@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Newsreader:ital,wght@0,400;0,500;1,400&display=swap');

:root{
  --paper:#EFF1EB;
  --paper-line:#DADFD6;
  --ink:#1C2622;
  --ink-soft:#4B564F;
  --rule:#C8CFC4;
  --amber:#C1892C;
  --amber-soft:#E7D2A4;
  --accent:#C1892C; /* 六曜により日替わりで上書きされる */
  --navy:#2C4A5E;
  --navy-soft:#B9CBD3;
  --hole:#D3D8CD;
  --hole-ring:#B9C0B3;
  --margin:64px;
  --max:920px;
}

*{box-sizing:border-box;}

html{scroll-behavior:smooth;}

body{
  margin:0;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0px, transparent 27px, var(--paper-line) 28px
    ),
    var(--paper);
  color:var(--ink);
  font-family:'Newsreader', serif;
  font-size:17px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}

/* ---- notebook page chrome ---- */

.page-frame{
  position:relative;
  max-width:1180px;
  margin:0 auto;
  padding-left:var(--margin);
  min-height:100vh;
}

.margin-rule{
  position:absolute;
  top:0; bottom:0;
  left: calc(var(--margin) - 18px);
  width:2px;
  background:var(--accent);
  opacity:0.55;
}

.punch-holes{
  position:absolute;
  left:22px;
  top:120px;
  display:flex;
  flex-direction:column;
  gap:120px;
}
.punch-holes span{
  width:14px;height:14px;border-radius:50%;
  background:var(--hole);
  box-shadow:inset 0 0 0 1px var(--hole-ring);
  display:block;
}

.notebook-tab{
  position:absolute;
  top:0;
  right:40px;
  background:var(--ink);
  color:var(--paper);
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  letter-spacing:0.12em;
  padding:8px 14px;
  border-radius:0 0 6px 6px;
  text-transform:uppercase;
}

/* ---- header/nav ---- */

header.site-header{
  padding:56px 48px 20px 8px;
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  flex-wrap:wrap;
  gap:16px;
  border-bottom:1px solid var(--rule);
}

.brand-row{
  display:flex;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
}

.brand{
  font-family:'IBM Plex Mono',monospace;
  font-weight:600;
  font-size:15px;
  letter-spacing:0.02em;
}
.brand span{color:var(--accent);}

/* ---- 六曜メモ（さりげなく表記） ---- */

.rokuyo-note{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--ink-soft);
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  letter-spacing:0.04em;
  white-space:nowrap;
}
.rokuyo-note .rokuyo-date{opacity:0.75;}
.rokuyo-note .rokuyo-dot{
  width:5px;height:5px;border-radius:50%;
  background:var(--accent);
  display:inline-block;
}
.rokuyo-note .rokuyo-name{color:var(--ink-soft);}

nav.site-nav{
  display:flex;
  gap:28px;
  font-family:'IBM Plex Mono',monospace;
  font-size:12.5px;
  letter-spacing:0.06em;
  text-transform:uppercase;
}
nav.site-nav a{
  color:var(--ink-soft);
  text-decoration:none;
  padding-bottom:4px;
  border-bottom:2px solid transparent;
}
nav.site-nav a:hover, nav.site-nav a.current{
  color:var(--ink);
  border-bottom-color:var(--accent);
}

main{padding:0 48px 90px 8px;}

/* ---- generic type ---- */

.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--navy);
  display:flex;
  align-items:center;
  gap:10px;
  margin:48px 0 10px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;background:var(--navy);
  display:inline-block;
}

h1{
  font-family:'IBM Plex Mono',monospace;
  font-weight:700;
  font-size:clamp(30px, 4.4vw, 52px);
  line-height:1.28;
  letter-spacing:-0.01em;
  margin:0 0 22px;
}

h2{
  font-family:'IBM Plex Mono',monospace;
  font-weight:600;
  font-size:22px;
  margin:0 0 14px;
}

p{margin:0 0 18px; max-width:62ch; color:var(--ink);}
p.lede{font-size:19px; color:var(--ink-soft); max-width:56ch;}

a.textlink{color:var(--navy); text-decoration-color:var(--navy-soft); text-underline-offset:3px;}

/* ---- hero diagram ---- */

.hero{
  padding:36px 0 20px;
  max-width:var(--max);
}

.bridge-diagram{
  margin:36px 0 8px;
  max-width:640px;
}
.bridge-diagram .node-label{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  letter-spacing:0.04em;
}

/* ---- cards / lists ---- */

.service-list{
  list-style:none; margin:20px 0 0; padding:0;
  display:grid; gap:0;
  max-width:var(--max);
}
.service-item{
  display:grid;
  grid-template-columns:64px 1fr;
  gap:22px;
  padding:26px 0;
  border-top:1px solid var(--rule);
}
.service-item:last-child{border-bottom:1px solid var(--rule);}
.service-tag{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  color:var(--accent);
  letter-spacing:0.06em;
  padding-top:3px;
}
.service-item h2{margin-bottom:8px;}
.service-item p{margin-bottom:0;}

/* ---- footer ---- */

footer{
  border-top:1px solid var(--rule);
  padding:30px 48px 40px 8px;
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  color:var(--ink-soft);
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
}

/* ---- misc blocks ---- */

.annotation{
  border-left:2px solid var(--accent);
  padding:4px 0 4px 18px;
  color:var(--ink-soft);
  font-size:15px;
  font-style:italic;
  max-width:56ch;
  margin:28px 0;
}

.placeholder-box{
  border:1px dashed var(--rule);
  padding:34px;
  max-width:var(--max);
  color:var(--ink-soft);
  font-size:15px;
  margin-top:24px;
}

.contact-block{
  margin-top:30px;
  padding:32px;
  border:1px solid var(--rule);
  max-width:520px;
  background:rgba(255,255,255,0.35);
}
.contact-block .label{
  font-family:'IBM Plex Mono',monospace;
  font-size:11.5px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--navy);
  margin-bottom:6px;
  display:block;
}
.contact-block a.mail{
  font-family:'IBM Plex Mono',monospace;
  font-size:18px;
  color:var(--ink);
  text-decoration:none;
  border-bottom:2px solid var(--accent);
}

@media (max-width:640px){
  :root{--margin:40px;}
  header.site-header, main, footer{padding-left:0;}
  .punch-holes{display:none;}
  .margin-rule{left:14px;}
  nav.site-nav{gap:16px;}
}

/* ---- お問い合わせフォーム（罫線に書き込む見た目） ---- */

.form-block{max-width:560px; margin-top:36px;}

.field{
  margin-bottom:34px;
  position:relative;
}
.field label{
  display:block;
  font-family:'IBM Plex Mono',monospace;
  font-size:11.5px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--navy);
  margin-bottom:8px;
}
.field .required{color:var(--accent); margin-left:4px;}

.field input[type="text"],
.field input[type="email"],
.field select{
  width:100%;
  border:none;
  border-bottom:1.5px solid var(--ink-soft);
  background:transparent;
  font-family:'Newsreader', serif;
  font-size:17px;
  color:var(--ink);
  padding:6px 2px;
  line-height:28px;
  height:40px;
  outline:none;
  border-radius:0;
  appearance:none;
  -webkit-appearance:none;
}
.field select{cursor:pointer;}

.field input:focus,
.field select:focus,
.field textarea:focus{
  border-bottom-color:var(--accent);
}

.field textarea{
  width:100%;
  border:none;
  border-bottom:1.5px solid var(--ink-soft);
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0px, transparent 27px, var(--paper-line) 28px
    );
  font-family:'Newsreader', serif;
  font-size:17px;
  color:var(--ink);
  padding:6px 2px;
  line-height:28px;
  height:168px;
  resize:vertical;
  outline:none;
  border-radius:0;
}

.field-hint{
  font-size:12.5px;
  color:var(--ink-soft);
  margin-top:10px;
}

.honeypot{
  position:absolute;
  left:-9999px;
  top:auto;
  width:1px;height:1px;
  overflow:hidden;
}

.form-actions{
  display:flex;
  gap:16px;
  margin-top:32px;
  flex-wrap:wrap;
}

.btn{
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  letter-spacing:0.05em;
  padding:12px 26px;
  border-radius:3px;
  cursor:pointer;
  border:1.5px solid var(--ink);
  background:transparent;
  color:var(--ink);
  text-decoration:none;
  display:inline-block;
}
.btn:hover{background:var(--ink); color:var(--paper);}

.btn-primary{
  border-color:var(--accent);
  color:var(--ink);
  background:color-mix(in srgb, var(--accent) 14%, transparent);
}
.btn-primary:hover{
  background:var(--accent);
  color:#fff;
}

.error-box{
  border-left:2px solid #C0392B;
  background:rgba(192,57,43,0.06);
  padding:14px 18px;
  font-size:14px;
  color:#7A2E24;
  margin:20px 0;
  max-width:560px;
}
.error-box ul{margin:6px 0 0; padding-left:18px;}

.confirm-list{
  max-width:560px;
  margin-top:20px;
}
.confirm-row{
  padding:18px 0;
  border-top:1px solid var(--rule);
}
.confirm-row:last-child{border-bottom:1px solid var(--rule);}
.confirm-row .k{
  font-family:'IBM Plex Mono',monospace;
  font-size:11.5px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--navy);
  margin-bottom:4px;
}
.confirm-row .v{white-space:pre-wrap; word-break:break-word;}

.complete-mark{
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  color:var(--accent);
  border:1.5px solid var(--accent);
  display:inline-block;
  padding:6px 14px;
  border-radius:3px;
  transform:rotate(-2deg);
  margin-bottom:20px;
}