/* =====================================================
   HVAX — BidEyes Landing Page  v2
   style.css
   ===================================================== */

/* ── Reset & Base ──────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Palette */
  --ink:          #0a0c10;
  --ink-muted:    #3a3f4a;
  --ink-subtle:   #6b7280;
  --surface:      #ffffff;
  --surface-2:    #f8f9fb;
  --surface-3:    #f0f2f5;
  --border:       #e4e7ed;
  --border-light: #f0f2f5;

  /* Brand */
  --accent:       #1a56db;
  --accent-dark:  #1044b8;
  --accent-light: #dbeafe;
  --accent-glow:  rgba(26, 86, 219, 0.14);

  /* Semantic */
  --danger:  #ef4444;
  --warn:    #f59e0b;
  --purple:  #8b5cf6;
  --teal:    #14b8a6;
  --emerald: #10b981;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Type scale */
  --text-xs:   0.75rem;    /* 12px */
  --text-sm:   0.875rem;   /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */
  --text-xl:   1.25rem;    /* 20px */
  --text-2xl:  1.5rem;     /* 24px */
  --text-3xl:  1.875rem;   /* 30px */
  --text-4xl:  2.25rem;    /* 36px */
  --text-5xl:  3rem;       /* 48px */
  --text-6xl:  3.75rem;    /* 60px */
  --text-7xl:  4.5rem;     /* 72px */

  /* Spacing (4px base) */
  --s-1:  0.25rem;
  --s-2:  0.5rem;
  --s-3:  0.75rem;
  --s-4:  1rem;
  --s-5:  1.25rem;
  --s-6:  1.5rem;
  --s-8:  2rem;
  --s-10: 2.5rem;
  --s-12: 3rem;
  --s-16: 4rem;
  --s-20: 5rem;
  --s-24: 6rem;
  --s-32: 8rem;

  /* Radius */
  --r-sm:   4px;
  --r-md:   8px;
  --r-lg:   12px;
  --r-xl:   16px;
  --r-2xl:  24px;
  --r-full: 9999px;

  /* Shadows */
  --sh-xs:     0 1px 2px rgba(0,0,0,0.05);
  --sh-sm:     0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --sh-md:     0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
  --sh-lg:     0 12px 32px rgba(0,0,0,0.09), 0 4px 8px rgba(0,0,0,0.04);
  --sh-xl:     0 24px 56px rgba(0,0,0,0.11), 0 8px 16px rgba(0,0,0,0.05);
  --sh-accent: 0 8px 24px rgba(26, 86, 219, 0.24);

  /* Easing */
  --ease:      cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:  cubic-bezier(0, 0, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);

  /* Duration */
  --d-fast: 120ms;
  --d-base: 200ms;
  --d-slow: 320ms;
  --d-in:   480ms;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4 {
  line-height: 1.15;
  letter-spacing: -0.025em;
  font-weight: 700;
}

p { color: var(--ink-muted); }

a {
  color: inherit;
  text-decoration: none;
}

img, svg { display: block; }

/* ── Layout ────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--s-6);
}

/* ── Label chip ────────────────────────────────────── */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  padding: 4px 10px;
  border-radius: var(--r-full);
  line-height: 1;
}

.chip--dark {
  background: rgba(26, 86, 219, 0.18);
  color: #93b4f8;
}

/* ── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-6);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  transition: background var(--d-base) var(--ease),
              transform var(--d-base) var(--ease-spring),
              box-shadow var(--d-base) var(--ease);
  white-space: nowrap;
  letter-spacing: -0.01em;
  text-decoration: none;
  line-height: 1;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--sh-accent);
}

.btn--primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(26, 86, 219, 0.32);
}

.btn--primary:active { transform: translateY(0); box-shadow: var(--sh-accent); }

.btn--ghost {
  background: transparent;
  color: var(--ink-muted);
  border: 1.5px solid var(--border);
}

.btn--ghost:hover {
  background: var(--surface-2);
  color: var(--ink);
  border-color: rgba(0,0,0,0.2);
}

.btn--ghost-white {
  background: transparent;
  color: rgba(255,255,255,0.7);
  border: 1.5px solid rgba(255,255,255,0.15);
}

.btn--ghost-white:hover {
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.9);
  border-color: rgba(255,255,255,0.3);
}

.btn--lg  { padding: 0.9rem var(--s-8);  font-size: var(--text-base); border-radius: var(--r-lg); }
.btn--xl  { padding: 1.05rem var(--s-10); font-size: var(--text-lg);  border-radius: var(--r-lg); }

/* ── Navigation ────────────────────────────────────── */
.nav {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 200;
  /* transparent by default */
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  border-bottom: 1px solid rgba(0,0,0,0.07);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: var(--s-8);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__wordmark {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--ink);
  line-height: 1;
}

.nav__sep {
  width: 1px;
  height: 14px;
  background: var(--border);
}

.nav__product {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  list-style: none;
  margin-inline: auto; /* center the links */
}

.nav__links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink-muted);
  transition: color var(--d-fast) var(--ease);
  white-space: nowrap;
}

.nav__links a:hover { color: var(--ink); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  flex-shrink: 0;
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4.5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--r-md);
  transition: background var(--d-fast) var(--ease);
}

.nav__hamburger:hover { background: var(--surface-2); }

.nav__hamburger span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: all var(--d-base) var(--ease);
  transform-origin: center;
}

.nav__hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav__mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: var(--s-4) var(--s-6) var(--s-6);
  gap: var(--s-1);
}

.nav__mobile-menu.open { display: flex; }

.nav__mobile-menu a {
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--ink-muted);
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--border-light);
}

.nav__mobile-menu a:last-of-type { border: none; }

.nav__mobile-btn {
  margin-top: var(--s-4);
  width: 100%;
}

/* ── Hero ──────────────────────────────────────────── */
.hero {
  padding-top: calc(60px + 96px);
  padding-bottom: 100px;
  position: relative;
  overflow: hidden;
}

/* Dark gradient at the very top edge */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 100% 80% at 50% -5%,  rgba(26, 86, 219, 0.08) 0%, transparent 65%),
    radial-gradient(ellipse 70%  50% at 20% 110%, rgba(26, 86, 219, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 50%  40% at 85% 90%,  rgba(139, 92, 246, 0.03) 0%, transparent 60%);
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 75%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-subtle);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: var(--r-full);
  margin-bottom: var(--s-8);
  box-shadow: var(--sh-xs);
}

.hero__eyebrow .live-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.65); }
}

.hero__headline {
  font-size: clamp(2.2rem, 8vw, var(--text-7xl));
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.06;
  color: var(--ink);
  max-width: 840px;
  margin-bottom: var(--s-6);
}

.hero__headline em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}

.hero__headline em::after {
  content: '';
  position: absolute;
  left: 0; right: 0;
  bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent) 0%, rgba(26,86,219,0.15) 100%);
  border-radius: 2px;
}

.hero__sub {
  font-size: clamp(var(--text-lg), 2vw, var(--text-xl));
  color: var(--ink-muted);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: var(--s-10);
}

.hero__cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  justify-content: center;
  align-items: center;
  margin-bottom: var(--s-5);
}

.hero__footnote {
  font-size: var(--text-xs);
  color: var(--ink-subtle);
  letter-spacing: 0.01em;
  margin-bottom: var(--s-16);
}

/* ── Hero UI Preview ───────────────────────────────── */
.hero__preview {
  width: 100%;
  max-width: 900px;
  position: relative;
}

/* Ambient glow beneath the card */
.hero__preview::before {
  content: '';
  position: absolute;
  inset: 16px 40px -24px;
  background: radial-gradient(ellipse at center, rgba(26,86,219,0.18) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(24px);
  z-index: 0;
}

.review-card {
  position: relative;
  z-index: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  box-shadow:
    var(--sh-xl),
    0 0 0 1px rgba(255,255,255,0.8) inset;
  overflow: hidden;
}

.review-card__header {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding: 12px 20px;
  border-bottom: 1px solid var(--border-light);
  background: var(--surface-2);
}

.rc-dots { display: flex; gap: 6px; }
.rc-dots span {
  width: 10px; height: 10px; border-radius: 50%;
}
.rc-dots span:nth-child(1) { background: #ff5f57; }
.rc-dots span:nth-child(2) { background: #febc2e; }
.rc-dots span:nth-child(3) { background: #28c840; }

.rc-title {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--ink-subtle);
  letter-spacing: 0.02em;
}

.review-card__body {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  min-height: 300px;
}

/* Left pane: doc skeleton */
.doc-pane {
  padding: var(--s-5) var(--s-6);
  border-right: 1px solid var(--border-light);
}

.pane-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-subtle);
  margin-bottom: var(--s-4);
}

.doc-skeleton { display: flex; flex-direction: column; gap: 9px; }

.sk-line {
  height: 9px;
  border-radius: var(--r-sm);
  animation: sk-pulse 2.8s ease-in-out infinite;
}

.sk-line--plain  { background: var(--surface-3); }
.sk-line--blue   { background: rgba(26, 86, 219, 0.15); }
.sk-line--amber  { background: rgba(245, 158, 11, 0.18); }

@keyframes sk-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.55; }
}

/* Right pane: findings */
.findings-pane {
  padding: var(--s-5) var(--s-6);
}

.findings-list { display: flex; flex-direction: column; gap: 8px; }

.fi {
  display: flex;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border-left: 2.5px solid transparent;
  animation: fi-enter 0.45s var(--ease-out) both;
}

.fi--red    { border-color: var(--danger); }
.fi--amber  { border-color: var(--warn); }
.fi--purple { border-color: var(--purple); }
.fi--blue   { border-color: var(--accent); }

@keyframes fi-enter {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fi__badge {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  margin-top: 1px;
}

.fi__badge--red    { background: #fee2e2; }
.fi__badge--amber  { background: #fef3c7; }
.fi__badge--purple { background: #ede9fe; }
.fi__badge--blue   { background: var(--accent-light); }

.fi__body { min-width: 0; }

.fi__title {
  font-size: 11px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 2px;
}

.fi__desc {
  font-size: 10.5px;
  color: var(--ink-subtle);
  line-height: 1.45;
}

/* ── Section shared ────────────────────────────────── */
.sec { padding-block: var(--s-32); }
.sec--sm { padding-block: var(--s-24); }

.sec-head {
  margin-bottom: var(--s-16);
}

.sec-head--center {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--s-16);
}

.sec-title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  color: var(--ink);
  margin-top: var(--s-4);
  margin-bottom: var(--s-5);
}

.sec-sub {
  font-size: var(--text-lg);
  color: var(--ink-muted);
  line-height: 1.7;
}

/* ── Problem Section ───────────────────────────────── */
.problem {
  background: var(--ink);
  position: relative;
  overflow: hidden;
}

.problem::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 70% at 50% -20%, rgba(26,86,219,0.22) 0%, transparent 60%),
    radial-gradient(ellipse 40% 40% at 85% 110%, rgba(139,92,246,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.problem .sec-title   { color: #fff; }
.problem .sec-sub     { color: rgba(255,255,255,0.55); }
.problem .chip--dark  { /* handled by class */ }

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}

.problem-card {
  padding: var(--s-6);
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--r-xl);
  transition: background var(--d-base) var(--ease),
              border-color var(--d-base) var(--ease),
              transform var(--d-base) var(--ease);
  position: relative;
  overflow: hidden;
}

.problem-card:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.14);
  transform: translateY(-2px);
}

.problem-card__num {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.2);
  margin-bottom: var(--s-4);
  font-variant-numeric: tabular-nums;
}

.problem-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  margin-bottom: var(--s-3);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.problem-card p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
  line-height: 1.65;
}

/* ── Product Section ───────────────────────────────── */
.product {
  background: var(--surface-2);
}

.product__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-20);
  align-items: center;
}

.product__visual {}

.product-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
}

.pf-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--s-5);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  transition: box-shadow var(--d-base) var(--ease), border-color var(--d-base) var(--ease);
}

.pf-card:hover {
  box-shadow: var(--sh-md);
  border-color: rgba(26,86,219,0.2);
}

.pf-card__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}

.pf-card h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.pf-card p {
  font-size: var(--text-xs);
  color: var(--ink-subtle);
  line-height: 1.6;
}

.product__copy {
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
}

.product__copy .sec-title {
  font-size: clamp(var(--text-3xl), 3.5vw, 2.6rem);
}

.product__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
}

.product__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.55;
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--border-light);
}

.product__list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.li-check {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.li-check svg {
  width: 10px;
  height: 10px;
}

/* ── What BidEyes Finds ────────────────────────────── */
.finds {
  background: var(--surface);
}

.finds-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}

.find-card {
  padding: var(--s-6);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  background: var(--surface);
  position: relative;
  overflow: hidden;
  transition: border-color var(--d-base) var(--ease),
              box-shadow var(--d-base) var(--ease),
              transform var(--d-base) var(--ease);
}

.find-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--fc-color, var(--accent));
  opacity: 0;
  transition: opacity var(--d-base) var(--ease);
}

.find-card:hover {
  border-color: var(--fc-color, var(--accent));
  box-shadow: 0 8px 28px rgba(0,0,0,0.07);
  transform: translateY(-3px);
}

.find-card:hover::after { opacity: 1; }

.find-card[data-c="red"]    { --fc-color: var(--danger); }
.find-card[data-c="amber"]  { --fc-color: var(--warn); }
.find-card[data-c="blue"]   { --fc-color: var(--accent); }
.find-card[data-c="purple"] { --fc-color: var(--purple); }
.find-card[data-c="teal"]   { --fc-color: var(--teal); }
.find-card[data-c="green"]  { --fc-color: var(--emerald); }

.find-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  margin-bottom: var(--s-4);
  border: 1px solid var(--border-light);
}

.find-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: var(--s-2);
  letter-spacing: -0.02em;
}

.find-card p {
  font-size: var(--text-sm);
  color: var(--ink-subtle);
  line-height: 1.65;
}

/* ── How It Works ──────────────────────────────────── */
.how {
  background: var(--ink);
  position: relative;
  overflow: hidden;
}

.how::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 80% at 50% 100%, rgba(26,86,219,0.15) 0%, transparent 60%);
  pointer-events: none;
}

.how .sec-title  { color: #fff; }
.how .sec-sub    { color: rgba(255,255,255,0.5); }
.how .chip--dark { /* handled */ }

.how-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-6);
  position: relative;
}

/* Connecting line */
.how-steps::before {
  content: '';
  position: absolute;
  top: 32px; /* center of the 64px step number circle */
  left: calc(12.5% + 24px);
  right: calc(12.5% + 24px);
  height: 1px;
  background: linear-gradient(90deg,
    rgba(26,86,219,0.6) 0%,
    rgba(26,86,219,0.3) 50%,
    rgba(255,255,255,0.1) 100%);
  z-index: 0;
}

.how-step {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--s-5);
}

.how-step__num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  font-weight: 800;
  color: rgba(255,255,255,0.5);
  transition: all var(--d-slow) var(--ease-spring);
  font-variant-numeric: tabular-nums;
}

.how-step:hover .how-step__num {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 6px rgba(26,86,219,0.15), var(--sh-accent);
  transform: scale(1.1);
}

.how-step h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  letter-spacing: -0.025em;
}

.how-step p {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
  line-height: 1.7;
  max-width: 180px;
}

/* ── For Who ───────────────────────────────────────── */
.for-who {
  background: var(--surface-2);
}

.for-who__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-20);
  align-items: start;
}

.for-who__copy {
  display: flex;
  flex-direction: column;
  gap: var(--s-6);
  position: sticky;
  top: 84px;
}

.for-who__copy .sec-title {
  font-size: clamp(var(--text-3xl), 3.5vw, 2.6rem);
}

.roles-list {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}

.role-item {
  display: flex;
  align-items: flex-start;
  gap: var(--s-4);
  padding: var(--s-5);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  transition: border-color var(--d-base) var(--ease),
              box-shadow var(--d-base) var(--ease);
}

.role-item:hover {
  border-color: rgba(26,86,219,0.25);
  box-shadow: 0 4px 16px rgba(26,86,219,0.08);
}

.role-item__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.role-item h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  margin-bottom: 3px;
}

.role-item p {
  font-size: var(--text-xs);
  color: var(--ink-subtle);
  line-height: 1.5;
}

.for-who__detail {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
}

.detail-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
}

.detail-block__head {
  padding: var(--s-4) var(--s-5);
  border-bottom: 1px solid var(--border-light);
  background: var(--surface-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-subtle);
}

.detail-block__body {
  padding: var(--s-4) var(--s-5);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}

.tag {
  font-size: var(--text-xs);
  font-weight: 500;
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--ink-muted);
}

.tag--on {
  background: var(--accent-light);
  border-color: rgba(26,86,219,0.2);
  color: var(--accent);
  font-weight: 600;
}

/* ── Final CTA ─────────────────────────────────────── */
.final-cta {
  background: var(--surface);
  border-top: 1px solid var(--border-light);
}

.final-cta__inner {
  max-width: 680px;
  margin-inline: auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-6);
}

.final-cta .sec-title {
  font-size: clamp(var(--text-3xl), 4.5vw, var(--text-5xl));
}

.final-cta__note {
  font-size: var(--text-sm);
  color: var(--ink-subtle);
}

.final-cta__note a {
  color: var(--accent);
  text-underline-offset: 3px;
  text-decoration: underline;
}

/* ── Footer ────────────────────────────────────────── */
.footer {
  background: var(--ink);
  padding-block: var(--s-10);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-8);
  flex-wrap: wrap;
}

.footer__left {
  display: flex;
  flex-direction: column;
  gap: var(--s-1);
}

.footer__wordmark {
  font-size: var(--text-sm);
  font-weight: 800;
  letter-spacing: -0.05em;
  color: #fff;
}

.footer__byline {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
}

.footer__links {
  display: flex;
  gap: var(--s-6);
}

.footer__links a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.45);
  transition: color var(--d-fast) var(--ease);
}

.footer__links a:hover { color: rgba(255,255,255,0.85); }

.footer__copy {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.25);
}

/* ── Modal ─────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 12, 16, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--s-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--d-slow) var(--ease);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--surface);
  border-radius: var(--r-2xl);
  box-shadow: var(--sh-xl), 0 0 0 1px rgba(0,0,0,0.06);
  width: 100%;
  max-width: 480px;
  padding: var(--s-10);
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--d-slow) var(--ease-spring);
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: var(--s-4);
  right: var(--s-4);
  width: 32px;
  height: 32px;
  border: none;
  background: var(--surface-2);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-subtle);
  font-size: 20px;
  line-height: 1;
  transition: background var(--d-fast) var(--ease), color var(--d-fast) var(--ease);
}

.modal__close:hover { background: var(--surface-3); color: var(--ink); }

.modal__chip {
  margin-bottom: var(--s-4);
}

.modal h2 {
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.03em;
  margin-bottom: var(--s-2);
}

.modal__desc {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.6;
  margin-bottom: var(--s-6);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--s-4);
}

.form-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
}

.form-opt {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--ink-subtle);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--s-3) var(--s-4);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--surface);
  transition: border-color var(--d-fast) var(--ease), box-shadow var(--d-fast) var(--ease);
  outline: none;
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea { resize: vertical; min-height: 72px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
}

.form-submit { width: 100%; margin-top: var(--s-2); }

.form-success {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: var(--s-4);
  text-align: center;
  padding: var(--s-8) 0 var(--s-4);
}

.success-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #d1fae5;
  border: 2px solid #6ee7b7;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.form-success h3 {
  font-size: var(--text-xl);
  color: var(--ink);
}

.form-success p {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  max-width: 320px;
  line-height: 1.6;
}

/* ── Scroll Reveal ─────────────────────────────────── */
@keyframes reveal-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fi-enter {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--d-in) var(--ease-out),
              transform var(--d-in) var(--ease-out);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Hero elements: above fold — animate in with keyframes, no JS observer needed */
.hero .reveal {
  opacity: 1;
  transform: none;
  transition: none;
}

.hero__eyebrow  { animation: reveal-up 0.5s 0.05s var(--ease-out) both; }
.hero__headline { animation: reveal-up 0.6s 0.15s var(--ease-out) both; }
.hero__sub      { animation: reveal-up 0.6s 0.28s var(--ease-out) both; }
.hero__cta-row  { animation: reveal-up 0.6s 0.40s var(--ease-out) both; }
.hero__footnote { animation: reveal-up 0.5s 0.50s var(--ease-out) both; }
.hero__preview  { animation: reveal-up 0.7s 0.60s var(--ease-out) both; }

/* Delay variants for other sections */
.reveal--d1 { transition-delay:  80ms; }
.reveal--d2 { transition-delay: 160ms; }
.reveal--d3 { transition-delay: 240ms; }
.reveal--d4 { transition-delay: 320ms; }
.reveal--d5 { transition-delay: 400ms; }

/* ── Field error ───────────────────────────────────── */
.field-error {
  border-color: var(--danger) !important;
  box-shadow: 0 0 0 3px rgba(239,68,68,0.12) !important;
}

/* ── Responsive ────────────────────────────────────── */
@media (max-width: 1024px) {
  .product__inner,
  .for-who__inner {
    grid-template-columns: 1fr;
    gap: var(--s-12);
  }

  .for-who__copy {
    position: static;
  }

  .product-features {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .problem-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .finds-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .how-steps {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s-8);
  }

  .how-steps::before { display: none; }
}

@media (max-width: 768px) {
  .sec  { padding-block: var(--s-20); }

  /* Hide nav links AND all nav action buttons — hamburger only */
  .nav__links,
  .nav__actions {
    display: none;
  }

  .nav__hamburger { display: flex; }

  .hero {
    padding-top: calc(60px + 48px);
    padding-bottom: 56px;
  }

  .review-card__body {
    grid-template-columns: 1fr;
  }

  .doc-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-light);
  }

  .form-row { grid-template-columns: 1fr; }

  .footer__inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .finds-grid,
  .problem-grid,
  .how-steps,
  .product-features {
    grid-template-columns: 1fr;
  }

  .hero__cta-row {
    flex-direction: column;
    width: 100%;
  }

  .hero__cta-row .btn { width: 100%; }

  .modal { padding: var(--s-6); }

  .footer__links { flex-wrap: wrap; gap: var(--s-4); }
}

/* ── Reduced Motion ────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  html    { scroll-behavior: auto; }
}

/* ── About HVAX (Footer addition) ──────────────────── */
.footer__about {
  margin-top: var(--s-6);
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.6;
  max-width: 480px;
}

/* Accessibility Focus Visible */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}