/* The iceberg front page. One dark world; it never follows the light theme. */
:root{color-scheme:dark;--ink:#E6EEEE;--mute:#9DB2B3;--dim:#6C8586;--glow:#8FD0C8;--line:rgba(143,208,200,.22);
  --serif:"Instrument Serif",Georgia,serif;--sans:"Instrument Sans",system-ui,sans-serif}
*{box-sizing:border-box}
html{background:#0b1d24}
body.berg-page{margin:0;background:#0b1d24;color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--glow);outline-offset:3px;border-radius:2px}

header.top{position:fixed;inset:0 0 auto 0;z-index:30;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:calc(env(safe-area-inset-top,0px) + 18px) clamp(16px,4vw,56px) 18px;pointer-events:none}
header.top > *{pointer-events:auto}
.brand{font-family:var(--serif);font-size:28px;letter-spacing:-.01em}
header nav{display:flex;gap:clamp(14px,2.6vw,32px);font-size:15px;font-weight:500;color:var(--mute)}
header nav a:hover{color:var(--ink)}
header.top .search{margin-left:auto;display:flex;align-items:center;gap:8px;width:min(300px,30vw);padding:0 14px;min-height:40px;
  border:1px solid var(--line);border-radius:999px;background:rgba(5,16,20,.45);color:var(--mute);
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
header.top .search:focus-within{border-color:var(--glow);color:var(--ink)}
header.top .search input{flex:1;min-width:0;border:0;background:none;color:var(--ink);font:inherit;font-size:15px;outline:none}
header.top .search input::placeholder{color:var(--dim)}
.search-link{display:none}

#scene{position:fixed;inset:0;width:100vw;height:100vh;height:100lvh;display:block;z-index:0}
#tags{position:fixed;inset:0;z-index:5;pointer-events:none;overflow:hidden}
.tag{position:absolute;left:0;top:0;display:flex;align-items:center;gap:8px;white-space:nowrap;pointer-events:auto;
  font:italic 400 17px/1.1 var(--serif);letter-spacing:.005em;color:var(--ink);opacity:0;will-change:transform,opacity;
  text-shadow:0 1px 10px rgba(0,0,0,.85)}
.tag i{width:34px;height:1px;background:linear-gradient(90deg,rgba(230,238,238,.9),rgba(230,238,238,.1));flex:none}
.tag:hover span,.tag.hot span{color:var(--glow)}

.hud{position:fixed;z-index:20;left:clamp(16px,4vw,56px);bottom:calc(env(safe-area-inset-bottom,0px) + clamp(20px,5vh,48px));
  display:flex;flex-direction:column;gap:2px;pointer-events:none}
.hud b{font-family:var(--serif);font-weight:400;font-size:clamp(40px,5.6vw,76px);line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.hud span{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute)}

/* The scroll track sits over the berg's tags: let clicks through it, except on the panels. */
main#dive{position:relative;z-index:10;pointer-events:none}
main#dive .panel{pointer-events:auto}
.step{min-height:100vh;display:flex;align-items:center;padding:120px clamp(16px,4vw,56px)}
.step.band{min-height:150vh;justify-content:flex-end}
.intro{align-items:flex-start;padding-top:calc(env(safe-area-inset-top,0px) + 22vh)}
.intro-copy{max-width:620px}
.intro h1{margin:0;font-family:var(--serif);font-weight:400;font-size:clamp(48px,7.2vw,104px);line-height:.96;letter-spacing:-.02em;text-wrap:balance}
.intro h1 .w{display:inline-block;overflow:hidden;vertical-align:top;padding-bottom:.08em}
.intro h1 .w > span{display:inline-block}
.intro p{margin:22px 0 0;max-width:46ch;font-size:18px;color:#C4D3D3}
.cue{margin-top:30px;display:flex;align-items:center;gap:12px;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--glow)}
.cue i{display:block;width:1px;height:34px;background:var(--glow);transform-origin:top;animation:cue 2s ease-in-out infinite}
@keyframes cue{0%{transform:scaleY(0)}45%{transform:scaleY(1);transform-origin:top}55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

.panel{width:min(380px,100%);padding:26px 26px 22px;border:1px solid var(--line);border-radius:6px;
  background:rgba(5,16,20,.5);backdrop-filter:blur(10px) saturate(1.2);-webkit-backdrop-filter:blur(10px) saturate(1.2)}
.panel .k{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--mute)}
.panel h2{margin:6px 0 0;font-family:var(--serif);font-weight:400;font-size:clamp(40px,4.4vw,58px);line-height:1}
.panel p{margin:10px 0 0;color:var(--mute);font-size:15px}
.panel ol{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:2px;border-top:1px solid var(--line)}
.panel li a{display:block;padding:8px 0;border-bottom:1px solid rgba(143,208,200,.1);font-size:15px}
.panel li a:hover,.panel li a.hot{color:var(--glow)}
.panel.end{text-align:left}
.btn{display:inline-flex;align-items:center;min-height:44px;margin-top:20px;padding:12px 20px;border-radius:999px;background:var(--glow);color:#051014;font-weight:600;font-size:15px}
.outro{justify-content:center}
.panel .more{margin-top:18px;font-size:14px}.panel .more a{color:var(--glow);text-decoration:underline;text-underline-offset:3px}

/* Without WebGL the scene never draws: give the page a depth gradient instead. */
.no-webgl body.berg-page,body.berg-page.no-webgl{background:linear-gradient(#1b3a44 0%,#0c2129 30%,#061318 65%,#020607 100%)}
.no-webgl .hud,.no-webgl #tags{display:none}
.no-webgl .step.band{min-height:auto;justify-content:flex-start}

@media (max-width:900px){
  header nav a:not(.search-link):not(.keep){display:none}
  header.top .search{display:none}
  .search-link{display:inline-flex;align-items:center}
  .step.band{align-items:flex-end;padding-bottom:18vh}
  .panel{width:100%}
  .tag{font-size:15px}
  .tag i{width:22px}
  .hud{bottom:calc(env(safe-area-inset-bottom,0px) + 12px)}
  .hud b{font-size:34px}
}
@media (prefers-reduced-motion:reduce){.cue i{animation:none;transform:none}}