/* =========================================================================
   Diver's Gambit — shared stylesheet
   Aesthetic: abyssal teal ground, brass accent, ivory board-light panels.
   Type: Cormorant (display serif) / Hanken Grotesk (body) / Space Mono (data).
   Mobile-first. CSS-only motion. No build step.
   ========================================================================= */

:root{
  /* --- water --- */
  --abyss:#06151c;
  --deep:#0a232e;
  --deep-2:#0e2f3d;
  --current:#13495a;
  --shoal:#1c6171;

  /* --- light --- */
  --ivory:#f3eddd;
  --ivory-2:#e7dcc4;
  --ink:#08161c;
  --ink-soft:#39515b;

  /* --- accents --- */
  --brass:#caa45c;
  --brass-bright:#e8cb84;
  --brass-deep:#9d7d3f;
  --aqua:#74cdd4;

  /* --- derived --- */
  --line:rgba(243,237,221,.14);
  --line-strong:rgba(243,237,221,.26);
  --paper-line:rgba(8,22,28,.12);
  --glow:rgba(116,205,212,.16);

  --maxw:1140px;
  --rad:14px;
  --rad-sm:9px;

  --shadow-1:0 1px 0 rgba(255,255,255,.04) inset, 0 18px 40px -22px rgba(0,0,0,.7);
  --shadow-2:0 30px 70px -32px rgba(0,0,0,.85);

  --serif:"Cormorant Garamond",Georgia,serif;
  --sans:"Hanken Grotesk",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"Space Mono","SFMono-Regular",ui-monospace,monospace;

  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ivory);
  background:var(--abyss);
  line-height:1.6;
  font-size:17px;
  letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

/* ---- ambient water background, fixed behind everything ---- */
body::before{
  content:"";
  position:fixed; inset:0; z-index:-2;
  background:
    radial-gradient(120% 80% at 50% -10%, rgba(116,205,212,.18), transparent 55%),
    radial-gradient(90% 60% at 85% 0%, rgba(202,164,92,.10), transparent 50%),
    linear-gradient(180deg, var(--deep) 0%, var(--abyss) 60%, #041015 100%);
}
/* faint checkerboard + caustic shimmer */
body::after{
  content:"";
  position:fixed; inset:-20% -10% auto -10%; height:120%; z-index:-1;
  pointer-events:none;
  background-image:
    repeating-conic-gradient(rgba(243,237,221,.025) 0% 25%, transparent 0% 50%);
  background-size:74px 74px;
  background-position:center top;
  -webkit-mask-image:linear-gradient(180deg, rgba(0,0,0,.6), transparent 70%);
          mask-image:linear-gradient(180deg, rgba(0,0,0,.6), transparent 70%);
  opacity:.7;
}

/* grain overlay */
.grain{
  position:fixed; inset:0; z-index:0; pointer-events:none; opacity:.05;
  mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.05;letter-spacing:-.01em}
p{margin:0}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:22px;position:relative;z-index:1}
.narrow{max-width:760px}

/* ===================== NAV ===================== */
.site-nav{position:sticky;top:0;z-index:40;
  background:linear-gradient(180deg, rgba(6,21,28,.92), rgba(6,21,28,.66));
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.site-nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding-top:14px;padding-bottom:14px}
.logo{display:inline-flex;align-items:center;gap:11px;text-decoration:none;
  font-family:var(--serif);font-size:23px;font-weight:600;letter-spacing:.005em;color:var(--ivory)}
.logo .mark{width:30px;height:30px;flex:0 0 auto;color:var(--brass-bright)}
.logo b{font-style:italic;color:var(--brass-bright);font-weight:600}
.site-nav nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.site-nav nav a{font-family:var(--sans);font-size:14.5px;font-weight:600;letter-spacing:.02em;
  text-decoration:none;color:var(--ivory);opacity:.78;padding:9px 13px;border-radius:99px;
  transition:opacity .2s, background .2s, color .2s}
.site-nav nav a:hover{opacity:1;background:rgba(243,237,221,.06)}
.site-nav nav a.active{opacity:1;color:var(--brass-bright)}
.site-nav nav a.cta{background:var(--brass);color:#1c1405;opacity:1;
  border:1px solid var(--brass-bright);box-shadow:0 8px 22px -12px rgba(202,164,92,.8)}
.site-nav nav a.cta:hover{background:var(--brass-bright)}

/* ===================== BUTTONS ===================== */
.btn{display:inline-flex;align-items:center;gap:9px;cursor:pointer;
  font-family:var(--sans);font-weight:700;font-size:15px;letter-spacing:.01em;
  padding:13px 22px;border-radius:99px;text-decoration:none;border:1px solid transparent;
  transition:transform .18s var(--ease), background .2s, box-shadow .2s, border-color .2s}
.btn svg{width:17px;height:17px}
.btn-primary{background:var(--brass);color:#1c1405;border-color:var(--brass-bright);
  box-shadow:0 14px 30px -16px rgba(202,164,92,.85)}
.btn-primary:hover{background:var(--brass-bright);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ivory);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--brass);color:var(--brass-bright);transform:translateY(-2px)}

/* ===================== HERO ===================== */
.hero{position:relative;padding:clamp(58px,11vw,128px) 0 clamp(50px,8vw,96px);overflow:hidden}
.hero .wrap{max-width:1000px}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.32em;text-transform:uppercase;
  color:var(--aqua);display:inline-flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--aqua);opacity:.6}

.hero h1{font-family:var(--serif);font-weight:600;
  font-size:clamp(56px,15vw,150px);line-height:.92;margin:.28em 0 0;letter-spacing:-.02em}
.hero h1 em{font-style:italic;color:var(--brass-bright);
  background:linear-gradient(180deg,var(--brass-bright),var(--brass));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero .lede{font-size:clamp(18px,2.4vw,23px);line-height:1.5;max-width:620px;margin-top:26px;
  color:rgba(243,237,221,.86);font-weight:400}
.hero .lede b{color:var(--ivory);font-weight:600}

.hero-cta{display:flex;flex-wrap:wrap;gap:13px;margin-top:34px}

/* drifting king motif */
.king{position:absolute;right:clamp(-30px,2vw,60px);top:clamp(40px,7vw,70px);
  font-size:clamp(150px,30vw,360px);line-height:1;color:var(--brass);
  opacity:.16;pointer-events:none;user-select:none;
  text-shadow:0 0 60px rgba(202,164,92,.5);
  animation:drift 11s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-18px) rotate(1.5deg)}}

/* fact rail */
.facts{display:flex;flex-wrap:wrap;gap:0;margin-top:46px;border-top:1px solid var(--line);
  border-bottom:1px solid var(--line)}
.facts .f{flex:1 1 150px;padding:18px 20px 18px 0;border-right:1px solid var(--line)}
.facts .f:last-child{border-right:0}
.facts .k{font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--aqua);opacity:.85}
.facts .v{font-family:var(--serif);font-size:clamp(22px,3vw,30px);font-weight:600;margin-top:5px;color:var(--ivory)}
.facts .v small{font-family:var(--sans);font-size:13px;font-weight:500;color:var(--ink-soft);color:rgba(243,237,221,.55);letter-spacing:0}

/* ===================== SECTIONS ===================== */
.band{padding:clamp(56px,9vw,108px) 0;position:relative}
.band.tint{background:linear-gradient(180deg, rgba(14,47,61,.55), rgba(10,35,46,.2))}
.band.board{background:
    repeating-conic-gradient(rgba(243,237,221,.018) 0% 25%, transparent 0% 50%) center/74px 74px,
    linear-gradient(180deg, rgba(14,47,61,.4), transparent)}

.sec-head{max-width:680px}
.sec-tag{font-family:var(--mono);font-size:12px;letter-spacing:.28em;text-transform:uppercase;color:var(--brass);display:block;margin-bottom:16px}
.sec{font-family:var(--serif);font-weight:500;font-size:clamp(32px,5.4vw,58px);line-height:1.02;letter-spacing:-.015em}
.sec em{font-style:italic;color:var(--brass-bright)}
.sec-lede{font-size:clamp(17px,2vw,20px);line-height:1.62;color:rgba(243,237,221,.8);margin-top:22px;max-width:660px}
.sec-lede b{color:var(--ivory);font-weight:600}

.lead-quote{font-family:var(--serif);font-style:italic;font-weight:500;
  font-size:clamp(24px,3.6vw,40px);line-height:1.24;color:var(--ivory);max-width:840px;letter-spacing:-.01em}
.lead-quote span{color:var(--brass-bright)}

/* ===================== CARDS / GRID ===================== */
.grid{display:grid;gap:20px;margin-top:46px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}

.card{background:linear-gradient(180deg, rgba(243,237,221,.05), rgba(243,237,221,.02));
  border:1px solid var(--line);border-radius:var(--rad);padding:26px 24px;position:relative;
  transition:transform .25s var(--ease), border-color .25s, background .25s}
.card:hover{transform:translateY(-4px);border-color:var(--brass);
  background:linear-gradient(180deg, rgba(243,237,221,.08), rgba(243,237,221,.03))}
.card .glyph{font-size:30px;line-height:1;color:var(--brass-bright);display:block;margin-bottom:16px}
.card h3{font-family:var(--serif);font-size:25px;font-weight:600;margin-bottom:10px}
.card p{color:rgba(243,237,221,.76);font-size:15.5px;line-height:1.6}
.card .tie{font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;color:var(--aqua);
  margin-top:16px;display:block;text-transform:uppercase}

/* numbered step cards */
.step{counter-increment:step}
.step .num{font-family:var(--mono);font-size:13px;color:var(--brass);letter-spacing:.1em}
.step .num::before{content:counter(step,decimal-leading-zero)}

/* ===================== ivory PANEL (for tables / standards) ===================== */
.panel{background:var(--ivory);color:var(--ink);border-radius:var(--rad);padding:clamp(24px,4vw,40px);
  box-shadow:var(--shadow-2);position:relative;overflow:hidden}
.panel::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-conic-gradient(rgba(8,22,28,.025) 0% 25%, transparent 0% 50%) center/64px 64px;
  -webkit-mask-image:linear-gradient(135deg,#000,transparent 60%);mask-image:linear-gradient(135deg,#000,transparent 60%);opacity:.7}
.panel h3{font-family:var(--serif);color:var(--ink);font-size:26px;margin-bottom:6px}
.panel .sub{color:var(--ink-soft);font-size:14.5px;margin-bottom:20px}

.specs{width:100%;border-collapse:collapse;position:relative;z-index:1}
.specs tr{border-bottom:1px solid var(--paper-line)}
.specs tr:last-child{border-bottom:0}
.specs th{text-align:left;font-family:var(--sans);font-weight:600;color:var(--ink);
  padding:13px 0;font-size:15px;width:42%;vertical-align:top}
.specs td{padding:13px 0;color:var(--ink-soft);font-size:15px;vertical-align:top}
.specs td .mono,.specs td b{color:var(--ink)}
.specs .mono{font-family:var(--mono);font-size:13.5px}

/* ===================== data pills / notation ===================== */
.mono{font-family:var(--mono)}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.pill{font-family:var(--mono);font-size:13px;letter-spacing:.04em;
  border:1px solid var(--line-strong);border-radius:99px;padding:8px 15px;color:rgba(243,237,221,.9)}
.pill b{color:var(--brass-bright)}

/* ===================== signal list ===================== */
.signals{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:34px}
.signal{display:flex;gap:16px;align-items:flex-start;padding:16px 18px;border:1px solid var(--line);
  border-radius:var(--rad-sm);background:rgba(243,237,221,.03)}
.signal .ico{font-size:26px;line-height:1.1;flex:0 0 auto;filter:saturate(.7)}
.signal .t{font-weight:700;font-size:15px}
.signal .d{color:rgba(243,237,221,.7);font-size:14px;margin-top:2px}

/* ===================== the slate board ===================== */
.board-wrap{margin-top:40px;display:flex;flex-direction:column;align-items:center;gap:14px}
.slate{width:min(440px,86vw);border-radius:10px;box-shadow:var(--shadow-2);
  border:6px solid #d9c9a3;background:#d9c9a3}
.board-note{font-family:var(--mono);font-size:12px;letter-spacing:.06em;color:rgba(243,237,221,.6);text-align:center;max-width:440px}

/* ===================== prose ===================== */
.prose h3{font-family:var(--serif);font-size:27px;font-weight:600;margin:34px 0 12px}
.prose p{color:rgba(243,237,221,.82);margin-bottom:16px;font-size:16.5px}
.prose ul{margin:0 0 18px;padding-left:0;list-style:none}
.prose li{position:relative;padding-left:26px;margin-bottom:10px;color:rgba(243,237,221,.82);font-size:16px}
.prose li::before{content:"♦";position:absolute;left:0;top:0;color:var(--brass);font-size:12px}
.prose b{color:var(--ivory)}

/* callout note */
.note{border:1px solid var(--line);border-left:3px solid var(--brass);border-radius:var(--rad-sm);
  background:rgba(243,237,221,.04);padding:18px 20px;color:rgba(243,237,221,.82);font-size:15px;margin-top:24px}
.note.warn{border-left-color:#e0735a}
.note b{color:var(--ivory)}

/* ===================== FORM ===================== */
.form{margin-top:30px;max-width:580px}
.frow{margin-bottom:18px;display:flex;flex-direction:column}
.frow label{font-size:14px;font-weight:600;letter-spacing:.02em;margin-bottom:7px;color:var(--ivory)}
.frow .opt{color:rgba(243,237,221,.5);font-weight:400}
.frow input,.frow textarea{font-family:var(--sans);font-size:16px;color:var(--ivory);
  background:rgba(243,237,221,.05);border:1px solid var(--line-strong);border-radius:var(--rad-sm);
  padding:13px 15px;transition:border-color .2s, background .2s}
.frow input::placeholder,.frow textarea::placeholder{color:rgba(243,237,221,.4)}
.frow input:focus,.frow textarea:focus{outline:none;border-color:var(--brass);background:rgba(243,237,221,.08)}
.frow textarea{min-height:130px;resize:vertical}
.hp{position:absolute;left:-9999px}

/* ===================== FOOTER ===================== */
.site{border-top:1px solid var(--line);padding:54px 0 40px;margin-top:20px;
  background:linear-gradient(180deg, transparent, rgba(4,16,21,.6))}
.ft-top{display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:flex-start}
.ft-brand{font-family:var(--serif);font-size:24px;font-weight:600;display:flex;flex-direction:column}
.ft-brand span{font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--aqua);margin-top:6px;font-weight:400}
.site nav{display:flex;flex-wrap:wrap;gap:18px}
.site nav a{text-decoration:none;color:rgba(243,237,221,.72);font-size:14.5px;font-weight:600}
.site nav a:hover{color:var(--brass-bright)}
.ft-base{margin-top:34px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  font-size:12.5px;color:rgba(243,237,221,.5);line-height:1.55}
.ft-base b{color:rgba(243,237,221,.78)}
.disclaimer{max-width:680px}

/* ===================== motion-in ===================== */
.reveal{opacity:0;transform:translateY(20px);animation:rise .9s var(--ease) forwards}
.d1{animation-delay:.05s}.d2{animation-delay:.16s}.d3{animation-delay:.28s}
.d4{animation-delay:.4s}.d5{animation-delay:.52s}.d6{animation-delay:.64s}
@keyframes rise{to{opacity:1;transform:none}}

/* ===================== RESPONSIVE ===================== */
@media(max-width:880px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  body{font-size:16px}
  .g2,.g3,.g4{grid-template-columns:1fr}
  .signals{grid-template-columns:1fr}
  .site-nav nav a{padding:8px 10px;font-size:13.5px}
  .logo{font-size:20px}
  .facts .f{flex:1 1 45%;padding-right:14px}
  .king{opacity:.1}
}

@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}