:root {
  --white: #ffffff;
  --wash: #eaf0ff;
  --wash-2: #d7e2ff;
  --blue: #194fff;
  --blue-deep: #0c2c99;
  --blue-line: rgba(25,79,255,.2);
  --blue-soft: #5b78e0;

  /* shared spacing tokens */
  --gap-x: clamp(24px, 5vw, 72px);
  --gap-section: clamp(60px, 10vh, 110px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-padding-top: env(safe-area-inset-top, 0px); }
body {
  background: var(--white);
  color: var(--blue-deep);
  font-family: 'Manrope', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
a { color: var(--blue); text-decoration: none; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* shared container — same left/right edge for every section */
.inner {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: var(--gap-x);
  padding-right: var(--gap-x);
}

/* ── nav ────────────────────────────────────────────── */
nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--blue-line);
  padding-top: env(safe-area-inset-top, 0px);
}
nav .inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 20px; padding-bottom: 20px;
  font-size: .88rem; letter-spacing: .03em;
}
.word { font-weight: 800; font-size: 1.05rem; }
.navlinks { display: flex; gap: clamp(16px, 3vw, 30px); }
.navlinks a { color: var(--blue-soft); border-bottom: 1px solid transparent; padding-bottom: 2px; }
.navlinks a:hover,
.navlinks a:focus-visible { color: var(--blue); border-color: var(--blue); }

/* ── hero ───────────────────────────────────────────── */
header.hero {
  min-height: calc(100dvh - 61px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding-top: var(--gap-section);
  padding-bottom: var(--gap-section);
}
header.hero .inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
  gap: clamp(32px, 6vh, 64px);
}

.mark {
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  letter-spacing: -.01em;
  color: var(--blue);
  margin: 0;
}
h1.lede {
  font-weight: 800;
  font-size: clamp(3rem, 9vw, 7.5rem);
  line-height: .94;
  letter-spacing: -.03em;
  margin: 0;
  color: var(--blue);
}
.subline {
  border-top: 1px solid var(--blue-line);
  padding-top: 12px;
  font-size: clamp(.95rem, 1.5vw, 1.25rem);
  color: var(--blue-soft);
  margin: 0;
}
.hero-body {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.hero-foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: clamp(24px, 4vw, 48px);
}
.ctas { display: flex; gap: clamp(18px, 3vw, 30px); font-size: 1rem; }
.ctas a { border-bottom: 1px solid var(--blue-line); padding-bottom: 2px; }
.ctas a:hover { border-color: var(--blue); }
.sub-p {
  color: var(--blue-soft);
  font-size: .95rem;
  max-width: 38ch;
  text-align: right;
  margin: 0;
}

/* ── sections ───────────────────────────────────────── */
section {
  padding-top: var(--gap-section);
  padding-bottom: var(--gap-section);
}
section.wash { background: var(--wash); }
h2.h {
  font-size: .78rem; letter-spacing: .06em; text-transform: uppercase;
  color: var(--blue-soft); font-weight: 700;
  margin: 0 0 clamp(28px, 4vw, 44px);
}

/* trio: 3 equal columns */
.trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 4vw, 40px);
}
.trio a {
  display: block; padding-top: 18px;
  border-top: 1px solid var(--blue-line);
  font-size: clamp(1.05rem, 1.8vw, 1.45rem);
  font-weight: 700; color: var(--blue-deep);
}
.trio a .arrow { color: var(--blue); font-weight: 400; margin-right: 8px; }
.trio a:hover { color: var(--blue); }
.trio p { margin: 10px 0 0; font-size: .9rem; font-weight: 400; color: var(--blue-soft); }

/* ── footer ─────────────────────────────────────────── */
footer {
  padding-top: var(--gap-section);
  padding-bottom: var(--gap-section);
  background: var(--white);
}
.to-top { display: inline-block; margin-bottom: clamp(24px, 4vh, 40px); font-size: 1.2rem; }
.frow-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 5vw, 50px);
  margin-bottom: clamp(32px, 5vh, 50px);
}
.frow-col { min-width: 0; }
.frow { padding: 4px 0; font-size: .95rem; }
.frow .k { display: block; color: var(--blue-soft); font-weight: 700; font-size: .78rem; letter-spacing: .04em; margin-bottom: 4px; }
.frow a { border-bottom: 1px solid var(--blue-line); }
.frow a:hover { border-color: var(--blue); }
.copyright { font-size: .8rem; color: var(--blue-soft); border-top: 1px solid var(--blue-line); padding-top: 18px; margin: 0; }

/* ── how-to-use steps ───────────────────────────────── */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 4vw, 36px);
}
.step {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: clamp(16px, 2.5vw, 28px);
  align-items: start;
}
.step-num {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--blue-line);
  line-height: 1;
  padding-top: 3px;
  letter-spacing: -.02em;
}
.step-body { border-top: 1px solid var(--blue-line); padding-top: 14px; }
.step-title {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 700;
  color: var(--blue-deep);
  margin: 0 0 10px;
}
.step-note {
  font-size: .88rem;
  color: var(--blue-soft);
  font-weight: 400;
  margin: 8px 0 0;
}
pre.cmd {
  margin: 0;
  background: var(--wash);
  border: 1px solid var(--blue-line);
  border-radius: 6px;
  padding: 12px 16px;
  overflow-x: auto;
}
pre.cmd code {
  font-family: 'Menlo', 'Consolas', 'Monaco', monospace;
  font-size: .85rem;
  color: var(--blue-deep);
  white-space: pre;
}
.step-body .step-note code {
  font-family: 'Menlo', 'Consolas', 'Monaco', monospace;
  font-size: .83rem;
  background: var(--wash);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--blue);
}

/* ── responsive ─────────────────────────────────────── */
@media (max-width: 900px) {
  .trio { grid-template-columns: repeat(2, 1fr); }
  .frow-group { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .trio { grid-template-columns: 1fr; }
  .frow-group { grid-template-columns: 1fr; }
  .hero-foot { flex-direction: column; align-items: flex-start; gap: 16px; }
  .sub-p { text-align: left; max-width: 100%; }
  .step { grid-template-columns: 2.2rem 1fr; gap: 12px; }
  .step-num { font-size: 1.1rem; }
}