: 0; }
.academy-key-points { padding-left: 1.3rem; }
.academy-key-points li + li { margin-top: .65rem; }
.academy-buddy-note { border-left: 4px solid var(--academy-mint); }
.academy-worked-example { border-left: 4px solid var(--academy-gold); }
.academy-source-links { margin-top: 1.3rem; padding-top: 1rem; border-top: 1px solid var(--academy-line); }
.academy-source-links a { color: var(--academy-mint); }

.academy-practice,
.academy-notes { margin-top: 1rem; }
.academy-practice fieldset { margin: 0 0 1rem; padding: 0; border: 0; }
.academy-practice legend { margin-bottom: .85rem; font-weight: 800; font-size: 1.08rem; }
.academy-quiz-options { display: grid; gap: .6rem; }
.academy-quiz-option { display: flex; align-items: flex-start; gap: .65rem; padding: .75rem; border: 1px solid var(--academy-line); border-radius: 11px; cursor: pointer; }
.academy-quiz-option:has(input:checked) { background: rgba(114, 225, 186, .1); border-color: var(--academy-mint); }
.academy-quiz-option input { width: 20px; height: 20px; margin-top: .15rem; accent-color: var(--academy-mint); }
.academy-feedback { min-height: 1.6rem; margin-top: .9rem; font-weight: 700; }
.academy-feedback.is-correct { color: var(--academy-mint); }
.academy-feedback.is-incorrect { color: var(--academy-danger); }

.academy-notes label { display: block; margin-bottom: .7rem; color: var(--academy-muted); }
.academy-notes textarea {
  width: 100%;
  resize: vertical;
  padding: .85rem;
  color: var(--academy-text);
  background: #041116;
  border: 1px solid var(--academy-line);
  border-radius: 11px;
  font: inherit;
}
.academy-save-status { color: var(--academy-muted); font-size: .85rem; }
.academy-complete-row { justify-content: space-between; margin-top: 1rem; }
.academy-complete-row p { color: var(--academy-muted); }

.academy-evidence,
.academy-method,
.academy-labs,
.academy-sources { margin-top: 5rem; padding: clamp(1.25rem, 4vw, 3rem); scroll-margin-top: 1rem; }
.academy-evidence-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; padding: 0; margin: 2rem 0 0; list-style: none; counter-reset: none; }
.academy-evidence-grid li,
.academy-method-grid article,
.academy-lab-grid article,
.academy-source-card { padding: 1rem; border: 1px solid var(--academy-line); border-radius: 12px; background: rgba(4, 18, 23, .62); }
.academy-evidence-grid b,
.academy-evidence-grid span { display: block; }
.academy-evidence-grid span { margin-top: .4rem; color: var(--academy-muted); }
.academy-method-grid,
.academy-lab-grid,
.academy-source-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; margin-top: 1.5rem; }
.academy-method-grid article p,
.academy-lab-grid article p,
.academy-source-card p { color: var(--academy-muted); }
.academy-lab-grid article { display: flex; flex-direction: column; }
.academy-lab-grid .button { margin-top: auto; }
.academy-source-card h3 { margin: 0; font-size: 1rem; }
.academy-source-card a { color: var(--academy-mint); }
.academy-source-card small { display: block; margin-top: .6rem; color: var(--academy-muted); }
.academy-rights-note { margin-top: 1rem; padding: 1.2rem; border: 1px solid rgba(243, 202, 114, .35); border-radius: 12px; background: rgba(69, 50, 13, .18); }
.academy-rights-note h3 { margin-top: 0; }
.academy-rights-note p { margin-bottom: 0; }

.academy-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 2rem 3rem;
  color: var(--academy-muted);
  border-top: 1px solid var(--academy-line);
  font-size: .88rem;
}

@media (max-width: 900px) {
  .academy-hero,
  .academy-status-panel,
  .academy-lesson-content { grid-template-columns: 1fr; }
  .academy-status-actions { flex-direction: row; }
  .academy-section-heading { align-items: flex-start; flex-direction: column; }
  .academy-filter { justify-content: flex-start; }
  .academy-lesson-grid,
  .academy-evidence-grid,
  .academy-method-grid,
  .academy-lab-grid,
  .academy-source-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .academy-lesson-copy { grid-row: auto; }
}

@media (max-width: 650px) {
  html { scroll-behavior: auto; }
  .academy-site-header { align-items: flex-start; flex-direction: column; padding-block: 1rem; }
  .academy-public-nav { justify-content: flex-start; }
  .academy-public-nav a { padding-inline: .55rem; }
  .academy-hero { min-height: 0; padding-block: 2.5rem; }
  .academy-lesson-grid,
  .academy-evidence-grid,
  .academy-method-grid,
  .academy-lab-grid,
  .academy-source-grid { grid-template-columns: 1fr; }
  .academy-workspace-toolbar,
  .academy-footer { align-items: flex-start; flex-direction: column; }
  .academy-status-actions .button,
  .academy-actions .button,
  .academy-complete-row .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  body.academy-page { color: #111; background: #fff; }
  .academy-site-header,
  .academy-filter,
  .academy-actions,
  .academy-status-actions,
  .academy-workspace-toolbar,
  .academy-complete-row,
  .academy-footer { display: none !important; }
  .academy-safety-card,
  .academy-status-panel,
  .academy-workspace,
  .academy-evidence,
  .academy-method,
  .academy-labs,
  .academy-sources,
  .academy-lesson-card { color: #111; background: #fff; border-color: #bbb; box-shadow: none; }
  .academy-page p,
  .academy-page span { color: #222 !important; }
}