/* ============================================================
   MIRAAI — design system
   navy #0c1733 · deep #070e22 · gold #f3b443 · paper #fafbf6
   DM Serif Display / Source Sans 3 / IBM Plex Mono
   ============================================================ */

:root{
  --navy:#0c1733;
  --deep:#070e22;
  --gold:#f3b443;
  --gold-soft:rgba(243,180,67,.28);
  --paper:#fafbf6;
  --slate:#9aa6c0;          /* muted text on navy */
  --ink:#101a35;            /* text on paper */
  --ink-muted:#5a6378;      /* muted text on paper */
  --hair-light:rgba(243,180,67,.22);
  --hair-dark:rgba(16,26,53,.14);
  --display:"DM Serif Display", Georgia, serif;
  --body:"Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, monospace;
  --wrap:1180px;
  --pad:clamp(20px, 5vw, 56px);
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--body);
  font-size:17px;
  line-height:1.65;
  background:var(--navy);
  color:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img,video{display:block; max-width:100%;}
a{color:inherit;}

.wrap{max-width:var(--wrap); margin:0 auto; padding-inline:var(--pad);}

/* ---------- type ---------- */
h1,h2{font-family:var(--display); font-weight:400; letter-spacing:-.01em;}
h1{font-size:clamp(2.6rem, 6.4vw, 4.6rem); line-height:1.05;}
h2{font-size:clamp(2rem, 4.4vw, 3.2rem); line-height:1.12; max-width:18ch;}
h1 em, h2 em{font-style:italic; color:var(--gold);}
h3{font-family:var(--body); font-weight:600; font-size:1.15rem; letter-spacing:.01em;}

.lede{max-width:62ch; margin-top:1.2rem; font-size:1.13rem; font-weight:300;}
.band--paper .lede{color:var(--ink-muted); font-weight:400;}
.band--navy .lede,.band--deep .lede{color:var(--slate);}

.eyebrow{
  font-family:var(--mono); font-size:.78rem; letter-spacing:.18em;
  text-transform:uppercase; color:var(--gold); margin-bottom:1.1rem;
}
.eyebrow--ink{color:var(--ink);}
.eyebrow--ink .diamond{color:var(--gold);}
.diamond{margin-right:.55em; font-size:.7em; vertical-align:1px;}

.kicker{
  margin-top:3rem; font-size:1.18rem; max-width:54ch;
  padding-left:1.1rem; border-left:3px solid var(--gold);
}
.band--paper .kicker{color:var(--ink);}
.kicker--light{color:var(--paper);}
.fine{font-size:.88rem; color:var(--slate); margin-top:.9rem;
  border-top:1px solid var(--hair-light); padding-top:.9rem;}

/* ---------- bands ---------- */
.band{padding-block:clamp(4.5rem, 10vw, 8rem); position:relative;}
.band--navy{background:var(--navy); color:var(--paper);}
.band--deep{background:var(--deep); color:var(--paper); padding-bottom:0;}
.band--paper{background:var(--paper); color:var(--ink);}
.band--paper h2{color:var(--navy);}

/* ---------- buttons ---------- */
.btn{
  display:inline-block; font-family:var(--body); font-weight:600;
  font-size:.95rem; letter-spacing:.02em; text-decoration:none;
  padding:.78em 1.7em; border-radius:3px; border:1px solid transparent;
  cursor:pointer; transition:transform .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
}
.btn:hover{transform:translateY(-2px);}
.btn--gold{background:var(--gold); color:var(--navy); border-color:var(--gold);}
.btn--gold:hover{background:#ffc763;}
.btn--ghost{background:transparent; color:var(--paper); border-color:rgba(250,251,246,.35);}
.btn--ghost:hover{border-color:var(--gold); color:var(--gold);}
.btn--ink{background:var(--navy); color:var(--paper); border-color:var(--navy);}
.btn--ink:hover{background:#1a2950;}

/* ---------- nav ---------- */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:50;
  display:flex; align-items:center; gap:2rem;
  padding:.8rem var(--pad);
  background:rgba(12,23,51,.82);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--hair-light);
}
.nav__brand img{height:34px; width:auto;}
.nav__links{display:flex; gap:1.6rem; margin-left:auto;}
.nav__links a{
  font-size:.92rem; font-weight:500; text-decoration:none; color:var(--slate);
  transition:color .15s ease;
}
.nav__links a:hover{color:var(--gold);}
.nav__cta{padding:.55em 1.3em;}
.nav__progress{position:absolute; left:0; bottom:-1px; height:2px; width:100%;}
.nav__progress i{display:block; height:100%; width:0; background:var(--gold);}

.nav__burger{display:none; margin-left:auto; background:none; border:0; cursor:pointer; padding:.4rem;}
.nav__burger span{display:block; width:22px; height:2px; background:var(--paper); margin:5px 0; transition:.2s;}
.nav__drawer{
  position:fixed; top:58px; left:0; right:0; z-index:49;
  background:var(--deep); border-bottom:1px solid var(--hair-light);
  display:flex; flex-direction:column; gap:1.1rem; padding:1.6rem var(--pad) 2rem;
}
.nav__drawer[hidden]{display:none;}
.nav__drawer a{text-decoration:none; font-weight:500;}

/* ---------- hero ---------- */
.hero{padding-top:clamp(7rem, 14vh, 10rem); overflow:hidden;}
.hero__inner{position:relative; z-index:2;}
.hero__sub{max-width:56ch; margin-top:1.4rem; font-size:1.18rem; font-weight:300; color:var(--slate);}
.hero__actions{display:flex; flex-wrap:wrap; gap:.9rem; margin-top:2rem;}

.hero__star{
  position:absolute; top:-12%; right:-14%; width:min(58vw, 720px); aspect-ratio:1;
  opacity:.06; z-index:1; pointer-events:none;
}
.hero__star svg{width:100%; height:100%; fill:var(--gold); animation:starSpin 240s linear infinite;}
@keyframes starSpin{to{transform:rotate(360deg);}}

/* phone with video behind transparent screen */
.phone{
  position:relative; margin:4rem auto 0; max-width:920px;
  filter:drop-shadow(0 40px 70px rgba(0,0,0,.55));
  animation:phoneFloat 7s ease-in-out infinite;
}
@keyframes phoneFloat{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-12px);}
}
.phone__device{position:relative;}
.phone__frame{position:relative; z-index:2; width:100%; pointer-events:none;}
.phone__screen{
  position:absolute; z-index:1;
  /* screen cutout rect measured from phone-frame.png alpha */
  left:1.06%; top:2.92%; width:98.21%; height:94.85%;
  /* circular corners that scale with the frame: 93px on a 1484x681 screen */
  border-radius:6.27% / 13.66%;
  overflow:hidden; background:#000;
}
.phone__screen video{width:100%; height:100%; object-fit:cover;}
.phone figcaption{margin-top:1.4rem; justify-content:center;}

.meta{
  display:flex; align-items:center; gap:.9em; flex-wrap:wrap;
  font-family:var(--mono); font-size:.74rem; letter-spacing:.08em;
  text-transform:uppercase; color:var(--slate);
}
.meta__live{display:inline-flex; align-items:center; gap:.5em; color:var(--gold);}
.meta__live i{width:7px; height:7px; border-radius:50%; background:var(--gold); animation:pulse 2s ease-in-out infinite;}
@keyframes pulse{0%,100%{opacity:1;} 50%{opacity:.25;}}
.meta--inline{text-transform:none; letter-spacing:.04em;}

.registry{
  display:flex; gap:2.5rem; flex-wrap:wrap; margin-top:4rem;
  padding-top:1.1rem; border-top:1px solid var(--hair-light);
  font-family:var(--mono); font-size:.72rem; letter-spacing:.12em;
  color:var(--slate);
}
.registry--footer{border:0; margin:0; padding:0; justify-content:center;}

/* ---------- 01 ledger ---------- */
.ledger{margin-top:3.2rem; border-top:1px solid var(--hair-dark);}
.ledger__row{
  display:grid; grid-template-columns:72px 1fr; gap:1.4rem;
  padding:2rem 0; border-bottom:1px solid var(--hair-dark);
}
.ledger__id{
  font-family:var(--display); font-style:italic; font-size:2.4rem;
  color:var(--gold); line-height:1;
}
.ledger__row h3{color:var(--navy); margin-bottom:.4rem; font-size:1.25rem;}
.ledger__row p{color:var(--ink-muted); max-width:68ch;}

/* ---------- 02 pipeline ---------- */
.pipeline{
  margin-top:3.4rem; list-style:none; counter-reset:phase;
  display:grid; grid-template-columns:repeat(5, 1fr); gap:1px;
  background:var(--hair-light); border:1px solid var(--hair-light);
}
.pipeline li{background:var(--navy); padding:1.5rem 1.3rem 1.7rem; position:relative;}
.pipeline li::after{
  content:"→"; position:absolute; right:-9px; top:1.5rem; z-index:2;
  color:var(--gold); font-size:.95rem; background:var(--navy);
  padding:.05em .15em;
}
.pipeline li:last-child::after{content:none;}
.pipeline__phase{
  font-family:var(--mono); font-size:.68rem; letter-spacing:.16em;
  text-transform:uppercase; color:var(--gold);
}
.pipeline h3{margin:.55rem 0 .5rem; font-size:1.02rem;}
.pipeline p{font-size:.88rem; color:var(--slate); line-height:1.55;}

.split{display:grid; grid-template-columns:1fr 1fr; gap:1.6rem; margin-top:2.2rem;}
.trio{display:grid; grid-template-columns:repeat(3,1fr); gap:1.6rem; margin-top:3rem;}
.card{padding:1.8rem; border:1px solid var(--hair-light);}
.card--navy{background:rgba(250,251,246,.025);}
.card h3{color:var(--gold); margin-bottom:.7rem;}
.card p{color:var(--slate); font-size:.97rem;}
.card--paper{background:#fff; border-color:var(--hair-dark);}
.card--paper h3{color:var(--navy);}
.card--paper p{color:var(--ink-muted);}
.trio--paper{margin-top:3rem; margin-bottom:1rem;}
.subhead{
  font-family:var(--display); font-weight:400; font-size:clamp(1.5rem,2.6vw,2rem);
  color:var(--navy); margin-top:4rem;
}
.meta--ink{color:var(--ink-muted);}

/* ---------- 03 studies ---------- */
.studies{margin-top:3rem; border-top:1px solid var(--hair-dark);}
.study{border-bottom:1px solid var(--hair-dark);}
.study summary{
  list-style:none; cursor:pointer; display:flex; align-items:baseline;
  gap:1.4rem; padding:1.35rem .2rem; flex-wrap:wrap;
  transition:background .15s ease;
}
.study summary::-webkit-details-marker{display:none;}
.study summary:hover{background:rgba(12,23,51,.04);}
.study__id{
  font-family:var(--mono); font-size:.75rem; letter-spacing:.1em;
  color:var(--gold); background:var(--navy); padding:.3em .7em;
  border-radius:2px; white-space:nowrap;
}
.study__name{font-family:var(--display); font-size:1.45rem; color:var(--navy);}
.study__tag{
  margin-left:auto; font-family:var(--mono); font-size:.72rem;
  letter-spacing:.12em; text-transform:uppercase; color:var(--ink-muted);
}
.study__body{padding:0 .2rem 1.6rem;}
.study__body p{max-width:72ch; color:var(--ink-muted);}
.study[open] .study__name{color:var(--gold); }
.study[open] summary{background:rgba(12,23,51,.04);}

.invite{
  margin-top:2.8rem; padding:2rem;
  background:var(--navy); color:var(--paper);
  display:flex; align-items:center; gap:2rem; flex-wrap:wrap;
}
.invite p{max-width:56ch; color:var(--slate);}
.invite strong{color:var(--paper);}
.invite .btn{margin-left:auto; background:var(--gold); color:var(--navy); border-color:var(--gold);}
.invite .btn:hover{background:#ffc763;}

/* ---------- 04 triptych ---------- */
.triptych{margin-top:3rem;}
.triptych__controls{
  display:flex; align-items:center; gap:1.4rem; flex-wrap:wrap;
  margin-bottom:1.2rem;
}
.triptych__grid{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--hair-light); border:1px solid var(--hair-light);
}
.triptych__grid figure{background:var(--deep); position:relative;}
.triptych__grid video{width:100%; aspect-ratio:16/9; object-fit:cover; cursor:pointer;}
.triptych__grid figcaption{
  display:flex; align-items:center; gap:.8rem;
  padding:.85rem 1rem; font-size:.88rem; color:var(--slate);
}
.triptych__grid .study__id{background:rgba(243,180,67,.12);}

/* ---------- journey ---------- */
.journey{margin-top:3.4rem; border-top:1px solid var(--hair-light);}
.journey__step{
  display:grid; grid-template-columns:110px 1fr; gap:1.6rem;
  padding:2.3rem 0; border-bottom:1px solid var(--hair-light);
}
.journey__num{
  font-family:var(--display); font-style:italic; font-size:3.4rem;
  color:var(--gold); line-height:1;
}
.journey__stage{
  font-family:var(--mono); font-size:.72rem; letter-spacing:.2em;
  text-transform:uppercase; color:var(--gold); margin-bottom:.35rem;
}
.journey__step h3{
  font-family:var(--display); font-weight:400; font-size:1.7rem;
  color:var(--paper); margin-bottom:.55rem;
}
.journey__step p{color:var(--slate); max-width:72ch;}
.journey__step p.journey__stage{color:var(--gold);}

/* ---------- 05 ecosystem ---------- */
.eco{margin-top:3rem; display:grid; gap:0; border-top:1px solid var(--hair-dark);}
.eco__item{padding:2.1rem 0; border-bottom:1px solid var(--hair-dark);}
.eco__item h3{font-family:var(--display); font-weight:400; font-size:1.7rem; color:var(--navy);}
.eco__sub{font-family:var(--body); font-size:1rem; color:var(--gold); font-style:italic;}
.eco__item p{margin-top:.7rem; max-width:74ch; color:var(--ink-muted);}

/* ---------- 06 team ---------- */
.team{display:grid; grid-template-columns:repeat(3,1fr); gap:2rem; margin-top:3rem;}
.person img{
  width:100%; aspect-ratio:4/5; object-fit:cover;
  border:1px solid var(--hair-light); border-radius:18px;
  filter:saturate(.92);
}
.person h3{margin-top:1.1rem; font-family:var(--display); font-weight:400; font-size:1.4rem;}
.person__role{
  font-family:var(--mono); font-size:.72rem; letter-spacing:.16em;
  text-transform:uppercase; color:var(--gold); margin:.2rem 0 .55rem;
}
.person p{color:var(--slate); font-size:.95rem;}

/* ---------- 07 contact / footer ---------- */
.contact{padding-bottom:clamp(4rem, 8vw, 6rem); text-align:left;}
.footer{border-top:1px solid var(--hair-light); padding:2.6rem 0 2.2rem; background:var(--deep);}
.footer__inner{display:flex; flex-direction:column; align-items:center; gap:1rem; text-align:center;}
.footer__brand{height:30px; width:auto; opacity:.9;}
.footer__note{font-size:.82rem; color:var(--slate); max-width:60ch;}

/* ---------- reveal animation ---------- */
.reveal{opacity:0; transform:translateY(26px); transition:opacity .7s ease, transform .7s ease;}
.reveal.is-in{opacity:1; transform:none;}
.d1{transition-delay:.08s;} .d2{transition-delay:.16s;}
.d3{transition-delay:.24s;} .d4{transition-delay:.32s;}

@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1; transform:none; transition:none;}
  .phone{animation:none;}
  .hero__star svg{animation:none;}
  html{scroll-behavior:auto;}
}

/* ---------- focus ---------- */
a:focus-visible, button:focus-visible, summary:focus-visible{
  outline:2px solid var(--gold); outline-offset:3px;
}

/* ---------- responsive ---------- */
@media (max-width: 980px){
  .pipeline{grid-template-columns:1fr 1fr;}
  .pipeline li::after{content:none;}
  .split,.trio{grid-template-columns:1fr;}
  .team{grid-template-columns:repeat(3,1fr); gap:1.2rem;}
}
@media (max-width: 780px){
  .nav__links,.nav__cta{display:none;}
  .nav__burger{display:block;}
  .nav__burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav__burger.is-open span:nth-child(2){opacity:0;}
  .nav__burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  .triptych__grid{grid-template-columns:1fr;}
  .team{grid-template-columns:1fr; max-width:380px;}
  .pipeline{grid-template-columns:1fr;}
  .ledger__row{grid-template-columns:48px 1fr; gap:1rem;}
  .ledger__id{font-size:1.8rem;}
  .invite .btn{margin-left:0;}
  .study__tag{display:none;}
}

/* journey responsive */
@media (max-width: 780px){
  .journey__step{grid-template-columns:56px 1fr; gap:1rem;}
  .journey__num{font-size:2.2rem;}
}

/* team credential tags */
.person__tags{
  list-style:none; display:flex; flex-wrap:wrap; gap:.45rem;
  margin-top:.9rem; padding:0;
}
.person__tags li{
  font-family:var(--mono); font-size:.66rem; letter-spacing:.06em;
  color:var(--gold); background:rgba(243,180,67,.1);
  border:1px solid rgba(243,180,67,.25);
  padding:.32em .7em; border-radius:2px; white-space:nowrap;
}