:root{--bg:#f5f8fb;--surface:#ffffff;--ink:#13263a;--muted:#4a5c6d;--accent:#1d5b94;--accent-ink:#ffffff;--accent2:#2b6a4b;--line:#d3dfe9;--hero-ink:#ffffff;--r:6px;--maxw:1200px;--measure:68ch;--hf:'Neuton', Georgia, serif;--bf:'Source Sans 3', system-ui, sans-serif}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 var(--bf)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:.18em}
h1,h2,h3,h4{font-family:var(--hf);line-height:1.18;margin:1.6em 0 .5em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(2rem,5vw,3.8rem);margin-top:0}
h2{font-size:clamp(1.4rem,3vw,2rem)}h3{font-size:1.2rem}
p,ul,ol,table,details{margin:0 0 1.1em}
.wrap{max-width:max(var(--maxw),min(88vw,1760px));margin:0 auto;padding:0 20px}
@media(min-width:1800px){body article.prose>:is(p,ul,ol,h2,h3,h4,blockquote,dl,details,.callout,.disclosure,.table-wrap){max-width:52rem}}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:var(--surface);padding:8px;z-index:9}
header.site{border-bottom:1px solid var(--line);background:var(--surface)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.brand{font-family:var(--hf);font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px}
.brand svg{flex:none}
nav.main ul{list-style:none;display:flex;flex-wrap:wrap;gap:4px 18px;margin:0;padding:0}
nav.main a{color:var(--ink);text-decoration:none;font-size:.95rem;padding:4px 0;border-bottom:2px solid transparent}
nav.main a[aria-current]{border-color:var(--accent)}
.menu-btn{display:none}
@media(max-width:760px){.menu-btn{display:inline-block;background:none;border:1px solid var(--line);color:var(--ink);border-radius:var(--r);padding:6px 12px;font:inherit}
nav.main{width:100%;display:none}nav.main.open{display:block}nav.main ul{flex-direction:column;gap:6px}}
.hero{position:relative;overflow:hidden}
.hero .wrap{padding-top:56px;padding-bottom:56px}
.hero .lead{font-size:1.18rem;color:var(--muted);max-width:60ch}
.hero.full{color:var(--hero-ink);min-height:440px;display:flex;align-items:flex-end}
.hero.full img.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.hero.full::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.62))}
.hero.full .wrap{position:relative;z-index:1;width:100%}.hero.full .lead{color:inherit;opacity:.92}
.hero.split .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero.split img{border-radius:var(--r);aspect-ratio:4/3;object-fit:cover;width:100%}
.hero.banner img{width:100%;max-height:380px;object-fit:cover;border-radius:var(--r);margin-top:28px}
.hero.plain{background:var(--surface);border-bottom:1px solid var(--line)}
@media(max-width:760px){.hero.split .wrap{grid-template-columns:1fr}.hero.full{min-height:340px}.hero .wrap{padding-top:36px;padding-bottom:36px}}
.page{display:grid;gap:48px;padding-top:40px;padding-bottom:64px}
.page.toc-layout{grid-template-columns:220px minmax(0,1fr)}
.page.toc-layout .toc{position:sticky;top:20px;align-self:start;font-size:.92rem;border-left:3px solid var(--accent);padding-left:14px}
.page.toc-layout .toc ul{list-style:none;padding:0;margin:0}.page.toc-layout .toc li{margin:.35em 0}
.page.toc-layout .toc a{color:var(--muted);text-decoration:none}
@media(max-width:860px){.page.toc-layout{grid-template-columns:1fr}.page.toc-layout .toc{position:static}}
/* Content uses the full container width (cards, grids, tables); only running text keeps a readable measure. */
article.prose{max-width:none;min-width:0}
article.prose>:is(p,ul,ol,h2,h3,h4,blockquote,dl,details,.callout,.disclosure,.table-wrap){max-width:47.5rem;margin-left:auto;margin-right:auto}
.page.toc-layout article.prose>*{margin-left:0;margin-right:0}
/* A heading that introduces a full-width block (cards, grid, table) lines up with that block, not the text column. */
body article.prose>:is(h2,h3):has(+ :is(.cards,nav,div,table,section,ul.grid)){max-width:none;margin-left:0;margin-right:0}
.page.wide article.prose>*{max-width:none}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin:0 0 1.4em}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.card h3{margin-top:0}.card p:last-child{margin-bottom:0}
a.card{display:block;color:var(--ink);text-decoration:none}a.card:hover{border-color:var(--accent)}
.callout{border-left:4px solid var(--accent2);background:var(--surface);padding:14px 18px;border-radius:0 var(--r) var(--r) 0;margin:0 0 1.2em}
.table-wrap{overflow-x:auto;margin:0 0 1.2em}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{border-bottom:1px solid var(--line);padding:9px 10px;text-align:left;vertical-align:top}
th{font-family:var(--hf);background:var(--surface)}
details{border:1px solid var(--line);border-radius:var(--r);padding:10px 16px;background:var(--surface)}
summary{cursor:pointer;font-weight:600}
.steps{counter-reset:s;list-style:none;padding:0}.steps li{counter-increment:s;position:relative;padding-left:44px;margin-bottom:1em}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-weight:700;font-size:.9rem}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:10px 18px;border-radius:var(--r);text-decoration:none;font-weight:600;border:0;font:inherit;cursor:pointer}
.aff{border:1px dashed var(--accent);border-radius:var(--r);padding:16px 18px;margin:0 0 1.2em;background:var(--surface)}
.aff .tag{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.disclosure{font-size:.88rem;color:var(--muted);border:1px solid var(--line);border-radius:var(--r);padding:10px 14px;margin:0 0 1.6em}
.meta{font-size:.88rem;color:var(--muted)}
dl dt{font-family:var(--hf);font-weight:700;margin-top:1em}dl dd{margin:.2em 0 0 0;color:var(--ink)}
footer.site{border-top:1px solid var(--line);background:var(--surface);font-size:.92rem;color:var(--muted)}
footer.site .wrap{padding-top:32px;padding-bottom:32px;display:grid;gap:18px}
footer.site ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px 18px}
footer.site a{color:var(--muted)}
.sa{font-size:17.5px}
.sa h1,.sa h2,.sa h3{letter-spacing:0}
.sa header.site{background:#fff;border-bottom:0;border-top:5px solid var(--accent);position:relative}
.sa header.site::after{content:"";position:absolute;left:0;right:0;bottom:-10px;height:10px;background:linear-gradient(135deg,#d3dfe9 25%,transparent 25%) 0 0/20px 20px,linear-gradient(225deg,#d3dfe9 25%,transparent 25%) 0 0/20px 20px;z-index:1}
.sa .brand{font-size:1.55rem;color:#123a5f}
.sa nav.main a{font-weight:600;font-size:.92rem;color:#24425e}
.sa nav.main a:hover{color:var(--accent)}
.sa nav.main a[aria-current]{border-color:var(--accent2);color:var(--accent2)}
.sa .hero .kicker{font:700 .76rem/1.2 var(--bf);text-transform:uppercase;letter-spacing:.17em;color:var(--accent2);margin-bottom:1em}
.sa .hero.plain,.sa .hero.split{background:linear-gradient(180deg,#e6f0f8 0%,#f5f8fb 100%);border-bottom:1px solid var(--line)}
.sa .hero.plain .wrap,.sa .hero.split .wrap{padding-top:58px;padding-bottom:52px}
.sa .hero h1{color:#123a5f;max-width:21ch}
.sa .hero .lead{max-width:58ch}
.sa .hero.split img{border-radius:var(--r);box-shadow:0 18px 40px rgba(18,58,95,.18);border:6px solid #fff}
.sa .hero.plain .wrap:has(.art){display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);grid-template-rows:1fr auto auto auto 1fr;column-gap:56px}
.sa .hero.plain .wrap:has(.art)>.kicker{grid-column:1;grid-row:2}.sa .hero.plain .wrap:has(.art)>h1{grid-column:1;grid-row:3}.sa .hero.plain .wrap:has(.art)>.lead{grid-column:1;grid-row:4}
.sa .hero.plain .art{grid-column:2;grid-row:1/6;align-self:center}
.sa .hero.plain .art svg{width:100%;max-width:680px;display:block;margin-left:auto;border-radius:var(--r);box-shadow:0 18px 40px rgba(18,58,95,.16);border:6px solid #fff}
@media(max-width:860px){.sa .hero.plain .wrap:has(.art){grid-template-columns:1fr;grid-template-rows:none}.sa .hero.plain .wrap:has(.art)>*{grid-column:1!important;grid-row:auto!important}.sa .hero.plain .art{margin-top:20px}.sa .hero.plain .art svg{max-width:460px;margin:0}}
.sa .prose h2{font-size:clamp(1.6rem,3vw,2.2rem);color:#123a5f;display:flex;align-items:baseline;gap:12px}
.sa .prose h2::before{content:"";flex:none;width:0;height:0;border-left:8px solid transparent;border-right:8px solid transparent;border-bottom:13px solid var(--accent2);transform:translateY(-2px)}
.sa .prose h3{color:#123a5f}
.sa .callout{border-left-color:var(--accent);background:#e9f2f9;border-radius:0 var(--r) var(--r) 0}
.sa .callout.warn{border-left-color:#b5462f;background:#fbefe9}
.sa th{background:#e8f0f7;font-family:var(--bf);font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:#123a5f}
.sa td.num{white-space:nowrap;font-variant-numeric:tabular-nums}
.sa details{border-color:var(--line)}
.sa summary{color:#123a5f}
.sa .steps li::before{background:var(--accent2);border-radius:4px}
.sa figure.ph{margin:0 0 1.6em}.sa figure.ph img{border-radius:var(--r);width:100%;aspect-ratio:16/8;object-fit:cover}
.sa figure.ph figcaption,.sa figure.alt figcaption{font-size:.88rem;color:var(--muted);margin-top:.5em}
/* Signature: altitude profile */
.sa figure.alt{margin:0 0 1.4em;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:14px}
.sa svg.prof{display:block;width:100%;height:auto}
.sa .prof .sky{fill:#e3eef7}.sa .prof .mtn{fill:#fbfdff}.sa .prof .forest{fill:#d7e7dc}
.sa .prof .pines path{fill:#2b6a4b}.sa .prof .ridge{fill:none;stroke:#123a5f;stroke-width:2.2;stroke-linejoin:round}
.sa .prof .band{stroke:#1d5b94;stroke-width:1.3;stroke-dasharray:6 6;opacity:.75}.sa .prof .band.tl{stroke:#2b6a4b;stroke-width:2}
.sa .prof .mk circle{fill:#1d5b94;stroke:#fff;stroke-width:2}.sa .prof .mk text{fill:#fff;font:700 14px var(--bf)}
.sa .prof .bl{fill:#123a5f;font:700 14px var(--bf);paint-order:stroke;stroke:#fbfdff;stroke-width:4px}
.sa .prof .ax{fill:#4a5c6d;font:600 12px var(--bf)}.sa .prof .axis,.sa .prof .tick{stroke:#8aa0b3;stroke-width:1.2}
.sa .prof .ground{stroke:#123a5f;stroke-width:2}.sa .prof .soil{fill:#c9dccf}
.sa ol.bands{list-style:none;padding:0;margin:0 0 1.6em;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px}
.sa ol.bands li{display:flex;gap:12px;background:#fff;border:1px solid var(--line);border-top:4px solid var(--accent);border-radius:var(--r);padding:14px 16px}
.sa ol.bands li:nth-child(3){border-top-color:var(--accent2)}
.sa ol.bands .n{flex:none;width:28px;height:28px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;font-weight:700;font-size:.9rem}
.sa ol.bands h3{margin:0 0 .15em;font-size:1.12rem}.sa ol.bands p{margin:0 0 .4em;font-size:.94rem}.sa ol.bands p.rg{font-weight:700;color:var(--accent2);font-size:.85rem;text-transform:uppercase;letter-spacing:.05em}
/* Season strip */
.sa .lv{display:inline-flex;align-items:center;gap:3px;white-space:nowrap}.sa .lv i{display:block;width:14px;height:10px;border-radius:2px;background:#dbe5ee}.sa .lv i.on{background:var(--accent)}
.sa .lv em{font-style:normal;font-size:.85rem;color:var(--muted);margin-left:6px}
.sa table.season td:nth-child(3) .lv i.on{background:#b5462f}
.sa .day{display:inline-block;width:70px;height:8px;background:#dbe5ee;border-radius:4px;margin-right:8px;vertical-align:middle;overflow:hidden}.sa .day i{display:block;height:100%;background:#e0a526}
/* Avalanche danger scale */
.sa ol.danger{list-style:none;padding:0;margin:0 0 1.6em;display:grid;gap:10px}
.sa ol.danger li{display:flex;gap:16px;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.sa ol.danger .lvl{flex:none;width:64px;display:grid;place-items:center;font:800 1.8rem/1 var(--hf);color:#13263a}
.sa ol.danger .d1 .lvl{background:#ccff66}.sa ol.danger .d2 .lvl{background:#ffff00}.sa ol.danger .d3 .lvl{background:#ff9900}.sa ol.danger .d4 .lvl{background:#ff0000;color:#fff}
.sa ol.danger .d5 .lvl{background:repeating-conic-gradient(#ff0000 0 25%,#13263a 0 50%) 0 0/24px 24px}.sa ol.danger .d5 .lvl::before{content:"5";display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:#fff;color:#13263a}.sa ol.danger .d5 .lvl{font-size:0}.sa ol.danger .d5 .lvl::before{font-size:1.6rem}
.sa ol.danger div{padding:12px 16px 10px 0}.sa ol.danger h3{margin:0 0 .2em;font-size:1.15rem}.sa ol.danger p{margin:0;font-size:.95rem}
/* Guide cards */
.sa .guides{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin:0 0 2em}
.sa a.gd{position:relative;display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px 20px 18px 66px;color:var(--ink);text-decoration:none;transition:border-color .15s,transform .15s,box-shadow .15s}
.sa a.gd:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 10px 22px rgba(18,58,95,.1)}
.sa a.gd .pin{position:absolute;left:18px;top:20px;width:32px;height:32px;display:grid;place-items:center;font:800 1.05rem/1 var(--hf);color:#fff;background:var(--accent);clip-path:polygon(50% 0,100% 100%,0 100%);padding-top:9px}
.sa a.gd:nth-child(3n+2) .pin{background:var(--accent2)}
.sa a.gd h3{margin:0 0 .3em;font-size:1.2rem;color:#123a5f}.sa a.gd p{margin:0;color:var(--muted);font-size:.95rem}
.sa .sources{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin:0 0 1.6em}
.sa a.src{display:block;background:#fff;border:1px solid var(--line);border-left:4px solid var(--accent2);border-radius:var(--r);padding:12px 14px;color:var(--ink);text-decoration:none}
.sa a.src strong{display:block;color:#123a5f}.sa a.src span{display:block;font-size:.92rem;color:var(--muted)}.sa a.src em{display:block;font-style:normal;font-size:.82rem;color:var(--accent);margin-top:.3em}
.sa ul.check{list-style:none;padding:0}.sa ul.check li{position:relative;padding-left:30px;margin-bottom:.6em}
.sa ul.check li::before{content:"";position:absolute;left:2px;top:.35em;width:14px;height:14px;border:2px solid var(--accent2);border-radius:3px}
.sa footer.site{background:#123a5f;color:#d8e4ee;border-top:0;position:relative}
.sa footer.site::before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px;background:linear-gradient(135deg,transparent 50%,#123a5f 50%) 0 0/28px 28px,linear-gradient(225deg,transparent 50%,#123a5f 50%) 0 0/28px 28px}
.sa footer.site a{color:#cfe6d8}
.sa .page.toc-layout .toc{border-left:2px solid var(--accent2)}
.sa .page.toc-layout .toc strong{font-family:var(--hf);color:#123a5f;font-size:1.1rem}
@media(min-width:1800px){.sa .hero.plain .art svg{max-width:820px}.sa .guides{grid-template-columns:repeat(3,1fr)}}