/* ==========================================================================
   Chōtei — Strategic Negotiation & Mediation
   Design language: Swiss editorial. White, ink, precise grey rules —
   a single red used surgically, mainly to mark numbers and figures.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --paper:      #FFFFFF;
  --paper-2:    #F4F3F0;
  --paper-3:    #E9E8E3;
  --paper-line: rgba(20,20,18,0.12);

  --ink:        #171715;
  --ink-soft:   #33332E;

  --red:        #C1392B;
  --red-deep:   #9E2E22;
  --red-pale:   #F5E3E0;

  --stone:      #6B6B65;
  --stone-light:#9A9A92;

  --ink-muted:  rgba(255,255,255,0.66);
  --ink-faint:  rgba(255,255,255,0.36);

  --font-display: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --container: 1180px;
  --gutter: clamp(24px, 5vw, 72px);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
h1,h2,h3,h4{ font-family: var(--font-display); font-weight: 700; margin: 0; letter-spacing: -0.01em; }
p{ margin:0; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family: inherit; cursor:pointer; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

a:focus-visible, button:focus-visible{
  outline: 2px solid var(--red);
  outline-offset: 3px;
}

.wrap{
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  display: inline-flex;
  align-items:center;
  gap: 10px;
  color: var(--stone);
}
.eyebrow::before{
  content:"";
  width: 18px; height: 1px;
  background: currentColor;
  opacity: 0.6;
}

/* ---------------------------------- nav --------------------------------- */
.site-nav{
  position: sticky; top:0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--paper-line);
}
.site-nav .wrap{
  display:flex; align-items:center; justify-content:space-between;
  height: 76px;
}
.brand{
  display:flex; align-items:center; gap: 12px;
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.01em;
}
.brand .seal-mini{ width: 34px; height:34px; flex-shrink:0; }
.brand small{
  display:block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 9.5px;
  letter-spacing: 0.16em;
  color: var(--stone-light);
  text-transform: uppercase;
  margin-top: 2px;
}

.nav-links{ display:flex; align-items:center; gap: 36px; }
.nav-links a{
  color: var(--stone);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  position:relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}
.nav-links a:hover{ color: var(--ink); }
.nav-links a.active{ color: var(--red); }
.nav-cta{
  border: 1px solid var(--ink) !important;
  padding: 9px 18px !important;
  border-radius: 1px;
  color: var(--ink) !important;
  font-family: var(--font-mono);
  font-size: 12px !important;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav-cta:hover{ background: var(--ink); color: var(--paper) !important; }

.nav-toggle{
  display:none;
  background:none; border:none; color: var(--ink);
  width: 34px; height:34px; position:relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content:""; position:absolute; left:6px; right:6px; height:1.5px; background: currentColor;
  transition: transform .25s ease, opacity .25s ease;
}
.nav-toggle span{ top:50%; transform: translateY(-50%); }
.nav-toggle span::before{ top:-8px; }
.nav-toggle span::after{ top:8px; }
.nav-toggle[aria-expanded="true"] span{ background: transparent; }
.nav-toggle[aria-expanded="true"] span::before{ transform: rotate(45deg) translate(-1px,-1px); top:0; }
.nav-toggle[aria-expanded="true"] span::after{ transform: rotate(-45deg) translate(-1px,1px); top:0; }

@media (max-width: 860px){
  .nav-toggle{ display:block; }
  .nav-links{
    position:absolute; top:76px; left:0; right:0;
    background: var(--paper);
    flex-direction:column; align-items:flex-start;
    padding: 8px var(--gutter) 28px;
    gap: 20px;
    border-bottom: 1px solid var(--paper-line);
    display:none;
  }
  .nav-links.open{ display:flex; }
  .nav-cta{ align-self:flex-start; }
}

/* -------------------------------- buttons -------------------------------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 15px 26px;
  border-radius: 1px;
  transition: all 0.22s ease;
}
.btn-primary{
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover{ background: var(--red); transform: translateY(-1px); }
.btn-ghost{
  border: 1px solid var(--paper-line);
  color: var(--ink);
}
.btn-ghost:hover{ border-color: var(--ink); }
.btn-ghost-dark{
  border: 1px solid rgba(255,255,255,0.32);
  color: var(--paper);
}
.btn-ghost-dark:hover{ border-color: var(--paper); }

/* --------------------------------- hero ----------------------------------- */
.hero{
  position:relative;
  overflow:hidden;
  padding: 100px 0 92px;
  background-color: var(--paper);
  background-repeat: no-repeat;
  background-position: center 30%;
  background-size: cover;
}
.hero.bg-photo-clear{
  background-image:
    linear-gradient(175deg, rgba(255,255,255,0.96), rgba(255,255,255,0.91) 45%, rgba(255,255,255,0.97)),
    url('assets/photo-clear.jpg');
}
.hero .wrap{ position:relative; display:grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items:center; }
.hero-eyebrow{ margin-bottom: 26px; }
.hero h1{
  font-size: clamp(2.3rem, 4.2vw, 3.6rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  max-width: 16ch;
  color: var(--ink);
}
.hero h1 em{ font-style: normal; color: var(--red); }
.hero-sub{
  margin-top: 26px;
  max-width: 46ch;
  font-size: 17.5px;
  color: var(--stone);
  line-height: 1.7;
}
.hero-actions{ margin-top: 40px; display:flex; align-items:center; gap: 22px; flex-wrap:wrap; }
.hero-note{ font-family: var(--font-mono); font-size: 12px; color: var(--stone-light); letter-spacing: 0.03em; }

.hero-seal-wrap{
  display:flex; justify-content:center; align-items:center;
  position:relative;
}
.hero-seal-wrap .hero-logo{ width: min(300px, 84%); height:auto; filter: drop-shadow(0 18px 34px rgba(23,23,21,0.14)); }
.hero-seal-wrap::after{
  content:"";
  position:absolute; z-index:-1;
  width: 118%; height:118%;
  background: radial-gradient(circle, var(--paper-3) 0%, rgba(233,232,227,0) 72%);
  border-radius: 50%;
}

@media (max-width: 900px){
  .hero .wrap{ grid-template-columns: 1fr; }
  .hero-seal-wrap{ order:-1; margin-bottom: 8px; }
  .hero-seal-wrap .hero-logo{ width: 180px; }
}

/* ------------------------------- sections --------------------------------- */
section{ padding: 92px 0; }
.section-head{ max-width: 640px; margin-bottom: 52px; }
.section-head .eyebrow{ margin-bottom: 18px; }
.section-head h2{ font-size: clamp(1.65rem, 2.8vw, 2.3rem); line-height: 1.2; }
.section-head p{ margin-top: 18px; color: var(--stone); font-size: 16.5px; line-height:1.7; }

/* ------------------------------ intro / lede ------------------------------- */
.lede{
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
  background: var(--paper-2);
}
.lede .wrap{ display:grid; grid-template-columns: 0.6fr 1.4fr; gap: 48px; }
.lede h2{ font-size: clamp(1.4rem, 2.4vw, 1.9rem); line-height:1.28; color: var(--ink); }
.lede-body p{ font-size: 17px; line-height: 1.8; color: var(--ink); }
.lede-body p + p{ margin-top: 18px; }
@media (max-width: 800px){ .lede .wrap{ grid-template-columns:1fr; gap:22px; } }

/* -------------------------------- exhibits --------------------------------- */
.exhibits{ background: var(--paper); }
.exhibit-grid{
  display:grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--paper-line);
  border: 1px solid var(--paper-line);
}
.exhibit{
  background: var(--paper);
  padding: 34px 28px 30px;
  display:flex; flex-direction:column; gap: 16px;
  min-height: 250px;
  border-top: 2px solid var(--ink);
}
.exhibit-tag{
  font-family: var(--font-mono); font-size: 11px; letter-spacing:0.1em;
  color: var(--stone); text-transform:uppercase;
}
.exhibit-figure{
  font-family: var(--font-display); font-weight:700;
  font-size: clamp(1.9rem, 2.8vw, 2.4rem);
  color: var(--red);
  line-height:1;
}
.exhibit p{ color: var(--stone); font-size: 14.5px; line-height:1.6; }
.exhibit-source{ margin-top:auto; font-family: var(--font-mono); font-size: 10.5px; color: var(--stone-light); padding-top: 10px; }
@media (max-width: 980px){ .exhibit-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .exhibit-grid{ grid-template-columns: 1fr; } }

.exhibits-foot{ margin-top: 40px; display:flex; gap: 14px; align-items:baseline; }
.exhibits-foot p{ color: var(--ink); font-size: 15px; max-width: 62ch; line-height:1.7; }
.exhibits-foot .mark{ color: var(--red); font-family: var(--font-mono); }

/* ------------------------------- pathways ---------------------------------- */
.pathways-list{ display:flex; flex-direction:column; }
.pathway{
  display:grid; grid-template-columns: 200px 1fr;
  gap: 40px;
  padding: 44px 0;
  border-top: 1px solid var(--paper-line);
}
.pathways-list .pathway:last-child{ border-bottom: 1px solid var(--paper-line); }
.pathway-num{
  font-family: var(--font-mono); font-size: 13px; color: var(--red);
  letter-spacing: 0.05em;
  font-weight: 500;
}
.pathway-num span{ display:block; color: var(--stone-light); font-size: 12px; margin-top: 6px; letter-spacing: 0.04em;}
.pathway h3{ font-size: 1.45rem; margin-bottom: 14px; color: var(--ink); }
.pathway p.desc{ color: var(--stone); font-size: 16px; line-height: 1.75; max-width: 62ch; }
.pathway .signals{ margin-top: 20px; display:flex; flex-wrap:wrap; gap: 10px; }
.pathway .signals span{
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing:0.02em;
  border: 1px solid var(--paper-line); padding: 7px 12px; border-radius: 1px;
  color: var(--ink-soft); background: var(--paper-2);
}
@media (max-width: 720px){ .pathway{ grid-template-columns: 1fr; gap: 12px; } }

/* -------------------------------- photo band --------------------------------- */
.photo-band{
  position: relative;
  padding: 0;
  height: 360px;
  background-size: cover;
  background-position: center 40%;
  background-repeat: no-repeat;
  display:flex; align-items:center; justify-content:center;
  overflow:hidden;
}
.photo-band.bg-photo-mist{ background-image: url('assets/photo-mist.jpg'); }
.photo-band.bg-photo-minimal{ background-image: url('assets/photo-minimal.jpg'); }
.photo-band::before{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.14) 22%, rgba(255,255,255,0.14) 78%, rgba(255,255,255,0.92) 100%);
}
.photo-band-caption{
  position:relative;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  color: var(--ink);
  text-align:center;
  max-width: 30ch;
  padding: 14px 26px;
  background: rgba(255,255,255,0.74);
  backdrop-filter: blur(6px);
  border-radius: 1px;
}
@media (max-width: 640px){ .photo-band{ height: 260px; } }

/* -------------------------------- advantage --------------------------------- */
.advantage{ background: var(--paper-2); border-top:1px solid var(--paper-line); border-bottom:1px solid var(--paper-line); }
.advantage-grid{
  display:grid; grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--paper-line);
  border: 1px solid var(--paper-line);
}
.advantage-card{
  background: var(--paper);
  padding: 38px 36px;
}
.advantage-card .tag{ font-family: var(--font-mono); font-size: 11px; color: var(--red); letter-spacing:0.08em; text-transform:uppercase; margin-bottom: 14px; display:block;}
.advantage-card h3{ font-size: 1.3rem; margin-bottom: 12px; color: var(--ink); }
.advantage-card p{ color: var(--stone); font-size: 15px; line-height:1.7; }
@media (max-width: 720px){ .advantage-grid{ grid-template-columns: 1fr; } }

/* -------------------------------- sectors ----------------------------------- */
.sector-grid{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--paper-line); border: 1px solid var(--paper-line); }
.sector{ background: var(--paper); padding: 30px 26px; min-height: 180px; display:flex; flex-direction:column; gap:12px; border-left: 2px solid var(--paper-3); }
.sector-index{ font-family: var(--font-mono); font-size: 11px; color: var(--stone-light); text-transform: uppercase; letter-spacing: 0.04em; }
.sector h4{ font-size: 1.05rem; color: var(--ink); font-weight:700; }
.sector p{ font-size: 13.5px; color: var(--stone); line-height:1.6; }
@media (max-width: 980px){ .sector-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px){ .sector-grid{ grid-template-columns: 1fr; } }

/* ---------------------------------- CTA band --------------------------------- */
.cta-band{
  background: var(--paper-3);
  border-top: 1px solid var(--paper-line);
}
.cta-band .wrap{
  display:flex; align-items:center; justify-content:space-between; gap: 28px; flex-wrap:wrap;
  padding-top: 20px; padding-bottom: 20px;
}
.cta-band h2{ font-size: clamp(1.5rem, 2.6vw, 2.1rem); max-width: 22ch; line-height:1.25; color: var(--ink); }
.cta-band-right{ display:flex; align-items:center; gap:18px; flex-wrap:wrap; }

/* ---------------------------------- footer ------------------------------------ */
.site-footer{ background: var(--ink); color: var(--ink-muted); padding: 56px 0 34px; }
.site-footer .wrap{ display:flex; justify-content:space-between; gap: 30px; flex-wrap:wrap; }
.footer-brand{ display:flex; gap:14px; align-items:flex-start; }
.footer-brand .seal-mini{ width:36px; height:36px; margin-top:2px; }
.footer-brand h3{ color: var(--paper); font-size: 1.15rem; }
.footer-brand p{ font-size: 13px; margin-top: 6px; color: var(--ink-faint); max-width: 30ch; }
.footer-links{ display:flex; gap: 64px; flex-wrap:wrap; }
.footer-col h5{ font-family: var(--font-mono); font-size:11px; text-transform:uppercase; letter-spacing:0.1em; color: var(--red); margin-bottom:14px; }
.footer-col a, .footer-col p{ display:block; font-size: 14px; color: var(--ink-muted); margin-bottom: 9px; }
.footer-col a:hover{ color: var(--paper); }
.footer-bottom{
  margin-top: 48px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 12.5px; color: var(--ink-faint); display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
}

/* --------------------------------- reveal-on-scroll ---------------------------------- */
.reveal{ opacity:0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.is-visible{ opacity:1; transform:none; }

/* --------------------------------- page hero (sub pages) ---------------------------------- */
.page-hero{
  padding: 92px 0 72px;
  position:relative; overflow:hidden;
  background-color: var(--paper);
  background-size: cover;
  background-position: center 35%;
  background-repeat: no-repeat;
}
.page-hero.bg-photo-mist{
  background-image:
    linear-gradient(175deg, rgba(255,255,255,0.96), rgba(255,255,255,0.91) 45%, rgba(255,255,255,0.97)),
    url('assets/photo-mist.jpg');
}
.page-hero.bg-photo-clear{
  background-image:
    linear-gradient(175deg, rgba(255,255,255,0.96), rgba(255,255,255,0.91) 45%, rgba(255,255,255,0.97)),
    url('assets/photo-clear.jpg');
}
.page-hero .wrap{ position:relative; }
.page-hero h1{ font-size: clamp(1.9rem, 3.6vw, 2.8rem); max-width: 20ch; line-height:1.18; margin-top: 20px; color: var(--ink); }
.page-hero p{ margin-top: 22px; max-width: 54ch; color: var(--stone); font-size: 17px; line-height:1.7; }

/* --------------------------------- about page ---------------------------------- */
.founder{ display:grid; grid-template-columns: 0.85fr 1.15fr; gap: 60px; align-items:start; }
.founder-card{
  background: var(--ink); color: var(--paper);
  padding: 40px 34px;
  position:relative;
  border-radius: 1px;
}
.founder-card .seal-mini{ width:46px; height:46px; margin-bottom: 26px; }
.founder-card h3{ font-size: 1.4rem; }
.founder-card .role{ font-family: var(--font-mono); font-size:12px; color: var(--red); margin-top: 8px; letter-spacing:0.04em; }
.founder-card hr{ border:none; border-top:1px solid rgba(255,255,255,0.14); margin: 26px 0; }
.founder-card ul li{ font-size: 14px; color: var(--ink-muted); padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.09); }
.founder-card ul li:last-child{ border-bottom:none; }
.founder-card ul li b{ color: var(--paper); font-weight:700; display:block; margin-bottom:3px; font-family: var(--font-display); font-size: 15px;}
.founder-body p{ font-size: 17px; line-height:1.85; color: var(--ink); }
.founder-body p + p{ margin-top: 20px; }
@media (max-width: 860px){ .founder{ grid-template-columns:1fr; } }

.principles{ background: var(--paper-2); border-top:1px solid var(--paper-line); border-bottom:1px solid var(--paper-line); }
.principles-grid{ display:grid; grid-template-columns: repeat(4,1fr); gap: 30px; margin-top: 46px; }
.principle .num{ font-family: var(--font-mono); font-size:13px; font-weight:500; color: var(--red); }
.principle h4{ font-size: 1.1rem; margin: 12px 0 10px; color: var(--ink); }
.principle p{ font-size:14px; color: var(--stone); line-height:1.65; }
@media (max-width: 860px){ .principles-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 540px){ .principles-grid{ grid-template-columns: 1fr; } }

/* --------------------------------- contact page ---------------------------------- */
.contact-grid{ display:grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
.contact-info h2{ font-size: 1.8rem; color: var(--ink); }
.contact-info p{ margin-top: 16px; color: var(--stone); font-size: 16px; line-height:1.8; }
.contact-email{
  margin-top: 30px; display:inline-flex; align-items:center; gap: 12px;
  font-family: var(--font-mono); font-size: 15px; padding: 16px 20px;
  border: 1px solid var(--paper-line); background: var(--paper-2); color: var(--ink);
}
.confidential-note{
  margin-top: 34px; padding: 22px 24px; border-left: 2px solid var(--red);
  background: var(--red-pale);
}
.confidential-note .tag{ font-family: var(--font-mono); font-size:11px; color: var(--red-deep); text-transform:uppercase; letter-spacing:0.08em; display:block; margin-bottom:10px; }
.confidential-note p{ font-size: 14px; color: var(--ink); line-height:1.7; margin:0; }
.form-frame-wrap{ border: 1px solid var(--paper-line); background: var(--paper-2); padding: 8px; }
.form-frame-wrap iframe{ width:100%; height: 920px; border:none; background: var(--paper); }
@media (max-width: 900px){ .contact-grid{ grid-template-columns:1fr; } .form-frame-wrap iframe{ height: 1180px; } }

.contact-meta{ margin-top: 40px; display:flex; gap: 40px; flex-wrap:wrap; }
.contact-meta div h5{ font-family: var(--font-mono); font-size:11px; text-transform:uppercase; letter-spacing:0.08em; color: var(--red); margin-bottom: 8px; }
.contact-meta div p{ font-size: 14.5px; color: var(--ink); }