/* =========================================================================
   HealthLit — marketing site styles
   Brand: clay (primary accent) + ink on warm cream paper, with
   Playfair Display (display headings) + DM Sans (UI/body) + DM Mono (labels).
   Soft, rounded, generous whitespace — "clinical warmth."
   ========================================================================= */

:root {
  /* HealthLit brand palette */
  --ink:        #1D2A2F;  /* primary ink — headings & wordmark "Health" */
  --clay:       #C2734E;  /* primary accent — wordmark "Lit", links, buttons */
  --paper:      #F4EEE3;  /* warm cream background */
  --card-tint:  #EDE5D6;  /* sand — tinted section surface */
  --body:       #46403A;  /* body copy */
  --muted:      #8A7E6C;  /* muted labels / captions */
  --green:      #3F5C49;  /* secondary accent */
  --gold:       #B8892C;  /* secondary accent */

  /* Legacy aliases mapped onto the HealthLit palette so existing rules
     resolve without churn. No new colors are introduced. */
  --lav: var(--clay);   --lav-word: var(--clay); --lav-deep: var(--clay);
  --lav-tint: var(--card-tint); --lav-soft: var(--card-tint);
  --mint: var(--green); --mint-deep: var(--green); --mint-tint: var(--card-tint);
  --amber: var(--gold); --amber-deep: var(--gold); --amber-tint: var(--card-tint);
  --rose: var(--clay);  --rose-deep: var(--clay); --rose-tint: var(--card-tint);

  --ink-mid:    var(--body);
  --ink-light:  var(--muted);
  --ink-faint:  var(--muted);
  --paper-2:    var(--card-tint);
  --line:       #E0D5C4;  /* warm border tuned to cream */
  --card:       #ffffff;

  /* Type */
  --serif: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --sans:  'DM Sans', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --label: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Shadows (warm-tinted) */
  --shadow-sm: 0 1px 3px rgba(40,32,22,.06);
  --shadow-md: 0 8px 26px rgba(50,40,28,.10);
  --shadow-lg: 0 20px 54px rgba(50,40,28,.16);

  --maxw: 1140px;
  --radius: 18px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--lav-deep); text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* Accessibility: visible focus + reduced motion */
:focus-visible { outline: 3px solid var(--lav-deep); outline-offset: 3px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 1000;
  background: var(--ink); color: #fff; padding: 12px 18px; border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Layout helpers ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 92px 0; }
.section--tint { background: var(--paper-2); }
.eyebrow {
  font-family: var(--label);
  font-size: 12.5px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--lav-deep);
  display: inline-flex; align-items: center; gap: 9px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--lav); display: inline-block;
}
.section__head { max-width: 720px; margin-bottom: 52px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.12; letter-spacing: -.01em; }
h2 { font-size: clamp(30px, 4.2vw, 44px); color: var(--ink); }
h3 { font-size: 21px; }
.lead { font-size: clamp(18px, 2.2vw, 21px); color: var(--ink-mid); line-height: 1.55; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 14px 26px; border-radius: 999px;
  font-size: 16px; font-weight: 600; line-height: 1;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--lav-deep); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--ink); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--ink); border: 1.5px solid var(--line); }
.btn--ghost:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn .arrow { transition: transform .15s ease; }
.btn:hover .arrow { transform: translateX(3px); }

/* ===================== Header / Nav ===================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(244,238,227,.82);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.wordmark { display: inline-flex; align-items: baseline; font-family: var(--sans); font-size: 24px; font-weight: 600; letter-spacing: -.015em; text-decoration: none; line-height: 1; }
.wm-health { color: #1D2A2F; }
.wm-lit { color: #C2734E; }
/* dark backgrounds (footer / dark bands): add class "wordmark--reversed" */
.wordmark--reversed .wm-health, .wordmark--reversed .wm-lit { color: #F4EEE3; }
.nav__links { display: flex; align-items: center; gap: 6px; }
.nav__links a { color: var(--ink-mid); font-size: 15px; font-weight: 500; padding: 9px 14px; border-radius: 999px; transition: color .15s, background .15s; }
.nav__links a:hover { color: var(--ink); background: var(--paper-2); }
.nav__links .btn { margin-left: 8px; padding: 11px 20px; font-size: 15px; }
.nav__toggle { display: none; width: 44px; height: 44px; border-radius: 12px; align-items: center; justify-content: center; }
.nav__toggle span, .nav__toggle span::before, .nav__toggle span::after {
  content: ""; display: block; width: 22px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform .2s, opacity .2s;
}
.nav__toggle span::before { transform: translateY(-7px); }
.nav__toggle span::after { transform: translateY(5px); }
.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { transform: rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after { transform: rotate(-45deg) translateY(-1px) translateX(1px); }

/* ===================== Hero ===================== */
.hero { padding: 76px 0 84px; position: relative; overflow: hidden; }
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(58% 55% at 88% 10%, rgba(194,115,78,.16), transparent 70%),
    radial-gradient(48% 50% at 4% 92%, rgba(184,137,44,.18), transparent 70%);
}
.hero__grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(40px, 6.4vw, 68px); line-height: 1.04; margin-bottom: 22px; }
.hero h1 em { font-style: italic; color: var(--lav-deep); }
.hero__sub { font-size: clamp(17px, 2vw, 20px); color: var(--ink-mid); max-width: 30em; margin-bottom: 32px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__trust { margin-top: 30px; display: flex; flex-wrap: wrap; gap: 10px 22px; font-family: var(--label); font-size: 13px; font-weight: 500; letter-spacing: .02em; color: var(--ink-light); }
.hero__trust span { display: inline-flex; align-items: center; gap: 7px; }
.hero__trust span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--mint); }

/* Hero device — phone frame holding a live module preview */
.device {
  justify-self: center;
  width: 100%; max-width: 320px;
  background: #11141b;
  border-radius: 36px; padding: 12px;
  box-shadow: var(--shadow-lg);
}
.device__screen { background: var(--paper); border-radius: 26px; overflow: hidden; }
.device__bar { background: #1a1e29; color: #E8DFCF; font-family: var(--label); font-size: 11px; font-weight: 500; padding: 9px 18px; display: flex; justify-content: space-between; align-items: center; }
.device__live { display: inline-flex; align-items: center; gap: 7px; color: #E8DFCF; }
.device__live i { width: 6px; height: 6px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 3px rgba(63,92,73,.30); }

/* Live preview viewport */
.device__viewport { position: relative; aspect-ratio: 300 / 560; background: var(--paper); }
.device__fallback { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: top center; }
.device__frame { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; background: var(--paper); opacity: 0; transition: opacity .45s ease; }
.device--live.frame-loaded .device__frame { opacity: 1; }
.device--live.frame-failed .device__frame { display: none; }   /* reveal the static fallback */
.device__open { display: block; text-align: center; margin-top: 14px; font-family: var(--label); font-size: 13px; font-weight: 600; color: var(--lav-deep); }
.device__open:hover { color: var(--ink); }
@media (prefers-reduced-motion: reduce) { .device__frame { transition: none; } }

/* ===================== Problem ===================== */
.problem .lead { max-width: 40em; }
.problem .lead strong { color: var(--ink); font-weight: 600; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 52px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px; box-shadow: var(--shadow-sm); }
.stat__num { font-family: var(--serif); font-size: clamp(34px, 5vw, 46px); font-weight: 600; color: var(--lav-deep); line-height: 1; letter-spacing: -.02em; }
.stat__label { font-family: var(--label); font-size: 11.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-light); margin: 12px 0 8px; }
.stat__desc { font-size: 14.5px; color: var(--ink-mid); line-height: 1.5; }
.stat__src { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); font-family: var(--label); font-size: 11px; font-style: italic; line-height: 1.4; color: var(--ink-faint); }

/* ===================== Approach ===================== */
.approach-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.appr-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); transition: transform .18s ease, box-shadow .18s ease; }
.appr-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.appr-card__icon { width: 50px; height: 50px; border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.appr-card__icon svg { width: 26px; height: 26px; }
.appr-card h3 { margin-bottom: 8px; }
.appr-card p { color: var(--ink-mid); font-size: 15.5px; }
.i-lav   { background: var(--lav-soft);  color: var(--lav-deep); }
.i-mint  { background: var(--mint-tint); color: var(--mint-deep); }
.i-amber { background: var(--amber-tint);color: var(--amber-deep); }
.i-rose  { background: var(--rose-tint); color: var(--ink); }

/* ===================== Demos ===================== */
.demo-group { margin-bottom: 38px; }
.demo-group:last-child { margin-bottom: 0; }
.demo-group__label { font-family: var(--label); font-size: 12.5px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--lav-deep); display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.demo-group__label::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.demo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.demo-card {
  display: flex; flex-direction: column; gap: 6px;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 22px 22px 20px; color: var(--ink);
  position: relative; transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}
.demo-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--lav); }
.demo-card__title { font-family: var(--serif); font-size: 19px; font-weight: 600; padding-right: 26px; }
.demo-card__desc { font-size: 14.5px; color: var(--ink-mid); line-height: 1.5; }
.demo-card__arrow { position: absolute; top: 22px; right: 22px; color: var(--lav-deep); font-size: 18px; transition: transform .16s ease; }
.demo-card:hover .demo-card__arrow { transform: translate(2px, -2px); }
.demo-card__ext { margin-top: 6px; font-family: var(--label); font-size: 11px; font-weight: 500; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-faint); }

/* ===================== Team ===================== */
.founder-story { max-width: 880px; margin: 0 0 52px; padding: 6px 0 6px 28px; border-left: 3px solid var(--lav); }
.founder-story__quote { font-family: var(--serif); font-size: clamp(25px, 3.4vw, 38px); line-height: 1.22; font-weight: 600; letter-spacing: -.01em; color: var(--ink); margin: 0 0 18px; text-wrap: balance; }
.founder-story__note { font-size: clamp(15px, 1.7vw, 17px); line-height: 1.6; color: var(--ink-mid); margin: 0; max-width: 62ch; }
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.member { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); }
.avatar {
  position: relative; width: 84px; height: 84px; border-radius: 50%;
  background: var(--lav-soft); color: var(--lav-deep);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  font-family: var(--serif); font-size: 28px; font-weight: 600; margin-bottom: 20px;
}
.avatar::after { content: attr(data-initials); }
.avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.member h3 { font-size: 20px; margin-bottom: 2px; }
.member__role { font-family: var(--label); font-size: 11.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--lav-deep); margin-bottom: 14px; }
.member__bio { font-size: 14.5px; color: var(--ink-mid); line-height: 1.55; }

/* ===================== Contact ===================== */
.contact { text-align: center; }
.contact__inner { max-width: 760px; margin: 0 auto; }
.contact h2 { font-size: clamp(30px, 4.6vw, 48px); margin-bottom: 24px; }
.contact h2 em { font-style: italic; color: var(--lav-deep); }
.contact__email { display: inline-block; font-family: var(--serif); font-size: clamp(22px, 3.4vw, 32px); color: var(--ink); margin-bottom: 26px; border-bottom: 2px solid var(--line); padding-bottom: 4px; transition: border-color .15s, color .15s; }
.contact__email:hover { color: var(--lav-deep); border-color: var(--lav); }
.contact__row { display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: center; align-items: center; }
.contact__phone { font-family: var(--label); font-size: 15px; font-weight: 500; color: var(--ink-mid); }

/* ===================== Footer ===================== */
.site-footer { background: var(--paper-2); border-top: 1px solid var(--line); padding: 48px 0 40px; }
.footer__top { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; align-items: flex-start; }
.footer__links { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.footer__links a { color: var(--ink-mid); font-size: 14px; }
.footer__links a:hover { color: var(--ink); }
.footer__tag { font-size: 14px; color: var(--ink-light); max-width: 30em; margin-top: 10px; }
.footer__bottom { margin-top: 30px; padding-top: 22px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: space-between; align-items: center; }
.footer__bottom p { font-family: var(--label); font-size: 12px; letter-spacing: .02em; color: var(--ink-light); }
.footer__phi { display: inline-flex; align-items: center; gap: 8px; }
.footer__phi::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--mint); }

/* ===================== Responsive ===================== */
@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; gap: 44px; }
  .device { transform: rotate(0); order: -1; max-width: 290px; }
  .stats { grid-template-columns: 1fr; }
  .approach-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; gap: 20px; }
}
@media (max-width: 760px) {
  .section { padding: 68px 0; }
  .nav__toggle { display: inline-flex; }
  .nav__links {
    position: absolute; top: 70px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 14px 20px 22px; box-shadow: var(--shadow-md);
    display: none;
  }
  .nav__links[data-open="true"] { display: flex; }
  .nav__links a { padding: 13px 12px; font-size: 16px; }
  .nav__links .btn { margin: 8px 0 0; justify-content: center; }
  .hero { padding: 48px 0 60px; }
}