/* ========================================
   CSS Variables for Light/Dark Mode
   ======================================== */

:root {
  /* Light mode colors */
  --color-bg: #ffffff;
  --color-bg-alt: #faf9ff; /* subtle violet-tinted off-white */
  --color-bg-subtle: #f3f1ff; /* soft surface */

  --color-text: #14121a;
  --color-text-secondary: #3f3a4a;
  --color-text-tertiary: #625b70;

  --color-border: #e4e0f2;
  --color-border-strong: #c9c1e3;

  /* Brand accent (links, focus, highlights) */
  --color-primary: #6d28d9; /* purple */
  --color-primary-hover: #5b21b6;
  --color-primary-bg: #efe7ff;

  --color-secondary: #3f3a4a;
  --color-secondary-hover: #14121a;

  /* Focus */
  --color-focus: #6d28d9;
  --color-focus-outline: rgba(109, 40, 217, 0.45);

  /* Typography */
  --font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial,
    sans-serif;
  --font-family-heading: "Fraunces", ui-serif, Georgia, "Times New Roman", serif;

  --font-size-base: 18px;
  --font-size-small: 15px;
  --font-size-medium: 16px;
  --font-size-large: 20px;
  --font-size-xl: 32px;
  --font-size-xxl: 52px;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-base: 1.75;
  --line-height-relaxed: 1.85;
  --line-height-tight: 1.65;
  --line-height-heading: 1.25;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-xxl: 3rem;
  --space-xxxl: 7rem;

  /* Layout */
  --max-width: 1100px;
  --max-narrow-width: 680px;
  --max-text-width: 70ch;

  /* Border radius */
  --border-radius-small: 6px;
  --border-radius-medium: 10px;
  --border-radius-large: 16px;

  /* Transition */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* CTA palette (orange primary CTA; AAA in light mode with white text) */
  --accent-orange: #9a3412;
  --accent-orange-hover: #7c2d12;
  --accent-orange-soft: #fff1e7;

  /* Button tokens */
  --btn-primary-bg: var(--accent-orange);
  --btn-primary-bg-hover: var(--accent-orange-hover);
  --btn-primary-fg: #ffffff;

  --btn-secondary-bg: transparent;
  --btn-secondary-fg: var(--color-text);
  --btn-secondary-border: var(--color-border-strong);

  --btn-ghost-bg-hover: rgba(0, 0, 0, 0.06);

  /* Focus ring (purple feels more “intentional” than orange) */
  --btn-focus-ring: rgba(109, 40, 217, 0.45);
}

/* Dark mode - AAA contrast optimized */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0b0b12; /* cool slate (not pure black) */
    --color-bg-alt: #121226;
    --color-bg-subtle: #191934;

    --color-text: #f3f2ff;
    --color-text-secondary: #c9c6e4;
    --color-text-tertiary: #a7a2c8;

    --color-border: #2a2950;
    --color-border-strong: #3a3870;

    /* Brand accent (purple) */
    --color-primary: #a78bfa;
    --color-primary-hover: #c4b5fd;
    --color-primary-bg: #1a1530;

    --color-secondary: #c9c6e4;
    --color-secondary-hover: #f3f2ff;

    --color-focus: #a78bfa;
    --color-focus-outline: rgba(167, 139, 250, 0.45);

    /* CTA button: keep AAA in dark mode by using dark text on bright orange */
    --btn-primary-bg: #fb923c;
    --btn-primary-bg-hover: #fdba74; /* still AAA with dark text */
    --btn-primary-fg: #0b0b12;

    --btn-secondary-fg: var(--color-text);
    --btn-secondary-border: var(--color-border-strong);

    --btn-ghost-bg-hover: rgba(255, 255, 255, 0.08);
    --btn-focus-ring: rgba(167, 139, 250, 0.45);
  }
}

/* ========================================
   Base Styles
   ======================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .btn:hover {
    transform: none;
  }

  .logo-item img:hover,
  .logo-item img:focus {
    transform: none;
  }
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ========================================
   Skip Link (Accessibility)
   ======================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  border: 0;
  padding: 0;
  white-space: nowrap;
  clip-path: inset(100%);
  clip: rect(0 0 0 0);
  overflow: hidden;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  padding: var(--space-sm) var(--space-lg);
  background-color: var(--color-primary);
  color: white;
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  z-index: 9999;
  border-radius: 0 0 var(--border-radius-large) 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  border-bottom: none;
}

.skip-link:focus {
  top: 0;
  outline: 4px solid white;
  outline-offset: 3px;
  box-shadow: 0 0 0 8px rgba(255, 255, 255, 0.3);
}

.skip-link:focus-visible {
  top: 0;
  outline: 4px solid white;
  outline-offset: 3px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ========================================
   Focus Styles (Strong, Accessible)
   ======================================== */

/* Strong focus indicators for keyboard navigation (WCAG 2.2 AAA) */
:focus {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  transition: outline-offset var(--transition-fast);
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 4px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: 3px;
  box-shadow: 0 0 0 8px var(--color-focus-outline);
}

/* Ensure focus is always visible, never removed */
*:focus-visible {
  outline-style: solid !important;
}

/* Focus for images in logo strip */
img:focus-visible {
  outline: 4px solid var(--color-focus);
  outline-offset: 4px;
}

/* ========================================
   Typography
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-lg) 0;
  line-height: var(--line-height-heading);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-xxl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.03em;
}

h2 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.02em;
}

/* Heading font (keeps layout intact; just typography) */
h1,
h2,
h3,
h4,
h5,
h6,
.logo,
.headline,
.section-title {
  font-family: var(--font-family-heading);
}

p {
  margin: 0 0 var(--space-md) 0;
  max-width: var(--max-text-width);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  text-decoration-skip-ink: auto;
  transition: color var(--transition-fast);
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--color-primary-hover);
  border-bottom-color: currentColor;
}

a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-bottom-color: transparent;
}

/* ========================================
   Layout Containers
   ======================================== */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section {
  padding: var(--space-xxxl) 0;
  border-bottom: 1px solid var(--color-border);
}

.section:last-child {
  border-bottom: none;
}

.section:nth-child(even) {
  background-color: var(--color-bg-alt);
}

/* ========================================
   Nav Section
   ======================================== */

.nav {
  background-color: var(--color-bg);
  padding: var(--space-md) 0;
  position: sticky;
  text-align: center;
  top: 0;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.6);
  z-index: 100;
}

.nav .container,
.nav .nav-menu {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  justify-content: space-between;
  align-items: center;
}

.mobile-nav-header {
  display: none;
  justify-content: space-between;
  align-items: center;
}

/* Logo recolored to text color via mask (works for <img> SVG in light/dark mode) */
.nav-header-logo {
  display: inline-block;
  max-width: 250px;
  background-color: var(--color-text);
  -webkit-mask: url("/assets/wordmark.svg") center / contain no-repeat;
  mask: url("/assets/wordmark.svg") center / contain no-repeat;
  padding-left: var(--space-md);
}

.nav-header-logo img {
  display: block;
  max-width: 100%;
  width: 100%;
  height: auto;
  opacity: 0;
  pointer-events: none;
}

/* Hamburger toggle: mobile only, animates to X when open */
.nav-toggle-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: flex-end;
  flex: 0 0 auto;
  padding: var(--space-sm) var(--space-md);
  width: calc(24px + var(--space-md) + var(--space-md));
  height: calc(31px + var(--space-sm) + var(--space-sm));
  cursor: pointer;
  color: var(--color-text);
  background: transparent;
  border: none;
  border-radius: var(--space-xs);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-toggle:hover {
  color: var(--color-primary);
}

.nav-toggle:focus-visible {
  outline: 4px solid var(--color-focus);
  outline-offset: 4px;
}

.nav-toggle-inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 24px;
  height: 18px;
}

.nav-toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: currentColor;
  border-radius: 1px;
  transform-origin: center;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

/* Hamburger → X when checked */
.nav-toggle-input:checked
  ~ .mobile-nav-header
  .nav-toggle
  .nav-toggle-line:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.nav-toggle-input:checked
  ~ .mobile-nav-header
  .nav-toggle
  .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle-input:checked
  ~ .mobile-nav-header
  .nav-toggle
  .nav-toggle-line:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile: show toggle, collapse menu until opened; menu overlays content via anchor */
@media (max-width: 768px) {
  .nav {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .nav-toggle {
    display: flex;
  }

  .mobile-nav-header {
    display: flex;
    anchor-name: --mobile-nav-header;
  }

  .nav-header-logo.desktop {
    display: none;
  }

  .nav .nav-menu {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-top: none;
    transition: max-height 0.3s ease, opacity 0.25s ease, padding 0.25s ease;
  }

  .nav-toggle-input:checked ~ .nav-menu {
    max-height: 80vh;
    opacity: 1;
    padding-top: var(--space-md);
    padding-bottom: var(--space-md);
    border-top: 1px solid var(--color-border);
  }

  /* Overlay: position menu below header so it flows over content (no layout shift) */
  @supports (top: anchor(bottom)) {
    .nav .nav-menu {
      position: fixed;
      position-anchor: --mobile-nav-header;
      top: anchor(--mobile-nav-header bottom);
      left: anchor(--mobile-nav-header left);
      right: anchor(--mobile-nav-header right);
      margin: 0;
      overflow-y: auto;
      background-color: var(--color-bg);
      border-bottom: 1px solid var(--color-border);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      z-index: 99;
    }
  }

  .nav-menu .nav-list {
    flex-direction: column;
    gap: 0;
  }

  .nav-menu .nav-item {
    margin: 0;
    text-align: center;
  }

  .nav-menu .nav-item a,
  .nav-menu .nav-back-to-top a {
    display: block;
    padding: var(--space-md);
  }

  .nav-menu .nav-item a:hover {
    border-bottom-color: transparent;
  }

  .nav-list,
  .nav-item {
    width: 100%;
  }

  @media (prefers-reduced-motion: reduce) {
    .nav-toggle-line {
      transition-duration: 0.01ms;
    }

    .nav-menu {
      transition-duration: 0.01ms;
    }
  }
}

.nav-list {
  display: flex;
  justify-content: center;
  align-items: center;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-item {
  margin: 0 var(--space-md);
}

/* Back to top + mobile nav logo: hidden until page is scrolled (CSS scroll-driven animation) */
.nav-back-to-top,
.nav-header-logo {
  /* Fallback when scroll-driven animations aren’t supported: always visible */
  opacity: 1;
  visibility: visible;
}

@supports (animation-timeline: scroll()) {
  .nav-back-to-top,
  .nav-header-logo {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    animation: nav-reveal-on-scroll linear;
    animation-timeline: scroll(root block);
    animation-range: 300px 400px;
    animation-fill-mode: both;
  }

  @keyframes nav-reveal-on-scroll {
    from {
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
    }
    to {
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    .nav-back-to-top,
    .nav-header-logo {
      animation: none;
      opacity: 1;
      visibility: visible;
      pointer-events: auto;
    }
  }
}

/* ========================================
   Header / Hero Section
   ======================================== */

.hero {
  padding: var(--space-xxxl) 0 var(--space-xxl) 0;
  text-align: center;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.logo {
  color: var(--color-text);
  margin: 0 auto;
  max-width: 350px;
  width: 100%;
}

.headline {
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.subhead {
  max-width: var(--max-narrow-width);
  margin: 0 auto var(--space-xl) auto;
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  min-height: 48px;
  min-width: 120px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-decoration: none;
  border-radius: var(--border-radius-large);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn:active {
  transform: translateY(0);
}

/* PRIMARY CTA
   Use the CTA/button tokens (defined in BOTH modes) to guarantee contrast.
   This fixes the dark-mode purple/white contrast violation without changing your purple brand accents. */
.btn-primary {
  background-color: var(--btn-primary-bg);
  color: var(--btn-primary-fg);
  border-color: var(--btn-primary-bg);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.btn-primary:hover {
  background-color: var(--btn-primary-bg-hover);
  border-color: var(--btn-primary-bg-hover);
  color: var(--btn-primary-fg);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.18);
}

.btn-primary:focus-visible {
  outline: 4px solid var(--color-focus);
  outline-offset: 4px;
  box-shadow: 0 0 0 8px var(--color-focus-outline),
    0 2px 8px rgba(0, 0, 0, 0.12);
}

/* SECONDARY CTA
   Keep it outlined and “lighter touch” (more professional than flipping to a heavy block).
   Uses existing tokens only; works in both modes. */
.btn-secondary {
  background-color: var(--btn-secondary-bg);
  color: var(--btn-secondary-fg);
  border-color: var(--btn-secondary-border);
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.05);
}

.btn-secondary:hover {
  background-color: var(--accent-orange-soft);
  color: var(--btn-secondary-fg);
  border-color: var(--btn-primary-bg);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.btn-secondary:focus-visible {
  outline: 4px solid var(--color-focus);
  outline-offset: 4px;
  box-shadow: 0 0 0 8px var(--color-focus-outline),
    0 1px 4px rgba(0, 0, 0, 0.05);
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  align-items: center;
  margin-top: var(--space-lg);
}

/* ========================================
   Experience Section (Logo Strip)
   ======================================== */

.experience-section {
  text-align: center;
  background-color: var(--color-bg);
}

.logo-strip {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: var(--space-lg) 0;
}

.logo-item {
  position: relative;
  flex: 0 1 auto;
  min-width: 120px;
  max-width: 160px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs);
}

/* Make logo containers keyboard focusable for screen reader users */
.logo-item:focus-within {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--border-radius);
}

.logo-item img {
  width: 100%;
  height: auto;
  max-height: 50px;
  object-fit: contain;
  opacity: 0.75;
  transition: all var(--transition-base);
  filter: grayscale(100%) contrast(1.15);
}

.logo-item img:hover,
.logo-item img:focus,
.logo-item img:focus-visible {
  opacity: 1;
  filter: grayscale(25%) contrast(1.05);
  transform: scale(1.05);
}

.logo-item img:focus-visible {
  outline: 4px solid var(--color-focus);
  outline-offset: 4px;
  border-radius: var(--border-radius);
}

/* Dark mode logo adaptations */
@media (prefers-color-scheme: dark) {
  .logo-item img {
    filter: grayscale(100%) brightness(0) invert(1) contrast(1.25);
    opacity: 0.65;
  }

  .logo-item img:hover,
  .logo-item img:focus,
  .logo-item img:focus-visible {
    filter: grayscale(50%) brightness(1) invert(1) contrast(1.1);
    opacity: 0.9;
  }

  /* Dark-mode secondary hover: keep it subtle (no inversion) */
  .btn-secondary:hover {
    background-color: rgba(251, 146, 60, 0.12);
    border-color: var(--btn-primary-bg);
    color: var(--btn-secondary-fg);
  }
}

/* Fallback text (shown when image fails to load or on very small screens) */
.logo-fallback-text {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Show fallback text when image fails */
.logo-item img[alt]:not([src]),
.logo-item img[alt][src=""],
.logo-item img[alt]:not([src*=".svg"]):not([src*=".png"]):not([src*=".jpg"]) {
  display: none;
}

.logo-item:has(img[alt]:not([src])) .logo-fallback-text,
.logo-item:has(img[alt][src=""]) .logo-fallback-text {
  position: static;
  width: auto;
  height: auto;
  padding: var(--space-sm);
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  background-color: var(--color-bg-alt);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  display: inline-block;
}

/* Text-only list (hidden by default, shown on very small screens) */
.logo-text-list {
  display: none;
  list-style: none;
  padding: 0;
  margin: 0 auto;
  max-width: 400px;
  text-align: left;
}

.logo-text-list li {
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  background-color: var(--color-bg-subtle);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--border-radius);
  line-height: var(--line-height-base);
}

.logo-text-list li:last-child {
  margin-bottom: 0;
}

.footnote {
  margin-top: var(--space-lg);
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-tertiary);
  font-style: italic;
  line-height: var(--line-height-base);
  max-width: 100%;
}

/* Responsive: Show text list on very small screens */
@media (max-width: 480px) {
  .logo-strip {
    display: none;
  }

  .logo-text-list {
    display: block;
  }

  .footnote {
    display: none;
  }
}

/* Responsive: Adjust logo sizes on medium screens */
@media (max-width: 768px) and (min-width: 481px) {
  .logo-strip {
    gap: var(--space-lg);
    padding: var(--space-md) 0;
  }

  .logo-item {
    min-width: 110px;
    max-width: 140px;
  }

  .logo-item img {
    max-height: 45px;
  }
}

/* ========================================
   Section Titles
   ======================================== */

.section-title {
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  letter-spacing: -0.02em;
  line-height: var(--line-height-heading);
  text-align: center;
}

/* ========================================
   Content Lists
   ======================================== */

.content-list {
  max-width: var(--max-text-width);
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.content-list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text);
}

.content-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
  font-size: 1.2em;
  line-height: 1;
  top: 0.1em;
}

/* ========================================
   Engagements List
   ======================================== */

.engagements-list {
  max-width: var(--max-text-width);
  margin: 0 auto;
}

.engagement {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  padding-left: var(--space-md);
  border-left: 3px solid var(--color-border);
  transition: border-color var(--transition-base);
}

.engagement:hover,
.engagement:focus-within {
  border-left-color: var(--color-primary);
}

.engagement:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

.engagement dt {
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  line-height: var(--line-height-tight);
}

.engagement dd {
  margin: 0;
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

/* ========================================
   Schedule Section
   ======================================== */

.schedule-section {
  text-align: center;
  background-color: var(--color-bg-subtle);
}

.schedule-text {
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-large);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 100%;
}

/* ========================================
   Nav Items / Footer
   ======================================== */

.footer {
  padding: var(--space-xxl) 0 var(--space-xl) 0;
  text-align: center;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.copyright {
  margin-bottom: var(--space-md);
  font-size: var(--font-size-medium);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-tertiary);
  max-width: 100%;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  align-items: center;
}

.nav-item a,
.footer-links a {
  font-size: var(--font-size-medium);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  border-bottom: 1px solid transparent;
  padding: var(--space-xs) var(--space-sm);
  margin: calc(-1 * var(--space-xs)) calc(-1 * var(--space-sm));
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-item a:hover,
.footer-links a:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.nav-item a:focus-visible,
.footer-links a:focus-visible {
  outline: 4px solid var(--color-focus);
  outline-offset: 4px;
  border-bottom-color: transparent;
  box-shadow: 0 0 0 8px var(--color-focus-outline);
  border-radius: 3px;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
  :root {
    --font-size-base: 17px;
    --font-size-small: 14px;
    --font-size-medium: 15px;
    --font-size-large: 19px;
    --font-size-xl: 28px;
    --font-size-xxl: 40px;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-xxl: 4.5rem;
    --space-xxxl: 6rem;
  }

  .section {
    padding: var(--space-xxl) 0;
  }

  .hero {
    padding: var(--space-xxl) 0 var(--space-xl) 0;
  }

  .cta-group {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    max-width: 400px;
    text-align: center;
    min-height: 48px;
  }

  .logo-strip {
    gap: var(--space-md);
  }

  .logo-item {
    max-width: 120px;
  }

  .engagement {
    padding-left: var(--space-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-base: 16px;
    --font-size-small: 13px;
    --font-size-medium: 14px;
    --font-size-large: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 34px;
    --space-xl: 2.5rem;
    --space-xxl: 3.5rem;
    --space-xxxl: 5rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-xl) 0;
  }

  .hero {
    padding: var(--space-xl) 0 var(--space-lg) 0;
  }

  .logo-item {
    max-width: 100px;
  }

  .btn {
    padding: 0.875rem 1.5rem;
    min-height: 48px;
  }

  .footer-links {
    gap: var(--space-md);
  }
}

/* ========================================
   High Contrast Mode Support
   ======================================== */

@media (prefers-contrast: high) {
  :root {
    --color-primary: #0047b3;
    --color-border: #000000;
    --color-text: #000000;
    --color-text-secondary: #1a1a1a;

    /* Maintain button contrast in high contrast mode (same tokens, same names) */
    --btn-primary-bg: #000000;
    --btn-primary-bg-hover: #000000;
    --btn-primary-fg: #ffffff;

    --btn-secondary-border: #000000;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --color-primary: #66b3ff;
      --color-border: #ffffff;
      --color-text: #ffffff;
      --color-text-secondary: #e0e0e0;

      --btn-primary-bg: #ffffff;
      --btn-primary-bg-hover: #ffffff;
      --btn-primary-fg: #000000;

      --btn-secondary-border: #ffffff;
    }
  }

  .btn {
    border-width: 3px;
  }

  .btn:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  }

  :focus,
  :focus-visible {
    outline-width: 4px;
    outline-offset: 4px;
  }

  /* Enhanced logo visibility in high contrast mode */
  .logo-item img {
    opacity: 1;
    filter: contrast(1.6);
  }

  @media (prefers-color-scheme: dark) {
    .logo-item img {
      filter: brightness(0) invert(1) contrast(1.9);
      opacity: 1;
    }
  }

  .logo-text-list li {
    border-left-width: 4px;
  }

  .engagement {
    border-left-width: 4px;
  }

  a {
    border-bottom-width: 2px;
    text-decoration: underline;
  }
}

/* ========================================
   Print Styles (Accessibility)
   ======================================== */

@media print {
  /* Show all content clearly for printing */
  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
    background: #fff;
  }

  .skip-link {
    display: none;
  }

  /* Expand all sections */
  .section {
    page-break-inside: avoid;
    padding: 1rem 0;
    border-bottom: 1pt solid #ccc;
  }

  /* Show URLs for external links */
  a[href^="http"]:after {
    content: " (" attr(href) ")";
    font-size: 10pt;
    color: #666;
  }

  /* Hide interactive elements that don't make sense in print */
  .btn,
  .cta-group {
    display: none;
  }

  /* Ensure logos print well */
  .logo-item img {
    opacity: 1;
    filter: none;
    max-height: 40px;
  }

  /* Show text version on print */
  .logo-text-list {
    display: block !important;
  }

  .logo-strip {
    display: none;
  }

  /* Clean up footer */
  .footer-links a:after {
    content: none;
  }

  /* Ensure good contrast */
  * {
    color: #000 !important;
    background: #fff !important;
  }

  h1,
  h2,
  h3,
  dt {
    color: #000 !important;
    font-weight: bold;
  }
}