/* ============================================================
   ORBIT × Ethereum Foundation — Institutional deck
   Design system (EF-motivated, minimalist, high white space)
   ============================================================ */

:root{
  /* EF-motivated palette */
  --bg: #FAFAF8;
  --ink: #17171A;
  --ink-soft: #4A4A52;
  --ink-faint: #8A8A93;
  --hair: #E6E6E2;
  --purple: #7A5CFF;
  --purple-deep: #5A2EFF;
  --pink: #FF7AC0;
  --magenta: #FB118E;
  --teal: #1FD9C7;
  --gold: #FFBF47;

  /* surfaces */
  --card: #FFFFFF;
  --card-border: 1px solid var(--hair);
  --radius: 18px;
  --shadow: 0 30px 80px -40px rgba(90,46,255,.25);

  /* motion */
  --ease: cubic-bezier(.22,.61,.28,1);
  --dur: .7s;

  --font: "Inter", "SF Pro Display", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*{ box-sizing:border-box; margin:0; padding:0; }
html,body{ height:100%; }
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
  line-height:1.5;
  font-size:16px;
}

/* ---------- Background orbs (brand gradient) ---------- */
.orb{
  position:fixed;
  border-radius:50%;
  filter:blur(90px);
  opacity:.55;
  z-index:0;
  pointer-events:none;
  transition:transform var(--dur) var(--ease);
}
.orb-1{ width:60vmax;height:60vmax; top:-28vmax; right:-18vmax; background:radial-gradient(circle,rgba(122,92,255,.75),transparent 65%); }
.orb-2{ width:48vmax;height:48vmax; bottom:-24vmax; left:-16vmax;  background:radial-gradient(circle,rgba(255,122,192,.7),transparent 65%); }
.orb-3{ width:34vmax;height:34vmax; top:30vh; left:8vw; background:radial-gradient(circle,rgba(31,217,199,.55),transparent 65%); }
body[data-shift="1"] .orb-1{ transform:translate(-4vw,-3vh); }
body[data-shift="1"] .orb-2{ transform:translate(6vw,3vh); }
body[data-shift="1"] .orb-3{ transform:translate(-3vw,5vh); }
body[data-shift="2"] .orb-1{ transform:translate(7vw,-5vh); }
body[data-shift="2"] .orb-2{ transform:translate(-8vw,6vh); }
body[data-shift="2"] .orb-3{ transform:translate(5vw,-4vh); }
body[data-shift="3"] .orb-1{ transform:translate(-6vw,4vh); }
body[data-shift="3"] .orb-2{ transform:translate(5vw,-6vh); }
body[data-shift="3"] .orb-3{ transform:translate(-4vw,-5vh); }

/* thin grid texture */
body::after{
  content:"";
  position:fixed; inset:0; z-index:0; pointer-events:none; opacity:.25;
  background-image:
    linear-gradient(var(--hair) 1px, transparent 1px),
    linear-gradient(90deg, var(--hair) 1px, transparent 1px);
  background-size:48px 48px;
}

/* ---------- Deck ---------- */
.deck{ position:fixed; inset:0; z-index:1; }

.slide{
  position:absolute; inset:0;
  padding: clamp(28px,6vw,84px);
  display:flex; flex-direction:column; justify-content:center;
  opacity:0; visibility:hidden; transform:translateY(24px);
  transition:opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility 0s linear var(--dur);
  overflow:hidden;
}
.slide.is-active{ opacity:1; visibility:visible; transform:none; transition-delay:0s,0s,0s; }
.slide.is-leaving{ transform:translateY(-18px) scale(.995); }

.wrap{ position:relative; max-width:1160px; width:100%; margin:0 auto; padding-bottom:48px; }

/* slide chrome: section tag + number */
.tag{
  display:inline-flex; align-items:center; gap:10px;
  text-transform:uppercase; letter-spacing:.18em; font-size:11px; font-weight:600;
  color:var(--purple); margin-bottom:26px;
}
.tag::before{ content:""; width:34px; height:2px; background:linear-gradient(90deg,var(--purple),var(--pink)); border-radius:2px; }

/* ---------- Type ---------- */
h1{ font-size:clamp(34px,6vw,72px); line-height:1.02; letter-spacing:-.02em; font-weight:700; }
h2{ font-size:clamp(28px,4.6vw,54px); line-height:1.05; letter-spacing:-.02em; font-weight:700; }
h3{ font-size:clamp(18px,2.2vw,26px); font-weight:650; letter-spacing:-.01em; }
.lede{ font-size:clamp(16px,2vw,22px); color:var(--ink-soft); max-width:60ch; margin-top:18px; font-weight:400; }
.grad{ background:linear-gradient(92deg,var(--purple-deep),var(--purple),var(--pink)); -webkit-background-clip:text; background-clip:text; color:transparent; }
.mono{ font-family:"SFMono-Regular",ui-monospace,Menlo,Consolas,monospace; font-size:.9em; letter-spacing:0; }

.max-w{ max-width:inherit !important; }
.center{ text-align:center; }
.center .lede{ margin-left:auto; margin-right:auto; }

/* ---------- Layout helpers ---------- */
.spacer{ flex:1; }
.row{ display:flex; gap:26px; align-items:stretch; margin-top:34px; }
.row.cols-2 > *{ flex:1; }
.row.cols-3 > *{ flex:1; }
@media(max-width:840px){ .row{ flex-direction:column; } }
.stack{ display:flex; flex-direction:column; gap:6px; }
.mt16{ margin-top:16px; } .mt24{ margin-top:24px; } .mt34{ margin-top:34px; }
.small{ font-size:13px; color:var(--ink-faint); }

/* ---------- Cards ---------- */
.card{
  background:var(--card);
  border:var(--card-border);
  border-radius:var(--radius);
  padding:26px 28px;
  box-shadow:0 1px 0 rgba(0,0,0,.02);
  position:relative;
}
.card.accent{ border-left:4px solid var(--purple); }
.card.art{ border-left:4px solid var(--pink); }
.card.eth{ border-left:4px solid var(--purple); }
.card h3{ margin-bottom:8px; }
.card p{ color:var(--ink-soft); font-size:15px; }
.card .num{
  font-size:30px; font-weight:750; letter-spacing:-.02em; margin-bottom:6px;
}
.card .num.grad{ -webkit-background-clip:text; background-clip:text; }

/* ---------- Stat ---------- */
.stat .num{ font-size:clamp(30px,4vw,46px); font-weight:750; letter-spacing:-.02em; line-height:1; }
.stat .lab{ margin-top:8px; color:var(--ink-soft); font-size:14px; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  background:var(--ink); color:var(--bg);
  border:none; border-radius:999px; padding:14px 26px;
  font-family:inherit; font-weight:600; font-size:15px; cursor:pointer;
  transition:transform .25s var(--ease), box-shadow .25s var(--ease), background .25s;
  text-decoration:none;
}
.btn:hover{ transform:translateY(-2px); box-shadow:0 18px 40px -18px rgba(23,23,26,.5); }
.btn.ghost{ background:transparent; color:var(--ink); border:1px solid var(--hair); }
.btn.grad-bg{ background:linear-gradient(92deg,var(--purple-deep),var(--purple),var(--pink)); color:#fff; }

/* ---------- Pill / chip ---------- */
.pill{
  display:inline-flex; align-items:center; gap:8px;
  border:1px solid var(--hair); border-radius:999px; padding:7px 14px;
  font-size:13px; font-weight:600; color:var(--ink-soft); background:rgba(255,255,255,.7);
}
.pill .dot{ width:8px;height:8px;border-radius:50%; }
.dot.purple{ background:var(--purple);} .dot.pink{ background:var(--pink);}
.dot.teal{ background:var(--teal);} .dot.gold{ background:var(--gold);}

/* ---------- Check list ---------- */
.list{ list-style:none; display:flex; flex-direction:column; gap:14px; margin-top:4px; }
.list li{ display:flex; gap:14px; align-items:flex-start; }
.list .tick{ flex:none; width:22px;height:22px;border-radius:50%; margin-top:1px;
  display:grid; place-items:center; font-size:12px; color:#fff; font-weight:700;
  background:linear-gradient(135deg,var(--purple),var(--pink)); }
.list b{ font-weight:650; }
.list span{ color:var(--ink-soft); font-size:15px; }

/* ---------- Navigation chrome ---------- */
.chrome{
  position:fixed; left:0; right:0; bottom:0; z-index:5;
  display:flex; align-items:center; justify-content:space-between; gap:18px;
  padding:16px clamp(20px,4vw,40px);
  background:linear-gradient(180deg, transparent, rgba(250,250,248,.85) 40%);
  backdrop-filter:blur(4px);
}
.chrome .brand{ font-weight:700; letter-spacing:-.01em; font-size:15px; display:flex; gap:16px; align-items:center; }
.chrome .brand .orb-mark{ width:20px;height:20px;border-radius:50%;
  background:linear-gradient(135deg,var(--purple),var(--pink)); box-shadow:0 0 0 4px rgba(122,92,255,.15); }
.controls{ display:flex; align-items:center; gap:12px; }
.navbtn{
  width:42px;height:42px;border-radius:50%; border:1px solid var(--hair);
  background:var(--card); color:var(--ink); cursor:pointer; font-size:16px;
  display:grid; place-items:center; transition:transform .2s var(--ease), border-color .2s;
}
.navbtn:hover{ transform:translateY(-1px); border-color:var(--purple); color:var(--purple); }
.navbtn:disabled{ opacity:.35; cursor:default; transform:none; }
.progress{ width:min(220px,30vw); height:3px; background:var(--hair); border-radius:3px; overflow:hidden; }
.progress i{ display:block; height:100%; width:0%; background:linear-gradient(90deg,var(--purple),var(--pink)); border-radius:3px; transition:width .4s var(--ease); }
.counter{ font-feature-settings:"tnum"; font-size:13px; color:var(--ink-soft); letter-spacing:.05em; font-weight:600; }

/* section tabs (top) */
.tabs{
  position:fixed; top:0; left:0; right:0; z-index:5;
  display:flex; gap:4px; padding:16px clamp(20px,4vw,40px);
  justify-content:center; flex-wrap:wrap;
  background:linear-gradient(180deg, rgba(250,250,248,.9), rgba(250,250,248,0));
}
.tab{
  border:none; background:transparent; cursor:pointer;
  font-family:inherit; font-size:12px; font-weight:600; letter-spacing:.04em; color:var(--ink-faint);
  padding:8px 14px; border-radius:999px; transition:color .2s, background .2s;
}
.tab:hover{ color:var(--ink); }
.tab.is-active{ background:rgba(122,92,255,.12); color:var(--purple); }

/* ---------- Footnotes / subtle ---------- */
.foot{ margin-top:40px; font-size:12.5px; color:var(--ink-faint); max-width:70ch; }

/* ============================================================
   COMPONENTS: diagrams
   ============================================================ */

/* Node anatomy (one node) */
.node{
  display:grid; gap:14px; margin-top:8px;
}
.node .row-of{ display:flex; gap:14px; justify-content:center; }
.screen{
  border-radius:12px; aspect-ratio:5/4; display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:6px;
  border:1px solid rgba(0,0,0,.08); position:relative; overflow:hidden;
  box-shadow:0 14px 30px -18px rgba(0,0,0,.4);
}
.screen::after{ content:""; position:absolute; inset:0;
  background:linear-gradient(160deg, rgba(255,255,255,.28), transparent 60%); pointer-events:none; }
.screen .lab{ font-size:11px; font-weight:650; letter-spacing:.02em; color:rgba(255,255,255,.92); }
.screen .sub{ font-size:10px; color:rgba(255,255,255,.7); }
.screen.art{ background:linear-gradient(140deg,#8a6bff,#fb118e); }
.screen.text{ background:linear-gradient(140deg,#17171a,#3b3b46); color:#fff; }
.screen .glyph{ font-size:20px; line-height:1; }

/* ===== Master diagram (Miro-style flow) ===== */
.flow{ max-width:940px; margin:34px auto 0; }
.flow .hub{
  display:inline-flex; flex-direction:column; align-items:center; gap:2px;
  padding:12px 30px; border-radius:16px; background:var(--ink); color:#fff;
  font-weight:750; letter-spacing:.02em; font-size:17px; text-align:center;
}
.flow .hub .hsub{ font-weight:500; font-size:12px; opacity:.7; letter-spacing:.04em; }

.flow .connr{
  position:relative; width:60%; height:34px; margin:0 auto;
}
.flow .connr .arm{ position:absolute; bottom:0; width:2px; height:48%; background:var(--ink); opacity:.35; }
.flow .connr .arm-l{ left:calc(50% - 12px); }
.flow .connr .arm-r{ right:calc(50% - 12px); }
.flow .connr::before{ content:""; position:absolute; left:50%; top:0; bottom:0; width:2px;
  transform:translateX(-50%); background:var(--ink); opacity:.35; }

.flow .deckrow{ display:flex; gap:22px; align-items:stretch; }
@media(max-width:900px){ .flow .deckrow{ flex-direction:column; } }

.flow .trackcard{
  flex:1; min-width:0; border:1px solid var(--hair); border-radius:var(--radius);
  background:var(--card); padding:18px 20px 8px; box-shadow:0 1px 0 rgba(0,0,0,.02);
}
.flow .theader{ display:flex; align-items:baseline; justify-content:space-between;
  padding-bottom:10px; border-bottom:2px solid var(--hair); }
.flow .theader .trk{ font-weight:750; letter-spacing:.06em; text-transform:uppercase; font-size:12.5px; color:var(--ink); }
.flow .theader .cnt{ font-size:26px; font-weight:800; letter-spacing:-.02em; }
.flow .tsub{ margin:10px 0 4px; font-size:13px; color:var(--ink-faint); }

.flow .nrow{ display:flex; align-items:center; gap:12px; padding:11px 0; border-bottom:1px dashed var(--hair); }
.flow .nrow:last-child{ border-bottom:none; }
.flow .nlab{
  flex:none; width:40px; height:28px; border-radius:8px; display:grid; place-items:center;
  font-weight:750; font-size:12px; color:#fff; letter-spacing:.02em;
  background:linear-gradient(135deg,var(--purple-deep),var(--purple));
}
.flow .nlab.hub2{ background:linear-gradient(135deg,var(--purple),var(--pink)); }
.flow .nname{ flex:1; min-width:0; font-size:13.5px; color:var(--ink-soft); font-weight:500; }
.flow .nscr{ display:flex; gap:5px; flex:none; flex-wrap:wrap; }
.flow .chip{
  width:24px; height:24px; border-radius:6px; display:inline-block;
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.10);
}
.flow .chip.art{ background:linear-gradient(140deg,#8a6bff,#fb118e); }
.flow .chip.text{ background:linear-gradient(140deg,#17171a,#55555f); }

/* legend */
.legendm{ display:flex; gap:22px; flex-wrap:wrap; margin:22px 2px 0; }
.legendm .l{ display:flex; align-items:center; gap:8px; font-size:13px; color:var(--ink-soft); }
.legendm .chip{ width:18px; height:18px; border-radius:5px; }

/* ---------- Master diagram slide layout tweak ---------- */
.slide.diagram .wrap{ padding-bottom:6px; }

/* ---------- Small screen fallback ---------- */
@media(prefers-reduced-motion:reduce){
  *{ transition:none !important; animation:none !important; }
}