:root{
  color-scheme:dark;
  --ink:#e9f2f2;
  --muted:#9fb0b4;
  --bg:#071116;
  --bg2:#0b181e;
  --panel:#102229;
  --line:rgba(190,224,226,.16);
  --aqua:#51d8df;
  --aqua2:#9beff0;
  --rust:#d65b36;
  --sand:#cbb890;
  --shadow:0 28px 80px rgba(0,0,0,.28);
  --shell:min(1180px,calc(100% - 40px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Avenir Next",Avenir,"Segoe UI",Helvetica,Arial,sans-serif;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--aqua);outline-offset:4px}
img{max-width:100%;display:block}
.shell{width:var(--shell);margin-inline:auto}
.skip-link{position:fixed;left:16px;top:12px;z-index:1000;padding:10px 14px;background:white;color:black;transform:translateY(-150%)}
.skip-link:focus{transform:none}
.site-header{position:fixed;inset:0 0 auto;z-index:100;background:linear-gradient(to bottom,rgba(3,9,12,.88),rgba(3,9,12,.28),transparent);transition:background .25s ease}
.site-header.scrolled{background:rgba(5,14,18,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav-shell{width:var(--shell);height:82px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.01em}
.brand img{width:42px;height:42px;border-radius:50%;object-fit:cover;border:1px solid rgba(255,255,255,.26);box-shadow:0 5px 20px rgba(0,0,0,.32)}
nav{display:flex;gap:28px;align-items:center}
nav a{font-size:.86rem;text-transform:uppercase;letter-spacing:.12em;color:#dce8e9}
nav a:hover{color:var(--aqua2)}
.nav-toggle{display:none;background:transparent;border:1px solid var(--line);color:white;border-radius:999px;padding:9px 14px}
.hero{min-height:760px;height:100svh;position:relative;display:flex;align-items:flex-end;overflow:hidden;background:#050b0d}
.hero-media{position:absolute;inset:0;background-image:url('/assets/images/paul-cave.webp');background-size:cover;background-position:center 34%;transform:scale(1.01)}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(2,7,9,.93) 0%,rgba(2,8,10,.65) 44%,rgba(2,8,10,.14) 72%),linear-gradient(0deg,rgba(2,7,9,.9) 0%,transparent 45%),radial-gradient(circle at 70% 45%,transparent 0%,rgba(0,0,0,.14) 60%)}
.hero-content{position:relative;z-index:2;padding-bottom:11vh;max-width:1180px}
.eyebrow,.kicker{margin:0 0 18px;text-transform:uppercase;letter-spacing:.18em;font-size:.76rem;font-weight:700;color:var(--aqua2)}
.hero h1{font-size:clamp(3.5rem,8vw,7.7rem);line-height:.88;letter-spacing:-.055em;max-width:900px;margin:0;text-wrap:balance}
.hero h1 span{display:block;color:transparent;-webkit-text-stroke:1px rgba(235,248,248,.72)}
.hero-copy{font-size:clamp(1.05rem,1.7vw,1.28rem);max-width:660px;color:#d0dddd;margin:28px 0 0}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:49px;padding:0 20px;border-radius:4px;font-weight:700;letter-spacing:.02em;transition:transform .16s ease,background .16s ease,border-color .16s ease}
.button:hover{transform:translateY(-2px)}
.button.primary{background:var(--aqua);color:#041014;box-shadow:0 10px 32px rgba(81,216,223,.18)}
.button.primary:hover{background:var(--aqua2)}
.button.ghost{border:1px solid rgba(255,255,255,.32);background:rgba(4,12,15,.28);backdrop-filter:blur(8px)}
.photo-credit{position:absolute;right:22px;bottom:18px;z-index:2;color:rgba(255,255,255,.58);font-size:.72rem;letter-spacing:.04em}
.section{padding:110px 0;border-top:1px solid var(--line)}
.section h2{margin:0;font-size:clamp(2.25rem,5vw,4.75rem);line-height:1.02;letter-spacing:-.045em}
.section-intro{background:linear-gradient(135deg,#0b191f,#071116 62%)}
.split-intro{display:grid;grid-template-columns:.8fr 1.2fr;gap:8vw;align-items:start}
.prose{font-size:1.07rem;color:#c6d2d4;max-width:690px}
.prose p:first-child{margin-top:4px}
.prose p{margin:0 0 20px}
.associations{margin-top:64px;display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:8px;overflow:hidden}
.associations a{padding:21px 18px;text-align:center;font-weight:800;letter-spacing:.1em;border-right:1px solid var(--line);background:rgba(255,255,255,.018)}
.associations a:last-child{border-right:0}
.associations a:hover{background:rgba(81,216,223,.08);color:var(--aqua2)}
.section-training{background:#0d1b21}
.section-heading-row{display:grid;grid-template-columns:1.25fr .75fr;gap:8vw;align-items:end}
.section-heading-row>p{color:var(--muted);font-size:1.05rem;margin:0 0 8px;max-width:380px}
.training-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:62px}
.service-card{min-height:330px;padding:28px 24px;background:linear-gradient(145deg,rgba(18,43,51,.96),rgba(11,28,34,.96));border:1px solid var(--line);border-radius:9px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.service-card::after{content:"";position:absolute;inset:auto -80px -90px auto;width:210px;height:210px;border-radius:50%;border:1px solid rgba(81,216,223,.14)}
.service-no{font-size:.72rem;color:var(--aqua);letter-spacing:.18em}
.service-card h3{font-size:1.45rem;margin:46px 0 20px;letter-spacing:-.02em}
.service-card ul{list-style:none;padding:0;margin:0;color:#adbdc0}
.service-card li{padding:6px 0;border-bottom:1px solid rgba(255,255,255,.055)}
.text-link{display:inline-block;margin-top:34px;color:var(--aqua2);font-weight:700}
.section-expeditions{background:#081216}
.expedition-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:9vw;align-items:start}
.expedition-title{position:sticky;top:126px}
.expedition-title p:last-child{color:var(--muted);max-width:420px}
.timeline{list-style:none;padding:0;margin:0;border-top:1px solid var(--line)}
.timeline li{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--line);align-items:start}
.timeline time{font-size:.78rem;color:var(--aqua);letter-spacing:.13em;font-weight:800;padding-top:3px}
.timeline strong{display:block;font-size:1.18rem;line-height:1.25}
.timeline span{display:block;margin-top:5px;color:var(--muted);font-size:.92rem}
.section-video{background:radial-gradient(circle at 30% 20%,#17313a 0,#0a181e 42%,#071116 78%)}
.video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:56px}
.video-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#0a151a;box-shadow:var(--shadow)}
.video-poster{aspect-ratio:16/9;background:linear-gradient(135deg,#183139,#091216);display:flex;align-items:center;justify-content:center;gap:12px;color:white;cursor:pointer;border-bottom:1px solid var(--line);position:relative}
.video-poster::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 35% 35%,rgba(81,216,223,.16),transparent 45%)}
.video-poster>*{position:relative}
.play{width:52px;height:52px;border:1px solid rgba(255,255,255,.35);border-radius:50%;display:grid;place-items:center;padding-left:3px;background:rgba(0,0,0,.2)}
.video-copy{padding:24px}
.video-copy .meta{margin:0 0 12px;color:var(--aqua);font-size:.7rem;text-transform:uppercase;letter-spacing:.15em;font-weight:800}
.video-copy h3{margin:0 0 10px;font-size:1.32rem;line-height:1.2}
.video-copy p:last-child{margin:0;color:var(--muted);font-size:.94rem}
.video-frame{width:100%;aspect-ratio:16/9;border:0;display:block;background:black}
.section-availability{background:#0c1b20}
.availability-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:8vw;align-items:start}
.availability-grid>div>p:last-child{color:var(--muted);max-width:480px}
.calendar-panel{border:1px solid var(--line);border-radius:8px;background:#081216;overflow:hidden}
.calendar-panel summary{cursor:pointer;padding:24px;font-weight:800;color:var(--aqua2);list-style:none}
.calendar-panel summary::-webkit-details-marker{display:none}
.calendar-panel summary::after{content:"+";float:right;font-size:1.25rem;font-weight:400}
.calendar-panel[open] summary::after{content:"–"}
.calendar-slot iframe{width:100%;height:620px;border:0;background:white}
.section-contact{padding:125px 0;background:linear-gradient(135deg,#153039 0,#081317 58%)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:11vw;align-items:start}
.contact-lede{color:#c1ced0;font-size:1.08rem;max-width:500px;margin:22px 0 28px}
.contact-card{font-style:normal;border-top:1px solid var(--line)}
.contact-card>div{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:19px 0;border-bottom:1px solid var(--line)}
.contact-card span{font-size:.72rem;color:var(--aqua);text-transform:uppercase;letter-spacing:.13em;font-weight:800}
.contact-card a:hover{color:var(--aqua2)}
.contact-card p{margin:0}
.contact-card .social-row{grid-template-columns:repeat(3,1fr);gap:10px}
.social-row a{padding:10px 0;text-align:center;border:1px solid var(--line);border-radius:4px;font-size:.86rem}
.site-footer{border-top:1px solid var(--line);background:#050c0f;padding:28px 0}
.footer-row{display:flex;justify-content:space-between;align-items:center;color:var(--muted)}
.footer-row div{display:flex;gap:12px;align-items:baseline}
.footer-row strong{color:var(--ink)}
.footer-row a{color:var(--aqua2);font-size:.86rem}
@media (max-width:900px){
  :root{--shell:min(100% - 30px,1180px)}
  .nav-shell{height:70px}
  .nav-toggle{display:block}
  nav{position:absolute;top:70px;left:15px;right:15px;padding:18px;background:rgba(5,14,18,.97);border:1px solid var(--line);border-radius:8px;display:none;flex-direction:column;align-items:flex-start;gap:14px}
  nav.open{display:flex}
  .hero{min-height:720px}
  .hero-media{background-image:url('/assets/images/paul-cave-1600.webp');background-position:58% 38%}
  .hero-shade{background:linear-gradient(0deg,rgba(2,7,9,.96) 0%,rgba(2,8,10,.65) 55%,rgba(2,8,10,.23) 100%)}
  .hero-content{padding-bottom:8vh}
  .hero h1{font-size:clamp(3.1rem,13vw,5.4rem)}
  .split-intro,.section-heading-row,.expedition-layout,.availability-grid,.contact-grid{grid-template-columns:1fr;gap:42px}
  .associations{grid-template-columns:1fr 1fr}
  .associations a:nth-child(2){border-right:0}
  .associations a:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .training-grid{grid-template-columns:1fr 1fr}
  .expedition-title{position:static}
  .video-grid{grid-template-columns:1fr}
}
@media (max-width:600px){
  .section{padding:78px 0}
  .hero-copy{font-size:1rem}
  .photo-credit{right:15px;bottom:12px}
  .training-grid,.associations{grid-template-columns:1fr}
  .associations a{border-right:0;border-bottom:1px solid var(--line)}
  .associations a:last-child{border-bottom:0}
  .service-card{min-height:0}
  .timeline li{grid-template-columns:76px 1fr}
  .contact-card>div{grid-template-columns:88px 1fr}
  .contact-card .social-row{grid-template-columns:1fr}
  .footer-row,.footer-row div{align-items:flex-start;flex-direction:column;gap:8px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}

/* Candidate 2: semantic controls and quiet site attribution */
.video-poster{width:100%;margin:0;border-top:0;border-left:0;border-right:0;font:inherit}
.source-link{margin-top:2px}
.site-credit{font-size:.76rem;color:#72868b;white-space:nowrap}
.site-credit a{color:#9fb0b4;text-decoration:underline;text-decoration-color:rgba(159,176,180,.35);text-underline-offset:3px}
.site-credit a:hover{color:var(--aqua2);text-decoration-color:currentColor}
.back-top{white-space:nowrap}
@media (max-width:900px){.site-credit{white-space:normal}}


/* Candidate 4 release candidate: print treatment */
@media print{
  :root{--shell:100%;--bg:#fff;--panel:#fff;--ink:#111;--muted:#444;--line:#bbb;--aqua:#087c84;--aqua2:#087c84}
  *{box-shadow:none!important;text-shadow:none!important}
  html{background:#fff;scroll-behavior:auto}
  body{background:#fff!important;color:#111!important;font-size:10.5pt;line-height:1.4}
  .site-header{position:static!important;background:#fff!important;border-bottom:1px solid #bbb!important;backdrop-filter:none!important}
  .nav-shell{height:auto;padding:10px 0}
  .nav-toggle,nav,.skip-link{display:none!important}
  .brand{color:#111!important}
  .brand img{width:34px;height:34px}
  .hero{min-height:0!important;background:#fff!important;color:#111!important;border-bottom:1px solid #bbb}
  .hero-media,.hero-shade{display:none!important}
  .hero-content{position:static!important;padding:34px 0 26px!important}
  .hero h1{color:#111!important;font-size:42pt!important;line-height:.98!important;max-width:none!important}
  .hero h1 .outline{-webkit-text-stroke:0!important;color:#555!important}
  .hero-copy{color:#333!important;max-width:none}
  .hero .eyebrow,.eyebrow,.meta,.timeline .year{color:#087c84!important}
  .hero-actions,.photo-credit{display:none!important}
  .section{padding:28px 0!important;background:#fff!important;color:#111!important;border-bottom:1px solid #bbb!important}
  .split-intro,.section-heading-row,.expedition-layout,.availability-grid,.contact-grid{grid-template-columns:1fr!important;gap:20px!important}
  .section h2{font-size:28pt!important;color:#111!important;max-width:none!important}
  .section-copy,.section p,.service-card li,.timeline p,.video-copy p,.contact-card p{color:#333!important}
  .associations{grid-template-columns:repeat(4,1fr)!important;border-color:#bbb!important}
  .associations a{color:#111!important;border-color:#bbb!important}
  .training-grid{grid-template-columns:repeat(2,1fr)!important;gap:10px!important}
  .service-card,.video-card,.calendar-panel,.contact-card{background:#fff!important;border:1px solid #bbb!important;break-inside:avoid;page-break-inside:avoid}
  .service-card{min-height:0!important;padding:18px!important}
  .expedition-title{position:static!important}
  .timeline li{grid-template-columns:74px 1fr!important;break-inside:avoid;page-break-inside:avoid;padding:12px 0!important;border-color:#bbb!important}
  .video-grid{grid-template-columns:repeat(3,1fr)!important;gap:10px!important}
  .video-poster{display:none!important}
  .video-copy{padding:16px!important}
  .availability .calendar-panel{display:none!important}
  .contact-card>div{border-color:#bbb!important}
  .contact-card a{color:#087c84!important}
  .social-row{grid-template-columns:repeat(3,1fr)!important}
  .site-footer{background:#fff!important;border-top:1px solid #bbb!important;padding:14px 0!important}
  .footer-row,.footer-row div{display:flex!important;flex-direction:row!important;gap:10px!important;color:#444!important}
  .site-footer a{color:#087c84!important}
  .back-top{display:none!important}
  a[href^="http"]{text-decoration:none}
}