/* 電脳考古学 — shared styles (no external dependencies) */
:root{
  --bg:#f6f4ef;          /* parchment */
  --ink:#1b2230;         /* navy ink */
  --muted:#5b6472;       /* secondary text */
  --line:#e2ddd2;        /* hairline */
  --bronze:#a8743b;      /* artifact bronze accent */
  --bronze-d:#8a5d2e;
  --dark:#151b27;        /* dramatic dark sections */
  --dark-2:#1f2735;
  --card:#fffdf9;
  --ok:#2f7d54;
  --warn:#b4452f;
  --maxw:1080px;
  --radius:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic","YuGothic","Meiryo",sans-serif;
  line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased;
}
a{color:var(--bronze-d);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:64px 0}
.section.tight{padding:44px 0}
h1,h2,h3{line-height:1.4;font-weight:800;letter-spacing:.01em}
h2{font-size:1.7rem;margin:0 0 8px}
h2 .lead-sub{display:block;font-size:.95rem;font-weight:600;color:var(--bronze-d);letter-spacing:.12em;margin-bottom:6px}
h3{font-size:1.15rem;margin:0 0 6px}
p{margin:0 0 14px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---- header / nav ---- */
header.site{position:sticky;top:0;z-index:20;background:rgba(246,244,239,.92);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;padding:12px 20px;max-width:var(--maxw);margin:0 auto}
.brand{display:flex;align-items:baseline;gap:10px;font-weight:900;font-size:1.15rem;color:var(--ink)}
.brand .mark{color:var(--bronze)}
.brand small{font-weight:600;font-size:.7rem;color:var(--muted);letter-spacing:.18em}
.menu{display:flex;flex-wrap:wrap;gap:4px 2px;list-style:none;margin:0;padding:0}
.menu a{display:inline-block;padding:8px 12px;border-radius:8px;color:var(--ink);font-size:.92rem;font-weight:600}
.menu a:hover{background:#ece7dc;text-decoration:none}
.menu a[aria-current="page"]{color:var(--bronze-d);background:#f0e7d7}

/* ---- hero ---- */
.hero{
  background:
    linear-gradient(180deg,rgba(21,27,39,.92),rgba(21,27,39,.92)),
    repeating-linear-gradient(0deg,#222a3a 0 6px,#1c2433 6px 13px); /* strata */
  color:#f3efe6;border-bottom:3px solid var(--bronze);
}
.hero .wrap{padding-top:72px;padding-bottom:72px}
.hero .kicker{color:var(--bronze);font-weight:700;letter-spacing:.16em;font-size:.8rem;margin:0 0 14px}
.hero h1{font-size:2.3rem;margin:0 0 18px;color:#fff}
.hero p.sub{font-size:1.12rem;color:#d8d2c4;max-width:760px;margin:0 0 26px}
.hero .ctas{display:flex;gap:12px;flex-wrap:wrap}

/* ---- buttons ---- */
.btn{display:inline-block;padding:13px 22px;border-radius:8px;font-weight:800;font-size:.98rem;border:2px solid transparent;cursor:pointer}
.btn.primary{background:var(--bronze);color:#fff}
.btn.primary:hover{background:var(--bronze-d);text-decoration:none}
.btn.ghost{background:transparent;color:#f3efe6;border-color:#5b6472}
.btn.ghost:hover{border-color:var(--bronze);color:#fff;text-decoration:none}
.btn.dark{background:var(--ink);color:#fff}
.btn.dark:hover{background:#0f1521;text-decoration:none}

/* ---- grids / cards ---- */
.grid{display:grid;gap:18px}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.card h3{color:var(--ink)}
.card .ic{font-size:1.5rem;margin-bottom:6px}
.pain{border-left:4px solid var(--warn)}
.boxed{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}

/* ---- alt section bg ---- */
.alt{background:#efece3}
.dark-sec{background:var(--dark);color:#e9e4d8}
.dark-sec h2{color:#fff}
.dark-sec .muted{color:#a9b0bd}
.dark-sec .card{background:var(--dark-2);border-color:#2c3445;color:#dfe3ea}
.dark-sec .card h3{color:#fff}

/* ---- steps ---- */
.steps{counter-reset:s;display:grid;gap:14px}
.step{display:flex;gap:16px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.step::before{counter-increment:s;content:counter(s);flex:0 0 auto;width:38px;height:38px;border-radius:50%;background:var(--bronze);color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center}

/* ---- pricing table ---- */
table.tbl{width:100%;border-collapse:collapse;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
table.tbl th,table.tbl td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
table.tbl th{background:#f0ece2;font-size:.9rem;letter-spacing:.04em}
table.tbl tr:last-child td{border-bottom:none}
.badge{display:inline-block;padding:2px 9px;border-radius:999px;font-size:.78rem;font-weight:800}
.b-bronze{background:#f0e2cf;color:var(--bronze-d)}
.b-ink{background:#e3e6ec;color:var(--ink)}

/* ---- sample doc ---- */
.doc{background:#fffdf9;border:1px solid var(--line);border-left:4px solid var(--bronze);border-radius:var(--radius);padding:20px 22px;font-size:.92rem}
.doc code,.mono{font-family:"SFMono-Regular",Consolas,"Courier New",monospace;background:#f1ece1;padding:1px 5px;border-radius:4px;font-size:.86em}
.doc table{width:100%;border-collapse:collapse;margin:10px 0;font-size:.86rem}
.doc table th,.doc table td{border:1px solid var(--line);padding:6px 8px;text-align:left}
.doc table th{background:#f3efe5}

/* ---- checklist ---- */
ul.check{list-style:none;padding:0;margin:0;display:grid;gap:10px}
ul.check li{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 14px;display:flex;gap:10px;align-items:flex-start}
ul.check li::before{content:"▢";color:var(--bronze);font-weight:900;flex:0 0 auto}
ul.tick{list-style:none;padding:0;margin:0;display:grid;gap:8px}
ul.tick li{padding-left:26px;position:relative}
ul.tick li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:900}

/* ---- callout ---- */
.note{background:#fbf6ec;border:1px solid #ead9bd;border-radius:var(--radius);padding:16px 18px;font-size:.95rem}
.note.secret{background:#f3f6f3;border-color:#cfe0d2}

/* 問い合わせフォーム埋め込み */
.form-embed iframe{width:100%;min-height:1000px;border:0;background:#fff;border-radius:var(--radius)}

/* 看板猫カレンダー */
.cat-grid{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.cat-card .ph-img{display:flex;align-items:center;justify-content:center;aspect-ratio:4/3;background:#efe9dd;color:#9a8c72;font-size:.9rem}
.cat-card .cat-meta{padding:12px 14px;display:flex;justify-content:space-between;align-items:center;gap:8px}
.cat-feature{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center}
.cat-feature .ph-img{aspect-ratio:4/3;background:#efe9dd;border:1px solid var(--line);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;color:#9a8c72}
@media(max-width:700px){.cat-grid{grid-template-columns:repeat(2,1fr)}.cat-feature{grid-template-columns:1fr}}
@media(max-width:460px){.cat-grid{grid-template-columns:1fr}}

/* ---- CTA band ---- */
.cta-band{background:var(--bronze);color:#fff;text-align:center}
.cta-band h2{color:#fff}
.cta-band .btn.dark{background:#fff;color:var(--bronze-d)}
.cta-band .btn.dark:hover{background:#f3efe6}

/* ---- footer ---- */
footer.site{background:var(--dark);color:#b8bdc8;padding:34px 0;font-size:.88rem;border-top:3px solid var(--bronze)}
footer.site a{color:#d9d3c5}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px}
.ph{color:#c98;background:#2a2230;padding:0 4px;border-radius:3px} /* placeholder marker */

/* ---- responsive ---- */
@media(max-width:820px){
  .grid.cols-3,.grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:1.85rem}
  h2{font-size:1.45rem}
}
@media(max-width:560px){
  .grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}
  .nav{justify-content:center}
  .hero h1{font-size:1.6rem}
  .section{padding:46px 0}
  /* 狭い画面では表を横スクロール（ハミ出し防止） */
  table.tbl,.doc table{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
}