/* =========================================================
   研究室図鑑 — 共通スタイル（全ページ共有）
   ========================================================= */
:root{
  --blue:#2f6bff; --blue-2:#4f8bff; --blue-deep:#1e40af;
  --purple:#8b5cf6; --purple-2:#a78bfa;
  --ink:#1e293b; --ink-2:#475569; --muted:#64748b; --faint:#94a3b8;
  --line:#e8edf5; --card:#ffffff; --page:#ffffff;
  --shadow:0 10px 30px -12px rgba(47,107,255,.18);
  --shadow-sm:0 4px 14px -6px rgba(30,41,59,.12);
  --radius:20px;
  --grad-hero:linear-gradient(135deg,#e9f0ff 0%,#eef0ff 40%,#f3ecff 100%);
  --grad-blue:linear-gradient(135deg,#3b7bff,#6a8dff);
  --grad-brand:linear-gradient(135deg,#2f6bff,#7c5cff);
  --gold:#f5b301; --silver:#9aa7bd; --bronze:#cd7f4b;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:"Segoe UI","Yu Gothic",YuGothic,"Hiragino Kaku Gothic ProN","Hiragino Sans","Meiryo",sans-serif;
  background:var(--page); color:var(--ink); line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
header{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb,var(--card) 82%,transparent);
  backdrop-filter:blur(14px); border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:11px}
.logo{width:40px;height:40px;border-radius:11px;background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;box-shadow:var(--shadow-sm)}
.logo svg{width:30px;height:30px;display:block}
.brand b{font-size:19px;font-weight:800;letter-spacing:.5px;display:block;line-height:1.15}
.brand small{font-size:10.5px;color:var(--muted);font-weight:600}
.brand>div:last-child{position:relative;top:6px}
nav.links{display:flex;gap:22px;margin-left:8px}
nav.links a{font-size:14px;font-weight:600;color:var(--ink-2);white-space:nowrap;transition:.2s}
nav.links a:hover{color:var(--blue)}
nav.links a.active{color:var(--blue);font-weight:800}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.btn{border:none;cursor:pointer;font-weight:700;font-size:14px;border-radius:11px;padding:9px 22px;font-family:inherit;transition:.2s;white-space:nowrap;display:inline-flex;align-items:center;gap:8px;justify-content:center}
.btn-ghost{background:var(--card);border:1px solid var(--line);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn-danger{background:#fff;border:1px solid #f3c2cf;color:#e11d48}
.btn-danger:hover{background:#fff5f7}
.btn:disabled{opacity:.5;cursor:not-allowed}
.hamburger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:11px;
  background:var(--card);cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;margin-left:auto}
.hamburger span{display:block;width:21px;height:2.5px;background:var(--ink-2);border-radius:2px;transition:.25s}
header.menu-open .hamburger span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
header.menu-open .hamburger span:nth-child(2){opacity:0}
header.menu-open .hamburger span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ---------- Page hero ---------- */
.page-hero{background:var(--grad-hero);padding:46px 0 40px}
.page-hero h1{font-size:38px;font-weight:900;letter-spacing:1px}
.page-hero h1 .accent{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero .lead{font-size:15px;color:var(--muted);margin-top:10px;font-weight:600;max-width:640px}

/* ---------- Section ---------- */
section.block{padding:34px 0 56px}
.sec-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.sec-head h2{font-size:24px;font-weight:900;letter-spacing:.5px}
.count-line{font-size:13px;color:var(--muted);font-weight:700;margin-bottom:18px}

/* ---------- Toolbar ---------- */
.toolbar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:26px 0 6px}
.search-input{flex:1;min-width:220px;display:flex;align-items:center;gap:10px;background:var(--card);
  border:1px solid var(--line);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-sm)}
.search-input input{border:none;background:none;outline:none;flex:1;font-size:15px;color:var(--ink);font-family:inherit}
.search-input input::placeholder{color:var(--faint)}
select.field-sel{border:1px solid var(--line);background:var(--card);border-radius:14px;padding:12px 16px;
  font-size:14px;font-weight:700;color:var(--ink-2);font-family:inherit;cursor:pointer;box-shadow:var(--shadow-sm)}

/* ---------- Tags ---------- */
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:12px}
.tag{font-size:11px;font-weight:700;color:#111;background:#fafbfd;border:1px solid #eef1f6;padding:4px 10px;border-radius:8px}
.tag-blue{background:#eef4ff;border-color:#dbe6ff;color:#2f6bff}

/* empty */
.empty{text-align:center;padding:70px 20px;color:var(--muted)}
.empty .em{font-size:52px;margin-bottom:14px}
.empty h3{font-size:19px;color:var(--ink);font-weight:800;margin-bottom:8px}

/* ---------- Footer ---------- */
footer{background:#0e1730;color:#c3ccdf;margin-top:40px;padding:56px 0 26px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr;gap:30px}
.foot-brand b{color:#fff;font-size:19px;font-weight:800}
.foot-brand .fb-logo{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.foot-brand small{font-size:11px;color:#8b98b5;font-weight:600}
.foot-brand p{font-size:12.5px;color:#8b98b5;margin:16px 0;max-width:280px;line-height:1.8}
.fcol h4{color:#fff;font-size:13px;font-weight:800;margin-bottom:16px}
.fcol a{display:block;font-size:12.5px;color:#8b98b5;margin-bottom:11px;transition:.2s}
.fcol a:hover{color:#fff}
.foot-btm{border-top:1px solid #1b2748;margin-top:40px;padding-top:22px;text-align:center;font-size:12px;color:#6b7897}

.totop{position:fixed;right:26px;bottom:26px;width:44px;height:44px;border-radius:50%;
  background:var(--grad-brand);color:#fff;border:none;cursor:pointer;font-size:18px;box-shadow:var(--shadow);z-index:40}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:30px;transform:translateX(-50%) translateY(20px);
  background:#0e1730;color:#fff;font-size:13.5px;font-weight:700;padding:13px 22px;border-radius:12px;
  box-shadow:0 16px 40px -12px rgba(15,23,42,.5);opacity:0;pointer-events:none;transition:.3s;z-index:200}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- Responsive nav ---------- */
@media(max-width:1080px){nav.links{gap:14px}nav.links a{font-size:13px}}
@media(max-width:900px){
  .nav{flex-wrap:wrap;height:auto;padding:12px 0}
  .hamburger{display:flex}
  nav.links{display:none;flex-direction:column;width:100%;gap:0;order:5;margin-top:10px;border-top:1px solid var(--line)}
  .nav-right{display:none;flex-direction:column;width:100%;order:6;margin-left:0;margin-top:10px}
  header.menu-open nav.links{display:flex}
  header.menu-open .nav-right{display:flex}
  nav.links a{font-size:15px;padding:13px 4px;border-bottom:1px solid var(--line)}
  .nav-right .btn{width:100%}
  .page-hero h1{font-size:30px}
  .foot-grid{grid-template-columns:1fr 1fr}
}