/* ============================================================
   TESSERA — Cover Collection for Ring Intercom
   Premium industrial sci-fi launch site
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@200;300;400;500;600;700;800&family=Space+Mono:wght@400;700&display=swap');

:root{
  color-scheme:dark;
  /* surfaces */
  --void:#0f1012;
  --void-2:#141518;
  --ink:#0a0a0c;
  --line:rgba(255,255,255,.10);
  --line-2:rgba(255,255,255,.06);

  /* type */
  --text:#f3f2ef;
  --muted:#9ea0a4;
  --faint:#6a6c70;

  /* accents (oklch — matched chroma/lightness, varied hue) */
  --gold:oklch(0.83 0.075 84);
  --gold-soft:oklch(0.83 0.075 84 / .14);
  --ice:oklch(0.85 0.06 232);
  --ice-soft:oklch(0.85 0.06 232 / .12);

  /* glass */
  --glass:rgba(255,255,255,.045);
  --glass-2:rgba(255,255,255,.07);
  --glass-brd:rgba(255,255,255,.12);
  --glass-hi:rgba(255,255,255,.30);

  --backdrop-glow:rgba(255,255,255,.05);
  --backdrop-a:#16171a;
  --backdrop-b:#0f1012;
  --backdrop-c:#0b0b0d;
  --opaque-a:#17181b;
  --opaque-b:#0d0e10;
  --nav-bg:rgba(12,13,15,.6);
  --panel-solid:rgba(10,11,13,.88);
  --macro-overlay-a:rgba(10,10,12,.15);
  --macro-overlay-b:rgba(10,10,12,.55);
  --frame-index-bg:rgba(0,0,0,.35);
  --footer-bg:var(--ink);
  --grid-line:rgba(255,255,255,.025);
  --outline-soft:rgba(255,255,255,.16);
  --outline-strong:rgba(255,255,255,.28);
  --field-bg:rgba(255,255,255,.06);
  --field-brd:rgba(255,255,255,.1);
  --field-focus:rgba(255,255,255,.35);
  --focus-ring:rgba(255,255,255,.04);
  --success:#6fcf8a;

  --font:'Sora',system-ui,sans-serif;
  --mono:'Space Mono',ui-monospace,monospace;

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

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:auto;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--void);
  overflow-x:hidden;
  line-height:1.5;
  cursor:default;
}
body.dragging{cursor:grabbing}

/* ---- ambient backdrop ---- */
.backdrop{position:fixed;inset:0;z-index:0;pointer-events:none}
.backdrop::before{ /* vignette + glow */
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(120% 90% at 50% 8%, var(--backdrop-glow), transparent 55%),
    radial-gradient(80% 60% at 50% 42%, var(--ice-soft), transparent 60%),
    linear-gradient(180deg,var(--backdrop-a) 0%, var(--backdrop-b) 38%, var(--backdrop-c) 100%);
}
.backdrop::after{ /* hud grid */
  content:"";position:absolute;inset:0;opacity:.5;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(120% 100% at 50% 30%, #000 30%, transparent 78%);
          mask-image:radial-gradient(120% 100% at 50% 30%, #000 30%, transparent 78%);
}
.grain{position:fixed;inset:0;z-index:60;pointer-events:none;opacity:.045;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='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}

/* ---- 3D canvas ---- */
#bg-canvas{position:fixed;inset:0;width:100vw;height:100vh;z-index:2;display:block;
  transition:opacity .6s var(--ease);touch-action:none}
#bg-canvas.grab{cursor:grab}

/* content sits above canvas */
.page{position:relative;z-index:3}
section{position:relative}

/* let drags reach the 3D canvas through transparent acts */
.hero,.manifesto,.reserve{pointer-events:none}
.hero a,.hero .chip,.hero .float-chip,.scrollcue,
.manifesto .chip,.manifesto a,
.reserve .res-panel,.reserve a,.reserve .btn,.reserve .opt{pointer-events:auto}

/* opaque sections that hide the canvas behind them */
.opaque{background:
    radial-gradient(100% 80% at 50% 0%, var(--opaque-a), var(--opaque-b) 70%);
  z-index:4}

/* ============================================================
   GLASS PRIMITIVES
   ============================================================ */
.glass{
  background:linear-gradient(180deg, var(--glass-2), var(--glass));
  border:1px solid var(--glass-brd);
  -webkit-backdrop-filter:blur(22px) saturate(1.4);
          backdrop-filter:blur(22px) saturate(1.4);
  box-shadow:0 1px 0 var(--glass-hi) inset, 0 24px 60px -28px rgba(0,0,0,.7);
  border-radius:18px;
}
.chip{
  display:inline-flex;align-items:center;gap:.55rem;
  padding:.5rem .85rem;border-radius:100px;
  background:var(--glass);border:1px solid var(--glass-brd);
  -webkit-backdrop-filter:blur(16px) saturate(1.3);backdrop-filter:blur(16px) saturate(1.3);
  font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);box-shadow:0 1px 0 var(--glass-hi) inset;
  white-space:nowrap;
}
.chip .dot{width:6px;height:6px;border-radius:50%;background:var(--gold);
  box-shadow:0 0 10px 1px var(--gold)}
.chip .dot.ice{background:var(--ice);box-shadow:0 0 10px 1px var(--ice)}

.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.34em;
  text-transform:uppercase;color:var(--gold)}
.label{font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--faint)}

/* ============================================================
   TYPE SCALE
   ============================================================ */
.display{font-weight:700;line-height:.92;letter-spacing:-.03em;
  font-size:clamp(2.6rem,8.4vw,8.4rem)}
.mega{font-weight:700;line-height:.9;letter-spacing:-.035em;
  font-size:clamp(3rem,13vw,13.5rem)}
.h2{font-weight:600;line-height:1.0;letter-spacing:-.025em;
  font-size:clamp(2rem,5.4vw,4.4rem)}
.lede{font-weight:300;font-size:clamp(1.05rem,1.7vw,1.5rem);color:var(--muted);
  line-height:1.55;max-width:46ch}
.outline{color:transparent;-webkit-text-stroke:1.2px var(--outline-soft)}

/* ============================================================
   NAV
   ============================================================ */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:1.05rem clamp(1.1rem,3.4vw,2.6rem);
  transition:background .4s var(--ease),border-color .4s var(--ease);
  border-bottom:1px solid transparent}
.nav.scrolled{background:var(--nav-bg);
  -webkit-backdrop-filter:blur(18px) saturate(1.3);backdrop-filter:blur(18px) saturate(1.3);
  border-bottom:1px solid var(--line-2)}
.brand{display:flex;align-items:center;gap:.8rem;font-weight:700;letter-spacing:.36em;
  font-size:.95rem;padding-left:.36em}
.brand-word{display:block}
.tessera-mark{
  width:18px;height:18px;display:grid;grid-template-columns:repeat(2,1fr);grid-template-rows:repeat(2,1fr);
  gap:2px;flex:0 0 auto;
}
.tessera-mark .tile{
  display:block;border-radius:2px;background:var(--text);opacity:.16;transition:transform .25s var(--ease),opacity .25s var(--ease),background .25s var(--ease);
}
.tessera-mark .tile.tl,.tessera-mark .tile.tr,.tessera-mark .tile.bl{background:var(--text);opacity:.18}
.tessera-mark .tile.tilt{
  background:var(--gold);
  opacity:1;
  transform:rotate(18deg) scale(.9);
  transform-origin:50% 50%;
  box-shadow:0 0 0 1px color-mix(in srgb, var(--gold) 34%, transparent);
}
.nav-links{display:flex;align-items:center;gap:2rem}
.nav-tools{display:flex;align-items:center;gap:.55rem}
.nav-links a{color:var(--muted);text-decoration:none;font-size:.78rem;letter-spacing:.04em;
  transition:color .25s}
.nav-links a:hover{color:var(--text)}
.nav-cta{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;
  color:var(--text);padding:.62rem 1.1rem;border:1px solid var(--glass-brd);border-radius:100px;
  background:var(--glass);transition:.25s}
.nav-cta:hover{background:var(--gold-soft);border-color:var(--gold)}
@media(max-width:860px){.nav-links a:not(.nav-cta){display:none}}
@media(max-width:560px){
  .nav-links{gap:.7rem}
  .nav-tools{gap:.4rem}
  .theme-opt{padding:.42rem .58rem}
}

/* ============================================================
   HERO
   ============================================================ */
.hero{height:100svh;min-height:680px;display:flex;flex-direction:column;
  justify-content:space-between;padding:clamp(5rem,9vh,7rem) clamp(1.1rem,3.4vw,2.6rem) 2rem}
.hero-top{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem}
.hero-center{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none}
.hero-wordmark{font-weight:800;letter-spacing:-.04em;line-height:.8;
  font-size:clamp(5rem,24vw,24rem);white-space:nowrap;opacity:.9}
.hero-bottom{display:flex;justify-content:space-between;align-items:flex-end;gap:1.4rem;flex-wrap:wrap}
.hero-tag{max-width:min(42rem,68vw);position:relative;z-index:2}
.go-tilt{
  display:inline-flex;align-items:flex-end;gap:.08em;
  font-weight:800;line-height:.92;letter-spacing:-.05em;
  font-size:clamp(3.8rem,9vw,7.4rem);
  color:var(--text);
  margin-bottom:1rem;
  white-space:nowrap;
}
.tilt-dot{
  display:inline-block;
  width:.13em;height:.13em;margin-left:.015em;
  border-radius:2px;background:var(--gold);
  transform:rotate(18deg);
  vertical-align:baseline;
  box-shadow:0 0 .45em color-mix(in srgb, var(--gold) 30%, transparent);
}
.go-tilt .tilt-dot{
  flex:0 0 auto;
  width:.16em;height:.16em;
  margin:0 0 .05em -.01em;
}
.hero-tag h1{font-weight:300;font-size:clamp(1.15rem,2vw,1.7rem);line-height:1.3;letter-spacing:-.01em}
.hero-tag h1 b{font-weight:600;color:var(--text)}
@media(max-width:760px){
  .hero-tag{max-width:100%}
  .go-tilt{font-size:clamp(2.9rem,15vw,4.8rem);margin-bottom:.75rem}
}
.scrollcue{display:flex;align-items:center;gap:.7rem;color:var(--faint);
  font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;text-transform:uppercase}
.scrollcue .bar{width:38px;height:1px;background:linear-gradient(90deg,var(--gold),transparent);position:relative;overflow:hidden}
.scrollcue .bar::after{content:"";position:absolute;inset:0;width:12px;background:var(--gold);
  animation:scan 2.2s var(--ease) infinite}
@keyframes scan{0%{transform:translateX(-14px)}100%{transform:translateX(40px)}}

.hero-floats{position:absolute;inset:0;pointer-events:none}
.float-chip{position:absolute;pointer-events:auto}
.float-chip.a{top:34%;left:clamp(1.1rem,4vw,4rem)}
.float-chip.b{top:46%;right:clamp(1.1rem,4vw,4rem)}
.float-chip.c{bottom:16%;right:clamp(1.1rem,8vw,9rem);left:auto}
@media(max-width:760px){.float-chip{display:none}}

/* ============================================================
   GENERIC SECTION SHELL
   ============================================================ */
.wrap{max-width:1320px;margin:0 auto;padding:0 clamp(1.1rem,3.4vw,2.6rem)}
.pad{padding-block:clamp(6rem,14vh,12rem)}
.sec-head{display:flex;align-items:baseline;gap:1rem;margin-bottom:2.4rem}
.sec-no{font-family:var(--mono);font-size:.72rem;color:var(--gold);letter-spacing:.1em}

/* MANIFESTO */
.manifesto{min-height:150svh;display:flex;align-items:center}
.manifesto .wrap{width:100%}
.manifesto-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:2rem;align-items:center}
.statement{font-weight:300;font-size:clamp(1.8rem,4.2vw,3.5rem);line-height:1.18;letter-spacing:-.02em;
  max-width:18ch}
.statement .w{display:inline-block;opacity:.16;transition:opacity .5s var(--ease)}
.statement .w.lit{opacity:1}
.statement em{font-style:normal;color:var(--gold)}
.manifesto-meta{display:flex;flex-direction:column;gap:1rem;justify-self:end;max-width:34ch}
@media(max-width:860px){.manifesto-grid{grid-template-columns:minmax(0,1fr)}.manifesto-meta{display:none}}

/* OBJECT / MACRO */
.macro{position:relative;overflow:hidden}
.macro-figure{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--glass-brd);
  box-shadow:0 50px 120px -50px #000}
.macro-figure img{display:block;width:100%;height:clamp(420px,78vh,860px);object-fit:cover;
  transform:scale(1.08);will-change:transform}
.macro-figure::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,var(--macro-overlay-a),var(--macro-overlay-b))}
.callout{position:absolute;z-index:3;max-width:230px}
.callout .ln{height:1px;background:linear-gradient(90deg,var(--gold),transparent);margin-bottom:.7rem;
  box-shadow:0 0 8px var(--gold-soft)}
.callout .k{font-family:var(--mono);font-size:.62rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gold);margin-bottom:.3rem}
.callout .v{font-size:.92rem;color:var(--text);line-height:1.4}
.callout.c1{top:14%;left:6%}
.callout.c2{top:40%;right:6%;text-align:right}
.callout.c2 .ln{background:linear-gradient(270deg,var(--gold),transparent)}
.callout.c3{bottom:12%;left:9%}
@media(max-width:760px){.callout{position:static;max-width:none;margin-top:1rem;display:inline-block}
  .macro-callouts{display:flex;flex-wrap:wrap;gap:1.4rem;margin-top:1.6rem}
  .macro-figure{margin-bottom:0}}

/* feature strip */
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-2);
  border:1px solid var(--line-2);border-radius:16px;overflow:hidden;margin-top:2.2rem}
.feat{background:var(--void);padding:1.6rem 1.4rem;min-height:200px;display:flex;flex-direction:column;
  justify-content:space-between;transition:background .3s}
.feat:hover{background:var(--void-2)}
.feat .n{font-family:var(--mono);font-size:.66rem;color:var(--faint);letter-spacing:.12em}
.feat h4{font-weight:500;font-size:1.18rem;margin-bottom:.5rem}
.feat p{font-size:.86rem;color:var(--muted);line-height:1.5}
@media(max-width:860px){.feat-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.feat-grid{grid-template-columns:1fr}}

/* ============================================================
   ENGINEERING / SPEC HUD
   ============================================================ */
.eng-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.4rem,3vw,3rem);align-items:center}
@media(max-width:920px){.eng-grid{grid-template-columns:minmax(0,1fr)}}
.blueprint{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--glass-brd);
  background:
    radial-gradient(120% 100% at 30% 20%, rgba(255,255,255,.05), transparent 60%),
    repeating-linear-gradient(0deg,transparent 0 31px,rgba(255,255,255,.04) 31px 32px),
    repeating-linear-gradient(90deg,transparent 0 31px,rgba(255,255,255,.04) 31px 32px),
    #0c0d0f;
  padding:4.5rem 2rem 5rem;min-height:480px;display:flex;align-items:center;justify-content:center}
.blueprint img{display:block;position:relative;z-index:1;width:68%;max-width:420px;height:auto;object-fit:contain;
  transform:translateY(18px);filter:drop-shadow(0 34px 56px rgba(0,0,0,.44))}
.bp-tag{position:absolute;font-family:var(--mono);font-size:.6rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ice);display:flex;align-items:center;gap:.5rem;z-index:3;
  padding:.45rem .7rem;border-radius:999px;background:rgba(8,10,12,.78);border:1px solid rgba(255,255,255,.08)}
.bp-tag::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--ice);box-shadow:0 0 8px var(--ice)}
.bp-tag.t1{top:1.4rem;left:1.4rem}
.bp-tag.t2{bottom:1.4rem;right:1.4rem}

.specs{display:flex;flex-direction:column;gap:0}
.spec-row{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;
  padding:1.1rem 0;border-bottom:1px solid var(--line-2)}
.spec-row .k{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.spec-row .v{font-weight:500;font-size:1.05rem;text-align:right}
.spec-row .v .u{color:var(--faint);font-weight:400;font-size:.8rem;margin-left:.2rem}

.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-2);
  border:1px solid var(--line-2);border-radius:16px;overflow:hidden;margin-top:2.4rem}
.stat{background:var(--void);padding:1.7rem 1.4rem}
.stat .num{font-weight:700;font-size:clamp(1.8rem,3.4vw,2.8rem);letter-spacing:-.02em;line-height:1}
.stat .num small{font-size:1rem;color:var(--gold);font-weight:500;margin-left:.15rem}
.stat .cap{font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;
  color:var(--faint);margin-top:.6rem}
@media(max-width:560px){.stat-row{grid-template-columns:1fr}}

/* install steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin-top:2.4rem}
.step{padding:1.6rem;border-radius:16px}
.step .si{font-family:var(--mono);color:var(--gold);font-size:.8rem;letter-spacing:.1em}
.step h5{font-weight:500;font-size:1.1rem;margin:.9rem 0 .4rem}
.step p{font-size:.86rem;color:var(--muted);line-height:1.5}
@media(max-width:760px){.steps{grid-template-columns:1fr}}

/* ============================================================
   COLLECTION
   ============================================================ */
.collection .wrap{width:100%}
.coll-stage{display:grid;grid-template-columns:1fr 1.05fr;gap:clamp(1.5rem,4vw,4rem);align-items:center}
@media(max-width:920px){.coll-stage{grid-template-columns:minmax(0,1fr)}}
.coll-frame{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--glass-brd);
  box-shadow:0 50px 120px -50px #000;aspect-ratio:1/1}
.coll-frame img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:0;transition:opacity .7s var(--ease),transform 1.1s var(--ease);transform:scale(1.06)}
.coll-frame img.active{opacity:1;transform:scale(1)}
.coll-frame .fr-hud{position:absolute;left:1rem;top:1rem;z-index:2}
.coll-frame .fr-idx{position:absolute;right:1rem;bottom:1rem;z-index:2;font-family:var(--mono);
  font-size:.66rem;letter-spacing:.14em;color:var(--text);
  background:var(--frame-index-bg);padding:.4rem .7rem;border-radius:100px;border:1px solid var(--glass-brd);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}

.coll-info .cname{font-weight:700;font-size:clamp(2.6rem,6vw,5rem);letter-spacing:-.02em;line-height:1;
  display:flex;align-items:baseline;gap:.8rem}
.coll-info .csub{font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold);margin:1rem 0 .9rem}
.coll-info .cdesc{color:var(--muted);max-width:42ch;line-height:1.6;font-weight:300;font-size:1.05rem}
.coll-meta{display:flex;gap:2.2rem;margin-top:1.8rem}
.coll-meta div .k{font-family:var(--mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.coll-meta div .v{font-size:1rem;margin-top:.25rem}

.city-tabs{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:2.6rem}
.city-tab{font-family:var(--mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;
  padding:.7rem 1.05rem;border-radius:100px;border:1px solid var(--glass-brd);background:var(--glass);
  color:var(--muted);cursor:pointer;transition:.25s;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
.city-tab:hover{color:var(--text);border-color:var(--glass-hi)}
.city-tab.active{color:var(--ink);background:var(--gold);border-color:var(--gold);font-weight:700}

/* FINISHES */
.fin-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
@media(max-width:760px){.fin-grid{grid-template-columns:1fr}}
.fin{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--glass-brd);min-height:360px;
  display:flex;flex-direction:column;justify-content:flex-end}
.fin img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.fin .ov{position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(8,8,10,.85))}
.fin .body{position:relative;padding:1.8rem}
.fin .body h4{font-weight:600;font-size:1.5rem;letter-spacing:-.01em}
.fin .body p{color:var(--muted);font-size:.9rem;margin-top:.4rem;max-width:32ch;line-height:1.5}

/* ============================================================
   RESERVE
   ============================================================ */
.reserve{min-height:120svh;display:flex;align-items:center}
.reserve .wrap{width:100%}
.reserve-grid{display:grid;grid-template-columns:1fr .8fr;gap:3rem;align-items:center}
@media(max-width:920px){.reserve-grid{grid-template-columns:minmax(0,1fr)}}
.res-panel{
  padding:clamp(1.6rem,3vw,2.4rem);
  background:linear-gradient(180deg, rgba(18,20,24,.9), rgba(10,11,13,.84));
  border:1px solid rgba(255,255,255,.14);
  -webkit-backdrop-filter:blur(28px) saturate(1.2);
          backdrop-filter:blur(28px) saturate(1.2);
  box-shadow:0 1px 0 rgba(255,255,255,.16) inset, 0 28px 72px -36px rgba(0,0,0,.92);
}
.res-row{display:flex;flex-direction:column;gap:.7rem;padding:1.1rem 0;border-bottom:1px solid var(--line-2)}
.res-row:first-child{padding-top:0}
.opt-row{display:flex;gap:.5rem;flex-wrap:wrap}
.opt{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;
  padding:.55rem .9rem;border-radius:10px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.075);
  color:rgba(248,245,240,.84);cursor:pointer;transition:.2s}
.opt:hover{color:var(--text)}
.opt.active{background:var(--text);color:var(--ink);border-color:var(--text);font-weight:700}
.price{display:flex;align-items:baseline;gap:.6rem;margin:1.4rem 0}
.price .big{font-weight:700;font-size:clamp(2.2rem,5vw,3.4rem);letter-spacing:-.02em}
.price .note{color:var(--faint);font-size:.82rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.7rem;width:100%;
  padding:1.05rem 1.4rem;border-radius:12px;border:none;cursor:pointer;
  background:var(--gold);color:var(--ink);font-family:var(--font);font-weight:700;font-size:.95rem;
  letter-spacing:.02em;transition:.25s;box-shadow:0 14px 40px -16px var(--gold)}
.btn:hover{transform:translateY(-2px);filter:brightness(1.06)}
.btn .ar{transition:transform .25s}
.btn:hover .ar{transform:translateX(4px)}
.res-foot{display:flex;gap:1.6rem;margin-top:1.3rem;flex-wrap:wrap}
.res-foot div .k{font-family:var(--mono);font-size:.58rem;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.res-foot div .v{font-size:.86rem;margin-top:.25rem}

/* FOOTER */
.footer{border-top:1px solid var(--line-2);background:var(--footer-bg);position:relative;z-index:4}
.footer .wrap{padding-block:3.4rem}
.foot-top{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap;align-items:flex-end}
.foot-brand{font-weight:800;letter-spacing:.3em;font-size:1.5rem;display:flex;align-items:center;gap:.9rem}
.foot-brand .tessera-mark{width:22px;height:22px}
.foot-links{display:flex;gap:2rem;flex-wrap:wrap}
.foot-links a{color:var(--muted);text-decoration:none;font-size:.82rem;transition:.2s}
.foot-links a:hover{color:var(--text)}
.foot-bottom{display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;margin-top:2.6rem;
  padding-top:1.6rem;border-top:1px solid var(--line-2)}
.colophon{font-family:var(--mono);font-size:.64rem;color:var(--faint);letter-spacing:.06em;max-width:60ch;line-height:1.7}

/* progress */
.progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:55;
  background:linear-gradient(90deg,var(--gold),var(--ice));box-shadow:0 0 12px var(--gold)}

/* reveal helper */
.rise{opacity:0;transform:translateY(26px)}
.rise.in{opacity:1;transform:none;transition:opacity .9s var(--ease),transform .9s var(--ease)}

@media (prefers-reduced-motion: reduce){
  .rise{opacity:1!important;transform:none!important}
  .scrollcue .bar::after{animation:none}
  .statement .w{opacity:1!important}
}

@media(max-width:920px){
  .manifesto-grid > *,
  .eng-grid > *,
  .coll-stage > *,
  .reserve-grid > *,
  .fin-grid > *{
    min-width:0;
  }
}

@media(max-width:760px){
  html, body, .page, section, .wrap{
    max-width:100%;
    overflow-x:clip;
  }

  .nav{
    top:0;
    padding-top:calc(.85rem + env(safe-area-inset-top));
    padding-bottom:.85rem;
    background:var(--nav-bg);
    -webkit-backdrop-filter:blur(18px) saturate(1.3);
            backdrop-filter:blur(18px) saturate(1.3);
    border-bottom:1px solid var(--line-2);
  }

  .brand{
    gap:.55rem;
    font-size:.82rem;
    letter-spacing:.26em;
    padding-left:0;
  }

  .nav-cta,
  .ui-btn{
    padding:.62rem .9rem;
    font-size:.64rem;
    letter-spacing:.14em;
  }

  .hero{
    min-height:100svh;
    padding:calc(5.2rem + env(safe-area-inset-top)) 1rem 1.4rem;
  }

  .hero-wordmark{
    font-size:clamp(4rem,23vw,6.5rem);
  }

  .hero-bottom{
    align-items:flex-start;
  }

  .scrollcue{
    width:100%;
    justify-content:flex-start;
  }

  .statement{
    font-size:clamp(1.75rem,10vw,2.8rem);
    max-width:12ch;
  }

  .macro-figure img{
    height:min(72svh, 520px);
  }

  .blueprint{
    min-height:380px;
    padding:4rem 1.15rem 4.4rem;
  }

  .blueprint img{
    width:min(84%, 320px);
    transform:translateY(12px);
  }

  .bp-tag{
    font-size:.54rem;
    letter-spacing:.12em;
    padding:.42rem .62rem;
  }

  .spec-row{
    align-items:flex-start;
    flex-direction:column;
  }

  .spec-row .v{
    text-align:left;
  }

  .coll-stage{
    display:block;
  }

  .coll-frame,
  .coll-info,
  .city-tabs{
    width:100%;
    max-width:100%;
    min-width:0;
  }

  .coll-frame{
    aspect-ratio:1 / 1;
    margin-bottom:1.4rem;
  }

  .coll-info .cname{
    font-size:clamp(2.1rem,11vw,3.3rem);
    gap:.45rem;
    flex-wrap:wrap;
    min-width:0;
  }

  .coll-info .csub,
  .coll-info .cdesc{
    max-width:100%;
  }

  .coll-meta{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:1rem;
  }

  .city-tabs{
    padding-bottom:.35rem;
  }

  .city-tab{
    flex:0 0 auto;
  }

  .fin{
    min-height:300px;
  }

  .fin .body{
    padding:1.2rem;
  }

  .reserve{
    min-height:auto;
    padding-block:5rem;
  }

  .reserve-grid{
    gap:1.6rem;
  }

  .res-foot{
    gap:1rem;
  }

  .foot-top,
  .foot-bottom{
    gap:1.2rem;
  }
}

@media(max-width:520px){
  .wrap{
    padding:0 1rem;
  }

  .eyebrow{
    font-size:.63rem;
    letter-spacing:.22em;
  }

  .macro-figure img{
    height:min(58svh, 420px);
  }

  .blueprint{
    min-height:340px;
    padding:3.6rem 1rem 4rem;
  }

  .coll-info .cname{
    font-size:clamp(1.9rem,10.5vw,2.7rem);
  }

  .coll-meta{
    grid-template-columns:1fr;
  }

  .coll-info .cdesc,
  .lede{
    font-size:1rem;
  }
}