:root { --ink: #172638; --muted: #526378; --blue: #1c64a0; --line: #ccd7e1; --paper: #f5f8fb; --white: #fff; }
* { box-sizing: border-box; }
html { color: var(--ink); background: var(--paper); font-family: Arial, sans-serif; }
body { margin: 0; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; }
.skip { position: absolute; transform: translateY(-150%); padding: 1rem; background: var(--white); }
.skip:focus { transform: none; }
.masthead, main, footer { width: min(1120px, calc(100% - 48px)); margin-inline: auto; }
.masthead { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding-block: 28px; border-bottom: 1px solid var(--line); font-size: .75rem; font-weight: 700; letter-spacing: .08em; }
.brand { display: inline-flex; gap: 14px; align-items: center; font-size: 1.3rem; letter-spacing: -.04em; }
.brand span { color: var(--blue); font-size: 1.8rem; }
.masthead nav a { color: var(--blue); text-decoration-thickness: 1px; text-underline-offset: 4px; }
.intro { padding: clamp(44px, 7vw, 86px) 0 50px; }
.eyebrow, .number { color: var(--blue); font-size: .72rem; font-weight: 700; letter-spacing: .09em; }
h1 { margin: 20px 0; font-size: clamp(2.25rem, 5vw, 4.3rem); line-height: 1.04; letter-spacing: -.045em; }
.lead { max-width: 650px; margin: 24px 0 0; color: var(--muted); font-size: 1.15rem; line-height: 1.6; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; margin-bottom: 20px; }
h2 { font-size: 1.2rem; letter-spacing: -.02em; }
.section-heading span { color: var(--muted); font-size: .85rem; }
.guides { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 0; padding: 0; list-style: none; }
.guide { height: 100%; display: grid; grid-template-columns: 1fr auto; padding: 30px; border: 1px solid var(--line); border-radius: 16px; background: var(--white); text-decoration: none; transition: border-color .15s, box-shadow .15s; }
.guide:hover { border-color: var(--blue); box-shadow: 0 7px 22px #1726380c; }
.number, .guide h3, .guide p { grid-column: 1 / -1; }
.guide h3 { margin: 24px 0 12px; font-size: 1.8rem; line-height: 1.2; letter-spacing: -.025em; }
.guide p { margin: 0 0 30px; max-width: 44ch; color: var(--muted); line-height: 1.6; }
.download { align-self: end; color: var(--blue); font-weight: 700; font-size: .95rem; }
.download span { margin-left: 7px; }
.format { align-self: end; color: var(--muted); font-size: .8rem; }
.start { display: grid; grid-template-columns: 1fr 2fr; align-items: start; gap: 32px; padding: 34px 0; margin-top: 44px; border-top: 1px solid var(--line); }
.start h2, .start p { margin: 0; }
.start p { max-width: 64ch; color: var(--muted); line-height: 1.65; }
footer { display: flex; justify-content: space-between; gap: 20px; padding: 26px 0 36px; border-top: 1px solid var(--line); color: var(--muted); font-size: .75rem; }
@media (max-width: 640px) {
  .masthead, main, footer { width: calc(100% - 36px); }
  .masthead { font-size: .6rem; padding-block: 20px; }
  .brand { font-size: 1.05rem; gap: 8px; }
  h1 br { display: none; }
  .lead { font-size: 1.05rem; }
  .guides { grid-template-columns: 1fr; }
  .guide { padding: 24px; }
  .guide h3 { font-size: 1.65rem; }
  .start { grid-template-columns: 1fr; gap: 14px; }
  footer { flex-direction: column; gap: 8px; }
}
@media (prefers-reduced-motion: reduce) { .guide { transition: none; } }