/* =========================================================
   NEXUS Web Design / Design tokens
========================================================= */
:root{
  --paper: #EDF1E8;
  --paper-alt: #E2E9DB;
  --card: #FBFBF6;
  --ink: #16231C;
  --ink-soft: #435046;
  --ink-faint: #7C8A7E;
  --line: #CDD6C6;
  --amber: #D79A3B;
  --amber-deep: #B87F26;
  --sage: #6E8F74;
  --sage-deep: #4C6B52;
  --white: #FFFFFF;

  --font-display: "Shippori Mincho", serif;
  --font-body: "Zen Kaku Gothic New", sans-serif;
  --font-mono: "Space Mono", monospace;

  --radius: 4px;
  --container: 1160px;
  --shadow-card: 0 1px 0 rgba(22,35,28,0.06), 0 12px 24px -18px rgba(22,35,28,0.35);
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

h1,h2,h3{
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0 0 0.5em;
  font-weight: 600;
  letter-spacing: 0.01em;
}

p{ margin: 0 0 1em; color: var(--ink-soft); }

a{ color: inherit; text-decoration: none; }

img, svg{ display:block; max-width:100%; }

.wrap{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.wrap-narrow{ max-width: 760px; }

/* faint paper grain */
.grain{
  position: fixed; inset: 0; pointer-events: none; z-index: 0; opacity: .5;
  background-image: radial-gradient(rgba(22,35,28,0.035) 1px, transparent 1px);
  background-size: 3px 3px;
  mix-blend-mode: multiply;
}

/* =========================================================
   Buttons
========================================================= */
.btn{
  display: inline-flex; align-items:center; justify-content:center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease;
}
.btn:hover{ transform: translateY(-1px); }
.btn:active{ transform: translateY(0); }
.btn-primary{
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-primary:hover{ background: var(--sage-deep); border-color: var(--sage-deep); }
.btn-ghost{
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn-ghost:hover{ background: var(--ink); color: var(--paper); }
.btn-block{ width: 100%; }
.btn-small{ padding: 10px 20px; font-size: 0.85rem; }

/* =========================================================
   Header
========================================================= */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(237,241,232,0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; gap: 28px;
  height: 76px;
}
.logo{ display:flex; align-items:center; gap:10px; margin-right: auto; }
.logo-mark{
  width: 38px; height: 38px; border-radius: 50%;
  border: 1.5px solid var(--ink);
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  flex: 0 0 auto;
}
.logo-text{ display:flex; flex-direction:column; line-height:1.1; }
.logo-jp{ font-family: var(--font-display); font-size: 1rem; font-weight:600; }
.logo-en{ font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.12em; color: var(--ink-faint); }

.nav{ display:flex; align-items:center; gap: 28px; font-size: 0.92rem; }
.nav a{ position: relative; padding: 4px 0; color: var(--ink-soft); }
.nav a:hover{ color: var(--ink); }
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:1px;
  background: var(--amber-deep); transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.nav a:hover::after{ transform: scaleX(1); }

.nav-toggle{ display:none; background:none; border:none; cursor:pointer; padding: 8px; }
.nav-toggle span{ display:block; width:22px; height:2px; background: var(--ink); margin: 4px 0; }

/* =========================================================
   Hero
========================================================= */
.hero{ padding: 76px 0 90px; position: relative; z-index:1; }
.hero-inner{
  display:grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items:center;
}
.eyebrow{
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em;
  color: var(--sage-deep); text-transform: uppercase; margin-bottom: 18px;
}
.hero-title{
  font-size: clamp(2.1rem, 4.2vw, 3.2rem);
  line-height: 1.45;
  margin-bottom: 24px;
}
.hero-title em{ font-style: normal; color: var(--amber-deep); }
.hero-lead{ font-size: 1.02rem; max-width: 46ch; margin-bottom: 28px; }
.hero-actions{ display:flex; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }
.hero-notes{
  list-style:none; padding:0; margin:0; display:flex; gap: 20px; flex-wrap:wrap;
  font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-faint);
}
.hero-notes li::before{ content:"— "; }

.hero-visual{ position:relative; display:flex; flex-direction:column; align-items:center; gap: 18px; }
.stamp{ position: relative; width: 200px; height: 200px; }
.stamp-ring{ width:100%; height:100%; animation: spin 26s linear infinite; }
.stamp-ring path{ fill:none; }
.stamp-ring text{
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 2px;
  fill: var(--sage-deep);
}
@keyframes spin{ to{ transform: rotate(360deg); } }
.stamp-center{
  position:absolute; inset: 26px;
  border: 1.5px solid var(--amber-deep);
  border-radius: 50%;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  background: var(--card);
}
.stamp-vol{ font-family: var(--font-mono); font-size: 0.65rem; color: var(--ink-faint); }
.stamp-num{ font-family: var(--font-display); font-size: 2.1rem; color: var(--ink); line-height:1; }
.stamp-label{ font-family: var(--font-mono); font-size: 0.6rem; letter-spacing:0.1em; color: var(--amber-deep); margin-top:4px; }

.hero-graph{ width: 100%; max-width: 360px; height: auto; }
.hero-graph-line{
  fill:none; stroke: var(--sage-deep); stroke-width: 2.5;
  stroke-linecap: round; stroke-linejoin: round;
  stroke-dasharray: 620; stroke-dashoffset: 620;
  animation: draw 2.2s ease forwards 0.4s;
}
@keyframes draw{ to{ stroke-dashoffset: 0; } }
.hero-graph-dots circle{ fill: var(--paper); stroke: var(--sage-deep); stroke-width: 2; }
.hero-graph-dots .dot-latest{ fill: var(--amber-deep); stroke: var(--amber-deep); }
.hero-graph-caption{ font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-faint); margin:0; }

/* =========================================================
   Section shared
========================================================= */
section{ position: relative; z-index: 1; padding: 90px 0; }
.section-eyebrow{
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em;
  color: var(--sage-deep); text-transform: uppercase; margin-bottom: 10px;
}
.section-title{ font-size: clamp(1.5rem, 2.6vw, 2.05rem); max-width: 24ch; }
.section-lead{ max-width: 62ch; font-size: 1rem; }

/* =========================================================
   Pains
========================================================= */
.pains{ background: var(--paper-alt); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.pain-grid{
  margin-top: 40px;
  display:grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.pain-card{
  background: var(--paper-alt);
  padding: 32px 26px;
}
.pain-icon{ width: 34px; height:34px; color: var(--amber-deep); margin-bottom: 18px; }
.pain-card h3{ font-size: 1.02rem; margin-bottom: 10px; }
.pain-card p{ font-size: 0.9rem; margin:0; }

/* =========================================================
   Service / issue grid
========================================================= */
.issue-grid{
  margin-top: 44px;
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.issue-card{
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
}
.issue-tag{
  display:inline-block; font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--amber-deep); border: 1px solid var(--amber-deep);
  border-radius: 999px; padding: 2px 10px; margin-bottom: 14px;
}
.issue-card h3{ font-size: 1.02rem; margin-bottom: 8px; }
.issue-card p{ font-size: 0.9rem; margin:0; }

/* =========================================================
   Flow timeline (signature)
========================================================= */
.flow{ background: var(--paper); }
.timeline{ position:relative; margin-top: 56px; padding-left: 8px; }
.timeline-line{
  position:absolute; left: 76px; top: 10px; bottom: 10px; width: 2px;
  background: var(--line);
}
.timeline-line-fill{
  position:absolute; left:0; top:0; width:100%; height:0%;
  background: var(--sage-deep);
  transition: height 1.4s ease;
}
.t-item{
  position:relative; display:grid; grid-template-columns: 76px 1fr; gap: 32px;
  padding: 28px 0;
  opacity: 0; transform: translateY(14px);
  transition: opacity .6s ease, transform .6s ease;
}
.t-item.in-view{ opacity:1; transform: translateY(0); }
.t-mark{
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--ink);
  text-align:right; padding-top: 3px; position:relative;
}
.t-mark::after{
  content:""; position:absolute; right:-37px; top: 6px;
  width: 10px; height:10px; border-radius:50%;
  background: var(--paper); border: 2px solid var(--sage-deep);
}
.t-item-continuous .t-mark::after{ border-color: var(--amber-deep); background: var(--amber-deep); }
.t-body h3{ font-size: 1.08rem; margin-bottom: 8px; }
.t-body p{ font-size: 0.92rem; max-width: 56ch; margin-bottom: 8px; }
.t-time{ font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-faint); }
.t-item-continuous .t-body h3{ color: var(--amber-deep); }

/* =========================================================
   Pricing
========================================================= */
.pricing{ background: var(--paper-alt); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.plan-grid{
  margin-top: 46px;
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  align-items: stretch;
}
.plan-card{
  position:relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 28px;
  display:flex; flex-direction:column;
  box-shadow: var(--shadow-card);
}
.plan-card-featured{
  border-color: var(--amber-deep);
  transform: translateY(-8px);
}
.plan-badge{
  position:absolute; top:-13px; left: 28px;
  background: var(--amber-deep); color: var(--white);
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em;
  padding: 5px 12px; border-radius: 999px;
}
.plan-eyebrow{ font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-faint); margin: 0 0 6px; }
.plan-name{ font-size: 1.25rem; margin-bottom: 8px; }
.plan-desc{ font-size: 0.88rem; min-height: 3.4em; }
.plan-price{ font-family: var(--font-mono); font-size: 2.1rem; color: var(--ink); margin: 12px 0 22px; }
.plan-price .cur{ font-size: 1.1rem; vertical-align: top; margin-right: 2px; }
.plan-price .per{ font-size: 0.9rem; color: var(--ink-faint); font-family: var(--font-body); }
.plan-list{ list-style:none; margin:0 0 26px; padding:0; flex:1; }
.plan-list li{
  font-size: 0.9rem; color: var(--ink-soft);
  padding: 9px 0 9px 22px; border-top: 1px dashed var(--line);
  position: relative;
}
.plan-list li:first-child{ border-top:none; }
.plan-list li::before{
  content:"○"; position:absolute; left:0; top:9px; font-size: 0.65rem; color: var(--sage-deep);
}
.plan-footnote{ margin-top: 28px; font-size: 0.8rem; color: var(--ink-faint); }

/* =========================================================
   Cases
========================================================= */
.case-grid{ margin-top: 44px; display:grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.case-card{
  background: var(--card); border:1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px;
}
.case-vol{ font-family: var(--font-mono); font-size: 0.7rem; color: var(--amber-deep); margin-bottom: 10px; }
.case-card h3{ font-size: 1.02rem; margin-bottom: 14px; }
.case-quote{
  font-family: var(--font-display); font-size: 1rem; color: var(--ink);
  border-left: 2px solid var(--sage-deep); padding-left: 14px; margin-bottom: 14px;
}
.case-detail{ font-size: 0.86rem; margin:0; }

/* =========================================================
   FAQ
========================================================= */
.faq-list{ margin-top: 40px; border-top: 1px solid var(--line); }
.faq-item{ border-bottom: 1px solid var(--line); padding: 20px 0; }
.faq-item summary{
  cursor:pointer; font-weight: 700; font-size: 0.98rem;
  list-style:none; display:flex; align-items:center; justify-content:space-between;
}
.faq-item summary::-webkit-details-marker{ display:none; }
.faq-item summary::after{
  content:"+"; font-family: var(--font-mono); font-size:1.2rem; color: var(--amber-deep);
  transition: transform .2s ease;
}
.faq-item[open] summary::after{ transform: rotate(45deg); }
.faq-item p{ margin: 14px 0 0; font-size: 0.92rem; }

/* =========================================================
   Contact
========================================================= */
.contact-form{
  margin-top: 40px;
  display:grid; grid-template-columns: 1fr 1fr; gap: 20px 24px;
}
.form-row-full{ grid-column: 1 / -1; }
.form-row label{
  display:block; font-size: 0.85rem; font-weight:700; margin-bottom: 8px;
}
.req{
  font-family: var(--font-mono); font-size: 0.65rem; color: var(--amber-deep);
  border: 1px solid var(--amber-deep); border-radius: 3px; padding: 1px 6px; margin-left: 8px;
}
.form-row input, .form-row select, .form-row textarea{
  width: 100%; padding: 12px 14px; font-family: var(--font-body); font-size: 0.95rem;
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); color: var(--ink);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus{
  outline: 2px solid var(--sage-deep); outline-offset: 1px;
}
.form-success{
  margin-top: 24px; padding: 20px 24px; background: var(--paper-alt);
  border: 1px solid var(--sage-deep); border-radius: var(--radius);
}
.form-success p{ margin:0; color: var(--ink); }
.contact-note{ margin-top: 20px; font-size: 0.78rem; color: var(--ink-faint); }

/* =========================================================
   Footer
========================================================= */
.site-footer{ background: var(--ink); color: var(--paper); padding: 56px 0 40px; }
.site-footer .logo-mark{ border-color: var(--paper); }
.site-footer .logo-jp{ color: var(--paper); }
.site-footer .logo-en{ color: rgba(237,241,232,0.55); }
.footer-inner{ display:flex; flex-wrap:wrap; align-items:center; gap: 24px; justify-content:space-between; }
.footer-nav{ display:flex; flex-wrap:wrap; gap: 20px; font-size: 0.86rem; }
.footer-nav a{ color: rgba(237,241,232,0.75); }
.footer-nav a:hover{ color: var(--paper); }
.footer-copy{ width:100%; margin-top: 20px; font-size: 0.74rem; color: rgba(237,241,232,0.5); }

/* =========================================================
   Focus visibility
========================================================= */
a:focus-visible, button:focus-visible, .btn:focus-visible{
  outline: 2px solid var(--amber-deep); outline-offset: 2px;
}

/* =========================================================
   Responsive
========================================================= */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ order:-1; }
  .pain-grid{ grid-template-columns: repeat(2,1fr); }
  .issue-grid{ grid-template-columns: repeat(2,1fr); }
  .plan-grid{ grid-template-columns: 1fr; }
  .plan-card-featured{ transform:none; }
  .case-grid{ grid-template-columns: 1fr; }
  .contact-form{ grid-template-columns: 1fr; }
}

@media (max-width: 720px){
  .nav{
    display:none;
    position:absolute; top: 64px; left:0; right:0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items:flex-start; gap: 0; padding: 8px 24px 20px;
  }
  .nav.open{ display:flex; }
  .nav a{ width:100%; padding: 12px 0; border-bottom: 1px dashed var(--line); }
  .btn-small{ display:none; }
  .nav-toggle{ display:block; }
  .header-inner{ height: 64px; }
  .hero{ padding: 48px 0 60px; }
  section{ padding: 60px 0; }
  .pain-grid{ grid-template-columns: 1fr; }
  .issue-grid{ grid-template-columns: 1fr; }
  .timeline-line{ left: 54px; }
  .t-item{ grid-template-columns: 54px 1fr; gap: 18px; }
  .t-mark::after{ right: -25px; }
}