/* Shatavi marketing site, shared styles
   Brand palette pulled from the app's own design assets: warm orange,
   gold accent, ink text, cream/linen backgrounds. */

:root {
  --cream: #f4f1ec;
  --linen: #fbf0e2;
  --paper: #fffdf9;
  --ink: #191a1a;
  --ink-soft: #5b5551;
  --orange: #f15a24;
  --orange-deep: #c94915;
  --gold: #d9a441;
  --border: #e9e0d2;

  --font-serif: Georgia, "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --max-width: 1120px;
  --radius: 14px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.125rem; /* 18px base, this audience often reads at larger sizes */
  line-height: 1.6;
  color: var(--ink);
  background: var(--cream);
}

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

a { color: var(--orange-deep); }
a:hover { color: var(--ink); }

h1, h2, h3 {
  font-family: var(--font-serif);
  line-height: 1.2;
  margin: 0 0 0.6em;
  color: var(--ink);
}

h1 { font-size: clamp(2.1rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); }
h3 { font-size: 1.35rem; }

p { margin: 0 0 1.1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--cream);
  padding: 0.75rem 1.25rem;
  z-index: 100;
  border-radius: 0 0 8px 0;
}
.skip-link:focus {
  left: 0;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 241, 236, 0.92);
  backdrop-filter: saturate(160%) blur(6px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-family: var(--font-serif);
  font-weight: bold;
  font-size: 1.5rem;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.logo:hover { color: var(--orange-deep); }

.logo-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}
.logo-mark img { width: 100%; height: 100%; display: block; }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 1rem;
}
.nav-links a:hover { color: var(--orange-deep); }

a.nav-cta {
  display: none;
}

/* mobile nav via checkbox hack */
.nav-toggle-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  cursor: pointer;
}
.nav-toggle-label span {
  display: block;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}
#nav-toggle { display: none; }

.nav-links {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--paper);
  flex-direction: column;
  gap: 0;
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
  border-bottom: 1px solid var(--border);
}
.nav-links li { border-top: 1px solid var(--border); }
.nav-links a { display: block; padding: 1rem 1.5rem; }

#nav-toggle:checked ~ .nav-links {
  max-height: 320px;
}

@media (min-width: 800px) {
  .nav-toggle-label { display: none; }
  .nav-links {
    position: static;
    flex-direction: row;
    gap: 2rem;
    max-height: none;
    background: none;
    border: none;
    overflow: visible;
  }
  .nav-links li { border: none; }
  .nav-links a { padding: 0; }
  a.nav-cta { display: inline-flex; }
}

/* ---------- Buttons / Store badges ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
  font-size: 1rem;
  border: 2px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background: var(--orange);
  color: var(--paper);
}
.btn-primary:hover {
  background: var(--orange-deep);
  color: var(--paper);
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}
.btn-secondary:hover {
  background: var(--ink);
  color: var(--cream);
}

.store-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--ink);
  color: var(--cream);
  padding: 0.7rem 1.3rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.2;
  min-width: 190px;
}
.store-badge:hover { background: #33302d; color: var(--cream); }
.store-badge svg { flex-shrink: 0; }
.store-badge .badge-text small {
  display: block;
  font-weight: 400;
  font-size: 0.72rem;
  opacity: 0.85;
}

/* ---------- Sections ---------- */

section {
  padding: 4.5rem 0;
}

.section-alt {
  background: var(--linen);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--orange-deep);
  margin-bottom: 0.75rem;
  display: block;
}

.hero {
  padding: 4rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.hero-copy p.lede {
  font-size: 1.25rem;
  color: var(--ink-soft);
  max-width: 46ch;
}

.hero-photo {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-cta {
  margin-top: 1.75rem;
}

.hero-note {
  margin-top: 1rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

/* Promise cards */
.promise-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .promise-grid { grid-template-columns: repeat(3, 1fr); }
}

.promise-card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
}

.promise-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: #fce4d6;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.promise-card p { color: var(--ink-soft); margin-bottom: 0; }

/* Credibility split (photo + text) */
.split {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .split { grid-template-columns: 1fr 1fr; }
  .split.reverse .split-photo { order: 2; }
}

.split-photo {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.split-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.split-copy p { color: var(--ink-soft); }

/* How it works */
.steps {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  counter-reset: step;
}

@media (min-width: 760px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
}

.step {
  position: relative;
  padding-top: 0.5rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--orange);
  color: var(--paper);
  font-family: var(--font-serif);
  font-weight: bold;
  margin-bottom: 1rem;
}

.step p { color: var(--ink-soft); font-size: 1rem; margin-bottom: 0; }

/* Testimonials */
.testimonial-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: 1fr;
}

@media (min-width: 760px) {
  .testimonial-grid { grid-template-columns: repeat(3, 1fr); }
}

.testimonial-card {
  background: var(--paper);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  position: relative;
}

.testimonial-badge {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--orange-deep);
  background: #fce4d6;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.testimonial-card blockquote {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--ink);
}

.testimonial-card cite {
  font-style: normal;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* Final CTA */
.cta-band {
  position: relative;
  color: var(--paper);
  text-align: center;
  background: var(--ink);
  overflow: hidden;
}
.cta-band .bg-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(25,26,26,0.78), rgba(25,26,26,0.88));
}
.cta-band .container { position: relative; z-index: 1; }
.cta-band h2 { color: var(--paper); }
.cta-band p { color: #ece7e1; max-width: 52ch; margin-left: auto; margin-right: auto; }
.cta-band .store-badges { justify-content: center; margin-top: 1.75rem; }
.cta-band .store-badge { background: var(--paper); color: var(--ink); }
.cta-band .store-badge:hover { background: var(--linen); }

/* ---------- Content pages (privacy/terms/science) ---------- */

.page-header {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--paper);
}

.page-header p.lede {
  color: var(--ink-soft);
  font-size: 1.15rem;
  max-width: 60ch;
}

.page-hero-photo {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 21 / 9;
  margin: 0 auto 0;
  max-width: var(--max-width);
}
.page-hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.prose {
  max-width: 72ch;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.prose h2 { margin-top: 2em; }
.prose h2:first-child { margin-top: 0; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin-bottom: 0.5em; }

.callout {
  background: var(--paper);
  border-left: 4px solid var(--gold);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  color: var(--ink-soft);
}

.callout strong { color: var(--ink); }

.updated-date {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

/* Contact page */
.contact-card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.contact-email {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  display: inline-block;
  margin: 1rem 0 1.5rem;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--ink);
  color: #cfc9c3;
  padding: 3rem 0 2rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1fr;
  margin-bottom: 2rem;
}

@media (min-width: 700px) {
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
}

.footer-brand .logo { color: var(--cream); }
.footer-brand p { color: #b0aaa3; max-width: 40ch; }

.footer-heading {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.8rem;
  font-weight: 700;
  color: #b0aaa3;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links li { margin-bottom: 0.6rem; }
.footer-links a {
  color: #e4dfd8;
  text-decoration: none;
}
.footer-links a:hover { color: var(--orange); }

.footer-bottom {
  border-top: 1px solid #3a3734;
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  color: #a39d96;
}

.footer-bottom .store-badges { gap: 0.6rem; }
.footer-bottom .store-badge {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
  min-width: 0;
}

/* Focus visibility for keyboard users */
a:focus-visible, button:focus-visible, .nav-toggle-label:focus-visible {
  outline: 3px solid var(--orange-deep);
  outline-offset: 2px;
}