/* ============================================================
   AH-Clinics — NAD+ IV Therapy · 3D Scroll Experience
   Brand: forest #112623 · gold #DDAF33 · white
   ============================================================ */
:root {
  --bg: #0b1a17;
  --bg-2: #112623;          /* brand forest */
  --bg-3: #16302c;
  --ink: #f3f6f4;
  --ink-soft: #b8c8c1;
  --ink-dim: #8aa098;
  --gold: #ddaf33;
  --gold-soft: #f0d488;
  --gold-deep: #a87f17;
  --line: rgba(221, 175, 51, 0.18);
  --line-faint: rgba(243, 246, 244, 0.08);
  --glass: rgba(17, 38, 35, 0.6);
  --radius: 22px;
  --font-head: "Roboto Slab", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--gold); color: var(--bg-2); }

h1, h2, h3 { font-family: var(--font-head); font-weight: 600; line-height: 1.12; letter-spacing: -0.01em; }

.gold-grad {
  background: linear-gradient(100deg, var(--gold-soft) 0%, var(--gold) 45%, #c2922a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.inline-link { color: var(--gold); text-decoration-color: rgba(221,175,51,0.4); }
.inline-link:hover { color: var(--gold-soft); }

/* ---------- Depth background (fixed, behind everything) ---------- */
.depth-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 800px at 80% -10%, rgba(22, 48, 44, 0.9) 0%, transparent 60%),
    linear-gradient(180deg, #0d1f1b 0%, var(--bg) 50%, #0a1714 100%);
}
.grid-layer {
  position: absolute;
  inset: -10%;
  background-image:
    linear-gradient(rgba(221, 175, 51, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(221, 175, 51, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(75% 60% at 50% 38%, rgba(0,0,0,0.9), transparent 78%);
  -webkit-mask-image: radial-gradient(75% 60% at 50% 38%, rgba(0,0,0,0.9), transparent 78%);
}
/* Orbs are pre-blurred radial gradients — zero filter cost */
.orb {
  position: absolute;
  border-radius: 50%;
  will-change: transform;
}
.orb-1 {
  width: 60vw; height: 60vw; top: -22vw; right: -16vw;
  background: radial-gradient(circle, rgba(221, 175, 51, 0.16) 0%, rgba(221, 175, 51, 0.05) 38%, transparent 68%);
}
.orb-2 {
  width: 48vw; height: 48vw; top: 60vh; left: -20vw;
  background: radial-gradient(circle, rgba(48, 110, 96, 0.32) 0%, rgba(48, 110, 96, 0.1) 40%, transparent 70%);
}
.orb-3 {
  width: 36vw; height: 36vw; bottom: -14vw; right: 4vw;
  background: radial-gradient(circle, rgba(221, 175, 51, 0.1) 0%, transparent 65%);
}

main, .scrub, .footer { position: relative; z-index: 1; }

/* ---------- Film grain (cinematic texture above everything) ---------- */
.grain {
  position: fixed;
  inset: -100px;
  z-index: 80;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-shift 0.9s steps(4) infinite;
  will-change: transform;
}
@keyframes grain-shift {
  0%   { transform: translate3d(0, 0, 0); }
  25%  { transform: translate3d(-34px, 22px, 0); }
  50%  { transform: translate3d(18px, -30px, 0); }
  75%  { transform: translate3d(-26px, -14px, 0); }
  100% { transform: translate3d(0, 0, 0); }
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 44px);
  transition: background 0.35s ease, border-color 0.35s ease, backdrop-filter 0.35s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(11, 26, 23, 0.78);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--line-faint);
}
.nav-logo img {
  height: 38px; width: auto;
  /* brand logo is dark-on-light — lift it onto the dark theme */
  filter: brightness(0) invert(1) drop-shadow(0 0 1px rgba(255,255,255,0.2));
  opacity: 0.95;
}
.nav-phone {
  margin-left: auto;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.25s ease;
}
.nav-phone:hover { color: var(--gold); }
.nav-cta {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bg-2);
  background: linear-gradient(120deg, var(--gold-soft), var(--gold));
  padding: 11px 22px;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(221, 175, 51, 0.25);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(221, 175, 51, 0.4); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.03em;
  padding: 15px 32px;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.btn.big { font-size: 17px; padding: 18px 40px; }
.btn-gold {
  color: var(--bg-2);
  background: linear-gradient(120deg, var(--gold-soft) 0%, var(--gold) 60%);
  box-shadow: 0 10px 34px rgba(221, 175, 51, 0.28), inset 0 1px 0 rgba(255,255,255,0.35);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 16px 44px rgba(221, 175, 51, 0.45), inset 0 1px 0 rgba(255,255,255,0.35); }
.btn-ghost {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(221, 175, 51, 0.05);
}
.btn-ghost:hover { transform: translateY(-2px); background: rgba(221, 175, 51, 0.13); border-color: var(--gold); }

/* ---------- Shared section chrome ---------- */
section { padding: clamp(90px, 11vw, 150px) clamp(20px, 6vw, 80px); }

.kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}
section h2 {
  font-size: clamp(1.9rem, 4.4vw, 3.4rem);
  margin-bottom: 26px;
  max-width: 21ch;
}
.section-intro, .section-outro {
  max-width: 70ch;
  color: var(--ink-soft);
}
.section-outro { margin-top: 44px; font-size: 0.95rem; }

/* Centered sections */
.pricing, .signs, .faq, .testimonials, .outro { text-align: center; }
.pricing h2, .signs h2, .faq h2, .testimonials h2 { margin-inline: auto; }
.pricing .section-intro, .signs .section-intro, .faq .section-intro,
.testimonials .section-intro, .pricing .section-outro, .signs .section-outro { margin-inline: auto; }

/* ============================================================
   SCRUB sections — canvas frame-sequence stages
   ============================================================ */
.scrub { position: relative; height: 460vh; padding: 0; }
.scrub-mid { height: 420vh; }
.scrub-sticky {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
}
.scrub canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.soft-edge {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(11, 26, 23, 0.85) 0%, transparent 16%, transparent 80%, rgba(11, 26, 23, 0.95) 100%);
}
.scrub-line {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: max-content;
  max-width: 92vw;
  text-align: center;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.2rem, 6.4vw, 5.2rem);
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--ink);
  opacity: 0;
  text-shadow: 0 4px 40px rgba(11, 26, 23, 0.9);
  will-change: opacity, transform;
  z-index: 5;
}
.scrub-line.big { font-size: clamp(2.4rem, 7vw, 5.8rem); }
.scrub .chip { z-index: 6; }
.scrub .chip-1 { top: 18%; left: 10%; }
.scrub .chip-2 { bottom: 22%; right: 9%; }
.scrub .scroll-hint { z-index: 6; }

.hero-ctas { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 30px; }
.hero-ctas.center { justify-content: center; }

/* ---------- Full-bleed scrub stage with left copy panel ---------- */
.stage-overlay {
  position: absolute;
  left: clamp(16px, 6vw, 100px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: min(92vw, 560px);
  padding: clamp(24px, 3vw, 40px);
  background: rgba(11, 26, 23, 0.55);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
}
.stage-overlay h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.3rem);
  margin-bottom: 24px;
  max-width: none;
}
.step-zone { position: relative; min-height: clamp(240px, 30vh, 340px); }
.scrub-line.step {
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  max-width: 58ch;
  transform: none; /* engine writes the final transform; keep the un-centered initial state */
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.99rem;
  line-height: 1.7;
  letter-spacing: 0;
  text-align: left;
  color: var(--ink-soft);
  text-shadow: none;
}

.molecule-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-2);
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(221, 175, 51, 0.06),
    0 0 90px rgba(221, 175, 51, 0.1);
}
.molecule-card img { width: 100%; height: auto; }

/* Automatic light sweep across the hero card */
.card-shine {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.card-shine::before {
  content: "";
  position: absolute;
  top: -20%;
  bottom: -20%;
  left: -70%;
  width: 45%;
  background: linear-gradient(105deg, transparent 0%, rgba(240, 212, 136, 0.18) 50%, transparent 100%);
  transform: skewX(-18deg) translateX(0);
  animation: shine-sweep 6.5s ease-in-out infinite;
}
@keyframes shine-sweep {
  0%, 55%  { transform: skewX(-18deg) translateX(0); }
  85%, 100% { transform: skewX(-18deg) translateX(420%); }
}

/* Tilt cards: JS sets --rx/--ry/--mx/--my, CSS does the rest */
.tilt {
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform 0.18s ease-out;
  will-change: transform;
}
.card-sheen {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(240, 212, 136, 0.16), transparent 55%);
  transition: opacity 0.3s ease;
}
.tilt:hover .card-sheen { opacity: 1; }

.chip {
  position: absolute;
  z-index: 3;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-soft);
  background: var(--glass);
  border: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 10px 18px;
  border-radius: 999px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.4);
  white-space: nowrap;
  animation: float 7s ease-in-out infinite;
}
.chip-1 { animation-delay: 0s; }
.chip-2 { animation-delay: -2.4s; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

.scroll-hint {
  position: absolute;
  bottom: 30px; left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: opacity 0.4s ease;
}
.hint-line {
  width: 1px; height: 44px;
  background: linear-gradient(180deg, var(--gold), transparent);
  animation: hint 2s ease-in-out infinite;
  transform-origin: top;
}
@keyframes hint { 0%, 100% { transform: scaleY(0.4); opacity: 0.4; } 50% { transform: scaleY(1); opacity: 1; } }

/* ============================================================
   SPLIT sections (image + copy)
   ============================================================ */
.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(40px, 6vw, 90px);
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
}
.split.reverse { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); }
.split.reverse .split-media { order: 2; }
.split.reverse .split-copy { order: 1; }

.split-media { perspective: 900px; }
.media-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line-faint);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.55), 0 0 60px rgba(221, 175, 51, 0.07);
  will-change: transform;
}
.media-frame img { width: 100%; height: clamp(340px, 46vw, 560px); object-fit: cover; }
.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(221, 175, 51, 0.12) 0%, transparent 36%, rgba(11, 26, 23, 0.35) 100%);
  pointer-events: none;
}
.split-copy p { color: var(--ink-soft); margin-bottom: 16px; max-width: 62ch; }
.split-copy .btn { margin-top: 14px; }

/* ============================================================
   SCROLL EXPERIENCE — sticky benefits stage
   ============================================================ */
.exp { height: 420vh; padding: 0; }
.exp-sticky {
  position: sticky;
  top: 0;
  height: 100svh;
  overflow: hidden;
  display: grid;
  place-items: center;
  background: radial-gradient(900px 600px at 50% 60%, rgba(22, 48, 44, 0.75) 0%, transparent 65%);
}
.exp-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: center;
  gap: clamp(30px, 4vw, 70px);
  width: 100%;
  height: 100%;
  padding: 90px clamp(20px, 6vw, 90px) 40px;
  max-width: 1380px;
  margin: 0 auto;
}
.exp-intro { color: var(--ink-soft); font-size: 0.95rem; max-width: 46ch; margin-bottom: 34px; }

/* Left column: numbered steps + progress rail */
.exp-steps { position: relative; padding-left: 26px; }
.rail {
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: rgba(221, 175, 51, 0.18);
}
.rail-fill {
  position: absolute;
  inset: 0;
  background: var(--gold);
  transform: scaleY(0);
  transform-origin: top;
  will-change: transform;
}
.exp-step {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 14px 0;
  opacity: 0.35;
  transition: opacity 0.45s ease;
}
.exp-step.active { opacity: 1; }
.exp-step h3 { font-size: 1.14rem; margin-bottom: 4px; }
.exp-step p { font-size: 0.9rem; color: var(--ink-soft); max-width: 44ch; }

/* Right column: layered 3D stage */
.exp-stage {
  position: relative;
  height: min(74vh, 660px);
  perspective: 1200px;
  transform-style: preserve-3d;
  display: grid;
  place-items: center;
  overflow: visible;
}
.stage-backdrop {
  position: absolute;
  inset: -4%;
  width: 108%;
  height: 108%;
  object-fit: cover;
  opacity: 0;
  mix-blend-mode: screen;
  -webkit-mask-image: radial-gradient(circle at center, black 45%, transparent 74%);
  mask-image: radial-gradient(circle at center, black 45%, transparent 74%);
  will-change: opacity;
}
.stage-vial {
  position: absolute;
  right: 4%;
  bottom: 4%;
  width: clamp(120px, 26%, 190px);
  opacity: 0;
  will-change: transform, opacity;
}
.stage-vial img {
  width: 100%;
  mix-blend-mode: screen;
  -webkit-mask-image: radial-gradient(ellipse 50% 56% at center, black 44%, transparent 66%);
  mask-image: radial-gradient(ellipse 50% 56% at center, black 44%, transparent 66%);
}
.iv-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  will-change: opacity;
}
.iv-svg path {
  fill: none;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}
.iv-glow { stroke: rgba(221, 175, 51, 0.35); stroke-width: 6; filter: blur(5px); }
.iv-line { stroke: var(--gold); stroke-width: 2.5; }

.exp-core {
  position: relative;
  width: min(72%, 440px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  will-change: transform, opacity;
}
.core-glow {
  position: absolute;
  inset: -30%;
  background: radial-gradient(circle, rgba(221, 175, 51, 0.2) 0%, rgba(221, 175, 51, 0.05) 45%, transparent 70%);
  border-radius: 50%;
  transition: opacity 0.6s ease;
}
.core-particles {
  position: absolute;
  inset: -42%;
  width: 184%;
  height: 184%;
  pointer-events: none;
}
.core-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--line);
}
.ring-a { inset: -7%; border-style: dashed; animation: spin 60s linear infinite; }
.ring-b { inset: 5%; opacity: 0.6; animation: spin 90s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }

.core-molecule {
  width: 78%;
  height: auto;
  filter: drop-shadow(0 0 22px rgba(221, 175, 51, 0.35));
  will-change: transform;
}
.core-molecule .node {
  fill: var(--bg-2);
  stroke: var(--gold);
  stroke-width: 5;
  transition: fill 0.5s ease, stroke 0.5s ease;
}
/* per-step node highlight */
.exp-core[data-active="0"] .n1, .exp-core[data-active="0"] .n5,
.exp-core[data-active="1"] .n2, .exp-core[data-active="1"] .n6,
.exp-core[data-active="2"] .n3,
.exp-core[data-active="3"] .n4, .exp-core[data-active="3"] .n0 {
  fill: var(--gold);
  stroke: var(--gold-soft);
}

.step-num {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--gold);
  padding-top: 3px;
}

.exp-outro {
  text-align: center;
  max-width: 56ch;
  margin: 0 auto;
  padding: clamp(70px, 8vw, 110px) 24px 0;
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  color: var(--gold-soft);
}

/* ============================================================
   PRICING cards
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
  max-width: 1180px;
  margin: 56px auto 0;
  perspective: 1100px;
  text-align: left;
}
.price-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: linear-gradient(170deg, var(--bg-3) 0%, var(--bg-2) 100%);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}
.price-card.featured {
  border-color: var(--line);
  background: linear-gradient(170deg, #1b3a34 0%, var(--bg-2) 100%);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), 0 0 70px rgba(221, 175, 51, 0.12);
  padding-top: 68px; /* clears the absolute-positioned flag */
}
.price-card .flag {
  position: absolute;
  top: 18px; right: 18px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--bg-2);
  background: linear-gradient(120deg, var(--gold-soft), var(--gold));
  padding: 6px 12px;
  border-radius: 999px;
}
.price-card h3 { font-size: 1.2rem; padding-right: 30px; }
.price {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(2.6rem, 4vw, 3.4rem);
  line-height: 1;
  color: var(--gold);
}
.price sup { font-size: 0.45em; vertical-align: super; margin-right: 2px; }
.price .per { font-family: var(--font-body); font-size: 0.32em; font-weight: 500; color: var(--ink-dim); letter-spacing: 0.04em; }
.price-card > p:not(.price) { font-size: 0.94rem; color: var(--ink-soft); flex: 1; }
.price-card .btn { align-self: flex-start; font-size: 14px; padding: 12px 26px; }

/* ============================================================
   SAFETY band
   ============================================================ */
.safety { padding-inline: clamp(20px, 6vw, 80px); }
.safety-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(32px, 5vw, 70px);
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  background: linear-gradient(160deg, var(--bg-3) 0%, var(--bg-2) 75%);
  border: 1px solid var(--line-faint);
  border-radius: calc(var(--radius) * 1.4);
  padding: clamp(34px, 5vw, 70px);
  overflow: hidden;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.45);
}
.safety-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(620px circle at 12% 24%, rgba(221, 175, 51, 0.12), transparent 58%);
  pointer-events: none;
}
.safety-media { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line-faint); }
.safety-media img { width: 100%; height: 100%; min-height: 300px; object-fit: cover; }
.safety-copy p { color: var(--ink-soft); margin-bottom: 16px; max-width: 64ch; }
.safety-copy .btn { margin-top: 10px; }

/* ============================================================
   SIGNS grid
   ============================================================ */
.signs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  max-width: 1100px;
  margin: 52px auto 0;
}
.sign-chip {
  font-family: var(--font-head);
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--glass);
  border: 1px solid var(--line-faint);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 16px;
  padding: 26px 20px;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease,
              opacity 0.7s ease;
}
.sign-chip:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.4), 0 0 36px rgba(221, 175, 51, 0.14);
}

/* ============================================================
   HELP band
   ============================================================ */
.help { text-align: center; }
.help-inner { max-width: 820px; margin: 0 auto; }
.help-inner h2 { margin-inline: auto; max-width: 24ch; }
.help-inner p { color: var(--ink-soft); margin-bottom: 18px; text-align: left; }
.help .btn { margin-top: 14px; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { max-width: 820px; margin: 50px auto 0; text-align: left; }
.faq-item {
  background: var(--glass);
  border: 1px solid var(--line-faint);
  border-radius: 16px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.faq-item[open] { border-color: var(--line); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 22px 26px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon {
  position: relative;
  flex: 0 0 16px;
  height: 16px;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  inset: 50% auto auto 0;
  width: 16px; height: 2px;
  background: var(--gold);
  transition: transform 0.3s ease;
}
.faq-icon::after { transform: rotate(90deg); }
.faq-item[open] .faq-icon::after { transform: rotate(0deg); }
.faq-item p { padding: 0 26px 24px; color: var(--ink-soft); font-size: 0.96rem; }

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.quote-wall {
  columns: 3 300px;
  column-gap: 22px;
  max-width: 1180px;
  margin: 52px auto 0;
  text-align: left;
}
.quote-card {
  break-inside: avoid;
  margin-bottom: 22px;
  background: linear-gradient(170deg, var(--bg-3) 0%, var(--bg-2) 100%);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease,
              opacity 0.7s ease;
}
.quote-card:hover {
  border-color: var(--line);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
}
.stars { color: var(--gold); letter-spacing: 4px; font-size: 14px; }
.quote-card blockquote { margin: 12px 0 16px; font-size: 0.94rem; color: var(--ink-soft); }
.quote-card figcaption {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--gold-soft);
}
.quote-card figcaption::after {
  content: " · Verified Google review";
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.78rem;
  color: var(--ink-dim);
}

/* ============================================================
   FOUNDERS — the doctors behind the clinic
   ============================================================ */
.founders { text-align: center; }
.founders h2 { margin-inline: auto; }
.founder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 26px;
  max-width: 1180px;
  margin: 56px auto 0;
  perspective: 1100px;
  text-align: left;
}
.founder-card {
  position: relative;
  background: linear-gradient(170deg, var(--bg-3) 0%, var(--bg-2) 100%);
  border: 1px solid var(--line-faint);
  border-radius: var(--radius);
  padding: 40px 36px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.founder-card:hover {
  border-color: var(--line);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5), 0 0 60px rgba(221, 175, 51, 0.1);
}
.founder-card::before {
  content: "";
  position: absolute;
  top: -40%; right: -25%;
  width: 70%; aspect-ratio: 1;
  background: radial-gradient(circle, rgba(221, 175, 51, 0.1) 0%, transparent 65%);
  pointer-events: none;
}
.founder-photo {
  position: relative;
  width: 136px;
  aspect-ratio: 1;
  margin-bottom: 22px;
}
.founder-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  border-radius: 50%;
  /* warm editorial monochrome — unifies the source headshots with the brand */
  filter: grayscale(1) sepia(0.24) contrast(1.06) brightness(1.05);
}
.photo-ring {
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  box-shadow: 0 0 24px rgba(221, 175, 51, 0.25), inset 0 0 18px rgba(221, 175, 51, 0.12);
  pointer-events: none;
}
.founder-card h3 { font-size: 1.4rem; margin-bottom: 8px; }
.founder-role {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 18px;
  line-height: 1.7;
}
.founder-bio p { font-size: 0.93rem; color: var(--ink-soft); margin-bottom: 12px; }

/* ============================================================
   OUTRO — final CTA with glow depth
   ============================================================ */
.outro {
  position: relative;
  min-height: 92svh;
  display: grid;
  place-content: center;
  overflow: hidden;
}
.outro h2 { font-size: clamp(2.3rem, 5.6vw, 4.4rem); margin-bottom: 14px; }
.outro-glow { position: absolute; inset: 0; display: grid; place-items: center; pointer-events: none; }
.glow-core {
  position: absolute;
  width: min(70vw, 760px);
  aspect-ratio: 1;
  background: radial-gradient(circle, rgba(221, 175, 51, 0.18) 0%, rgba(221, 175, 51, 0.05) 42%, transparent 68%);
  border-radius: 50%;
}
.glow-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--line);
}
.glow-ring.r1 { width: min(58vw, 640px); aspect-ratio: 1; border-style: dashed; animation: spin 80s linear infinite; }
.glow-ring.r2 { width: min(78vw, 880px); aspect-ratio: 1; opacity: 0.5; animation: spin 120s linear infinite reverse; }
.outro .kicker, .outro h2, .outro .hero-ctas { position: relative; z-index: 2; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--line-faint);
  background: rgba(9, 20, 17, 0.85);
  padding: 70px clamp(20px, 6vw, 80px) 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 0.8fr 1fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto 50px;
}
.f-col img { height: 42px; width: auto; margin-bottom: 26px; filter: brightness(0) invert(1); opacity: 0.92; }
.f-col h3 {
  font-size: 0.85rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 14px;
}
.f-col h3:not(:first-child) { margin-top: 26px; }
.f-col p, .f-col li { font-size: 0.92rem; color: var(--ink-soft); margin-bottom: 8px; }
.f-col ul { list-style: none; }
.f-col a { text-decoration: none; transition: color 0.2s ease; }
.f-col a:hover { color: var(--gold); }
.f-social { display: flex; gap: 16px; }
.f-social a { color: var(--gold-soft); }
.footer-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 26px;
  border-top: 1px solid var(--line-faint);
  font-size: 0.8rem;
  color: var(--ink-dim);
}
.footer-base a { color: var(--ink-soft); text-decoration: none; }
.footer-base a:hover { color: var(--gold); }

/* ============================================================
   Scroll reveals (IntersectionObserver toggles .in)
   ============================================================ */
.reveal {
  opacity: 0;
  transform: perspective(900px) translateY(38px) rotateX(7deg);
  transition: opacity 0.75s ease, transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }
.reveal.d4 { transition-delay: 0.32s; }
.reveal.in { opacity: 1; transform: perspective(900px) translateY(0) rotateX(0deg); }

/* ============================================================
   Reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .chip, .hint-line, .core-ring, .glow-ring { animation: none; }
  .grain, .card-shine::before { animation: none; }
  /* scrub stages collapse to a static poster (frame 0) with stacked copy */
  .scrub, .scrub-mid { height: auto; }
  .stage-overlay { position: static; transform: none; margin: 0 auto; }
  .stage-left .scrub-sticky { min-height: 0; padding: 90px clamp(16px, 6vw, 100px); display: block; }
  .step-zone { min-height: 0; }
  .scrub-line.step { position: static; margin-bottom: 16px; }
  .scrub-sticky {
    position: relative;
    height: auto;
    min-height: 76svh;
    display: grid;
    place-content: center;
    gap: 18px;
    padding: 120px 24px 80px;
  }
  .scrub-line {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    width: auto;
  }
  .scrub .chip { display: none; }
  .tilt { transform: none !important; transition: none; }
  .exp { height: auto; }
  .exp-sticky { position: static; height: auto; }
  .exp-grid { grid-template-columns: 1fr; height: auto; padding-block: 90px; }
  .exp-step { opacity: 1; }
  .exp-stage { height: auto; aspect-ratio: 1; max-width: 520px; margin: 0 auto; }
  .stage-backdrop { opacity: 0.4; }
  .stage-vial { opacity: 1; }
  .iv-svg { opacity: 1; }
  .rail-fill { transform: scaleY(1); }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .stage-overlay {
    left: 12px;
    right: 12px;
    top: auto;
    bottom: 16px;
    transform: none;
    width: auto;
    padding: 18px 20px;
    background: rgba(11, 26, 23, 0.72);
  }
  .stage-overlay h2 { font-size: clamp(1.2rem, 3.4vw, 1.7rem); margin-bottom: 14px; }
  .stage-overlay .kicker { margin-bottom: 8px; }
  .step-zone { min-height: clamp(220px, 34vh, 330px); }
  .scrub-line.step { font-size: 0.88rem; line-height: 1.6; }
  .split, .split.reverse { grid-template-columns: 1fr; }
  .split.reverse .split-media { order: 0; }
  .split-media { max-width: 620px; margin: 0 auto; width: 100%; }
  .media-frame img { height: clamp(300px, 52vw, 460px); }
  .safety-inner { grid-template-columns: 1fr; }
  .safety-media img { max-height: 320px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-phone { display: none; }
  .nav-logo img { height: 30px; }
  .grain { animation: none; }   /* static grain on mobile — saves battery */
  .scrub { height: 360vh; }
  .scrub-mid { height: 320vh; }
  /* readability scrim: the 16:9 frames crop bright on portrait screens */
  .scrub .soft-edge {
    background:
      linear-gradient(180deg, rgba(11, 26, 23, 0.85) 0%, transparent 16%, transparent 80%, rgba(11, 26, 23, 0.95) 100%),
      radial-gradient(120% 34% at 50% 50%, rgba(11, 26, 23, 0.42) 0%, transparent 70%);
  }
  .stage-left .soft-edge { background: linear-gradient(180deg, rgba(11, 26, 23, 0.85) 0%, transparent 16%, transparent 70%, rgba(11, 26, 23, 0.95) 100%); }
  .scrub-line { text-shadow: 0 3px 26px rgba(11, 26, 23, 1), 0 1px 6px rgba(11, 26, 23, 0.9); }
  .chip { font-size: 10px; padding: 8px 13px; }
  .scrub .chip-1 { left: 5%; top: 14%; }
  .scrub .chip-2 { right: 5%; bottom: 18%; }

  /* Sticky stage on small screens: stage on top, only the active step below */
  .exp { height: 380vh; }
  .exp-grid {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 1fr) auto;
    gap: 8px;
    padding: 76px 18px 26px;
    align-items: start;
  }
  .exp-rail-col { order: 2; }
  .exp-stage { order: 1; height: min(46vh, 380px); }
  .exp-intro { display: none; }
  .exp-steps { padding-left: 0; }
  .rail { display: none; }
  .exp-step { display: none; padding: 10px 0 0; }
  .exp-step.active { display: flex; }
  .exp-step h3 { font-size: 1.1rem; }
  .exp-step p { font-size: 0.88rem; }
  .stage-vial { width: clamp(96px, 24%, 150px); }

  .quote-wall { columns: 1; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .btn.big { font-size: 15px; padding: 15px 26px; }
}