:root {
  color-scheme: light dark;
  --accent-text: #075898;
  --on-dark: #ffffff;
  --on-dark-muted: rgba(255, 255, 255, 0.82);
}

.theme-control {
  display: inline-grid;
  flex: 0 0 auto;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.18rem;
  width: 7rem;
  min-height: 3.7rem;
  padding: 0.3rem;
  border: 1px solid var(--line, rgba(7, 88, 152, 0.2));
  border-radius: 16px;
  background: var(--paper, rgba(255, 255, 255, 0.92));
  color: var(--muted, #334155);
  font: 700 0.78rem/1 "IBM Plex Sans", Arial, sans-serif;
}

.theme-control-label {
  padding: 0.08rem 0.35rem 0;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.theme-control select {
  width: 100%;
  min-height: 2.05rem;
  padding: 0.25rem 1.45rem 0.25rem 0.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--bg-soft, #f4f7fa);
  color: var(--ink, #071c35);
  cursor: pointer;
  font: inherit;
}

.theme-control select:hover {
  border-color: var(--line-strong, #2a95d0);
  background: var(--surface-hover, #d8e3ef);
}

.theme-control select:active {
  background: var(--line, #d8e3ef);
}

.theme-control select:focus-visible {
  outline: 3px solid var(--sky, #2a95d0);
  outline-offset: 2px;
}

html[data-color-scheme="dark"] {
  --bg: #071c35;
  --bg-alt: #0a1835;
  --bg-soft: #0a1835;
  --surface-hover: #334155;
  --paper: #0a1835;
  --paper-soft: #071c35;
  --pearl: #334155;
  --ink: #ffffff;
  --muted: #d8e3ef;
  --line: #334155;
  --line-strong: #57bfff;
  --slate: #d8e3ef;
  --navy-soft: #0a1835;
  --blue: #075898;
  --blue-strong: #57bfff;
  --accent-text: #57bfff;
  --sky: #2a95d0;
  --cyan: #21c7d4;
  --teal: #21c7d4;
  --shadow: 0 16px 36px rgba(0, 0, 0, 0.3);
  --shadow-header: 0 14px 34px rgba(0, 0, 0, 0.38);
  --shadow-selected: 0 5px 14px rgba(0, 0, 0, 0.32);
  --card-shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
  color-scheme: dark;
}

html[data-color-scheme="dark"] body {
  color: var(--ink) !important;
  background:
    linear-gradient(rgba(87, 191, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(87, 191, 255, 0.045) 1px, transparent 1px),
    radial-gradient(circle at 88% 8%, rgba(33, 199, 212, 0.1), transparent 24rem),
    radial-gradient(circle at 8% 34%, rgba(42, 149, 208, 0.08), transparent 28rem),
    linear-gradient(180deg, #071c35 0%, #0a1835 48%, #071c35 100%) !important;
}

html[data-color-scheme="dark"] body::before {
  opacity: 0.45;
}

html[data-color-scheme="dark"] .site-nav,
html[data-color-scheme="dark"] .topbar {
  border-color: rgba(87, 191, 255, 0.24) !important;
  background: rgba(10, 24, 53, 0.92) !important;
}

html[data-color-scheme="dark"] .nav-links {
  border-color: rgba(87, 191, 255, 0.2);
  background: rgba(87, 191, 255, 0.1);
}

html[data-color-scheme="dark"] .nav-links a:hover,
html[data-color-scheme="dark"] .nav-links a:focus-visible,
html[data-color-scheme="dark"] .nav-links a[aria-current]:not(.nav-cta),
html[data-color-scheme="dark"] .brand[aria-current] {
  background: #334155;
  color: var(--ink);
}

html[data-color-scheme="dark"] :is(.button-primary, .button:not(.button-secondary):not(.button-quiet), .nav-links .nav-cta):is(:hover, :focus-visible, :active) {
  border-color: var(--blue-strong);
  background: #075898;
  color: #ffffff;
}

html[data-color-scheme="dark"] .button-secondary:is(:hover, :focus-visible, :active) {
  border-color: var(--line-strong);
  background: var(--surface-hover);
  color: var(--ink);
}

html[data-color-scheme="dark"] :is(.learning-resource-hero, .course-hero) .button-secondary {
  border-color: var(--line-strong);
  background: var(--paper);
  color: var(--ink);
}

html[data-color-scheme="dark"] :is(
  .nav-toggle,
  .section-eyebrow,
  .content-card a:not(.button),
  .article-card a:not(.button),
  .chip,
  .article-meta,
  .inquiry-status.success,
  .resource-link,
  .priority-status,
  .readiness-grid dd,
  .scenario-link,
  .opportunity-list li::before,
  .direction-grid dt
) {
  color: var(--accent-text);
}

html[data-color-scheme="dark"] .hero {
  background: linear-gradient(180deg, #0a1835 0%, #071c35 100%);
}

html[data-color-scheme="dark"] .section-alt {
  background: rgba(10, 24, 53, 0.72);
}

html[data-color-scheme="dark"] .release-feature {
  background: rgba(10, 24, 53, 0.72);
}

html[data-color-scheme="dark"] :is(
  .brand-panel,
  .memo-panel,
  .form-card,
  .content-card,
  .article-card,
  .founder-perspective-card,
  .info-card,
  .faq-item,
  .disclosure-panel,
  .decision-callout,
  .priority-item,
  .readiness-grid div,
  .scenario-card,
  .direction-grid div,
  .opportunity-list li,
  .tip-card,
  .learning-featured-card,
  .learning-resource-card,
  .learning-commitment,
  .course-option-grid article
) {
  background: var(--paper) !important;
}

html[data-color-scheme="dark"] :is(
  .eyebrow,
  .card-kicker,
  .tip-example,
  .prompt-example,
  .module-score,
  .completion-panel,
  .storage-notice,
  .writing-privacy,
  .fast-track-itinerary,
  .assessment-rationale,
  .course-completion-summary,
  .download-panel,
  .course-callout
) {
  background: var(--bg-soft) !important;
}

html[data-color-scheme="dark"] :is(
  .tip-category-nav a,
  .course-section-controls button
) {
  background: var(--paper);
  color: var(--ink);
}

html[data-color-scheme="dark"] :is(
  .tips-closing,
  .course-tagline,
  .course-disclosure > summary,
  .path-chooser [data-course-path]
) {
  color: var(--ink);
}

html[data-color-scheme="dark"] :is(
  .course-sidebar nav a[aria-current="page"],
  .course-mobile-nav nav a[aria-current="page"]
) {
  background: var(--bg-soft);
  color: var(--ink);
}

html[data-color-scheme="dark"] .course-section-controls button:hover:not(:disabled) {
  border-color: var(--line-strong);
  background: var(--surface-hover);
}

html[data-color-scheme="dark"] .course-section-controls button:active:not(:disabled) {
  background: var(--bg-soft);
}

html[data-color-scheme="dark"] .tip-category-nav a:focus-visible {
  outline: 3px solid var(--sky);
}

html[data-color-scheme="light"] .tip-category-nav a:focus-visible {
  outline: 3px solid var(--sky);
}

html[data-color-scheme="dark"] :is(.memoray-logo-lockup, .inquiry-field input, .inquiry-field select, .inquiry-field textarea) {
  background: var(--paper) !important;
  color: var(--ink);
}

html[data-color-scheme="dark"] .theme-control {
  border-color: var(--line);
  background: var(--paper);
  color: var(--muted);
}

@media (max-width: 980px) {
  .theme-control {
    display: inline-flex;
    width: auto;
    min-height: 2.75rem;
    border-radius: 999px;
  }

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

  html[data-color-scheme="dark"] .js .nav-links,
  html[data-color-scheme="dark"] .nav-links.active {
    background: rgba(10, 24, 53, 0.98) !important;
  }
}

@media (max-width: 640px) {
  .theme-control {
    margin-left: 0;
    padding: 0.35rem;
  }

  .theme-control select {
    width: 5.8rem;
  }
}

@media print {
  .theme-control {
    display: none !important;
  }
}