:root{--navy:#0c1927;--blue:#123e66;--cyan:#72d5de;--red:#d94332;--cream:#f4ead5;--paper:#fffdf8;--yellow:#f2c84b;--ink:#101820;--muted:#5a646b;--line:#9ab3bf;--max:1160px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--ink);font-family:Arial,sans-serif;line-height:1.62}a{color:inherit;text-underline-offset:.2em}.wrap{width:min(calc(100% - 2rem),var(--max));margin:auto}.skip{position:fixed;z-index:10;top:.5rem;left:.5rem;transform:translateY(-160%);padding:.7rem 1rem;background:var(--yellow)}.skip:focus{transform:none}.head{background:var(--cream);border-top:.5rem solid var(--red);border-bottom:1px solid var(--ink)}.head-inner{display:grid;gap:1rem;padding:1rem 0}.brand{text-decoration:none}.brand b{display:block;font:900 clamp(2rem,7vw,4.6rem)/.84 "Courier New",monospace;letter-spacing:-.08em;text-transform:uppercase}.brand span{font:.72rem "Courier New",monospace;letter-spacing:.12em;text-transform:uppercase}.nav ul{display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;margin:0;padding:0;list-style:none}.nav a{font:bold .78rem "Courier New",monospace;text-decoration:none;text-transform:uppercase}.nav a:hover,.nav a[aria-current=page]{color:var(--red)}.hero{background:var(--blue);color:#fff}.hero-grid{display:grid;min-height:38rem}.hero-copy{align-self:center;padding:4rem 0}.label{color:var(--red);font:bold .73rem "Courier New",monospace;letter-spacing:.15em;text-transform:uppercase}.hero .label{color:var(--yellow)}h1,h2,h3{font-family:"Courier New",monospace;line-height:.94}h1{max-width:12ch;margin:.5rem 0 1.4rem;font-size:clamp(3.3rem,12vw,8.2rem);letter-spacing:-.085em;text-transform:uppercase}h2{margin:.3rem 0 1rem;font-size:clamp(2.2rem,7vw,5rem);letter-spacing:-.065em;text-transform:uppercase}h3{margin:.25rem 0 .65rem;font-size:clamp(1.45rem,4vw,2.25rem);letter-spacing:-.04em}.lede{max-width:55ch;font-size:clamp(1.05rem,2vw,1.3rem)}.height-scale{display:grid;grid-template-rows:repeat(4,1fr);border-left:1px solid var(--cyan)}.scale-mark{position:relative;display:flex;align-items:flex-end;padding:1rem 1rem 1rem 2rem;border-bottom:1px solid #4d7190}.scale-mark:before{content:"";position:absolute;left:-.45rem;bottom:1.45rem;width:.8rem;height:2px;background:var(--cyan)}.scale-mark b{font:900 2rem "Courier New",monospace;color:var(--cyan)}.scale-mark span{margin-left:.6rem;font:.72rem "Courier New",monospace;text-transform:uppercase}.section{padding:clamp(3.5rem,8vw,7rem) 0}.intro-grid{display:grid;gap:1rem;margin-bottom:2.5rem}.intro-grid p{max-width:60ch;color:var(--muted)}.levels{border-top:3px solid var(--ink)}.level{display:grid;gap:1rem;padding:1.5rem 0;border-bottom:1px solid var(--ink)}.altitude{font:900 clamp(2.3rem,7vw,5rem)/.9 "Courier New",monospace;color:var(--red)}.altitude small{display:block;font-size:.7rem;letter-spacing:.12em;text-transform:uppercase}.cover{display:grid;min-height:12rem;place-content:center;padding:1rem;border:1px solid var(--ink);background:repeating-linear-gradient(0deg,var(--paper) 0,var(--paper) 17px,#d7e4e7 18px);text-align:center}.cover b{font:900 1.5rem/1 "Courier New",monospace;text-transform:uppercase}.cover small{margin-top:.5rem}.book-copy{display:flex;flex-direction:column}.meta{margin-top:0;color:var(--muted);font-size:.85rem}.actions{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:auto;padding-top:.7rem}.button{display:inline-flex;align-items:center;justify-content:center;min-height:2.8rem;padding:.6rem .85rem;border:2px solid var(--ink);background:transparent;font:bold .78rem "Courier 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1fr;gap:.6rem;padding:.7rem 0;border-bottom:1px solid var(--line)}.fact-list b{font:bold .7rem "Courier New",monospace;text-transform:uppercase}.notice{padding:1rem;border:2px solid var(--blue);background:#e5eef0}.sources li{margin-bottom:.5rem}.footer{padding:2.5rem 0;background:var(--blue);color:#eaf4f3}.footer-grid{display:grid;gap:1.5rem}.footer-links{display:flex;flex-wrap:wrap;gap:.6rem 1rem}.footer p{max-width:64ch;color:#c2d5d7;font-size:.84rem}.sr{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:48rem){.head-inner{grid-template-columns:1fr auto;align-items:end}.hero-grid{grid-template-columns:1.25fr .55fr;gap:3rem}.intro-grid{grid-template-columns:1.2fr .8fr;align-items:end}.level{grid-template-columns:8rem 12rem 1fr;align-items:stretch}.method-grid{grid-template-columns:repeat(3,1fr)}.page-grid{grid-template-columns:minmax(0,1fr) 19rem}.footer-grid{grid-template-columns:1fr 1.3fr}}
@media(min-width:74rem){.level:nth-child(even){grid-template-columns:8rem 1fr 12rem}.level:nth-child(even) .cover{grid-column:3}.level:nth-child(even) .book-copy{grid-column:2;grid-row:1}.level:nth-child(even) .altitude{grid-column:1;grid-row:1}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.nav,.actions,.skip{display:none}body,.dossier{background:#fff}}