/* ============================================
   THE NACD APPROACH — DESIGN TOKENS
   ============================================

   Per NACD Brand Guide v1.4. All colors, fonts,
   spacing reflect the locked brand system.

   ============================================ */

:root {
  /* COLORS — locked from NACD Brand Guide v1.4 */
  --color-teal: #0C807D;            /* Main Teal: wordmark, primary buttons, eyebrows */
  --color-teal-bright: #13919B;     /* Brighter Teal: hover, alt section bg, gradient */
  --color-ink: #0F2A43;             /* Site Text: type on light */
  --color-bg-light: #F5F7FA;        /* Lighter Background: cards, tables, alt rows */
  --color-bg-canvas: #E0FCFF;       /* Site Background: pale cyan page canvas */
  --color-footer-dark: #343C43;     /* Footer background, dark UI surfaces */
  --color-accent-yellow: #FFF9B7;   /* Soft callouts */
  --color-orange: #F16521;          /* Links, emphasis CTAs, newsletter buttons */
  --color-purple: #6353A3;          /* Alt accent: sparingly */

  /* Body type colors derived from Site Text */
  --color-body: rgba(15, 42, 67, 0.82);
  --color-muted: rgba(15, 42, 67, 0.6);
  --color-subtle: rgba(15, 42, 67, 0.45);
  --color-line: rgba(15, 42, 67, 0.08);
  --color-line-strong: rgba(15, 42, 67, 0.15);

  /* Surfaces */
  --color-white: #ffffff;

  /* TYPOGRAPHY
     Real Avenir, self-hosted from shared/fonts (brand-supplied files).
     Local Avenir / Avenir Next as fast-path fallback on Apple devices. */
  --font-display: 'Avenir Web', 'Avenir', 'Avenir Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Avenir Web', 'Avenir', 'Avenir Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* SCALE */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;

  /* SPACING */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* LAYOUT
     Per brand guide: 920px body column, 680px reading column,
     620–760px hero copy column. */
  --container-narrow: 42.5rem;   /* 680px reading width */
  --container-medium: 57.5rem;   /* 920px body column */
  --container-wide: 72rem;
  --container-full: 84rem;

  /* TYPE TRACKING — per brand guide */
  --tracking-body: 0.025em;
  --tracking-tight: 0.005em;
  --tracking-h2: 0.012em;
  --tracking-button: 0.018em;
  --tracking-eyebrow: 0.18em;

  /* MOTION */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;

  /* RADIUS — per brand guide */
  --radius-sm: 4px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

/* ============================================
   FONT LOADING — self-hosted Avenir (brand-supplied)
   ============================================ */

@font-face {
  font-family: 'Avenir Web';
  src: url('../fonts/Avenir-Light.otf') format('opentype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Avenir Web';
  src: url('../fonts/Avenir-Book.otf') format('opentype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Avenir Web';
  src: url('../fonts/Avenir-Medium.otf') format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Avenir Web';
  src: url('../fonts/Avenir-Heavy.otf') format('opentype');
  font-weight: 700 800;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Avenir Web';
  src: url('../fonts/Avenir-Black.otf') format('opentype');
  font-weight: 900;
  font-style: normal;
  font-display: swap;
}

/* ============================================
   RESET + BASE
   ============================================ */

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: var(--tracking-body);
  color: var(--color-body);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

a {
  color: var(--color-orange);
  text-decoration: none;
  transition: color var(--transition-fast);
  font-weight: 500;
}

a:hover {
  color: var(--color-teal);
}

/* ============================================
   TYPOGRAPHY UTILITIES — per brand guide
   ============================================ */

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
  color: var(--color-teal);
}

.eyebrow--orange { color: var(--color-orange); }
.eyebrow--white { color: var(--color-white); }

/* ============================================
   LAYOUT
   ============================================ */

.container {
  width: 100%;
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow { max-width: var(--container-narrow); }
.container--medium { max-width: var(--container-medium); }
.container--wide { max-width: var(--container-wide); }
.container--full { max-width: var(--container-full); }

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-8);
  }
}

.section {
  padding-block: var(--space-12);
}

.section--tight { padding-block: var(--space-10); }
.section--loose { padding-block: var(--space-20); }

@media (min-width: 768px) {
  .section { padding-block: var(--space-20); }
  .section--tight { padding-block: var(--space-12); }
  .section--loose { padding-block: var(--space-24); }
}

/* ============================================
   BUTTONS — per brand guide
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 14px 24px;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: var(--tracking-button);
  border-radius: var(--radius-base);
  transition: all var(--transition-base);
  cursor: pointer;
  text-align: center;
  border: 1px solid transparent;
  line-height: 1.2;
}

.btn--primary {
  background: var(--color-teal);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-teal-bright);
  color: var(--color-white);
}

.btn--emphasis {
  background: var(--color-orange);
  color: var(--color-white);
}

.btn--emphasis:hover {
  background: #d54f10;
  color: var(--color-white);
}

.btn--secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}

.btn--secondary:hover {
  background: var(--color-ink);
  color: var(--color-white);
}

.btn--secondary-light {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn--secondary-light:hover {
  background: var(--color-white);
  color: var(--color-ink);
  border-color: var(--color-white);
}

.btn--large {
  padding: 18px 32px;
  font-size: var(--text-lg);
}

.btn .arrow {
  transition: transform var(--transition-base);
}

.btn:hover .arrow {
  transform: translateX(4px);
}

/* ============================================
   FOCUS STATES
   ============================================ */

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: 3px;
}

/* ============================================
   REDUCED MOTION
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================
   LANGUAGE SWITCHER — sidebar, landing hero,
   knowledge check + completion headers
   ============================================ */

.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-eyebrow);
  text-transform: uppercase;
}

.lang-switch__item {
  color: var(--color-muted);
  text-decoration: none;
  font-weight: 500;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

a.lang-switch__item:hover { color: var(--color-teal); }

.lang-switch__item.active {
  color: var(--color-teal);
  border-bottom: 2px solid var(--color-teal);
}

.lang-switch__dot { color: var(--color-subtle); }