/* =========================================================
   COMPONENTS — nav, btn, cards, marquee, accordion, etc.
   ========================================================= */

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  padding-block: 12px;
  background: rgba(246,247,242, 0.78);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out-soft),
              border-color var(--dur-base) var(--ease-out-soft);
}
.nav.is-scrolled {
  background: rgba(246,247,242, 0.94);
  border-bottom-color: var(--rule-soft);
}
.nav__inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-m);
}
.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--fg-display);
}
.nav__brand-mark-img {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: block;
  object-fit: contain;
}
@media (max-width: 720px) { .nav__brand-mark-img { width: 38px; height: 38px; } }
.nav__brand-text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  gap: 4px;
}
.nav__brand-text-name {
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 500;
  letter-spacing: -0.012em;
  color: var(--deep-12);
}
.nav__brand-text-role {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--teal-11);
}
@media (max-width: 720px) {
  .nav__brand-mark { width: 32px; height: 32px; }
  .nav__brand-text-name { font-size: 1.08rem; }
  .nav__brand-text-role { font-size: 0.54rem; letter-spacing: 0.2em; }
}

.nav__menu {
  display: flex;
  gap: var(--space-m);
  align-items: center;
}
.nav__link {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--fg-muted);
  letter-spacing: -0.005em;
  position: relative;
  text-decoration: none;
  padding: 6px 0;
}
.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--dur-base) var(--ease-out-soft);
}
.nav__link:hover { color: var(--accent); }
.nav__link:hover::after { width: 100%; }

.nav__menu-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--fg-display);
  border-radius: var(--r-s);
}

.nav__drawer {
  display: none;
}

@media (max-width: 1023px) {
  .nav__menu { display: none !important; }
  .nav__cta   { display: none !important; }
  .nav__menu-toggle { display: inline-flex; }

  .nav__drawer {
    display: none;
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: var(--cream-50);
    border-bottom: 1px solid var(--rule);
    padding: var(--space-m) var(--gutter) var(--space-l);
    flex-direction: column;
    gap: var(--space-s);
    z-index: var(--z-drawer);
    box-shadow: var(--shadow-l);
  }
  .nav__drawer.is-open { display: flex; }
  .nav__drawer .nav__link {
    font-size: 1.05rem;
    padding: 12px 0;
    border-bottom: 1px solid var(--rule-soft);
  }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  --btn-pad-x: 1.5rem;
  --btn-pad-y: 0.95rem;
  --btn-fs: 0.96rem;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  font-family: var(--font-body);
  font-size: var(--btn-fs);
  font-weight: 600;
  letter-spacing: -0.005em;
  border-radius: var(--r-pill);
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--dur-base) var(--ease-out-soft),
              color var(--dur-base) var(--ease-out-soft),
              transform var(--dur-base) var(--ease-spring),
              box-shadow var(--dur-base) var(--ease-out-soft);
  border: 1px solid transparent;
  min-height: 44px;
}

.btn--primary {
  background: var(--deep-9);
  color: var(--cream-50);
  box-shadow: var(--shadow-s);
}
.btn--primary:hover {
  background: var(--deep-10);
  color: var(--cream-50);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.btn--ghost {
  background: transparent;
  color: var(--fg-display);
  border-color: var(--rule);
}
.btn--ghost:hover {
  background: var(--cream-100);
  border-color: var(--deep-9);
  color: var(--deep-9);
  text-decoration: none;
}

.btn--sm {
  --btn-pad-x: 1.05rem;
  --btn-pad-y: 0.62rem;
  --btn-fs: 0.86rem;
  min-height: 38px;
}

.btn--lg {
  --btn-pad-x: 2.1rem;
  --btn-pad-y: 1.15rem;
  --btn-fs: 1.04rem;
}

.btn i { font-size: 1.1em; line-height: 1; }

/* Sticky CTA mobile — compact pill, brand-aligned */
.sticky-cta {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  z-index: var(--z-sticky);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 12px 22px;
  background: var(--deep-9);
  color: var(--cream-50);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: -0.005em;
  border-radius: var(--r-pill);
  text-decoration: none;
  border: 1px solid rgba(246,247,242,0.10);
  box-shadow: 0 18px 40px -12px rgba(11,14,12,0.40),
              0 4px 14px -4px rgba(11,14,12,0.20);
  transition: transform var(--dur-base) var(--ease-spring),
              opacity var(--dur-base) var(--ease-out-soft),
              background var(--dur-base) var(--ease-out-soft);
  opacity: 0;
  pointer-events: none;
}
.sticky-cta.is-visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.sticky-cta i {
  font-size: 1.1rem;
  color: var(--sage-5);
  line-height: 1;
}
.sticky-cta:hover {
  background: var(--deep-10);
  color: var(--cream-50);
  text-decoration: none;
}
@media (min-width: 1024px) { .sticky-cta { display: none; } }

/* ============================================================
   LINK ARROW
   ============================================================ */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.96rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.005em;
  padding: 6px 0;
  border-bottom: 1px solid currentColor;
}
.link-arrow i { transition: transform var(--dur-base) var(--ease-out-soft); }
.link-arrow:hover i { transform: translateX(3px); }
.link-arrow:hover { color: var(--deep-11); text-decoration: none; }

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--rule-soft);
  border-radius: var(--r-l);
  padding: var(--space-l);
  position: relative;
  transition: transform var(--dur-base) var(--ease-out-soft),
              border-color var(--dur-base) var(--ease-out-soft),
              box-shadow var(--dur-base) var(--ease-out-soft);
}
.card:hover {
  border-color: var(--accent-soft);
  box-shadow: var(--shadow-m);
}

/* Magic-card spotlight (Three Journeys) */
.magic-card {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.magic-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    400px circle at var(--mx, 50%) var(--my, 50%),
    rgba(14,61,51,0.08),
    transparent 60%
  );
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out-soft);
  z-index: -1;
}
.magic-card:hover::before { opacity: 1; }

/* ============================================================
   MARQUEE
   ============================================================ */
.marquee {
  position: relative;
  display: flex;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
  padding-block: var(--space-s);
}
.marquee__row {
  display: flex;
  flex-shrink: 0;
  gap: 4rem;
  padding-right: 4rem;
  animation: marqueeMove 50s linear infinite;
  align-items: center;
  white-space: nowrap;
}
.marquee__item {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--step-1);
  font-weight: 400;
  color: var(--fg-faint);
  white-space: nowrap;
  letter-spacing: -0.005em;
}
.marquee__sep {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--sage-8);
  flex-shrink: 0;
}
@keyframes marqueeMove {
  to { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee__row { animation: none; }
}

/* ============================================================
   FAQ accordion (native details)
   ============================================================ */
.faq-item {
  border-bottom: 1px solid var(--rule);
  padding-block: var(--space-s);
}
.faq-item summary {
  font-family: var(--font-display);
  font-size: var(--step-0);
  font-weight: 500;
  color: var(--fg-display);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-s);
  padding-block: 6px;
  letter-spacing: -0.005em;
  line-height: 1.3;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '';
  width: 24px; height: 24px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230E3D33' stroke-width='1.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  transition: transform var(--dur-base) var(--ease-spring);
}
.faq-item[open] summary::after { transform: rotate(180deg); }
.faq-item__answer {
  margin-top: 12px;
  color: var(--fg-muted);
  font-size: var(--step--1);
  line-height: 1.6;
  max-width: var(--measure);
}
.faq-item[open] .faq-item__answer {
  animation: faqReveal 480ms var(--ease-out-soft);
}
@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   TAGS
   ============================================================ */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 5px 10px 4px;
  border-radius: var(--r-pill);
  background: var(--sage-2);
  color: var(--sage-12);
  border: 1px solid var(--sage-3);
  white-space: nowrap;
}

/* ============================================================
   STAT BIG
   ============================================================ */
.stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
}
.stat__num {
  font-family: var(--font-display);
  font-size: var(--step-7);
  font-weight: 400;
  line-height: 1;
  color: var(--accent-2);
  letter-spacing: -0.02em;
}
.stat__num sup { font-size: 0.5em; vertical-align: top; margin-left: 2px; }
.stat__label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
}

/* ============================================================
   LOGO MARK (SVG inline)
   ============================================================ */
.lung-child-mark {
  width: 100%;
  height: 100%;
  display: block;
}

/* ============================================================
   DIVIDER (subtle horizontal rule)
   ============================================================ */
.divider {
  display: flex;
  align-items: center;
  gap: var(--space-m);
  color: var(--fg-faint);
  margin-block: var(--space-l);
}
.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--rule);
}
.divider span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* ============================================================
   IMAGE FRAME (hero portrait)
   ============================================================ */
.img-frame {
  position: relative;
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-l);
  background: var(--bg-elev-2);
}
.img-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(14,61,51,0.08);
  pointer-events: none;
}
.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}