:root {
  --color-paper:      oklch(98% 0.006 85);
  --color-paper-2:    oklch(95.5% 0.010 85);
  --color-paper-3:    oklch(93% 0.012 85);
  --color-card:       oklch(99.3% 0.004 85);
  --color-rule:       oklch(88% 0.012 85);
  --color-rule-2:     oklch(92% 0.010 85);
  --color-ink:        oklch(31% 0.055 250);
  --color-ink-2:      oklch(40% 0.045 250);
  --color-muted:      oklch(50% 0.028 250);
  --color-navy:       oklch(31% 0.055 250);
  --color-navy-deep:  oklch(25% 0.05 250);
  --color-on-navy:    oklch(97% 0.008 85);
  --color-on-navy-2:  oklch(82% 0.015 250);
  --color-accent:     oklch(56% 0.115 60);
  --color-accent-deep:oklch(47% 0.10 60);
  --color-accent-deeper: oklch(40% 0.09 60);
  --color-nav-veil:   oklch(98% 0.006 85 / 0.82);
  --color-accent-hl:  oklch(50% 0.13 45);
  --color-on-accent:  oklch(98% 0.008 85);
  --color-focus:      oklch(52% 0.15 60);
  --color-shadow:     oklch(31% 0.055 250 / 0.14);

  --font-display: 'General Sans', 'Avenir Next', system-ui, sans-serif;
  --font-body:    'Switzer', 'Helvetica Neue', system-ui, sans-serif;

  --text-sm:   0.8125rem;
  --text-base: 1.0625rem;
  --text-md:   1.25rem;
  --text-lg:   1.5rem;
  --text-xl:   1.875rem;
  --text-display:   clamp(2.5rem, 4.2vw + 1rem, 4.375rem);
  --text-display-s: clamp(1.75rem, 2.4vw + 0.75rem, 2.625rem);

  --space-2xs: 0.25rem;
  --space-xs:  0.5rem;
  --space-sm:  0.75rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-micro: 120ms;
  --dur-short: 220ms;
  --dur-long:  420ms;

  --rule-hair: 1px;
  --radius: 10px;
  --radius-sm: 7px;
  --z-sticky: 200;
}

html { overflow-x: clip; }

body {
  overflow-x: clip;
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
}

.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-nav-veil);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 0;
  border-bottom: var(--rule-hair) solid var(--color-rule-2);
  box-shadow: none;
  height: 100px;
}

.header > .responsive {
  margin-left: 0;
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
  padding-block: var(--space-sm);
}

.header .header-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
}

.header .header-logo .au-logo {
  display: block;
  width: auto;
  flex: none;
}

.header .header-logo .au-wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  line-height: 1;
}

.au-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.header .au-btn { padding: 0.5rem 0.8125rem; }

@media only screen and (min-width: 30rem) {
  .au-nav__links { gap: var(--space-md); }
  .header .au-btn { padding: 0.5rem 0.9375rem; }
}

@media only screen and (min-width: 40rem) {
  .au-nav__links { gap: var(--space-lg); }
  .header .header-logo { gap: 0.75rem; }
  .header .header-logo .au-logo { height: 34px; }
  .header .header-logo .au-wordmark { font-size: 1.375rem; }
}

.au-nav__link {
  color: var(--color-ink-2);
  text-decoration: none;
  font-size: 0.9375rem;
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out);
}

.au-nav__link:hover { color: var(--color-ink); }

/* ---------- shared ---------- */

.container { max-width: none; }

.au {
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

.au h1, .au h2, .au h3 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
  margin: 0;
}

.au p { margin: 0; }

.au :focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: 3px;
}

.au-btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-on-navy);
  background-color: var(--color-navy);
  border: var(--rule-hair) solid var(--color-navy);
  border-radius: var(--radius-sm);
  padding: 0.625rem 1.125rem;
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-micro) var(--ease-out), transform var(--dur-micro) var(--ease-out);
}

.au a.au-btn { color: var(--color-on-navy); }
.au-btn:hover { background-color: var(--color-navy-deep); border-color: var(--color-navy-deep); }
.au-btn:active { transform: translateY(1px); }

.au-btn--bronze { background-color: var(--color-accent-deep); border-color: var(--color-accent-deep); }
.au a.au-btn--bronze { color: var(--color-on-accent); }
.au-btn--bronze:hover { background-color: var(--color-accent-deeper); border-color: var(--color-accent-deeper); }

.header a.au-btn { color: var(--color-on-navy); text-decoration: none; }

.au-link {
  color: var(--color-ink-2);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 4px;
  white-space: nowrap;
  transition: text-decoration-thickness var(--dur-micro) var(--ease-out), color var(--dur-micro) var(--ease-out);
}

.au-link:hover { color: var(--color-ink); text-decoration-thickness: 2.5px; }

/* ---------- hero ---------- */

.au-hero {
  text-align: center;
  padding-block: var(--space-2xl) 0;
  background: linear-gradient(180deg, var(--color-paper) 0%, var(--color-paper-2) 100%);
  border-bottom: var(--rule-hair) solid var(--color-rule-2);
}

.au-kicker {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-deep);
}

.au-hero h1 {
  font-size: var(--text-display);
  line-height: 1.04;
  max-width: 16ch;
  margin: var(--space-md) auto 0;
}

.au-hl { color: var(--color-accent-hl); }

.au-hero__lede {
  font-size: var(--text-md);
  line-height: 1.55;
  color: var(--color-ink-2);
  max-width: 46ch;
  margin: var(--space-lg) auto 0;
}

.au-hero__ctas {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-top: var(--space-xl);
}

.au-hero__shot {
  margin: var(--space-2xl) auto 0;
  max-width: 58rem;
}

.au-hero__shot img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--rule-hair) solid var(--color-rule);
  border-bottom: 0;
  border-radius: var(--radius) var(--radius) 0 0;
  box-shadow: 0 -18px 48px -20px var(--color-shadow);
}

/* ---------- module tour ---------- */

.au-tour { padding-block: var(--space-3xl) var(--space-2xl); }

.au-tour__head { max-width: 40rem; }

.au-tour__head h2 { font-size: var(--text-display-s); line-height: 1.08; }

.au-tour__head p {
  margin-top: var(--space-sm);
  color: var(--color-ink-2);
  max-width: 52ch;
}

/* forumify tabs component restyle */
.au-tour .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
}

.au-tab {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-ink-2);
  background-color: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule-2);
  border-radius: 999px;
  padding: 0.5rem 1.0625rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--dur-micro) var(--ease-out), color var(--dur-micro) var(--ease-out);
}

.au-tab:hover { background-color: var(--color-paper-3); color: var(--color-ink); }

.au-tab.active {
  background-color: var(--color-navy);
  border-color: var(--color-navy);
  color: var(--color-on-navy);
  font-weight: 600;
}

.au-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  align-items: center;
  margin-top: var(--space-lg);
  background-color: var(--color-card);
  border: var(--rule-hair) solid var(--color-rule-2);
  border-radius: var(--radius);
  padding: clamp(1rem, 3vw, 2rem);
}

/* forumify's Tabs controller hides panels with .d-none; that rule is a single
   class and loads before this file, so it must be re-stated here to win. */
.au-panel.d-none { display: none; }

.au-panel figure { margin: 0; min-width: 0; }

.au-panel figure img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-sm);
}

.au-panel__claim {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.015em;
  line-height: 1.15;
}

.au-panel__body { margin-top: var(--space-sm); color: var(--color-ink-2); }

.au-panel__points {
  list-style: none;
  margin: var(--space-lg) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-xs);
  color: var(--color-ink-2);
  font-size: 0.9375rem;
}

.au-panel__points li {
  padding-inline-start: 1.125rem;
  position: relative;
}

.au-panel__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background-color: var(--color-accent);
}

/* ---------- also on the desk ---------- */

.au-tiles { padding-block: var(--space-xl) var(--space-3xl); }

.au-tiles h2 { font-size: var(--text-xl); letter-spacing: -0.015em; }

.au-tiles__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(11rem, 100%), 1fr));
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.au-tile {
  background-color: var(--color-card);
  border: var(--rule-hair) solid var(--color-rule-2);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
}

.au-tile b {
  font-family: var(--font-display);
  font-weight: 600;
  display: block;
  color: var(--color-ink);
}

.au-tile p {
  margin-top: var(--space-2xs);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-muted);
}

/* ---------- why aureum ---------- */

.au-why {
  background-color: var(--color-paper-2);
  border-block: var(--rule-hair) solid var(--color-rule-2);
  padding-block: var(--space-2xl);
}

.au-why h2 { font-size: var(--text-display-s); line-height: 1.08; max-width: 26ch; }

.au-why__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.au-why__item b {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-md);
  color: var(--color-ink);
}

.au-why__item p { margin-top: var(--space-xs); color: var(--color-ink-2); max-width: 44ch; }

/* ---------- closing CTA ---------- */

.au-close {
  background-color: var(--color-navy);
  color: var(--color-on-navy);
  text-align: center;
  padding-block: var(--space-2xl);
}

.au-close h2 { color: var(--color-on-navy); font-size: var(--text-display-s); line-height: 1.08; }

.au-close p {
  color: var(--color-on-navy-2);
  max-width: 44ch;
  margin: var(--space-sm) auto 0;
}

.au-close .au-btn--bronze { margin-top: var(--space-xl); }

/* ---------- footer ---------- */

.au-foot {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
  flex-wrap: wrap;
  padding-block: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

/* ---------- motion ---------- */

.au-reveal {
  opacity: 0;
  transform: translateY(10px);
  animation: au-reveal var(--dur-long) var(--ease-out) forwards;
  animation-delay: calc(var(--i, 0) * 90ms);
}

@keyframes au-reveal { to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .au-reveal { animation: au-reveal-reduced 150ms linear forwards; }
  @keyframes au-reveal-reduced { to { opacity: 1; transform: none; } }
  .au *, .au *::before, .au *::after { transition-duration: 150ms !important; }
}

/* ---------- ≥ 60rem ---------- */

@media only screen and (min-width: 60rem) {
  .au-panel { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); }

  .au-why__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-xl); }
}