/* 計算ツールLab 共通レイアウト
   Scope: prefix .tk- to avoid collision with per-page styles.
   Ships: drawer, bottom-tab, top-cats, search overlay, favorites button. */

:root{
  --tk-bg:#f7f8fb;
  --tk-surface:#fff;
  --tk-ink:#0f172a;
  --tk-muted:#5b6479;
  --tk-line:#e5e8ef;
  --tk-brand:#1d4ed8;
  --tk-radius:12px;
  --tk-bottom-h:60px;
}

/* ========== top header extension (hamburger button) ========== */
.tk-burger{
  background:none;border:0;font-size:22px;cursor:pointer;
  padding:6px 10px;color:var(--tk-ink);line-height:1;
}
.tk-burger:hover{color:var(--tk-brand)}

.tk-topcats{display:none;gap:4px;margin-left:18px}
@media(min-width:1024px){.tk-topcats{display:inline-flex}}
.tk-topcats a{
  font-size:13px;padding:6px 12px;border-radius:99px;
  color:#374151;background:#eef2ff;text-decoration:none;
}
.tk-topcats a:hover{background:var(--tk-brand);color:#fff}
.tk-topcats a.on{background:var(--tk-brand);color:#fff}

/* ========== drawer ========== */
.tk-drawer{
  position:fixed;inset:0;z-index:200;
  pointer-events:none;
  background:rgba(15,23,42,0);
  transition:background .22s ease;
}
.tk-drawer.tk-open{pointer-events:auto;background:rgba(15,23,42,.45)}
.tk-drawer-inner{
  position:absolute;left:0;top:0;bottom:0;width:88%;max-width:340px;
  background:#fff;box-shadow:4px 0 24px rgba(0,0,0,.18);
  transform:translateX(-100%);transition:transform .22s ease;
  display:flex;flex-direction:column;overflow:hidden;
}
.tk-drawer.tk-open .tk-drawer-inner{transform:translateX(0)}
.tk-drawer-head{
  padding:14px 16px;border-bottom:1px solid var(--tk-line);
  display:flex;justify-content:space-between;align-items:center;
}
.tk-drawer-head .tk-brand{font-weight:800;font-size:17px;color:var(--tk-ink);text-decoration:none}
.tk-drawer-head .tk-brand span{color:var(--tk-brand)}
.tk-drawer-close{background:none;border:0;font-size:22px;cursor:pointer;color:var(--tk-muted)}

.tk-drawer-search{
  padding:12px 14px;border-bottom:1px solid var(--tk-line);
}
.tk-drawer-search input{
  width:100%;padding:10px 14px;border:1px solid var(--tk-line);border-radius:99px;
  font-size:15px;background:#f7f8fb;
}
.tk-drawer-search input:focus{outline:2px solid var(--tk-brand);background:#fff}

.tk-drawer-body{flex:1;overflow-y:auto;padding:6px 0 20px}
.tk-drawer-body h4{
  font-size:11px;text-transform:uppercase;letter-spacing:.06em;
  color:var(--tk-muted);margin:14px 16px 6px;font-weight:700;
}
.tk-drawer-body ul{list-style:none;padding:0;margin:0}
.tk-drawer-body ul li{margin:0}
.tk-drawer-body ul li > a, .tk-drawer-body ul li > button{
  display:flex;align-items:center;gap:10px;width:100%;
  padding:10px 16px;font-size:14px;color:var(--tk-ink);
  background:none;border:0;text-decoration:none;cursor:pointer;text-align:left;
}
.tk-drawer-body ul li > a:hover, .tk-drawer-body ul li > button:hover{background:#f1f5f9;color:var(--tk-brand)}
.tk-drawer-body ul li .tk-ico{font-size:18px;width:24px;text-align:center}
.tk-drawer-body ul.tk-tools li > a{padding-left:38px;font-size:13px;color:var(--tk-muted)}
.tk-drawer-body ul.tk-tools li > a:hover{color:var(--tk-brand)}

.tk-drawer-cats > li > button .tk-arrow{margin-left:auto;font-size:12px;transition:transform .15s}
.tk-drawer-cats > li.tk-expanded > button .tk-arrow{transform:rotate(90deg)}
.tk-drawer-cats > li > ul{display:none}
.tk-drawer-cats > li.tk-expanded > ul{display:block}

.tk-fav-empty{padding:8px 16px;font-size:12px;color:var(--tk-muted);font-style:italic}

/* ========== bottom tab (mobile) ========== */
.tk-bottom{
  position:fixed;left:0;right:0;bottom:0;z-index:90;
  background:#fff;border-top:1px solid var(--tk-line);
  display:flex;height:var(--tk-bottom-h);
  box-shadow:0 -2px 12px rgba(0,0,0,.05);
}
@media(min-width:1024px){.tk-bottom{display:none}}
.tk-bottom a, .tk-bottom button{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  padding:6px 4px;font-size:10px;color:var(--tk-muted);text-decoration:none;
  background:none;border:0;cursor:pointer;line-height:1.2;
}
.tk-bottom a .tk-ico, .tk-bottom button .tk-ico{font-size:20px}
.tk-bottom a:hover, .tk-bottom button:hover{color:var(--tk-brand)}
.tk-bottom a.on{color:var(--tk-brand);font-weight:700}

/* Reserve space at body bottom on mobile so content not hidden behind tab */
@media(max-width:1023.98px){
  body{padding-bottom:var(--tk-bottom-h)}
}

/* ========== favorites star button ========== */
.tk-fav-btn{
  background:none;border:0;font-size:22px;cursor:pointer;color:#cbd5e1;line-height:1;
  padding:0 8px;
}
.tk-fav-btn.on{color:#facc15}

/* ========== search results ========== */
.tk-search-results{
  position:absolute;top:100%;left:0;right:0;background:#fff;
  border:1px solid var(--tk-line);border-top:0;border-radius:0 0 12px 12px;
  max-height:60vh;overflow-y:auto;box-shadow:0 8px 20px rgba(0,0,0,.10);z-index:60;
  display:none;
}
.tk-search-results.tk-show{display:block}
.tk-search-results a{
  display:block;padding:10px 16px;border-bottom:1px solid var(--tk-line);
  text-decoration:none;color:var(--tk-ink);font-size:14px;
}
.tk-search-results a:last-child{border-bottom:0}
.tk-search-results a:hover{background:#f1f5f9}
.tk-search-results .tk-cat{font-size:11px;color:var(--tk-muted);margin-left:6px}

/* category landing (for /money/index.html etc.) */
.tk-cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.tk-cat-card{
  background:#fff;border:1px solid var(--tk-line);border-radius:14px;padding:20px;
  text-decoration:none;color:var(--tk-ink);transition:transform .15s,border-color .15s;
}
.tk-cat-card:hover{transform:translateY(-2px);border-color:var(--tk-brand)}
.tk-cat-card .tk-ico{font-size:28px;display:block;margin-bottom:8px}
.tk-cat-card .tk-ttl{font-weight:800;color:var(--tk-brand);margin-bottom:4px;font-size:16px}
.tk-cat-card .tk-dsc{font-size:13px;color:var(--tk-muted);line-height:1.6}
.tk-cat-card.tk-soon{background:#f8fafc;border-style:dashed;color:var(--tk-muted)}
.tk-cat-card.tk-soon .tk-ttl{color:var(--tk-muted)}

/* ========== article / tool page layout ========== */
.tk-page header.site{background:#fff;border-bottom:1px solid var(--tk-line);position:sticky;top:0;z-index:50}
.tk-page header.site .wrap{max-width:1080px;margin:0 auto;padding:12px 20px;display:flex;justify-content:space-between;align-items:center}
.tk-page header.site .brand{font-weight:800;font-size:18px;color:var(--tk-ink);text-decoration:none}
.tk-page header.site .brand span{color:var(--tk-tone,var(--tk-brand))}
.tk-bread{max-width:1080px;margin:14px auto 0;padding:0 20px;font-size:13px;color:var(--tk-muted)}
.tk-bread a{color:var(--tk-muted)}
.tk-main{max-width:1080px;margin:0 auto;padding:18px 20px 80px}
.tk-article h1{font-size:28px;line-height:1.4;margin:18px 0 10px;letter-spacing:.01em}
.tk-lead{font-size:15px;background:#fff;border:1px solid var(--tk-line);border-left:4px solid var(--tk-tone,var(--tk-brand));padding:14px 18px;border-radius:8px;margin:14px 0 24px;line-height:1.8}
.tk-meta{font-size:12px;color:var(--tk-muted);margin-bottom:16px}
.tk-tag{display:inline-block;background:var(--tk-tone-bg,#eef2ff);color:var(--tk-tone-fg,#1e3a8a);font-size:12px;padding:2px 8px;border-radius:99px;margin-right:6px}
.tk-article h2{font-size:21px;margin:40px 0 12px;padding-left:12px;border-left:6px solid var(--tk-tone,var(--tk-brand));line-height:1.5}
.tk-article h3{font-size:17px;margin:28px 0 8px;color:var(--tk-tone-dark,#102a6b)}
.tk-article h4{font-size:15px;margin:18px 0 6px}
.tk-article p{margin:8px 0;line-height:1.85}
.tk-article ul,.tk-article ol{padding-left:22px;line-height:1.85}
.tk-card{background:#fff;border:1px solid var(--tk-line);border-radius:12px;padding:20px;margin:16px 0}
.tk-toc{background:#fff;border:1px solid var(--tk-line);border-radius:12px;padding:14px 20px;margin:16px 0 22px}
.tk-toc strong{font-size:13px;color:var(--tk-muted);letter-spacing:.06em}
.tk-toc ol{margin:6px 0 0;padding-left:22px;font-size:14px;columns:2}
.tk-toc a{color:#1f2937}
.tk-calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:760px){.tk-calc-grid{grid-template-columns:1fr}}
.tk-field{margin:12px 0;display:flex;flex-direction:column}
.tk-field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:#1f2937;line-height:1.4}
.tk-field .tk-hint{font-size:12px;color:var(--tk-muted);margin-top:4px;line-height:1.5}
.tk-field input[type="number"],
.tk-field input[type="text"],
.tk-field input[type="date"],
.tk-field input[type="time"],
.tk-field input[type="email"],
.tk-field input[type="tel"],
.tk-field select,
.tk-field textarea{
  width:100%;
  height:44px;
  padding:0 12px;
  font-size:16px;
  line-height:1.4;
  border:1px solid var(--tk-line);
  border-radius:8px;
  background:#fff;
  color:var(--tk-ink);
  font-family:inherit;
  font-variant-numeric:tabular-nums;
  box-sizing:border-box;
  appearance:none;
  -webkit-appearance:none;
  -moz-appearance:none;
  transition:border-color .12s, box-shadow .12s;
}
.tk-field textarea{height:auto;min-height:88px;padding:10px 12px;line-height:1.6;resize:vertical}
.tk-field select{
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%235b6479' d='M6 8L0 0h12z'/></svg>");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:36px;
  cursor:pointer;
}
.tk-field input::-webkit-outer-spin-button,
.tk-field input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.tk-field input[type="number"]{-moz-appearance:textfield}
.tk-field input:focus,
.tk-field select:focus,
.tk-field textarea:focus{
  outline:0;
  border-color:var(--tk-tone,var(--tk-brand));
  box-shadow:0 0 0 3px rgba(29,78,216,.15);
}
.tk-field input:disabled,
.tk-field select:disabled{background:#f1f5f9;color:var(--tk-muted);cursor:not-allowed}
.tk-field input[type="range"]{width:100%;height:auto;padding:0;background:transparent;border:0}
.tk-field input[type="checkbox"],
.tk-field input[type="radio"]{width:auto;height:auto;margin-right:6px;vertical-align:middle}
.tk-row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.tk-toggle{display:inline-flex;border:1px solid var(--tk-line);border-radius:8px;overflow:hidden;background:#fff;flex-wrap:wrap}
.tk-toggle button{padding:8px 14px;border:0;background:#fff;font-size:14px;cursor:pointer;color:#374151}
.tk-toggle button.on{background:var(--tk-tone,var(--tk-brand));color:#fff;font-weight:700}
.tk-result{background:linear-gradient(180deg,var(--tk-tone-dark,#0b2454),var(--tk-tone,var(--tk-brand)));color:#fff;border-radius:12px;padding:20px;position:sticky;top:70px}
.tk-result h3{color:#fff;margin:0 0 8px;font-size:14px;font-weight:700;border-left:0;padding:0}
.tk-result .tk-big{font-size:36px;font-weight:800;font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.tk-result .tk-big small{font-size:14px;font-weight:500;opacity:.85;margin-left:4px}
.tk-result .tk-rgrid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}
.tk-result .tk-rgrid div{background:rgba(255,255,255,.10);border-radius:8px;padding:10px 12px}
.tk-result .tk-rgrid .tk-lbl{font-size:11px;opacity:.75}
.tk-result .tk-rgrid .tk-val{font-size:17px;font-weight:700;font-variant-numeric:tabular-nums}
.tk-result .tk-note{font-size:11px;opacity:.78;margin-top:10px}
.tk-cmp{width:100%;border-collapse:collapse;margin:14px 0;background:#fff;font-size:14px}
.tk-cmp th,.tk-cmp td{border:1px solid var(--tk-line);padding:8px 12px;text-align:left;vertical-align:top}
.tk-cmp th{background:var(--tk-tone-bg,#eef2ff);color:var(--tk-tone-dark,#1e3a8a);font-weight:700;text-align:center}
.tk-cmp td.num{text-align:right;font-variant-numeric:tabular-nums}
.tk-formula{background:#f1f5f9;padding:12px;border-radius:6px;font-family:ui-monospace,monospace;font-size:13.5px;line-height:1.7}
.tk-case{border:1px solid var(--tk-line);background:#fff;border-radius:10px;padding:14px 18px;margin:10px 0}
.tk-case h4{margin:0 0 6px;color:var(--tk-tone-dark,#102a6b)}
.tk-case .tk-num{color:var(--tk-tone,var(--tk-brand));font-weight:800;font-size:19px;font-variant-numeric:tabular-nums}
details.tk-faq{background:#fff;border:1px solid var(--tk-line);border-radius:8px;padding:12px 16px;margin:8px 0}
details.tk-faq summary{cursor:pointer;font-weight:700;color:var(--tk-tone-dark,#102a6b);list-style:none}
details.tk-faq summary::before{content:"Q．";color:var(--tk-tone,var(--tk-brand));font-weight:800;margin-right:6px}
details.tk-faq[open] summary{margin-bottom:8px}
.tk-related{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:14px 0}
.tk-related a{display:block;background:#fff;border:1px solid var(--tk-line);border-radius:10px;padding:14px 16px;color:var(--tk-ink);transition:transform .15s,border-color .15s;text-decoration:none}
.tk-related a:hover{transform:translateY(-2px);border-color:var(--tk-tone,var(--tk-brand));text-decoration:none}
.tk-related .tk-rt{font-weight:700;color:var(--tk-tone,var(--tk-brand));margin-bottom:4px}
.tk-related .tk-rd{font-size:13px;color:var(--tk-muted)}
.tk-warn{background:#fffbeb;border:1px solid #fde68a;border-radius:8px;padding:12px 16px;font-size:14px;color:#7c5e10;margin:10px 0}
.tk-cite{font-size:13px;color:var(--tk-muted)}
.tk-cite ul{padding-left:18px}
footer.tk-footer{margin-top:48px;padding:28px 20px;background:#0b1220;color:#cbd5e1;text-align:center;font-size:13px}
footer.tk-footer a{color:#93c5fd}

/* color tones (override per page) */
.tk-tone-money  {--tk-tone:#1d4ed8;--tk-tone-dark:#0b2454;--tk-tone-bg:#eef2ff;--tk-tone-fg:#1e3a8a}
.tk-tone-health {--tk-tone:#7c3aed;--tk-tone-dark:#4c1d95;--tk-tone-bg:#ede9fe;--tk-tone-fg:#4c1d95}
.tk-tone-units  {--tk-tone:#0d9488;--tk-tone-dark:#134e4a;--tk-tone-bg:#ccfbf1;--tk-tone-fg:#134e4a}
.tk-tone-date   {--tk-tone:#db2777;--tk-tone-dark:#831843;--tk-tone-bg:#fce7f3;--tk-tone-fg:#831843}
.tk-tone-math   {--tk-tone:#4f46e5;--tk-tone-dark:#312e81;--tk-tone-bg:#e0e7ff;--tk-tone-fg:#312e81}
.tk-tone-estate {--tk-tone:#0369a1;--tk-tone-dark:#0c4a6e;--tk-tone-bg:#e0f2fe;--tk-tone-fg:#0c4a6e}
.tk-tone-car    {--tk-tone:#dc2626;--tk-tone-dark:#7f1d1d;--tk-tone-bg:#fee2e2;--tk-tone-fg:#7f1d1d}
.tk-tone-edu    {--tk-tone:#16a34a;--tk-tone-dark:#14532d;--tk-tone-bg:#dcfce7;--tk-tone-fg:#14532d}
.tk-tone-biz    {--tk-tone:#2563eb;--tk-tone-dark:#1e3a8a;--tk-tone-bg:#dbeafe;--tk-tone-fg:#1e3a8a}
.tk-tone-daily  {--tk-tone:#ea580c;--tk-tone-dark:#7c2d12;--tk-tone-bg:#ffedd5;--tk-tone-fg:#7c2d12}
.tk-tone-fun    {--tk-tone:#9333ea;--tk-tone-dark:#581c87;--tk-tone-bg:#f3e8ff;--tk-tone-fg:#581c87}
.tk-tone-beauty {--tk-tone:#e11d48;--tk-tone-dark:#881337;--tk-tone-bg:#ffe4e6;--tk-tone-fg:#881337}
.tk-tone-travel {--tk-tone:#0284c7;--tk-tone-dark:#0c4a6e;--tk-tone-bg:#e0f2fe;--tk-tone-fg:#0c4a6e}
.tk-tone-sports {--tk-tone:#65a30d;--tk-tone-dark:#3f6212;--tk-tone-bg:#ecfccb;--tk-tone-fg:#3f6212}