@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@500;700&family=Noto+Sans+JP:wght@300;400;500;700&family=Roboto+Mono:wght@400;500&display=swap');

:root{
  --navy: #14213D;
  --navy-soft: #223357;
  --sage: #55705F;
  --paper: #F2F3EF;
  --paper-deep: #E9EAE3;
  --seal: #A6402F;
  --ink: #1C1C1C;
  --ink-soft: #55574F;
  --line: #D3D5C9;
  --max-w: 1080px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Noto Sans JP', sans-serif;
  font-weight:400;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{
  font-family:'Shippori Mincho', serif;
  font-weight:700;
  color:var(--navy);
  line-height:1.5;
  margin:0 0 .6em;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
.mono{font-family:'Roboto Mono', monospace;letter-spacing:.03em;}

.wrap{max-width:var(--max-w); margin:0 auto; padding:0 28px;}

/* ---------- Header ---------- */
.site-header{
  border-bottom:1px solid var(--line);
  background:var(--paper);
  position:sticky; top:0; z-index:50;
}
.site-header .wrap{
  display:flex; align-items:center; justify-content:space-between;
  padding-top:18px; padding-bottom:18px;
}
.brand{display:flex; flex-direction:column; gap:2px;}
.brand-ja{font-family:'Shippori Mincho', serif; font-weight:700; font-size:1.15rem; color:var(--navy);}
.brand-en{font-family:'Roboto Mono', monospace; font-size:.68rem; letter-spacing:.12em; color:var(--ink-soft); text-transform:uppercase;}

nav.mainnav ul{
  list-style:none; display:flex; gap:26px; margin:0; padding:0;
}
nav.mainnav a{
  font-size:.86rem; color:var(--ink-soft); position:relative; padding-bottom:4px;
  transition:color .2s ease;
}
nav.mainnav a::before{
  content:attr(data-mod);
  font-family:'Roboto Mono', monospace;
  font-size:.68rem;
  color:var(--sage);
  margin-right:6px;
}
nav.mainnav a:hover, nav.mainnav a.active{color:var(--navy);}
nav.mainnav a.active::after{
  content:''; position:absolute; left:0; right:0; bottom:0; height:2px; background:var(--seal);
}
.navtoggle{display:none;}

@media (max-width:760px){
  nav.mainnav ul{
    position:fixed; inset:64px 0 auto 0; flex-direction:column; gap:0;
    background:var(--paper); border-bottom:1px solid var(--line);
    max-height:0; overflow:hidden; transition:max-height .25s ease;
  }
  nav.mainnav ul.open{max-height:400px;}
  nav.mainnav li{border-top:1px solid var(--line);}
  nav.mainnav a{display:block; padding:16px 28px;}
  .navtoggle{
    display:block; background:none; border:1px solid var(--line); border-radius:2px;
    width:38px; height:34px; position:relative; cursor:pointer;
  }
  .navtoggle span, .navtoggle span::before, .navtoggle span::after{
    content:''; position:absolute; left:9px; right:9px; height:1.5px; background:var(--navy);
  }
  .navtoggle span{top:16px;}
  .navtoggle span::before{top:-6px;}
  .navtoggle span::after{top:6px;}
}

/* ---------- Cover / hero (dossier cover sheet) ---------- */
.cover{
  border-bottom:1px solid var(--line);
  padding:64px 0 56px;
}
.cover-frame{
  border:1px solid var(--line);
  padding:40px clamp(20px,5vw,64px);
  position:relative;
}
.cover-frame::before{
  content:attr(data-ref);
  position:absolute; top:-11px; left:24px; background:var(--paper);
  padding:0 10px; font-family:'Roboto Mono', monospace; font-size:.7rem; color:var(--sage);
  letter-spacing:.08em;
}
.cover-eyebrow{
  font-family:'Roboto Mono', monospace; font-size:.72rem; color:var(--seal);
  letter-spacing:.14em; text-transform:uppercase; margin-bottom:18px;
}
.cover h1{font-size:clamp(1.7rem,4vw,2.5rem); max-width:14ch;}
.cover-lede{font-size:1.02rem; color:var(--ink-soft); max-width:52ch; margin-top:14px;}
.cover-meta{
  margin-top:34px; padding-top:22px; border-top:1px dashed var(--line);
  display:grid; grid-template-columns:repeat(auto-fit,minmax(160px,1fr)); gap:18px;
}
.cover-meta dt{font-family:'Roboto Mono', monospace; font-size:.65rem; color:var(--sage); letter-spacing:.08em; text-transform:uppercase;}
.cover-meta dd{margin:4px 0 0; font-size:.9rem;}

/* ---------- Page header (non-home) ---------- */
.page-cover{padding:52px 0 40px; border-bottom:1px solid var(--line);}
.page-eyebrow{font-family:'Roboto Mono', monospace; font-size:.72rem; color:var(--sage); letter-spacing:.14em; text-transform:uppercase; margin-bottom:10px;}
.page-cover h1{font-size:clamp(1.5rem,3.4vw,2.1rem);}
.page-lede{color:var(--ink-soft); max-width:56ch; margin-top:10px;}

/* ---------- Module sections ---------- */
.module{padding:56px 0; border-bottom:1px solid var(--line);}
.module:last-of-type{border-bottom:none;}
.module-head{display:flex; align-items:baseline; gap:16px; margin-bottom:28px;}
.module-num{font-family:'Roboto Mono', monospace; color:var(--seal); font-size:.95rem; white-space:nowrap;}
.module-head h2{margin:0; font-size:1.4rem;}

.grid-2{display:grid; grid-template-columns:1fr 1fr; gap:36px;}
.grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:28px;}
@media (max-width:760px){.grid-2,.grid-3{grid-template-columns:1fr;}}

.card{
  border:1px solid var(--line); padding:26px; background:var(--paper);
}
.card .card-num{font-family:'Roboto Mono', monospace; font-size:.72rem; color:var(--sage); display:block; margin-bottom:10px;}
.card h3{font-size:1.05rem; margin-bottom:.5em;}
.card p{font-size:.92rem; color:var(--ink-soft); margin:0;}

ul.plain{list-style:none; margin:0; padding:0;}
ul.spec{list-style:none; margin:0; padding:0;}
ul.spec li{
  display:grid; grid-template-columns:9em 1fr; gap:18px;
  padding:14px 0; border-top:1px solid var(--line); font-size:.92rem;
}
ul.spec li:first-child{border-top:none;}
ul.spec .k{font-family:'Roboto Mono', monospace; font-size:.72rem; color:var(--sage); padding-top:2px;}

/* ---------- Seal / stamp signature element ---------- */
.seal{
  width:92px; height:92px; border-radius:50%;
  border:2px solid var(--seal); color:var(--seal);
  display:flex; align-items:center; justify-content:center; text-align:center;
  font-family:'Shippori Mincho', serif; font-weight:700; font-size:.78rem; line-height:1.3;
  transform:rotate(-6deg); flex:none;
  position:relative;
}
.seal::before{
  content:''; position:absolute; inset:6px; border:1px solid var(--seal); border-radius:50%; opacity:.55;
}
.seal-row{display:flex; align-items:center; gap:22px;}

/* ---------- Timeline (achievements) ---------- */
.timeline{list-style:none; margin:0; padding:0;}
.timeline li{
  display:grid; grid-template-columns:7em 1fr; gap:22px;
  padding:22px 0; border-top:1px solid var(--line);
}
.timeline li:first-child{border-top:none;}
.timeline .date{font-family:'Roboto Mono', monospace; font-size:.78rem; color:var(--sage); padding-top:3px;}
.timeline h3{font-size:1rem; margin-bottom:.35em;}
.timeline p{margin:0; color:var(--ink-soft); font-size:.9rem;}
.tag{
  display:inline-block; font-family:'Roboto Mono', monospace; font-size:.65rem;
  border:1px solid var(--sage); color:var(--sage); padding:2px 8px; margin-top:8px; letter-spacing:.05em;
}

/* ---------- Profile ---------- */
.profile-block{display:grid; grid-template-columns:200px 1fr; gap:40px; align-items:start;}
@media (max-width:760px){.profile-block{grid-template-columns:1fr;}}
.avatar-plate{
  aspect-ratio:1/1; background:var(--navy); position:relative; overflow:hidden;
}
.avatar-plate svg{width:100%;height:100%;}

/* ---------- Notice / disclaimer ---------- */
.notice{
  border:1px dashed var(--line); padding:18px 22px; font-size:.84rem; color:var(--ink-soft);
  background:var(--paper-deep);
}

/* ---------- Contact form ---------- */
form.contact-form{display:grid; gap:20px; max-width:560px;}
.field{display:grid; gap:6px;}
.field label{font-family:'Roboto Mono', monospace; font-size:.72rem; color:var(--sage); letter-spacing:.05em;}
.field input, .field textarea, .field select{
  border:1px solid var(--line); background:var(--paper); padding:11px 12px;
  font-family:'Noto Sans JP', sans-serif; font-size:.92rem; color:var(--ink);
}
.field textarea{resize:vertical; min-height:120px;}
.btn{
  justify-self:start; background:var(--navy); color:var(--paper); border:none;
  padding:13px 30px; font-family:'Roboto Mono', monospace; font-size:.78rem; letter-spacing:.08em;
  cursor:pointer; text-transform:uppercase; transition:background .2s ease;
}
.btn:hover{background:var(--navy-soft);}

/* ---------- Footer ---------- */
footer.site-footer{
  border-top:1px solid var(--line); padding:40px 0; margin-top:20px;
}
footer.site-footer .wrap{
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:14px;
}
footer .f-brand{font-family:'Shippori Mincho', serif; color:var(--navy); font-size:.95rem;}
footer .f-meta{font-family:'Roboto Mono', monospace; font-size:.68rem; color:var(--ink-soft);}