/* ============================================================
   Black Paper Crane — light, minimal, editorial, dark accents
   ============================================================ */

:root{
  --paper:#FFFFFF;      /* pure white background */
  --paper-2:#F5F6F7;    /* crisp cool light-grey band */
  --ink:#080808;        /* near-black */
  --ink-soft:#2B2B2B;
  --muted:#5C5C5C;      /* secondary text */
  --line:rgba(0,0,0,.12);
  --line-2:rgba(0,0,0,.06);

  --maxw:1160px;
  --pad:clamp(1.25rem, 5vw, 4rem);

  --serif:"Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
h1,h2,h3{overflow-wrap:break-word}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:clamp(1rem,.96rem + .25vw,1.125rem);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{max-width:100%;display:block}
a{color:inherit}

.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--paper);
  padding:.6rem 1rem;border-radius:0 0 .4rem 0;z-index:100;
}
.skip-link:focus{left:0}

:focus-visible{outline:2px solid var(--ink);outline-offset:3px;border-radius:2px}

/* ---------- Typography ---------- */
h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.06;letter-spacing:-.015em;margin:0}
h1{font-size:clamp(2.6rem,1.4rem + 5.6vw,5.4rem)}
h2{font-size:clamp(1.9rem,1.2rem + 2.8vw,3rem)}
h3{font-size:1.18rem;letter-spacing:-.01em}
p{margin:0 0 1.1rem}
em{font-style:italic}
strong{font-weight:600;color:var(--ink)}

.eyebrow,.kicker{
  font-family:var(--sans);
  font-size:.74rem;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--muted);margin:0 0 1.1rem;
}
.kicker{display:inline-block}
.kicker::before{content:"";display:inline-block;width:1.8rem;height:1px;background:var(--ink);
  vertical-align:middle;margin-right:.7rem;transform:translateY(-.2em)}

/* ---------- Header ---------- */
.site-head{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.9rem var(--pad);
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line-2);
}
.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--ink)}
.brand-mark{width:44px;height:31px;color:var(--ink);display:block;flex:none}
.brand-mark svg{width:100%;height:100%}
.brand-word{font-family:var(--serif);font-size:1.18rem;letter-spacing:-.01em;white-space:nowrap}
.brand-word.small{font-size:1rem}

.site-nav{display:flex;align-items:center;gap:clamp(.8rem,2.4vw,2rem)}
.site-nav a{text-decoration:none;font-size:.94rem;color:var(--ink-soft);transition:color .2s var(--ease)}
.site-nav a:hover{color:var(--ink)}
.site-nav a:not(.nav-cta){position:relative}
.site-nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-4px;height:1px;width:0;
  background:var(--ink);transition:width .25s var(--ease)}
.site-nav a:not(.nav-cta):hover::after{width:100%}
.nav-cta{
  padding:.5rem 1rem;border:1px solid var(--ink);border-radius:100px;color:var(--ink);
  transition:background .2s var(--ease),color .2s var(--ease);
}
.nav-cta:hover{background:var(--ink);color:var(--paper)}
@media (max-width:640px){
  .site-nav a:not(.nav-cta){display:none}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--sans);font-weight:500;font-size:.98rem;letter-spacing:.01em;
  text-decoration:none;padding:.85rem 1.6rem;border-radius:100px;border:1px solid var(--ink);
  transition:transform .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
  will-change:transform;
}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-lg{padding:1.05rem 2.2rem;font-size:1.05rem}

/* ---------- Layout primitives ---------- */
.section,.band{padding:clamp(4rem,9vw,8rem) var(--pad)}
.section{max-width:var(--maxw);margin-inline:auto}
.band{background:var(--paper);border-block:1px solid var(--line-2)}
.band + .band{border-top:0}   /* adjacent bands share one hairline, never double */
.band.alt{background:var(--ink);color:var(--paper)}
.band > *{max-width:var(--maxw);margin-inline:auto}
.measure{max-width:46rem;margin-inline:auto}
.measure.center{text-align:center}
.center{text-align:center}

.section-head{max-width:46rem;margin:0 auto clamp(2.5rem,5vw,3.5rem)}

/* ---------- Hero ---------- */
.hero{
  max-width:var(--maxw);margin-inline:auto;
  padding:clamp(4.5rem,11vw,9rem) var(--pad) clamp(3.5rem,8vw,6rem);
}
.hero h1{margin:.4rem 0 0;max-width:16ch}
.hero .lede{
  font-size:clamp(1.15rem,1rem + .8vw,1.5rem);line-height:1.5;color:var(--ink-soft);
  max-width:34rem;margin:1.6rem 0 2.4rem;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem}

/* ---------- Premise / big type ---------- */
.big-type{
  font-family:var(--serif);font-size:clamp(1.5rem,1.1rem + 2vw,2.4rem);
  line-height:1.22;letter-spacing:-.015em;color:var(--ink);margin-bottom:1.6rem;
}
#premise p:not(.big-type){color:var(--ink-soft);font-size:1.08rem}

/* ---------- Two columns ---------- */
.cols{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4.5rem);align-items:start}
.col p{color:var(--ink-soft)}
@media (max-width:760px){.cols{grid-template-columns:1fr;gap:2rem}}

/* ---------- Checklist ---------- */
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:1rem}
.checklist li{position:relative;padding-left:2rem;line-height:1.5}
.checklist li::before{
  content:"";position:absolute;left:0;top:.5em;width:13px;height:8px;
  border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);
  transform:rotate(-45deg);transform-origin:center;
}
.band.alt .checklist li::before{border-color:var(--paper)}
.band.alt .checklist li strong{color:var(--paper)}

/* ---------- Card grid ---------- */
.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden}
.card{background:var(--paper);padding:clamp(1.5rem,3vw,2.4rem)}
.card h3{margin-bottom:.6rem}
.card p{margin:0;color:var(--muted)}
.aside{margin:2rem auto 0;max-width:46rem;text-align:center;color:var(--muted);font-size:.98rem}
@media (max-width:680px){.card-grid{grid-template-columns:1fr}}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  gap:clamp(2rem,5vw,4.5rem);align-items:center}
.about-portrait img{
  border-radius:14px;width:100%;height:auto;
  filter:grayscale(1) contrast(1.02);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.6);
}
.about-body h2{margin:.3rem 0 1.2rem}
.about-body .eyebrow{color:var(--muted)}
.about-body p{color:var(--ink-soft)}
.about-body .sign{font-family:var(--serif);font-style:italic;color:var(--muted);margin-top:1.6rem}
@media (max-width:760px){
  .about-grid{grid-template-columns:1fr;gap:2rem}
  .about-portrait{max-width:320px}
}

/* ---------- Meaning ---------- */
.meaning-mark{display:inline-block;width:160px;height:113px;color:var(--ink);margin-bottom:1.6rem}
.meaning-mark svg{width:100%;height:100%}
.meaning h2{margin-bottom:1.2rem}
.meaning p{color:var(--ink-soft);font-size:1.1rem}

/* ---------- FAQ ---------- */
.faq{max-width:46rem;margin-inline:auto;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  cursor:pointer;list-style:none;padding:1.3rem .25rem;
  font-family:var(--serif);font-size:1.2rem;display:flex;justify-content:space-between;align-items:center;gap:1rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--sans);font-weight:400;font-size:1.5rem;color:var(--muted);transition:transform .25s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0 0 1.3rem;padding-right:2.5rem;color:var(--ink-soft)}

/* ---------- Begin ---------- */
.cost h2{margin-bottom:1.1rem}
.cost p{color:var(--ink-soft)}
.begin h2{margin-bottom:1.1rem}
.begin .btn{margin-top:.6rem}
.contact-line{margin-top:1.8rem;color:var(--muted);font-size:.98rem}
.contact-line a{color:var(--ink);text-underline-offset:3px}

/* ---------- Footer ---------- */
.site-foot{padding:3rem var(--pad);border-top:1px solid var(--line);max-width:var(--maxw);margin-inline:auto}
.foot-row{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:.6rem;margin-bottom:1.2rem}
.foot-note{color:var(--muted);font-size:.9rem;font-style:italic;font-family:var(--serif)}
.foot-fine{color:var(--muted);font-size:.8rem;line-height:1.6;max-width:60rem;margin:0}

/* ---------- Reveal on scroll ---------- */
.section,.band{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.section.in,.band.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .section,.band{opacity:1;transform:none;transition:none}
}