/* =========================================================================
   Hiyd — design system
   Fresh / modern / minimal. Light + dark via prefers-color-scheme.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg:          #fbfbf9;
  --bg-sunk:     #f2f3ef;
  --panel:       #ffffff;
  --ink:         #10130f;
  --ink-soft:    #4b5145;
  --ink-faint:   #6f766a;
  --line:        #e5e6df;
  --line-strong: #d3d5c9;
  --accent:      #12924a;
  --accent-ink:  #0c6c37;
  --accent-wash: #e7f4ec;
  --focus:       #12924a;
  --radius:      14px;
  --radius-lg:   22px;
  --shadow-sm:   0 1px 2px rgba(16, 19, 15, .06), 0 1px 3px rgba(16, 19, 15, .04);
  --shadow-md:   0 14px 40px rgba(16, 19, 15, .10);
  --maxw:        1080px;
  --font-sans:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono:   'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:          #0d0f0c;
    --bg-sunk:     #131611;
    --panel:       #171a15;
    --ink:         #f3f5ef;
    --ink-soft:    #b9c0b0;
    --ink-faint:   #878e7d;
    --line:        #262a22;
    --line-strong: #363b30;
    --accent:      #3fd07f;
    --accent-ink:  #7ee3a8;
    --accent-wash: #16241b;
    --focus:       #3fd07f;
    --shadow-sm:   0 1px 2px rgba(0, 0, 0, .4);
    --shadow-md:   0 18px 50px rgba(0, 0, 0, .5);
  }
}

/* --- reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 90px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: var(--accent); color: #fff; }

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

h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
h1 { font-size: clamp(2.3rem, 6vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); }
h3 { font-size: 1.18rem; letter-spacing: -0.01em; }

code, kbd, pre, samp { font-family: var(--font-mono); font-size: .9em; }
:not(pre) > code {
  background: var(--bg-sunk);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .1em .4em;
}
kbd {
  background: var(--panel);
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 6px;
  padding: .1em .45em;
  font-size: .82em;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* --- layout primitives ------------------------------------------------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: 22px; }
.section { padding-block: clamp(56px, 9vw, 104px); }
.section--sunk { background: var(--bg-sunk); border-block: 1px solid var(--line); }
.eyebrow {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-ink);
  margin-bottom: 14px;
}
.section-lead { max-width: 46ch; color: var(--ink-soft); font-size: 1.06rem; margin-top: 14px; }

/* --- buttons --------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: inherit;
  font-weight: 600;
  border-radius: 999px;
  padding: 13px 22px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn--primary { background: var(--accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { box-shadow: var(--shadow-md); }
.btn--ghost { background: var(--panel); color: var(--ink); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--ink-faint); }
.btn--sm { padding: 9px 16px; font-size: .92rem; }

.store-badges { display: flex; flex-wrap: wrap; gap: 14px; }
.store-badge {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  min-width: 190px;
  padding: 11px 20px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: var(--panel);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform .12s ease, box-shadow .12s ease;
}
.store-badge:hover { text-decoration: none; transform: translateY(-2px); box-shadow: var(--shadow-md); }
.store-badge .small { font-size: .72rem; color: var(--ink-faint); letter-spacing: .02em; }
.store-badge .large { font-size: 1.12rem; font-weight: 700; letter-spacing: -0.01em; }

/* --- header --------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 64px;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 22px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.site-nav a { color: var(--ink-soft); font-weight: 500; font-size: .96rem; }
.site-nav a:hover { color: var(--ink); text-decoration: none; }
.nav-toggle { display: none; }

@media (max-width: 720px) {
  .site-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 8px 22px 18px;
    transform: translateY(-140%);
    transition: transform .22s ease;
  }
  .site-nav a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-toggle:checked ~ .site-nav { transform: translateY(0); }
  .nav-toggle-label {
    display: inline-flex;
    margin-left: auto;
    width: 40px; height: 40px;
    align-items: center; justify-content: center;
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    cursor: pointer;
  }
  .nav-toggle-label span, .nav-toggle-label span::before, .nav-toggle-label span::after {
    content: "";
    display: block;
    width: 17px; height: 2px;
    background: var(--ink);
    position: relative;
  }
  .nav-toggle-label span::before { position: absolute; top: -6px; }
  .nav-toggle-label span::after  { position: absolute; top: 6px; }
}

/* --- hero ---------------------------------------------------------- */
.hero { padding-block: clamp(48px, 8vw, 96px); overflow: hidden; }
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
}
.hero h1 { margin-bottom: 20px; }
.hero p.lede { font-size: 1.2rem; color: var(--ink-soft); max-width: 52ch; }
.hero .store-badges { margin-top: 30px; }
.hero__meta { margin-top: 18px; font-size: .9rem; color: var(--ink-faint); }
.hero__media { position: relative; display: flex; justify-content: center; }
.hero__media img {
  width: min(300px, 78vw);
  border-radius: 38px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}
.hero__media::after {
  content: "";
  position: absolute;
  inset: auto -20% -30% -20%;
  height: 60%;
  background: radial-gradient(50% 50% at 50% 50%, var(--accent-wash), transparent 70%);
  z-index: -1;
}
@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; text-align: center; }
  .hero p.lede { margin-inline: auto; }
  .hero .store-badges { justify-content: center; }
  .hero__media { order: -1; }
}

/* --- code sample chip ------------------------------------------------ */
.frontmatter-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  text-align: left;
}
.frontmatter-card__bar {
  display: flex; gap: 6px; align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-sunk);
}
.frontmatter-card__bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-strong); display: block; }
.frontmatter-card__bar span { margin-left: 8px; font-family: var(--font-mono); font-size: .74rem; color: var(--ink-faint); }
.frontmatter-card pre { padding: 16px 18px; overflow-x: auto; font-size: .86rem; line-height: 1.7; color: var(--ink-soft); }
.frontmatter-card pre b { color: var(--accent-ink); font-weight: 500; }

/* --- steps -------------------------------------------------------- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; counter-reset: step; }
.step {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--accent-wash);
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-weight: 600;
  margin-bottom: 14px;
}
.step h3 { margin-bottom: 6px; }
.step p { font-size: .96rem; color: var(--ink-soft); }
@media (max-width: 780px) { .steps { grid-template-columns: 1fr; } }

/* --- feature grid ------------------------------------------------ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
  gap: 20px;
  margin-top: 44px;
}
.feature {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.feature__icon {
  width: 38px; height: 38px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 10px;
  background: var(--accent-wash);
  color: var(--accent-ink);
  margin-bottom: 14px;
}
.feature__icon svg { width: 20px; height: 20px; }
.feature h3 { margin-bottom: 6px; }
.feature p { font-size: .95rem; color: var(--ink-soft); }

/* --- split highlight ------------------------------------------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 6vw, 64px);
  align-items: center;
}
.split__body ul { list-style: none; margin-top: 20px; display: grid; gap: 12px; }
.split__body li { position: relative; padding-left: 28px; color: var(--ink-soft); }
.split__body li::before {
  content: "";
  position: absolute; left: 0; top: .55em;
  width: 14px; height: 8px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}
@media (max-width: 820px) { .split { grid-template-columns: 1fr; } }

/* --- FAQ ------------------------------------------------------ */
.faq { margin-top: 40px; display: grid; gap: 12px; max-width: 780px; }
.faq details {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 20px;
  box-shadow: var(--shadow-sm);
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 28px 16px 0;
  font-weight: 600;
  position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute; right: 0; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--ink-faint);
}
.faq details[open] summary::after { content: "\2013"; }
.faq details > div { padding: 0 0 18px; color: var(--ink-soft); }
.faq details > div :last-child { margin-bottom: 0; }

/* --- CTA band ----------------------------------------------- */
.cta-band { text-align: center; }
.cta-band h2 { max-width: 20ch; margin-inline: auto; }
.cta-band .store-badges { justify-content: center; margin-top: 30px; }

/* --- prose (legal + guides) ------------------------------- */
.prose-page { padding-block: clamp(44px, 7vw, 80px); }
.prose { max-width: 720px; }
.prose > * + * { margin-top: 1.1em; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: .4em; }
.prose li { color: var(--ink-soft); }
.prose a { text-decoration: underline; text-underline-offset: 2px; }
.prose blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  color: var(--ink-soft);
}
.prose pre {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
}
.prose table { border-collapse: collapse; width: 100%; font-size: .94rem; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 8px 12px; text-align: left; }
.prose th { background: var(--bg-sunk); }
.page-head { max-width: 720px; margin-bottom: 8px; }
.page-head .eyebrow { margin-bottom: 10px; }
.page-head p { color: var(--ink-soft); margin-top: 10px; }
.last-updated { font-size: .85rem; color: var(--ink-faint); font-family: var(--font-mono); }

/* --- guide extras ------------------------------------------ */
.breadcrumb { font-size: .85rem; color: var(--ink-faint); margin-bottom: 20px; }
.breadcrumb a { color: var(--ink-faint); }
.guide-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin-top: 36px; }
.guide-card {
  display: block;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  color: var(--ink);
}
.guide-card:hover { text-decoration: none; border-color: var(--ink-faint); transform: translateY(-2px); transition: transform .12s ease; }
.guide-card h3 { margin-bottom: 6px; }
.guide-card p { font-size: .93rem; color: var(--ink-soft); }
.guide-card .arrow { color: var(--accent-ink); font-family: var(--font-mono); margin-top: 12px; display: inline-block; }
.callout {
  background: var(--accent-wash);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  border-radius: var(--radius);
  padding: 16px 18px;
  font-size: .95rem;
}
.callout strong { color: var(--accent-ink); }

/* --- footer ---------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-sunk);
  padding-block: 48px;
  font-size: .92rem;
}
.site-footer__grid { display: flex; flex-wrap: wrap; gap: 32px 64px; justify-content: space-between; }
.site-footer h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-faint); margin-bottom: 12px; }
.site-footer ul { list-style: none; display: grid; gap: 8px; }
.site-footer a { color: var(--ink-soft); }
.site-footer a:hover { color: var(--ink); }
.site-footer__brand { max-width: 260px; }
.site-footer__brand p { color: var(--ink-faint); margin-top: 10px; font-size: .88rem; }
.site-footer__legal { margin-top: 36px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--ink-faint); font-size: .85rem; display: flex; flex-wrap: wrap; gap: 8px 20px; justify-content: space-between; }