/* ============================================================
   72 by 2 — style.css
   Component & layout styles. Mobile-first.
   ============================================================ */

/* ---------- Layout shell ---------- */
.shell {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-16));
}

.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}

.section--muted {
  background: var(--color-surface);
  border-block: 1px solid var(--hairline);
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -120%;
  z-index: 200;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}
.skip-link:focus {
  top: var(--space-3);
}

/* ---------- Type helpers ---------- */
.eyebrow,
.section__kicker {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section__kicker--invert {
  color: var(--color-accent-active);
}
[data-theme='dark'] .section__kicker--invert {
  color: var(--color-accent);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text-muted);
}
.eyebrow__dot {
  width: 7px;
  height: 7px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
}

.section__head {
  max-width: 60ch;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}
.section__head--narrow {
  max-width: 46ch;
}
.section__title {
  font-size: var(--text-xl);
  margin-block: var(--space-3) var(--space-4);
  letter-spacing: -0.01em;
}
.section__intro {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  text-decoration: none;
  border: 1.5px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn--primary:active {
  background: var(--color-primary-active);
  transform: translateY(0);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--hairline);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding-block: var(--space-4);
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  flex: 0 0 auto;
  white-space: nowrap;
}
.brand__mark {
  color: var(--color-primary);
  flex: none;
}
.brand__name {
  font-family: var(--font-display);
  font-size: clamp(1rem, 0.7rem + 0.75vw, 1.25rem);
  letter-spacing: 0.01em;
  color: var(--color-text);
  white-space: nowrap;
}
.brand__name strong {
  color: inherit;
  font-weight: 500;
}

/* Nav */
.nav {
  margin-left: auto;
  min-width: 0;
}
.nav__menu {
  display: flex;
  align-items: center;
  gap: clamp(var(--space-3), 1.25vw, var(--space-5));
  font-family: var(--font-ui);
  font-size: clamp(0.78rem, 0.72rem + 0.18vw, 0.94rem);
}
.nav__menu a {
  white-space: nowrap;
}
.nav__menu a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 500;
}
.nav__menu a:hover {
  color: var(--color-text);
}
.nav__cta {
  color: var(--color-primary) !important;
  font-weight: 600 !important;
}
.nav__cta:hover {
  color: var(--color-primary-hover) !important;
}
.nav__toggle {
  display: none;
}

.theme-toggle {
  flex: none;
  margin-left: var(--space-2);
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: var(--color-surface-2);
}
.theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  padding-top: clamp(var(--space-16), 9vw, var(--space-32));
  padding-bottom: clamp(var(--space-12), 7vw, var(--space-24));
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 50% at 18% 0%, color-mix(in oklab, var(--color-accent-highlight) 60%, transparent), transparent 70%),
    radial-gradient(50% 45% at 92% 8%, color-mix(in oklab, var(--color-primary-highlight) 55%, transparent), transparent 72%);
  opacity: 0.7;
  pointer-events: none;
}
.hero__inner {
  position: relative;
  max-width: 56rem;
}
.hero__title {
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-block: var(--space-5) var(--space-6);
}
.hero__lede {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--color-text-muted);
  max-width: 60ch;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-block: var(--space-8) var(--space-5);
}
.hero__note {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.03em;
}

.hero__verse {
  position: relative;
  max-width: var(--content-wide);
  margin: clamp(var(--space-10), 6vw, var(--space-16)) auto 0;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-16));
}
.hero__verse blockquote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  line-height: 1.45;
  color: var(--color-text);
  max-width: 50ch;
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-5);
}
.hero__verse figcaption {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  padding-left: var(--space-5);
}

/* ============================================================
   Steps (how it works)
   ============================================================ */
.steps {
  display: grid;
  gap: var(--space-8);
  counter-reset: step;
}
.step {
  position: relative;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
}
.step__num {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.08em;
}
.step__title {
  font-size: var(--text-lg);
  margin-block: var(--space-2) var(--space-3);
}
.step p {
  color: var(--color-text-muted);
}

/* ============================================================
   Luke 10 feature
   ============================================================ */
.section--feature {
  background: var(--color-surface);
  border-block: 1px solid var(--hairline);
}
.luke {
  display: grid;
  gap: clamp(var(--space-10), 5vw, var(--space-20));
}
.luke__text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.luke__text em {
  color: var(--color-text);
  font-style: italic;
}
.pullquote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: italic;
  line-height: 1.45;
  color: var(--color-text);
  margin-block: var(--space-8);
  padding: var(--space-6) var(--space-6);
  background: var(--color-surface-2);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
}
.pullquote cite {
  display: block;
  margin-top: var(--space-3);
  font-family: var(--font-ui);
  font-style: normal;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.luke__aside {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 3vw, var(--space-8));
  box-shadow: var(--shadow-sm);
  align-self: start;
}

/* ============================================================
   Connected-count identity section
   ============================================================ */
.identity {
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--color-surface) 86%, transparent), transparent 62%),
    var(--color-bg);
}
.identity__inner {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}
.count-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-8), 5vw, var(--space-12));
  box-shadow: var(--shadow-md);
}
.count-card__number {
  font-family: var(--font-display);
  font-size: clamp(4rem, 18vw, 9rem);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--color-primary);
  max-width: none;
}
.count-card__label {
  margin-top: var(--space-4);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  max-width: 28ch;
}
.count-card__note {
  margin-top: var(--space-3);
  color: var(--color-text-faint);
  font-size: var(--text-sm);
}
.luke__aside-title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-5);
}
.marklist {
  display: grid;
  gap: var(--space-4);
  font-size: var(--text-base);
}
.marklist li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  color: var(--color-text-muted);
}
.marklist__icon {
  color: var(--color-accent);
  font-size: var(--text-sm);
  line-height: 1.6;
}

/* ============================================================
   Cards (classroom witness)
   ============================================================ */
.cards {
  display: grid;
  gap: var(--space-5);
}
.card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 3vw, var(--space-8));
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-interactive),
    box-shadow var(--transition-interactive),
    border-color var(--transition-interactive);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}
.card__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
}
.card p {
  color: var(--color-text-muted);
}

/* ============================================================
   Equipping section
   ============================================================ */
.equipping {
  display: grid;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
}
.equipping__content p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}
.equipping__panel {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
  box-shadow: var(--shadow-sm);
}
.equipping__panel h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-5);
}

/* ============================================================
   About page
   ============================================================ */
.page-hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32)) clamp(var(--space-10), 6vw, var(--space-16));
}
.page-hero__inner {
  max-width: 58rem;
}
.page-hero__title {
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-block: var(--space-4) var(--space-5);
}
.page-hero__lede {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--color-text-muted);
}
.about-article {
  display: grid;
  gap: var(--space-8);
  max-width: 52rem;
}
.about-block {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 4vw, var(--space-10));
}
.about-block h2 {
  font-size: var(--text-xl);
  margin-bottom: var(--space-4);
}
.about-block p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.about-block p:last-child {
  margin-bottom: 0;
}

/* ============================================================
   Timeline (semester rhythm)
   ============================================================ */
.timeline {
  display: grid;
  gap: var(--space-8);
}
.timeline__item {
  position: relative;
  padding-left: var(--space-8);
  border-left: 2px solid var(--color-border);
}
.timeline__item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
}
.timeline__when {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.timeline__title {
  font-size: var(--text-lg);
  margin-block: var(--space-1) var(--space-2);
}
.timeline__item p:last-child {
  color: var(--color-text-muted);
}

/* ============================================================
   FAQ accordion
   ============================================================ */
.faq {
  display: grid;
  gap: var(--space-10);
}
.accordion {
  display: grid;
  gap: var(--space-3);
  max-width: var(--content-default);
}
.qa {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  overflow: hidden;
}
.qa summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
}
.qa summary::-webkit-details-marker {
  display: none;
}
.qa summary:hover {
  color: var(--color-primary);
}
.qa__icon {
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
}
.qa__icon::before,
.qa__icon::after {
  content: '';
  position: absolute;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: transform var(--transition-interactive), opacity var(--transition-interactive);
}
.qa__icon::before {
  inset: 8px 0;
  height: 2px;
}
.qa__icon::after {
  inset: 0 8px;
  width: 2px;
}
.qa[open] .qa__icon::after {
  transform: scaleY(0);
  opacity: 0;
}
.qa__body {
  padding: 0 var(--space-6) var(--space-5);
}
.qa__body p {
  color: var(--color-text-muted);
}

/* ============================================================
   Final CTA / waitlist
   ============================================================ */
.cta {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}
[data-theme='dark'] .cta {
  background: var(--color-surface-2);
  border-block: 1px solid var(--color-border);
}
.cta__inner {
  max-width: 48rem;
  text-align: center;
  margin-inline: auto;
}
.cta__title {
  font-size: var(--text-2xl);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-block: var(--space-3) var(--space-5);
  color: var(--color-text-inverse);
}
[data-theme='dark'] .cta__title {
  color: var(--color-text);
}
.cta__lede {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: color-mix(in oklab, var(--color-text-inverse) 82%, transparent);
  margin-inline: auto;
}
[data-theme='dark'] .cta__lede {
  color: var(--color-text-muted);
}

.waitlist {
  margin-top: var(--space-10);
}
.waitlist__row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  max-width: 34rem;
  margin-inline: auto;
}
.waitlist__input {
  flex: 1 1 16rem;
  min-width: 0;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: 1.5px solid color-mix(in oklab, var(--color-text-inverse) 35%, transparent);
  background: color-mix(in oklab, var(--color-text-inverse) 12%, transparent);
  color: var(--color-text-inverse);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}
.waitlist__input::placeholder {
  color: color-mix(in oklab, var(--color-text-inverse) 60%, transparent);
}
[data-theme='dark'] .waitlist__input {
  background: var(--color-bg);
  border-color: var(--color-border);
  color: var(--color-text);
}
[data-theme='dark'] .waitlist__input::placeholder {
  color: var(--color-text-faint);
}
.cta .btn--primary {
  background: var(--color-accent);
  color: #2a2419;
}
.cta .btn--primary:hover {
  background: var(--color-accent-hover);
}
.waitlist__hint {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  margin-top: var(--space-4);
  color: color-mix(in oklab, var(--color-text-inverse) 70%, transparent);
  letter-spacing: 0.02em;
}
[data-theme='dark'] .waitlist__hint {
  color: var(--color-text-faint);
}
.waitlist__hint--ok {
  color: var(--color-text-inverse) !important;
  font-weight: 600;
}
[data-theme='dark'] .waitlist__hint--ok {
  color: var(--color-primary) !important;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--hairline);
  padding-top: clamp(var(--space-16), 7vw, var(--space-24));
}
.site-footer__inner {
  display: grid;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
}
.footer-name {
  font-size: var(--text-xl);
}
.footer-name strong {
  font-weight: 700;
}
.site-footer__tag {
  color: var(--color-text-muted);
  margin-block: var(--space-3) var(--space-6);
  max-width: 44ch;
}
.site-footer__parent {
  width: clamp(180px, 40vw, 240px);
  opacity: 0.85;
}
[data-theme='dark'] .site-footer__parent {
  filter: invert(1) brightness(1.1);
  opacity: 0.8;
}
.site-footer__heading {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.site-footer__nav ul {
  display: grid;
  gap: var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
}
.site-footer__nav a {
  text-decoration: none;
  color: var(--color-text-muted);
}
.site-footer__nav a:hover {
  color: var(--color-primary);
}
.site-footer__base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-6);
  border-top: 1px solid var(--hairline);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.site-footer__verse {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============================================================
   Reveal-on-scroll (progressive enhancement)
   ============================================================ */
/* Only hide when JS has opted in (html.js-reveal). No-JS users see everything. */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms ease, transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}
.js-reveal [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .js-reveal [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
  }
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline {
    grid-template-columns: repeat(2, 1fr);
    column-gap: var(--space-10);
  }
  .site-footer__inner {
    grid-template-columns: 1.6fr 1fr;
  }
}

@media (min-width: 960px) {
  .luke {
    grid-template-columns: 1.5fr 1fr;
    align-items: start;
  }
  .identity__inner,
  .equipping {
    grid-template-columns: minmax(0, 1.15fr) minmax(18rem, 0.85fr);
  }
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- Mobile nav ---------- */
@media (max-width: 1279px) {
  .nav__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    background: var(--color-surface-2);
    position: relative;
  }
  .nav__toggle-bars,
  .nav__toggle-bars::before,
  .nav__toggle-bars::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform var(--transition-interactive), opacity var(--transition-interactive);
  }
  .nav__toggle-bars {
    left: 11px;
  }
  .nav__toggle-bars::before {
    transform: translateY(-6px);
  }
  .nav__toggle-bars::after {
    transform: translateY(6px);
  }
  .nav__toggle[aria-expanded='true'] .nav__toggle-bars {
    background: transparent;
  }
  .nav__toggle[aria-expanded='true'] .nav__toggle-bars::before {
    transform: rotate(45deg);
  }
  .nav__toggle[aria-expanded='true'] .nav__toggle-bars::after {
    transform: rotate(-45deg);
  }

  .nav__menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: var(--space-2) clamp(var(--space-5), 5vw, var(--space-16)) var(--space-5);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    transition: max-height var(--transition-interactive), visibility var(--transition-interactive);
  }
  .nav__menu.is-open {
    max-height: 24rem;
    visibility: visible;
  }
  .nav__menu li {
    border-top: 1px solid var(--hairline);
  }
  .nav__menu a {
    display: block;
    padding-block: var(--space-4);
    font-size: var(--text-base);
  }
}

@media (min-width: 1280px) {
  .nav__menu {
    max-height: none !important;
    visibility: visible !important;
  }
}