:root {
  --tda-ink: #182230;
  --tda-muted: #667085;
  --tda-line: #d5dce8;
  --tda-panel: #f7f9fc;
  --tda-soft: #eef3f8;
  --tda-blue: #1f4e79;
  --tda-teal: #1b7b7a;
  --tda-amber: #a66321;
  --tda-green: #28695b;
}

.md-header,
.md-tabs {
  box-shadow: 0 1px 0 rgba(23, 32, 51, 0.08);
}

.md-header {
  background: #172033;
}

.md-main {
  background: linear-gradient(180deg, #f6f8fb 0, #ffffff 220px);
}

.md-content {
  background: #fff;
}

.md-typeset {
  color: var(--tda-ink);
  font-size: .76rem;
  line-height: 1.62;
}

.md-typeset h1 {
  font-weight: 800;
  letter-spacing: 0;
  color: #142033;
  margin: .3rem 0 .95rem;
  font-size: clamp(1.45rem, 2.15vw, 1.95rem);
  line-height: 1.22;
}

.md-typeset h2 {
  margin-top: 1.9em;
  padding-bottom: .45rem;
  border-bottom: 1px solid var(--tda-line);
  font-weight: 750;
  color: #1b2b41;
}

.md-typeset h3 {
  font-weight: 700;
  color: #26364c;
}

.md-typeset p {
  margin-top: .7em;
  margin-bottom: .7em;
}

.tda-hero {
  position: relative;
  overflow: hidden;
  margin: 0 0 28px;
  padding: 36px 38px 32px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(23, 32, 51, .98), rgba(31, 78, 121, .95) 58%, rgba(27, 123, 122, .92)),
    #172033;
  color: #fff;
  box-shadow: 0 16px 44px rgba(23, 32, 51, .16);
}

.tda-hero::after {
  content: "";
  position: absolute;
  inset: auto -80px -100px auto;
  width: 260px;
  height: 220px;
  transform: rotate(-18deg);
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .04);
}

.tda-hero h1 {
  margin: 0 0 10px;
  color: #fff;
  font-size: clamp(2.05rem, 4vw, 3.2rem);
  letter-spacing: 0;
}

.tda-hero p {
  max-width: 820px;
  margin: .35rem 0;
  color: rgba(255, 255, 255, .88);
  font-size: 1.02rem;
}

.tda-hero .tda-hero-label {
  margin-bottom: 12px;
  color: rgba(255, 255, 255, .7);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.tda-hero .tda-hero-subtitle {
  color: #fff;
  font-size: 1.08rem;
  font-weight: 700;
}

.tda-hero .tda-hero-note {
  max-width: 720px;
  color: rgba(255, 255, 255, .76);
  font-size: .9rem;
}

.tda-hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 20px;
}

.tda-summary-card {
  min-height: 72px;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 6px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, .08);
}

.tda-summary-card strong,
.tda-summary-card span {
  display: block;
}

.tda-summary-card strong {
  color: #fff;
  font-size: .76rem;
  font-weight: 800;
  line-height: 1.3;
}

.tda-summary-card span {
  margin-top: 4px;
  color: rgba(255, 255, 255, .72);
  font-size: .68rem;
  line-height: 1.35;
}

.tda-section-lead {
  max-width: 880px;
  color: #4a5568;
  font-size: .92rem;
}

.tda-new-joiner {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  margin: 20px 0 28px;
  padding: 18px 20px;
  border: 1px solid #bfd2e4;
  border-left: 5px solid var(--tda-teal);
  border-radius: 8px;
  background: #f7fbfc;
  box-shadow: 0 8px 22px rgba(23, 32, 51, .055);
}

.tda-new-joiner h2 {
  margin: 0 0 6px;
  padding: 0;
  border: 0;
  color: #172033;
  font-size: 1.05rem;
}

.tda-new-joiner p {
  margin: .2rem 0;
  color: #3b4a5f;
  font-size: .86rem;
}

.tda-start-link {
  flex: 0 0 auto;
  border: 1px solid #aac3d8;
  border-radius: 6px;
  padding: 8px 12px;
  background: #fff;
  color: var(--tda-blue);
  font-size: .78rem;
  font-weight: 800;
}

.tda-lesson-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--tda-line);
}

.tda-lesson-nav__item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 74px;
  border: 1px solid #d5e0ea;
  border-radius: 8px;
  padding: 12px 14px;
  background: #f8fbfd;
  color: var(--tda-ink);
  text-decoration: none;
  transition: border-color .15s ease, box-shadow .15s ease, transform .15s ease;
}

.tda-lesson-nav__item:hover {
  border-color: #85b9c0;
  box-shadow: 0 8px 20px rgba(23, 32, 51, .08);
  transform: translateY(-1px);
}

.tda-lesson-nav__item span {
  color: var(--tda-muted);
  font-size: .68rem;
  font-weight: 800;
  text-transform: uppercase;
}

.tda-lesson-nav__item strong {
  margin-top: 4px;
  color: var(--tda-blue);
  font-size: .78rem;
  line-height: 1.35;
}

@media (max-width: 720px) {
  .tda-hero-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tda-new-joiner {
    align-items: flex-start;
    flex-direction: column;
  }

  .tda-start-link {
    width: 100%;
    text-align: center;
  }

  .tda-lesson-nav {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 440px) {
  .tda-hero-metrics {
    grid-template-columns: 1fr;
  }
}

.tda-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin: 22px 0;
}

.tda-card {
  min-height: 154px;
  border: 1px solid var(--tda-line);
  border-radius: 8px;
  padding: 18px 18px 16px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(23, 32, 51, .055);
}

.tda-card h3 {
  margin: 0 0 8px;
  color: #1d3550;
  font-size: .94rem;
  line-height: 1.35;
}

.tda-card p {
  margin: .35rem 0;
}

.tda-meta {
  color: var(--tda-muted);
  font-size: .82rem;
  line-height: 1.5;
}

.tda-module-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-bottom: 12px;
  border-radius: 5px;
  background: #e7f0f7;
  color: var(--tda-blue);
  font-size: .78rem;
  font-weight: 800;
}

.tda-course-map {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin: 22px 0;
}

.tda-course-item {
  border: 1px solid var(--tda-line);
  border-left: 4px solid var(--tda-blue);
  border-radius: 8px;
  padding: 16px 18px;
  background: #fff;
}

.tda-course-item strong {
  display: block;
  margin-bottom: 4px;
  color: #172033;
}

.tda-course-item span {
  display: block;
  color: var(--tda-muted);
  font-size: .82rem;
  line-height: 1.5;
}

.tda-principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin: 18px 0 24px;
}

.tda-principles span {
  border: 1px solid #cbd7e6;
  border-radius: 6px;
  padding: 10px 12px;
  background: #f8fbfd;
  color: #26364c;
  font-size: .82rem;
  font-weight: 700;
}

.tda-kpi {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  margin: 0 5px 14px 0;
  padding: 3px 8px;
  border: 1px solid #d6e1ee;
  border-radius: 6px;
  background: #f5f8fc;
  color: #315d85;
  font-size: .68rem;
  font-weight: 750;
  line-height: 1.25;
}

.tda-track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 20px 0;
}

.tda-authority-levels {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tda-track {
  border-left: 4px solid var(--tda-teal);
  border-radius: 8px;
  padding: 16px 16px 14px;
  background: var(--tda-panel);
}

.tda-track strong {
  color: var(--tda-ink);
}

.tda-track span {
  display: block;
  margin-top: 6px;
  color: var(--tda-muted);
  font-size: .9rem;
}

.tda-authority-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, .42fr);
  gap: 12px;
  align-items: start;
  margin: 26px 0 22px;
  padding: 20px 22px;
  border: 1px solid var(--tda-line);
  border-radius: 8px;
  background: linear-gradient(180deg, #f8fafc, #fff);
  box-shadow: 0 10px 28px rgba(23, 32, 51, .06);
}

.tda-authority-panel h2 {
  margin: 0 0 10px;
  padding: 0;
  border: 0;
  color: var(--tda-ink);
  font-size: 1.12rem;
  line-height: 1.35;
}

.tda-authority-panel p {
  margin: .35rem 0;
  color: var(--tda-muted);
  font-size: .82rem;
  line-height: 1.55;
}

.tda-eyebrow {
  color: var(--tda-teal) !important;
  font-size: .68rem !important;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.tda-authority-rule {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 5px;
  border-left: 4px solid var(--tda-teal);
  border-radius: 8px;
  padding: 14px 16px;
  background: #eef7f7;
}

.tda-authority-rule strong {
  flex: 0 0 auto;
  color: var(--tda-ink);
  font-size: .82rem;
}

.tda-authority-rule span {
  color: #435266;
  font-size: .82rem;
  line-height: 1.5;
}

.md-typeset table:not([class]) {
  border: 1px solid var(--tda-line);
  border-radius: 8px;
  box-shadow: 0 6px 18px rgba(23, 32, 51, .045);
}

.md-typeset table:not([class]) th {
  background: #edf3f8;
  color: var(--tda-ink);
  font-weight: 800;
}

.md-typeset table:not([class]) td {
  vertical-align: top;
}

.md-typeset blockquote {
  border-left-color: var(--tda-teal);
  color: #334155;
  background: #f8fbfd;
}

.md-typeset .admonition,
.md-typeset details {
  border-radius: 8px;
}

.md-typeset a.headerlink {
  opacity: 0;
  transition: opacity .15s ease;
}

.md-typeset :is(h1, h2, h3, h4, h5, h6):hover > a.headerlink,
.md-typeset a.headerlink:focus-visible {
  opacity: .45;
}

.md-top {
  right: 1rem;
  bottom: 1rem;
  left: auto;
  margin: 0;
}

@media (max-width: 600px) {
  .md-top {
    right: .75rem;
    bottom: .75rem;
  }
}

html:not(.tda-password-unlocked) .md-header,
html:not(.tda-password-unlocked) .md-container,
html:not(.tda-password-unlocked) .md-footer,
html:not(.tda-password-unlocked) .md-sidebar,
html:not(.tda-password-unlocked) .md-tabs {
  display: none !important;
}

.tda-password-gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at 20% 10%, rgba(14, 116, 144, .10), transparent 28%),
    linear-gradient(135deg, #f8fbfd 0%, #eef5f8 100%);
}

.tda-password-card {
  width: min(440px, 100%);
  border: 1px solid #d7e2ea;
  border-radius: 10px;
  padding: 30px;
  background: #fff;
  box-shadow: 0 18px 50px rgba(15, 23, 42, .14);
}

.tda-password-label {
  margin: 0 0 10px;
  color: #0f766e;
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.tda-password-card h1 {
  margin: 0 0 12px;
  color: #172033;
  font-size: 1.65rem;
  line-height: 1.2;
}

.tda-password-copy,
.tda-password-note {
  margin: 0 0 18px;
  color: #536171;
  font-size: .92rem;
  line-height: 1.55;
}

.tda-password-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.tda-password-input {
  min-width: 0;
  border: 1px solid #cbd8e3;
  border-radius: 8px;
  padding: 11px 12px;
  color: #172033;
  font: inherit;
}

.tda-password-input:focus {
  border-color: #0f766e;
  outline: 3px solid rgba(15, 118, 110, .14);
}

.tda-password-button {
  border: 0;
  border-radius: 8px;
  padding: 11px 16px;
  background: #172033;
  color: #fff;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.tda-password-button:hover {
  background: #243047;
}

.tda-password-error {
  min-height: 1.4em;
  margin: 12px 0 8px;
  color: #b42318;
  font-size: .86rem;
  font-weight: 700;
}

.tda-password-note {
  margin: 14px 0 0;
  color: #7a8796;
  font-size: .78rem;
}

@media (max-width: 520px) {
  .tda-password-card {
    padding: 24px;
  }

  .tda-password-form {
    grid-template-columns: 1fr;
  }
}

/* ========================================================================
   Dealing Room Academy institutional design system
   ======================================================================== */
:root,
[data-md-color-scheme="default"] {
  --academy-navy-950: #0b1424;
  --academy-navy-900: #111d31;
  --academy-navy-800: #1a2940;
  --academy-slate-700: #34445b;
  --academy-slate-500: #64748b;
  --academy-slate-300: #c5cfdb;
  --academy-surface: #f3f6fa;
  --academy-surface-elevated: #ffffff;
  --academy-border: #d7dee8;
  --academy-text: #172238;
  --academy-muted: #607086;
  --academy-accent: #167a89;
  --academy-accent-strong: #0f6572;
  --academy-success: #347a68;
  --academy-warning: #a36a20;
  --academy-danger: #a64b50;
  --academy-shadow: 0 10px 28px rgba(16, 30, 52, .07);
  --md-primary-fg-color: var(--academy-navy-900);
  --md-accent-fg-color: var(--academy-accent);
  --md-default-bg-color: var(--academy-surface);
  --md-default-fg-color: var(--academy-text);
  --md-typeset-a-color: var(--academy-accent-strong);
}

[data-md-color-scheme="slate"] {
  --academy-navy-950: #070d18;
  --academy-navy-900: #0d1727;
  --academy-navy-800: #17243a;
  --academy-slate-700: #a8b6c8;
  --academy-slate-500: #8392a7;
  --academy-slate-300: #405069;
  --academy-surface: #0b1321;
  --academy-surface-elevated: #111d2f;
  --academy-border: #26354a;
  --academy-text: #e8eef6;
  --academy-muted: #a3b0c1;
  --academy-accent: #58aeb8;
  --academy-accent-strong: #7dc3cb;
  --academy-success: #6ab09c;
  --academy-warning: #d1a45d;
  --academy-danger: #d27b80;
  --academy-shadow: 0 14px 34px rgba(0, 0, 0, .2);
  --md-primary-fg-color: var(--academy-navy-950);
  --md-accent-fg-color: var(--academy-accent);
  --md-default-bg-color: var(--academy-surface);
  --md-default-fg-color: var(--academy-text);
  --md-typeset-a-color: var(--academy-accent-strong);
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--academy-surface);
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--academy-accent) 42%, transparent);
  outline-offset: 3px;
}

/* Header and global navigation */
.md-header {
  min-height: 3.4rem;
  border-bottom: 1px solid color-mix(in srgb, var(--academy-slate-300) 35%, transparent);
  background: color-mix(in srgb, var(--academy-navy-950) 92%, transparent);
  box-shadow: none;
  backdrop-filter: blur(14px);
  transition: box-shadow .2s ease, background-color .2s ease;
}

.md-header.academy-header--scrolled {
  box-shadow: 0 8px 24px rgba(6, 14, 28, .18);
}

.md-header__button.md-logo {
  position: relative;
  margin-right: .65rem;
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  width: 1.5rem;
  height: 1.5rem;
}

.md-header__button.md-logo::after {
  content: "";
  position: absolute;
  right: .1rem;
  bottom: .2rem;
  width: .36rem;
  height: .36rem;
  border: 2px solid var(--academy-accent);
  transform: rotate(45deg);
}

.md-header__title {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.1;
}

.md-header__topic {
  font-family: inherit;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.1;
  white-space: nowrap;
  text-shadow: none;
  -webkit-text-stroke: 0;
  filter: none;
}

.md-header__topic::before,
.md-header__topic::after {
  content: none;
}

.md-header__ellipsis {
  line-height: inherit;
}

.md-search__form {
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 8px;
  background: rgba(255, 255, 255, .07);
  transition: border-color .18s ease, background-color .18s ease;
}

.md-search__form:focus-within {
  border-color: var(--academy-accent);
  background: rgba(255, 255, 255, .11);
}

.md-select__inner {
  border: 1px solid var(--academy-border);
  border-radius: 8px;
  background: var(--academy-surface-elevated);
  box-shadow: var(--academy-shadow);
}

/* Page frame and reading typography */
.md-main {
  background: var(--academy-surface);
}

.md-content {
  background: transparent;
}

.md-content__inner {
  max-width: 920px;
  margin-inline: auto;
  padding-top: 1.4rem;
}

.academy-home-page .md-content__inner {
  max-width: 1120px;
}

.md-typeset {
  color: var(--academy-text);
  font-size: .79rem;
  line-height: 1.72;
}

.md-typeset h1 {
  position: relative;
  margin: .65rem 0 1.65rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--academy-border);
  color: var(--academy-text);
  font-size: 2rem;
  font-weight: 780;
  line-height: 1.18;
}

.md-typeset h1::before {
  content: attr(data-academy-eyebrow);
  display: block;
  min-height: .8rem;
  margin-bottom: .48rem;
  color: var(--academy-accent);
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.academy-home .md-typeset h1::before,
.academy-home h1::before {
  content: none;
}

.md-typeset h2 {
  position: relative;
  margin: 2.35rem 0 1rem;
  padding: 0 0 .58rem .8rem;
  border-bottom: 1px solid var(--academy-border);
  color: var(--academy-text);
  font-size: 1.28rem;
  font-weight: 760;
  line-height: 1.3;
}

.md-typeset h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .15rem;
  width: 3px;
  height: 1.05rem;
  border-radius: 2px;
  background: var(--academy-accent);
}

.md-typeset h3 {
  margin: 1.65rem 0 .65rem;
  color: var(--academy-text);
  font-size: .98rem;
  font-weight: 700;
}

.md-typeset p,
.md-typeset li {
  color: var(--academy-text);
}

.md-typeset a.headerlink {
  opacity: 0;
  color: var(--academy-accent);
}

.md-typeset :is(h1, h2, h3):hover > a.headerlink,
.md-typeset a.headerlink:focus-visible {
  opacity: .55;
}

/* Tables, quotes, code and structured content */
.md-typeset .md-typeset__table {
  margin: 1rem 0 1.5rem;
  border: 1px solid var(--academy-border);
  border-radius: 8px;
  background: var(--academy-surface-elevated);
  box-shadow: var(--academy-shadow);
  overflow-x: auto;
}

.md-typeset table:not([class]) {
  min-width: 100%;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.md-typeset table:not([class]) th {
  position: sticky;
  top: 0;
  z-index: 1;
  border-bottom: 1px solid var(--academy-border);
  background: color-mix(in srgb, var(--academy-surface-elevated) 82%, var(--academy-slate-300));
  color: var(--academy-text);
}

.md-typeset table:not([class]) tbody tr:nth-child(even) {
  background: color-mix(in srgb, var(--academy-surface) 62%, transparent);
}

.md-typeset table:not([class]) :is(th, td) {
  border-color: var(--academy-border);
}

.md-typeset blockquote {
  margin: 1.2rem 0;
  border: 1px solid var(--academy-border);
  border-left: 3px solid var(--academy-accent);
  border-radius: 8px;
  padding: .9rem 1rem;
  background: var(--academy-surface-elevated);
  color: var(--academy-text);
  box-shadow: 0 6px 18px rgba(16, 30, 52, .045);
}

.md-typeset div.highlight,
.md-typeset pre {
  border-color: color-mix(in srgb, var(--academy-border) 75%, var(--academy-navy-800));
  background: var(--academy-navy-950);
  box-shadow: var(--academy-shadow);
}

.md-typeset pre > code {
  color: #dbe6f3;
}

.md-typeset .admonition,
.md-typeset details {
  border: 1px solid var(--academy-border);
  border-left-width: 3px;
  background: var(--academy-surface-elevated);
  box-shadow: 0 6px 18px rgba(16, 30, 52, .045);
}

.mermaid,
.tda-diagram,
.tda-flow {
  border-color: var(--academy-border);
  background: var(--academy-surface-elevated);
  box-shadow: var(--academy-shadow);
}

.tda-diagram-node,
.tda-flow-step {
  border-color: var(--academy-border);
  background: color-mix(in srgb, var(--academy-surface-elevated) 78%, var(--academy-accent));
  color: var(--academy-text);
}

/* Side navigation and table of contents */
.md-sidebar__scrollwrap {
  scrollbar-width: thin;
  scrollbar-color: var(--academy-slate-300) transparent;
}

.md-nav__title {
  color: var(--academy-text);
  font-weight: 760;
}

.md-nav__item .md-nav__link {
  margin-top: .28rem;
  border-left: 2px solid transparent;
  border-radius: 0 6px 6px 0;
  padding: .35rem .45rem;
  color: var(--academy-muted);
  line-height: 1.38;
  transition: color .15s ease, background-color .15s ease, border-color .15s ease;
}

.md-nav__item .md-nav__link:hover,
.md-nav__link:focus-visible {
  color: var(--academy-text);
  background: color-mix(in srgb, var(--academy-accent) 7%, transparent);
}

.md-nav__link--active,
.md-nav__link[aria-current="page"] {
  border-left-color: var(--academy-accent) !important;
  background: color-mix(in srgb, var(--academy-accent) 10%, transparent) !important;
  color: var(--academy-accent-strong) !important;
  font-weight: 700;
}

.md-sidebar--secondary .md-nav__title::after {
  content: "On this page";
  font-size: .66rem;
}

html[lang^="zh"] .md-sidebar--secondary .md-nav__title::after {
  content: "本页内容";
}

.md-sidebar--secondary .md-nav__title {
  font-size: 0;
}

.md-sidebar--secondary .md-nav__link {
  border-left: 1px solid var(--academy-border);
  border-radius: 0;
  font-size: .66rem;
}

/* Homepage */
.academy-home-page .md-sidebar--secondary {
  display: none;
}

.academy-home {
  color: var(--academy-text);
}

.academy-home > h2 {
  margin-top: 2.8rem;
}

.academy-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 1.3rem;
  overflow: hidden;
  margin: 0 0 1rem;
  padding: 2.45rem 2.4rem 2.1rem;
  border: 1px solid #27374e;
  background: var(--academy-navy-950);
  color: #fff;
}

.academy-hero__content,
.academy-readiness {
  position: relative;
  z-index: 1;
}

.academy-eyebrow {
  margin: 0 0 .65rem !important;
  color: var(--academy-accent-strong) !important;
  font-size: .63rem !important;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.academy-hero .academy-eyebrow {
  color: #79c1ca !important;
}

.academy-hero h1 {
  max-width: 680px;
  margin: 0 0 .75rem;
  padding: 0;
  border: 0;
  color: #fff;
  font-size: 2.15rem;
  line-height: 1.08;
}

.academy-hero__subtitle {
  max-width: 700px;
  margin: 0 0 .7rem !important;
  color: #f2f6fb !important;
  font-size: 1.04rem;
  font-weight: 680;
  line-height: 1.45;
}

.academy-hero__copy {
  max-width: 690px;
  margin: 0 !important;
  color: #b8c5d5 !important;
  font-size: .82rem;
  line-height: 1.65;
}

.academy-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1.35rem;
}

.academy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: .55rem .85rem;
  font-size: .72rem;
  font-weight: 760;
  text-decoration: none;
  transition: border-color .18s ease, background-color .18s ease, transform .18s ease;
}

.academy-button span {
  margin-left: .45rem;
  transition: transform .18s ease;
}

.academy-button:hover span,
.academy-button:focus-visible span {
  transform: translateX(3px);
}

.academy-button--primary {
  background: var(--academy-accent);
  color: #fff !important;
}

.academy-button--primary:hover {
  background: var(--academy-accent-strong);
}

.academy-button--secondary {
  border-color: #41536c;
  background: transparent;
  color: #e7edf5 !important;
}

.academy-button--secondary:hover {
  border-color: #73859b;
  background: rgba(255,255,255,.055);
}

.academy-hero__principle {
  margin: 1.4rem 0 0 !important;
  color: #8fa1b7 !important;
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: 0;
}

.academy-hero__principle span {
  margin: 0 .35rem;
  color: #58aeb8;
}

.academy-readiness {
  align-self: center;
  border: 1px solid #34465e;
  border-radius: 8px;
  padding: 1rem;
  background: #111d31;
  box-shadow: 0 18px 40px rgba(0,0,0,.18);
}

.academy-readiness__header {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .15rem .1rem .8rem;
  border-bottom: 1px solid #2b3b52;
  color: #9eafc3;
  font-size: .6rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.academy-brand-mark {
  display: inline-block;
  width: .72rem;
  height: .72rem;
  border: 2px solid #58aeb8;
  transform: rotate(45deg);
}

.academy-readiness ol {
  margin: .65rem 0 0;
  padding: 0;
  list-style: none;
}

.academy-readiness li {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  align-items: center;
  min-height: 2.1rem;
  border-bottom: 1px solid #223149;
  color: #eff4fa;
}

.academy-readiness li:last-child {
  border-bottom: 0;
}

.academy-readiness li span {
  color: #58aeb8;
  font-family: var(--md-code-font-family);
  font-size: .64rem;
}

.academy-readiness li strong {
  font-size: .73rem;
  font-weight: 650;
}

.academy-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .75rem;
  margin: 1rem 0 1.6rem;
}

.academy-stat {
  position: relative;
  min-height: 6.2rem;
  border: 1px solid var(--academy-border);
  border-radius: 8px;
  padding: 1rem;
  background: var(--academy-surface-elevated);
  box-shadow: 0 5px 16px rgba(16,30,52,.04);
  transition: border-color .18s ease, transform .18s ease;
}

.academy-stat::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: var(--academy-accent);
}

.academy-stat:hover {
  border-color: color-mix(in srgb, var(--academy-accent) 48%, var(--academy-border));
  transform: translateY(-3px);
}

.academy-stat strong,
.academy-stat span {
  display: block;
}

.academy-stat strong {
  color: var(--academy-text);
  font-family: var(--md-code-font-family);
  font-size: 1.55rem;
  line-height: 1.1;
}

.academy-stat span {
  margin-top: .55rem;
  color: var(--academy-muted);
  font-size: .68rem;
  line-height: 1.35;
}

.academy-onboarding {
  display: grid;
  grid-template-columns: minmax(230px, .62fr) minmax(0, 1.38fr);
  gap: 1.5rem;
  margin: 1.7rem 0 2.6rem;
  border: 1px solid var(--academy-border);
  border-left: 3px solid var(--academy-accent);
  border-radius: 8px;
  padding: 1.45rem;
  background: var(--academy-surface-elevated);
  box-shadow: var(--academy-shadow);
}

.academy-onboarding h2,
.academy-governance h2 {
  margin: 0 0 .5rem;
  padding: 0;
  border: 0;
  font-size: 1.15rem;
}

.academy-onboarding h2::before,
.academy-governance h2::before {
  content: none;
}

.academy-onboarding__intro > p:not(.academy-eyebrow) {
  color: var(--academy-muted);
  font-size: .75rem;
}

.academy-onboarding__intro .academy-button {
  margin-top: .6rem;
}

.academy-path {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  align-items: center;
  margin-bottom: 1rem;
}

.academy-path span {
  border: 1px solid var(--academy-border);
  border-radius: 6px;
  padding: .38rem .55rem;
  background: var(--academy-surface);
  color: var(--academy-text);
  font-size: .66rem;
  font-weight: 700;
}

.academy-path i {
  color: var(--academy-accent);
  font-style: normal;
}

.academy-outcome-title {
  margin-bottom: .35rem !important;
  color: var(--academy-text) !important;
  font-size: .7rem;
  font-weight: 750;
}

.academy-check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .28rem 1rem;
  margin: .4rem 0 .85rem !important;
  padding: 0 !important;
  list-style: none !important;
}

.academy-check-list li {
  position: relative;
  padding-left: 1rem;
  color: var(--academy-muted);
  font-size: .68rem;
}

.academy-check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--academy-success);
  font-weight: 800;
}

.academy-authority-tag,
.academy-internal-label {
  display: inline-flex;
  border: 1px solid color-mix(in srgb, var(--academy-warning) 35%, var(--academy-border));
  border-radius: 999px;
  padding: .24rem .5rem;
  background: color-mix(in srgb, var(--academy-warning) 7%, var(--academy-surface-elevated));
  color: var(--academy-warning);
  font-size: .58rem;
  font-weight: 750;
}

.academy-module-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .85rem;
  margin: 1.1rem 0 2rem;
}

.academy-module {
  position: relative;
  display: flex;
  min-height: 14.5rem;
  flex-direction: column;
  border: 1px solid var(--academy-border);
  border-radius: 8px;
  padding: 1.15rem;
  background: var(--academy-surface-elevated);
  color: var(--academy-text) !important;
  text-decoration: none;
  box-shadow: 0 5px 18px rgba(16,30,52,.045);
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.academy-module:hover,
.academy-module:focus-visible {
  border-color: var(--academy-accent);
  box-shadow: var(--academy-shadow);
  transform: translateY(-3px);
}

.academy-module__number {
  color: var(--academy-accent);
  font-family: var(--md-code-font-family);
  font-size: .65rem;
  font-weight: 800;
}

.academy-module__icon {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: grid;
  width: 1.75rem;
  height: 1.75rem;
  place-items: center;
  border: 1px solid var(--academy-border);
  border-radius: 6px;
  color: var(--academy-accent);
  font-size: .78rem;
}

.academy-module h3 {
  margin: 1.3rem 0 .5rem;
  color: var(--academy-text);
  font-size: .92rem;
}

.academy-module p {
  margin: 0;
  color: var(--academy-muted);
  font-size: .68rem;
  line-height: 1.55;
}

.academy-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  margin-top: .9rem;
}

.academy-tags span {
  border: 1px solid var(--academy-border);
  border-radius: 5px;
  padding: .17rem .35rem;
  color: var(--academy-muted);
  font-size: .54rem;
  font-weight: 650;
}

.academy-module__link {
  margin-top: auto;
  padding-top: .9rem;
  color: var(--academy-accent-strong);
  font-size: .63rem;
}

.academy-reference-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .9rem;
  margin: 1.1rem 0 2rem;
}

.academy-reference {
  min-height: 10rem;
  border: 1px solid var(--academy-border);
  border-radius: 8px;
  padding: 1.35rem;
  background: var(--academy-surface-elevated);
  box-shadow: 0 5px 18px rgba(16,30,52,.045);
}

.academy-reference--controlled {
  border-top: 2px solid var(--academy-warning);
}

.academy-reference--controlled > div {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}

.academy-reference h3 {
  margin: .45rem 0;
  color: var(--academy-text);
  font-size: 1rem;
}

.academy-reference p:not(.academy-eyebrow) {
  max-width: 520px;
  color: var(--academy-muted);
  font-size: .72rem;
}

.academy-text-link {
  color: var(--academy-accent-strong) !important;
  font-size: .66rem;
  font-weight: 760;
}

.academy-governance {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: 1rem;
  align-items: start;
  margin: 2rem 0 2.6rem;
  border: 1px solid #304058;
  border-radius: 8px;
  padding: 1.35rem;
  background: var(--academy-navy-900);
  box-shadow: var(--academy-shadow);
}

.academy-governance__icon {
  display: grid;
  width: 2.3rem;
  height: 2.3rem;
  place-items: center;
  border: 1px solid #4d6079;
  border-radius: 7px;
  color: #6fc0c8;
  font-weight: 850;
}

.academy-governance h2 {
  color: #f2f6fb;
}

.academy-governance p:not(.academy-eyebrow) {
  margin: 0;
  color: #afbdcd;
  font-size: .72rem;
}

/* Lesson navigation and footer */
.tda-lesson-nav {
  gap: .75rem;
}

.tda-lesson-nav__item {
  position: relative;
  border-color: var(--academy-border);
  background: var(--academy-surface-elevated);
  color: var(--academy-text);
  box-shadow: 0 5px 16px rgba(16,30,52,.04);
}

.tda-lesson-nav__item::after {
  content: "→";
  position: absolute;
  right: .75rem;
  color: var(--academy-accent);
  font-size: .85rem;
}

.tda-lesson-nav__item:first-child::after {
  content: "←";
}

.tda-lesson-nav__item:hover,
.tda-lesson-nav__item:focus-visible {
  border-color: var(--academy-accent);
  transform: translateY(-2px);
}

.tda-lesson-nav__item strong {
  padding-right: 1rem;
  color: var(--academy-accent-strong);
}

.md-footer {
  border-top: 1px solid var(--academy-border);
  background: var(--academy-navy-950);
}

.md-footer-meta {
  background: var(--academy-navy-950);
}

.academy-footer-update {
  margin-left: .5rem;
  color: #8392a7;
  font-size: .58rem;
}

.academy-footer-brand {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
  max-width: none;
}

.academy-footer-brand__identity,
.academy-footer-brand__meta {
  display: grid;
  gap: .18rem;
}

.academy-footer-brand__identity strong {
  color: #f4f7fb;
  font-size: .7rem;
}

.academy-footer-brand__identity span,
.academy-footer-brand__meta span {
  color: #aeb9c8;
  font-size: .58rem;
}

.academy-footer-brand__meta {
  justify-items: end;
  text-align: right;
}

.academy-footer-brand__meta a {
  color: #c8d2df;
}

/* Responsive behavior */
@media screen and (max-width: 1100px) {
  .academy-hero {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 1rem;
    padding: 2rem 1.7rem 1.7rem;
  }

  .academy-hero h1 {
    font-size: 1.85rem;
  }

  .academy-module-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 800px) {
  .md-header__topic {
    font-size: .95rem;
  }

  .md-content__inner {
    padding-top: 1rem;
  }

  .academy-hero {
    grid-template-columns: 1fr;
    padding: 2.1rem 1.6rem 1.7rem;
  }

  .academy-readiness {
    max-width: none;
  }

  .academy-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .academy-onboarding {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 480px) {
  .md-header__button.md-logo {
    margin-right: .45rem;
  }

  .md-header__topic {
    font-size: .85rem;
  }
}

@media screen and (max-width: 600px) {
  .academy-footer-brand {
    grid-template-columns: 1fr;
  }

  .academy-footer-brand,
  .academy-footer-brand__meta {
    display: grid;
    justify-items: start;
    text-align: left;
  }

  .academy-footer-update {
    margin-left: 0;
  }

  .md-typeset__scrollwrap,
  .md-typeset .highlight {
    margin-right: 0;
    margin-left: 0;
  }

  .md-typeset__table,
  .md-typeset .highlight,
  .md-typeset pre {
    max-width: 100%;
  }

  .md-typeset h1 {
    font-size: 1.55rem;
  }

  .md-typeset h2 {
    font-size: 1.12rem;
  }

  .academy-hero {
    margin-inline: 0;
    padding: 1.7rem 1.1rem 1.45rem;
  }

  .academy-hero h1 {
    font-size: 1.65rem;
  }

  .academy-hero__subtitle {
    font-size: .8rem;
  }

  .academy-actions,
  .academy-actions .academy-button {
    width: 100%;
  }

  .academy-stats,
  .academy-module-grid,
  .academy-reference-grid,
  .academy-check-list {
    grid-template-columns: 1fr;
  }

  .academy-stat {
    min-height: 5.2rem;
  }

  .academy-onboarding,
  .academy-reference,
  .academy-governance {
    padding: 1rem;
  }

  .academy-path {
    align-items: stretch;
    flex-direction: column;
  }

  .academy-path i {
    align-self: center;
    transform: rotate(90deg);
  }

  .academy-module {
    min-height: 13rem;
  }

  .academy-governance {
    grid-template-columns: 1fr;
  }

  .md-typeset .md-typeset__table {
    margin-inline: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}