/* ClearLung landing site — palette derived from app icon:
   vermillion #F1552E, deep forest green #2C4A42, cream #FAF2E7 */

:root {
  --orange: #f1552e;
  --orange-deep: #b4380f;
  --green: #2c4a42;
  --green-deep: #21382f;
  --cream: #faf2e7;
  --cream-soft: #f3e7d6;
  --ink: #22352f;
  --ink-soft: #4c5f58;
  --card: #ffffff;
  --line: #e3d5c2;
  --focus: #b4380f;
  --shadow: 0 2px 12px rgba(44, 74, 66, 0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --orange: #ff7a50;
    --orange-deep: #ffa287;
    --green: #cfe3db;
    --green-deep: #101c18;
    --cream: #14201c;
    --cream-soft: #1b2a25;
    --ink: #f0e8da;
    --ink-soft: #b8c4be;
    --card: #1e2f29;
    --line: #33473f;
    --focus: #ff9d76;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.65;
  font-size: 1.0625rem;
}

img { max-width: 100%; height: auto; }

a { color: var(--orange-deep); }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--green);
  color: var(--cream);
  padding: 0.6rem 1rem;
  z-index: 100;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

.wrap {
  max-width: 68rem;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header / nav ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--cream);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.15rem;
}
.brand img { border-radius: 22%; }
.nav-toggle {
  display: none;
  background: none;
  border: 2px solid var(--green);
  color: var(--ink);
  border-radius: 8px;
  padding: 0.35rem 0.7rem;
  font-size: 1rem;
  cursor: pointer;
}
.nav-links {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
}
.nav-links a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
}
.nav-links a:hover { color: var(--orange-deep); text-decoration: underline; }
.nav-cta {
  background: var(--green);
  color: var(--cream) !important;
  padding: 0.45rem 0.95rem;
  border-radius: 999px;
  font-weight: 600;
}
.nav-cta:hover { background: var(--green-deep); text-decoration: none !important; }
@media (prefers-color-scheme: dark) {
  .nav-cta { background: var(--orange); color: #241109 !important; }
  .nav-cta:hover { background: var(--orange-deep); }
}

@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 1.25rem 1.25rem;
    gap: 0.9rem;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
}

/* ---------- Hero ---------- */
.hero {
  padding: 3.5rem 0 3rem;
  background:
    radial-gradient(ellipse 60rem 30rem at 85% -10%, rgba(241, 85, 46, 0.12), transparent 60%),
    var(--cream);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
}
.eyebrow {
  display: inline-block;
  color: var(--orange-deep);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.12;
  margin: 0 0 1rem;
  color: var(--green);
  letter-spacing: -0.02em;
}
@media (prefers-color-scheme: dark) { h1 { color: var(--ink); } }
.hero p.lede {
  font-size: 1.2rem;
  color: var(--ink-soft);
  margin: 0 0 1.75rem;
  max-width: 34em;
}
.store-badges { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; }
.badge-appstore {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--green);
  color: var(--cream);
  text-decoration: none;
  padding: 0.7rem 1.3rem;
  border-radius: 12px;
  line-height: 1.2;
}
.badge-appstore:hover { background: var(--green-deep); }
.badge-appstore .small { display: block; font-size: 0.7rem; opacity: 0.9; }
.badge-appstore .big { display: block; font-size: 1.15rem; font-weight: 700; }
@media (prefers-color-scheme: dark) {
  .badge-appstore { background: var(--orange); color: #241109; }
  .badge-appstore:hover { background: var(--orange-deep); }
}
.free-note { font-size: 0.9rem; color: var(--ink-soft); }

/* Hero mock card (no App Store screenshots available) */
.hero-mock {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
  max-width: 22rem;
  margin: 0 auto;
}
.hero-mock .mock-head { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 1.1rem; }
.hero-mock .mock-head img { border-radius: 22%; }
.hero-mock .mock-head strong { display: block; color: var(--ink); }
.hero-mock .mock-head span { font-size: 0.85rem; color: var(--ink-soft); }
.mock-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.mock-stat {
  background: var(--cream-soft);
  border-radius: 12px;
  padding: 0.8rem;
}
.mock-stat b { display: block; font-size: 1.3rem; color: var(--orange-deep); }
.mock-stat span { font-size: 0.8rem; color: var(--ink-soft); }
.mock-note { font-size: 0.78rem; color: var(--ink-soft); text-align: center; margin: 1rem 0 0; }

/* ---------- Sections ---------- */
section { padding: 3.5rem 0; }
section.alt { background: var(--cream-soft); }
h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.1rem);
  color: var(--green);
  margin: 0 0 0.5rem;
  letter-spacing: -0.01em;
}
@media (prefers-color-scheme: dark) { h2 { color: var(--ink); } }
.section-intro { color: var(--ink-soft); max-width: 44em; margin: 0 0 2rem; }

.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
@media (max-width: 760px) { .cols-2 { grid-template-columns: 1fr; } }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.25rem;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.4rem;
}
.card h3 { margin: 0 0 0.5rem; font-size: 1.1rem; color: var(--ink); }
.card p { margin: 0; color: var(--ink-soft); font-size: 0.97rem; }
.card .tick {
  display: inline-flex;
  width: 2.1rem; height: 2.1rem;
  border-radius: 10px;
  background: rgba(241, 85, 46, 0.14);
  color: var(--orange-deep);
  align-items: center;
  justify-content: center;
  font-weight: 800;
  margin-bottom: 0.75rem;
  font-size: 1.05rem;
}

.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li {
  padding-left: 1.9rem;
  position: relative;
  margin-bottom: 0.85rem;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--orange-deep);
  font-weight: 800;
}

.pill-list { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; padding: 0; margin: 1rem 0 0; }
.pill-list li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

/* ---------- FAQ accordion ---------- */
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  background: none;
  border: none;
  text-align: left;
  font: inherit;
  font-weight: 600;
  color: var(--ink);
  padding: 1.1rem 2.5rem 1.1rem 0;
  cursor: pointer;
  position: relative;
  font-size: 1.05rem;
}
.faq-q::after {
  content: "+";
  position: absolute;
  right: 0.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  color: var(--orange-deep);
  font-weight: 400;
}
.faq-q[aria-expanded="true"]::after { content: "–"; }
.faq-a { padding: 0 0 1.2rem; color: var(--ink-soft); max-width: 46em; }
.faq-a[hidden] { display: none; }
.faq-a p { margin-top: 0; }

/* ---------- Guides teaser / footer ---------- */
.guide-card { text-decoration: none; display: block; transition: transform 0.15s ease; }
.guide-card:hover { transform: translateY(-3px); }
.guide-card h3 { color: var(--orange-deep); }
.guide-card .more { font-size: 0.9rem; font-weight: 600; color: var(--orange-deep); display: inline-block; margin-top: 0.75rem; }

.site-footer {
  background: var(--green);
  color: var(--cream);
  padding: 3rem 0 2rem;
  margin-top: 2rem;
}
@media (prefers-color-scheme: dark) { .site-footer { background: var(--green-deep); } }
.site-footer a { color: var(--cream); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h3 { font-size: 0.9rem; text-transform: uppercase; letter-spacing: 0.07em; opacity: 0.85; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.55rem; }
.footer-note { border-top: 1px solid rgba(250, 242, 231, 0.25); margin-top: 2rem; padding-top: 1.25rem; font-size: 0.85rem; opacity: 0.85; }

/* ---------- Guide article pages ---------- */
.breadcrumb { font-size: 0.9rem; margin: 1.5rem 0 0; }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.35rem; padding: 0; margin: 0; color: var(--ink-soft); }
.breadcrumb li + li::before { content: "›"; margin-right: 0.35rem; }
article.guide { max-width: 44rem; margin: 0 auto; padding: 2rem 0 3.5rem; }
article.guide h1 { font-size: clamp(1.8rem, 4.5vw, 2.5rem); }
article.guide h2 { font-size: 1.45rem; margin-top: 2.4rem; }
article.guide h3 { color: var(--ink); margin-top: 1.8rem; }
article.guide .meta { color: var(--ink-soft); font-size: 0.9rem; margin-bottom: 2rem; }
article.guide ul, article.guide ol { padding-left: 1.4rem; }
article.guide li { margin-bottom: 0.5rem; }
.callout {
  background: var(--cream-soft);
  border-left: 4px solid var(--orange);
  border-radius: 0 12px 12px 0;
  padding: 1.1rem 1.3rem;
  margin: 1.75rem 0;
}
.callout p:first-child { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }
.app-cta-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.6rem;
  margin: 2.5rem 0;
  box-shadow: var(--shadow);
}
.app-cta-box h2 { margin-top: 0; }
.related { border-top: 1px solid var(--line); margin-top: 2.5rem; padding-top: 1.5rem; }
.related h2 { font-size: 1.2rem; }

table { border-collapse: collapse; width: 100%; margin: 1.5rem 0; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 0.6rem 0.8rem; text-align: left; vertical-align: top; }
th { background: var(--cream-soft); color: var(--ink); }
.table-scroll { overflow-x: auto; }