/* =========================================================================
   Sefirot Numerology of the Tree of Life
   Light theme — parchment, ink, gold leaf.
   ========================================================================= */

/* ---------- Tokens ---------- */
:root{
  /* surfaces */
  --parchment:  #FBF8F1;
  --paper:      #FFFDF8;
  --paper-warm: #F5EEE0;
  --paper-deep: #F0E7D5;

  /* ink */
  --ink:        #23244A;
  --ink-soft:   #4A4A6A;
  --ink-mute:   #7C7A8C;
  --ink-faint:  #A9A5B4;

  /* gold leaf */
  --gold:       #B8873A;
  --gold-deep:  #8F6620;
  --gold-lite:  #E3C57C;
  --gold-wash:  #F3E7CC;

  /* the three pillars */
  --pillar-mercy:    #C08A2E;  /* right  — expansion  */
  --pillar-severity: #5E6E8C;  /* left   — restraint  */
  --pillar-balance:  #57806B;  /* middle — reconciles */

  --line:       #E4DAC6;
  --line-soft:  #EEE6D6;

  --shadow-sm: 0 1px 2px rgba(60,45,15,.05), 0 2px 8px rgba(60,45,15,.04);
  --shadow-md: 0 2px 6px rgba(60,45,15,.06), 0 12px 32px rgba(60,45,15,.07);
  --shadow-lg: 0 4px 12px rgba(60,45,15,.07), 0 28px 60px rgba(60,45,15,.10);

  --display: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --sans:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --hebrew:  "Frank Ruhl Libre", "Times New Roman", serif;

  --wrap: 1180px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:90px; -webkit-text-size-adjust:100%; }
body{
  margin:0;
  background:var(--parchment);
  color:var(--ink-soft);
  font-family:var(--sans);
  font-size:17px;
  font-weight:300;
  line-height:1.72;
  /* Cormorant defaults to old-style figures; "1" and "0" become unreadable
     at display sizes, so force lining figures document-wide. */
  font-variant-numeric:lining-nums;
  font-feature-settings:"lnum" 1;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* faint laid-paper texture, drawn purely in CSS */
body::before{
  content:"";
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background-image:
    radial-gradient(circle at 18% 12%, rgba(224,196,132,.16), transparent 42%),
    radial-gradient(circle at 84% 78%, rgba(94,110,140,.09), transparent 46%),
    repeating-linear-gradient(0deg, rgba(120,96,50,.022) 0 1px, transparent 1px 4px);
}
img,svg{ max-width:100%; }
h1,h2,h3{ margin:0; font-family:var(--display); font-weight:500; color:var(--ink); line-height:1.14; }
p{ margin:0 0 1.05em; }
a{ color:var(--gold-deep); text-decoration:none; }
ol,ul{ margin:0; padding:0; list-style:none; }
:focus-visible{ outline:2px solid var(--gold); outline-offset:3px; border-radius:2px; }

.skip-link{
  position:absolute; left:-9999px; top:0; z-index:200;
  background:var(--ink); color:var(--paper);
  padding:.7rem 1.2rem; font-size:.85rem;
}
.skip-link:focus{ left:1rem; top:1rem; }

.wrap{ width:min(var(--wrap), 100% - 3rem); margin-inline:auto; position:relative; z-index:1; }
.wrap--narrow{ width:min(760px, 100% - 3rem); }

/* ---------- Type helpers ---------- */
.eyebrow{
  font-family:var(--sans);
  font-size:.7rem; font-weight:500;
  letter-spacing:.24em; text-transform:uppercase;
  color:var(--gold-deep);
  margin:0 0 1rem;
}
.h2{
  font-size:clamp(2.1rem, 4.4vw, 3.3rem);
  letter-spacing:-.012em;
}
.h2--center{ text-align:center; }
.h2 em{ font-style:italic; color:var(--gold-deep); }
.lead{
  font-family:var(--display);
  font-size:clamp(1.2rem,2vw,1.45rem);
  line-height:1.55;
  color:var(--ink);
  font-weight:400;
}
.footnote{
  margin-top:2.6rem;
  font-size:.82rem; line-height:1.7;
  color:var(--ink-mute);
  max-width:62ch;
  padding-left:1.1rem;
  border-left:1px solid var(--line);
}

/* ornamental rule */
.rule{ display:flex; align-items:center; gap:1rem; margin:0 auto 3.4rem; max-width:420px; color:var(--gold-lite); }
.rule i{ flex:1; height:1px; background:linear-gradient(90deg,transparent,var(--gold-lite),transparent); }
.rule span{ font-size:.6rem; color:var(--gold); }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  font-family:var(--sans); font-size:.82rem; font-weight:500;
  letter-spacing:.1em; text-transform:uppercase;
  padding:.95rem 1.9rem;
  border:1px solid transparent; border-radius:1px;
  cursor:pointer;
  transition:all .35s var(--ease);
}
.btn--solid{
  background:var(--ink); color:var(--paper);
  box-shadow:var(--shadow-sm);
}
.btn--solid:hover{ background:#2E3060; box-shadow:var(--shadow-md); transform:translateY(-1px); }
.btn--ghost{ border-color:var(--gold); color:var(--gold-deep); background:transparent; }
.btn--ghost:hover{ background:var(--gold-wash); }
.btn--sm{ padding:.65rem 1.25rem; font-size:.72rem; }
.btn--full{ width:100%; }

/* =========================================================================
   Header
   ========================================================================= */
.site-header{
  position:sticky; top:0; z-index:100;
  background:rgba(251,248,241,.82);
  backdrop-filter:saturate(150%) blur(14px);
  -webkit-backdrop-filter:saturate(150%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s, background .3s;
}
.site-header.is-stuck{ border-bottom-color:var(--line); }
.site-header__inner{ display:flex; align-items:center; gap:2rem; height:72px; }

.brand{ display:flex; align-items:center; gap:.7rem; color:var(--gold); flex:none; }
.brand__mark{ width:20px; height:25px; }
.brand__text{
  font-family:var(--display); font-size:1.06rem; font-weight:600;
  letter-spacing:.04em; color:var(--ink);
}
.nav{ display:flex; gap:2rem; margin-left:auto; }
.nav a{
  font-size:.78rem; font-weight:400; letter-spacing:.09em; text-transform:uppercase;
  color:var(--ink-mute); position:relative; padding-block:.4rem;
  transition:color .25s;
}
.nav a::after{
  content:""; position:absolute; left:0; bottom:0; width:100%; height:1px;
  background:var(--gold); transform:scaleX(0); transform-origin:right;
  transition:transform .35s var(--ease);
}
.nav a:hover{ color:var(--ink); }
.nav a:hover::after{ transform:scaleX(1); transform-origin:left; }
.nav a.is-active{ color:var(--gold-deep); }
.nav a.is-active::after{ transform:scaleX(1); }

.progress{ position:absolute; left:0; bottom:-1px; width:100%; height:1px; }
.progress i{
  display:block; height:100%; width:0%;
  background:linear-gradient(90deg,var(--gold-lite),var(--gold));
}

.nav-toggle{
  display:none; margin-left:auto;
  width:40px; height:40px; padding:0;
  background:none; border:1px solid var(--line); border-radius:1px; cursor:pointer;
  flex-direction:column; align-items:center; justify-content:center; gap:5px;
}
.nav-toggle span{ display:block; width:17px; height:1px; background:var(--ink); transition:transform .3s, opacity .3s; }
.nav-toggle[aria-expanded="true"] span:first-child{ transform:translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child{ transform:translateY(-3px) rotate(-45deg); }

.mobile-nav{
  display:none;
  position:sticky; top:72px; z-index:99;
  background:var(--paper); border-bottom:1px solid var(--line);
  padding:.5rem 1.5rem 1.2rem;
}
.mobile-nav.is-open{ display:block; }
.mobile-nav a{
  display:block; padding:.8rem 0;
  border-bottom:1px solid var(--line-soft);
  font-size:.9rem; letter-spacing:.05em; color:var(--ink);
}

/* =========================================================================
   Rail — the Tree as a scroll spine
   ========================================================================= */
.rail{
  position:fixed; left:26px; top:50%; transform:translateY(-50%);
  z-index:60; width:62px; text-align:center;
  opacity:0; transition:opacity .6s;
}
.rail.is-visible{ opacity:1; }
.rail__svg{ width:62px; height:310px; overflow:visible; }
.rail__path{ stroke:var(--line); stroke-width:1; fill:none; }
.rail__node{
  fill:var(--paper); stroke:var(--line); stroke-width:1.2;
  transition:fill .45s var(--ease), stroke .45s var(--ease), r .45s var(--ease);
}
.rail__node.is-lit{ fill:var(--gold-lite); stroke:var(--gold); }
.rail__node.is-current{ fill:var(--gold); stroke:var(--gold-deep); }
.rail__label{
  display:block; margin-top:.8rem;
  font-size:.58rem; letter-spacing:.18em; text-transform:uppercase;
  color:var(--gold-deep);
}

/* =========================================================================
   Hero
   ========================================================================= */
.hero{
  position:relative;
  min-height:min(94vh, 900px);
  display:flex; align-items:center;
  padding:6rem 0 8rem;
  overflow:hidden;
}
.hero__glow{
  position:absolute; z-index:0;
  width:900px; height:900px; right:-180px; top:-260px;
  background:radial-gradient(circle, rgba(224,196,132,.30), rgba(224,196,132,0) 62%);
  pointer-events:none;
}
.hero__tree{
  position:absolute; z-index:0;
  right:4%; top:50%; transform:translateY(-50%);
  height:min(94%, 780px); width:auto;
  color:var(--gold);
  opacity:.5;
  pointer-events:none;
}
.hero__paths path{ stroke-dasharray:3200; stroke-dashoffset:3200; animation:draw 3.6s var(--ease) .3s forwards; }
.hero__nodes circle{ opacity:0; animation:bloom .9s var(--ease) forwards; }
.hero__nodes circle:nth-child(1){ animation-delay:.55s } .hero__nodes circle:nth-child(2){ animation-delay:.75s }
.hero__nodes circle:nth-child(3){ animation-delay:.9s }  .hero__nodes circle:nth-child(4){ animation-delay:1.05s }
.hero__nodes circle:nth-child(5){ animation-delay:1.2s } .hero__nodes circle:nth-child(6){ animation-delay:1.35s }
.hero__nodes circle:nth-child(7){ animation-delay:1.5s } .hero__nodes circle:nth-child(8){ animation-delay:1.65s }
.hero__nodes circle:nth-child(9){ animation-delay:1.8s } .hero__nodes circle:nth-child(10){ animation-delay:1.95s }
.hero__daat{ animation-delay:2.3s !important; opacity:0; }
@keyframes draw{ to{ stroke-dashoffset:0 } }
@keyframes bloom{ from{ opacity:0; transform:scale(.4); transform-box:fill-box; transform-origin:center }
                  to{ opacity:.85; transform:scale(1) } }

.hero__inner{ max-width:660px; }
.hero__title{ margin:0 0 1.8rem; }
.hero__title-line{
  display:block;
  font-size:clamp(3.2rem, 9.5vw, 6.4rem);
  line-height:.94;
  letter-spacing:-.028em;
  font-weight:500;
}
.hero__title-line--alt{
  font-style:italic; font-weight:300;
  color:transparent;
  background:linear-gradient(96deg,#A9761F 8%,#D8AE55 42%,#8F6620 78%);
  -webkit-background-clip:text; background-clip:text;
  padding-right:.08em;
}
.hero__title-sub{
  display:block; margin-top:1.1rem;
  font-family:var(--sans); font-size:.78rem; font-weight:400;
  letter-spacing:.36em; text-transform:uppercase;
  color:var(--ink-mute);
}
.hero__lede{ font-family:var(--display); font-size:clamp(1.18rem,2.1vw,1.5rem); line-height:1.55; color:var(--ink); max-width:33em; }
.hero__lede em{ color:var(--gold-deep); }
.hero__actions{ display:flex; flex-wrap:wrap; gap:1rem; margin:2.4rem 0 3.4rem; }

.hero__stats{ display:flex; flex-wrap:wrap; gap:2.6rem; margin:0; padding-top:1.8rem; border-top:1px solid var(--line); }
.hero__stats dt{ font-size:.64rem; letter-spacing:.2em; text-transform:uppercase; color:var(--ink-faint); margin-bottom:.25rem; }
.hero__stats dd{ margin:0; font-family:var(--display); font-size:1.9rem; color:var(--gold-deep); line-height:1; }

.scroll-cue{
  position:absolute; left:50%; bottom:2.2rem; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:.7rem;
  font-size:.6rem; letter-spacing:.24em; text-transform:uppercase; color:var(--ink-faint);
}
.scroll-cue i{ width:1px; height:46px; background:linear-gradient(var(--gold-lite),transparent); animation:cue 2.4s ease-in-out infinite; }
@keyframes cue{ 0%,100%{ transform:scaleY(.35); opacity:.4 } 50%{ transform:scaleY(1); opacity:1 } }

/* =========================================================================
   Sections
   ========================================================================= */
.section{ padding:7.5rem 0; position:relative; }
.section--tight{ padding-top:4rem; }
.section--dark-paper{ background:var(--paper-warm); border-block:1px solid var(--line); }
.section--tree{ background:linear-gradient(180deg,var(--parchment),var(--paper) 40%,var(--parchment)); }

.section-head{ max-width:640px; margin-bottom:4rem; }
.section-head--center{ margin-inline:auto; text-align:center; }
.section-head__note{ margin-top:1.1rem; color:var(--ink-mute); font-size:.98rem; }

/* ---------- Premise ---------- */
.premise{ display:grid; grid-template-columns:1fr 1.25fr; gap:4rem; align-items:start; margin-bottom:5rem; }
.premise__lead .h2{ font-size:clamp(2rem,3.6vw,2.9rem); }

/* ---------- Cards ---------- */
.cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:1.5rem; }
.card{
  position:relative;
  background:var(--paper);
  border:1px solid var(--line);
  padding:2.6rem 2rem 2rem;
  transition:transform .45s var(--ease), box-shadow .45s var(--ease), border-color .45s;
}
.card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:var(--gold-lite); }
.card__num{
  position:absolute; top:1rem; right:1.4rem;
  font-family:var(--hebrew); font-size:3.4rem; line-height:1;
  color:var(--gold-wash);
  transition:color .45s;
}
.card:hover .card__num{ color:var(--gold-lite); }
.card h3{ font-size:1.42rem; margin-bottom:.7rem; }
.card p{ font-size:.95rem; margin:0; color:var(--ink-mute); }

/* =========================================================================
   Interactive Tree
   ========================================================================= */
.tree-layout{ display:grid; grid-template-columns:1fr 1fr; gap:4.5rem; align-items:center; }
.tree-stage{ position:relative; display:flex; flex-direction:column; align-items:center; }
.tree{ width:100%; max-width:470px; height:auto; overflow:visible; }
.tree-hint{ margin-top:1rem; font-size:.68rem; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-faint); }

.tree__path{ stroke:var(--line); stroke-width:1.2; fill:none; transition:stroke .4s, stroke-width .4s; }
.tree__path.is-live{ stroke:var(--gold-lite); stroke-width:1.7; }
.tree__path.is-hot{ stroke:var(--gold); stroke-width:2.2; }

.tree__node{ cursor:pointer; }
.tree__node circle{
  fill:var(--paper); stroke:var(--line);
  stroke-width:1.4;
  transition:fill .4s var(--ease), stroke .4s var(--ease), stroke-width .3s;
}
.tree__node .halo{
  fill:none; stroke:currentColor; stroke-width:1;
  opacity:0; transform-box:fill-box; transform-origin:center;
  transform:scale(.85);
  transition:opacity .5s var(--ease), transform .5s var(--ease);
}
.tree__node text{ font-family:var(--display); font-weight:500; fill:var(--ink); transition:fill .3s; pointer-events:none; }
.tree__node .num{ font-size:26px; }
.tree__node .heb{ font-family:var(--hebrew); font-size:12px; fill:var(--ink-faint); }

.tree__node:hover circle{ stroke:currentColor; }
.tree__node:hover .halo{ opacity:.35; transform:scale(1.06); }
.tree__node.is-active circle{ fill:currentColor; stroke:currentColor; stroke-width:1.4; }
.tree__node.is-active .halo{ opacity:.6; transform:scale(1.16); }
.tree__node.is-active text{ fill:#fff; }
.tree__node.is-active .heb{ fill:rgba(255,255,255,.75); }

.tree__daat circle{ fill:none; stroke:var(--line); stroke-dasharray:3 5; }
.tree__daat text{ font-size:9px; fill:var(--ink-faint); letter-spacing:.1em; }

/* pillar tints applied via currentColor on the group */
.pillar-mercy{ color:var(--pillar-mercy); }
.pillar-severity{ color:var(--pillar-severity); }
.pillar-balance{ color:var(--pillar-balance); }

/* ---------- Detail panel ---------- */
.detail{
  background:var(--paper);
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
  padding:2.8rem;
  position:relative;
  min-height:440px;
}
.detail::before{
  content:""; position:absolute; left:0; top:0; width:3px; height:100%;
  background:currentColor; opacity:.85;
}
.detail__top{ display:flex; align-items:flex-start; justify-content:space-between; gap:1.5rem; margin-bottom:1.6rem; }
.detail__num{
  font-family:var(--display); font-size:5.4rem; line-height:.8;
  color:currentColor; font-weight:300;
}
.detail__heb{
  font-family:var(--hebrew); font-size:2.6rem; line-height:1;
  color:var(--ink); text-align:right;
}
.detail__translit{ display:block; font-family:var(--sans); font-size:.63rem; letter-spacing:.2em; text-transform:uppercase; color:var(--ink-faint); margin-top:.5rem; }
.detail__name{ font-size:2.1rem; margin-bottom:.15rem; }
.detail__title{
  font-family:var(--sans); font-size:.7rem; letter-spacing:.22em; text-transform:uppercase;
  color:currentColor; margin-bottom:1.4rem;
}
.detail__body{ font-size:.97rem; color:var(--ink-soft); }
.detail__body p{ margin-bottom:.9rem; }
.detail__quote{
  font-family:var(--display); font-style:italic; font-size:1.16rem; line-height:1.5;
  color:var(--ink); margin:0 0 1.3rem; padding-left:1rem;
  border-left:2px solid var(--gold-lite);
}
.detail__grid{
  display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
  background:var(--line-soft); border:1px solid var(--line-soft);
  margin-top:1.8rem;
}
.detail__grid div{ background:var(--paper); padding:.85rem .9rem; }
.detail__grid dt{ font-size:.58rem; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-faint); margin-bottom:.25rem; }
.detail__grid dd{ margin:0; font-family:var(--display); font-size:1.15rem; color:var(--ink); }
.detail__chapter{
  display:inline-flex; align-items:center; gap:.5rem; margin-top:1.6rem;
  font-size:.72rem; letter-spacing:.14em; text-transform:uppercase; color:var(--gold-deep);
}
.detail.is-swapping{ opacity:0; transform:translateY(6px); }
.detail{ transition:opacity .28s var(--ease), transform .28s var(--ease); }

/* =========================================================================
   22 letter-paths
   ========================================================================= */
.letters{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(158px,1fr));
  border-top:1px solid var(--line);
  border-left:1px solid var(--line);
}
.letter{
  background:var(--paper);
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:1.5rem 1.1rem 1.3rem;
  position:relative; overflow:hidden;
  transition:background .4s var(--ease);
  cursor:default;
}
.letter:hover{ background:var(--paper-deep); }
.letter__glyph{
  font-family:var(--hebrew); font-size:2.7rem; line-height:1.1; color:var(--ink);
  display:block; margin-bottom:.5rem;
  direction:ltr; text-align:left;
  transition:color .4s var(--ease), transform .4s var(--ease);
  transform-origin:left center;
}
.letter:hover .letter__glyph{ color:var(--gold); transform:scale(1.08); }
.letter__name{ display:block; font-family:var(--display); font-size:1.14rem; color:var(--ink); line-height:1.2; }
.letter__val{
  position:absolute; top:1.15rem; right:1.1rem;
  font-size:.66rem; letter-spacing:.08em; color:var(--ink-faint);
  font-variant-numeric:tabular-nums;
}
.letter__meta{ display:block; font-size:.74rem; color:var(--ink-mute); margin-top:.15rem; line-height:1.5; }
.letter__route{ display:block; color:var(--gold-deep); font-size:.66rem; letter-spacing:.05em; margin-top:.5rem; }

/* Tav closes the alphabet — let it close the table too, spanning whatever
   columns are left over in the final row at any breakpoint. */
.letter--last{
  grid-column:1 / -1;
  display:flex; align-items:center; flex-wrap:wrap;
  gap:.35rem 1.7rem;
  background:var(--paper-deep);
}
.letter--last .letter__glyph{ margin:0; font-size:3.1rem; }
.letter--last .letter__meta{ margin:0; }
.letter--last .letter__val{ position:static; }
.letter--last .letter__route{ margin:0 0 0 auto; }

/* =========================================================================
   Contents
   ========================================================================= */
.toc-layout{ display:grid; grid-template-columns:1.55fr 1fr; gap:5rem; align-items:start; }
.toc__part + .toc__part{ margin-top:2.8rem; }
.toc__part-title{
  font-family:var(--sans); font-size:.72rem; font-weight:500;
  letter-spacing:.2em; text-transform:uppercase; color:var(--ink-mute);
  padding-bottom:.7rem; margin-bottom:.4rem; border-bottom:1px solid var(--line);
  display:flex; gap:.8rem;
}
.toc__part-title span{ color:var(--gold-deep); }
.toc__list li{
  display:grid; grid-template-columns:auto 1fr auto; gap:1.2rem; align-items:baseline;
  padding:.72rem 0; border-bottom:1px solid var(--line-soft);
  transition:padding-left .35s var(--ease);
}
.toc__list li:hover{ padding-left:.5rem; }
.toc__n{ font-family:var(--display); font-size:.95rem; color:var(--gold); min-width:1.6em; }
.toc__t{ font-family:var(--display); font-size:1.28rem; color:var(--ink); line-height:1.3; }
.toc__s{ font-size:.68rem; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-faint); white-space:nowrap; }
.toc__appendix{ margin-top:1.2rem; font-size:.82rem; color:var(--ink-mute); font-style:italic; }

.specs{ position:sticky; top:110px; }
.cover{ margin:0 0 2rem; filter:drop-shadow(0 22px 40px rgba(60,45,15,.18)); }
.cover svg{ display:block; width:100%; height:auto; transform:perspective(1200px) rotateY(-9deg); transition:transform .8s var(--ease); }
.cover:hover svg{ transform:perspective(1200px) rotateY(-2deg) translateY(-6px); }
.specs__list{ margin:0; border-top:1px solid var(--line); }
.specs__list div{ display:flex; justify-content:space-between; gap:1rem; padding:.7rem 0; border-bottom:1px solid var(--line-soft); }
.specs__list dt{ font-size:.66rem; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-faint); }
.specs__list dd{ margin:0; font-size:.86rem; color:var(--ink); text-align:right; }

/* =========================================================================
   Excerpt
   ========================================================================= */
.section--excerpt{ background:var(--paper-warm); border-block:1px solid var(--line); }
.page{
  position:relative;
  background:var(--paper);
  border:1px solid var(--line);
  box-shadow:var(--shadow-lg);
  padding:4.5rem clamp(2rem,6vw,4.5rem) 4rem;
  overflow:hidden;
  font-family:var(--display);
  font-size:1.2rem;
  line-height:1.72;
  color:var(--ink);
}
.page::after{
  content:""; position:absolute; inset:14px; border:1px solid var(--line-soft); pointer-events:none;
}
.page__folio{
  position:absolute; top:1.6rem; right:2rem;
  font-family:var(--sans); font-size:.66rem; letter-spacing:.2em; color:var(--ink-faint);
}
.page__watermark{
  position:absolute; bottom:-1.6rem; left:1.6rem;
  font-family:var(--hebrew); font-size:11rem; line-height:1;
  color:var(--gold-wash); opacity:.7; pointer-events:none; user-select:none;
}
/* keep prose above the watermark without clobbering the absolutely
   positioned folio / watermark, which are also direct children */
.page > p,
.page > .pull{ position:relative; z-index:1; }
.page__drop::first-letter{
  float:left;
  font-size:4.4rem; line-height:.86;
  padding:.06em .12em 0 0;
  color:var(--gold-deep);
  font-weight:500;
}
.page em{ color:var(--gold-deep); }
.pull{
  margin:2.2rem 0; padding:1.4rem 0;
  border-block:1px solid var(--gold-lite);
  text-align:center;
}
.pull p{ margin:0; font-style:italic; font-size:1.42rem; line-height:1.45; color:var(--ink); }

/* =========================================================================
   Calculator
   ========================================================================= */
.section--calc{ position:relative; }
.calc{ max-width:720px; margin-inline:auto; }
.calc__form{
  background:var(--paper); border:1px solid var(--line);
  padding:2.2rem; box-shadow:var(--shadow-sm);
}
.calc__label{ display:block; font-size:.66rem; letter-spacing:.2em; text-transform:uppercase; color:var(--ink-faint); margin-bottom:.7rem; }
.calc__row{ display:flex; gap:.8rem; flex-wrap:wrap; }
.calc__input{
  flex:1 1 220px;
  font-family:var(--sans); font-size:1rem; color:var(--ink);
  padding:.85rem 1rem;
  background:var(--parchment);
  border:1px solid var(--line); border-radius:1px;
  transition:border-color .3s, background .3s;
}
.calc__input:focus{ border-color:var(--gold); background:var(--paper); outline:none; }
.calc__err{ margin:.9rem 0 0; font-size:.82rem; color:#9A4A3A; min-height:1.2em; }

.calc__result{
  margin-top:1.5rem;
  background:var(--paper); border:1px solid var(--line);
  box-shadow:var(--shadow-md);
  padding:2.6rem;
  display:grid; grid-template-columns:auto 1fr; gap:2.4rem; align-items:center;
  animation:rise .6s var(--ease);
}
@keyframes rise{ from{ opacity:0; transform:translateY(14px) } to{ opacity:1; transform:none } }
.calc__medal{
  width:132px; height:132px; border-radius:50%;
  display:grid; place-items:center;
  background:radial-gradient(circle at 32% 28%, #fff, var(--gold-wash));
  border:1px solid var(--gold-lite);
  position:relative;
}
.calc__medal::after{ content:""; position:absolute; inset:9px; border:1px solid var(--gold-lite); border-radius:50%; opacity:.55; }
.calc__medal b{ font-family:var(--display); font-size:3.6rem; font-weight:400; color:currentColor; line-height:1; }
.calc__sum{ font-size:.72rem; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-faint); margin:0 0 .5rem; }
.calc__name{ font-family:var(--display); font-size:2rem; color:var(--ink); margin:0 0 .1rem; }
.calc__name span{ font-family:var(--hebrew); color:var(--gold-deep); margin-left:.5rem; font-size:1.6rem; }
.calc__title{ font-size:.7rem; letter-spacing:.2em; text-transform:uppercase; color:currentColor; margin:0 0 1rem; }
.calc__desc{ margin:0; font-size:.95rem; color:var(--ink-mute); }
.calc__chain{ margin:.9rem 0 0; font-size:.8rem; color:var(--ink-faint); font-variant-numeric:tabular-nums; }

/* =========================================================================
   Author
   ========================================================================= */
.author{ display:grid; grid-template-columns:280px 1fr; gap:4rem; align-items:center; }
.author__portrait{ border:1px solid var(--line); box-shadow:var(--shadow-md); background:var(--paper); padding:10px; }
.author__portrait svg{ display:block; }
.author__text{ max-width:56ch; }
.author__sig{
  font-family:var(--display); font-style:italic; font-size:2rem;
  color:var(--gold-deep); margin-top:1.4rem; opacity:.9;
  transform:rotate(-2deg); transform-origin:left;
}

/* =========================================================================
   Order
   ========================================================================= */
.section--order{ background:var(--paper-warm); border-top:1px solid var(--line); }
.order__note{ text-align:center; color:var(--ink-mute); max-width:52ch; margin:1.2rem auto 3.4rem; font-size:.95rem; }
.editions{ display:grid; grid-template-columns:repeat(3,1fr); gap:1.4rem; align-items:stretch; }
.edition{
  display:flex; flex-direction:column;
  background:var(--paper); border:1px solid var(--line);
  padding:2.4rem 1.8rem;
  text-align:center;
  transition:transform .45s var(--ease), box-shadow .45s var(--ease);
}
.edition:hover{ transform:translateY(-5px); box-shadow:var(--shadow-md); }
.edition--feature{ border-color:var(--gold); box-shadow:var(--shadow-md); }
.edition__list{ flex:1; }
.edition__tag{ font-size:.6rem; letter-spacing:.22em; text-transform:uppercase; color:var(--gold-deep); margin:0 0 .8rem; }
.edition__name{ font-size:1.7rem; margin-bottom:.4rem; }
.edition__price{ font-family:var(--display); font-size:2.9rem; color:var(--ink); margin:0 0 1.4rem; line-height:1; }
.edition__price span{ font-size:1.15rem; color:var(--ink-faint); vertical-align:.9em; letter-spacing:.02em; }
.edition__list{ margin:0 0 1.8rem; font-size:.86rem; color:var(--ink-mute); }
.edition__list li{ padding:.42rem 0; border-top:1px solid var(--line-soft); }
.edition__list li:first-child{ border-top:0; }
.retailers{ text-align:center; margin-top:2.8rem; font-size:.85rem; color:var(--ink-mute); }
.retailers a{ border-bottom:1px solid var(--gold-lite); }
.retailers a:hover{ background:var(--gold-wash); }

/* =========================================================================
   Footer
   ========================================================================= */
.site-footer{ background:var(--ink); color:#C9C7DA; padding:4.5rem 0 2rem; position:relative; z-index:1; }
.site-footer__inner{ display:flex; justify-content:space-between; gap:3rem; flex-wrap:wrap; padding-bottom:3rem; border-bottom:1px solid rgba(255,255,255,.1); }
.site-footer__brand{ display:flex; gap:1rem; align-items:flex-start; color:var(--gold-lite); max-width:34ch; }
.site-footer__brand .brand__mark{ width:22px; height:28px; flex:none; margin-top:3px; }
.site-footer__brand p{ margin:0; font-size:.85rem; line-height:1.7; color:#C9C7DA; }
.site-footer__brand strong{ font-family:var(--display); font-size:1.12rem; font-weight:500; color:var(--paper); }
.site-footer__nav{ display:grid; grid-template-columns:repeat(2,auto); gap:.7rem 3rem; align-content:start; }
.site-footer__nav a{ font-size:.78rem; letter-spacing:.1em; text-transform:uppercase; color:#A8A6BC; transition:color .25s; }
.site-footer__nav a:hover{ color:var(--gold-lite); }
.site-footer__base{ display:flex; justify-content:space-between; gap:1.5rem; flex-wrap:wrap; padding-top:1.6rem; }
.site-footer__base p{ margin:0; font-size:.72rem; color:#8A88A0; }

/* =========================================================================
   Reveal on scroll
   ========================================================================= */
.reveal{ opacity:0; transform:translateY(20px); transition:opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.is-in{ opacity:1; transform:none; }
.reveal[data-delay="1"]{ transition-delay:.09s } .reveal[data-delay="2"]{ transition-delay:.18s }
.reveal[data-delay="3"]{ transition-delay:.27s } .reveal[data-delay="4"]{ transition-delay:.36s }

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width:1240px){ .rail{ display:none; } }

@media (max-width:1000px){
  .nav{ display:none; }
  .site-header .btn--sm{ display:none; }
  .nav-toggle{ display:flex; }
  .tree-layout,.toc-layout,.premise,.author{ grid-template-columns:1fr; gap:3rem; }
  .specs{ position:static; }
  .cover{ max-width:280px; }
  .author__portrait{ max-width:240px; }
  .cards{ grid-template-columns:1fr; }
  .editions{ grid-template-columns:1fr; align-items:stretch; }
  .hero__tree{ opacity:.22; right:-14%; }
}

@media (max-width:640px){
  body{ font-size:16px; }
  .section{ padding:5rem 0; }
  .wrap,.wrap--narrow{ width:calc(100% - 2.4rem); }
  .hero{ padding:4rem 0 6rem; min-height:auto; }
  .hero__stats{ gap:1.6rem 2rem; }
  .hero__stats dd{ font-size:1.5rem; }
  .btn{ padding:.85rem 1.4rem; font-size:.75rem; }
  .detail,.calc__result,.page{ padding:1.8rem; }
  .detail__num{ font-size:4rem; }
  .calc__result{ grid-template-columns:1fr; justify-items:center; text-align:center; gap:1.6rem; }
  .detail__grid{ grid-template-columns:1fr; }
  .letters{ grid-template-columns:repeat(auto-fill,minmax(128px,1fr)); }
  .toc__list li{ grid-template-columns:auto 1fr; }
  .toc__s{ grid-column:2; }
  .page__watermark{ font-size:7rem; }
  .hero__tree{ opacity:.13; }
  .hero__actions .btn{ flex:1 1 100%; }
  .scroll-cue{ display:none; }
  .site-footer__inner{ flex-direction:column; }
}

/* =========================================================================
   Reduced motion
   ========================================================================= */
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
  .reveal{ opacity:1; transform:none; }
  .hero__paths path{ stroke-dashoffset:0; }
  .hero__nodes circle{ opacity:.85; }
}

/* =========================================================================
   Print
   ========================================================================= */
@media print{
  .site-header,.rail,.mobile-nav,.scroll-cue,.hero__tree,.hero__glow,.site-footer{ display:none !important; }
  body{ background:#fff; color:#000; }
  .section{ padding:1.5rem 0; break-inside:avoid; }
}