/* =========================================================
   Mitsuket-ai — Blog (load after style.css + pages.css)
   1. Cover art    2. Toolbar (tabs, search, chips)
   3. Cards        4. Sidebar      5. Article (prose)
   6. Article extras (TOC, share, author, prev/next)
   7. Responsive
   ========================================================= */

/* ---------- 1. Cover art (no photos needed: tone + icon per post) ---------- */
.b-cover{position:relative;overflow:hidden;isolation:isolate;display:grid;place-items:center;aspect-ratio:16 / 9;border-radius:var(--radius-sm);color:#fff;background:var(--c1,#1F5FFF)}
.b-cover::before{content:"";position:absolute;inset:0;z-index:-1;background-image:linear-gradient(to right,rgba(255,255,255,.10) 1px,transparent 1px),linear-gradient(to bottom,rgba(255,255,255,.10) 1px,transparent 1px);background-size:26px 26px;-webkit-mask-image:radial-gradient(ellipse 80% 90% at 30% 30%,#000,transparent 80%);mask-image:radial-gradient(ellipse 80% 90% at 30% 30%,#000,transparent 80%)}
.b-cover::after{content:"";position:absolute;z-index:-1;width:70%;aspect-ratio:1;right:-22%;bottom:-48%;border-radius:50%;background:var(--c2,#14D3A9);filter:blur(36px);opacity:.75}
.b-cover-ico{width:30%;max-width:84px;aspect-ratio:1;border-radius:24%;display:grid;place-items:center;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);box-shadow:0 18px 30px -14px rgba(0,0,0,.45);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);transition:transform .5s var(--ease)}
.b-cover-ico svg.lucide{width:46%;height:46%}
.b-cover-cat{position:absolute;left:14px;bottom:12px;font-family:var(--mono);font-size:var(--fs-xs);font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.78)}
.b-cover.sm{width:72px;flex-shrink:0;aspect-ratio:1;border-radius:12px}
.b-cover.sm .b-cover-ico{width:58%;max-width:none;border-radius:10px}
.b-cover.sm .b-cover-cat,.b-cover.sm::before{display:none}
.b-cover.lg{aspect-ratio:auto;min-height:100%;border-radius:var(--radius)}
.b-cover.xl{aspect-ratio:3 / 1;border-radius:var(--radius)}
.b-cover.xl .b-cover-ico{max-width:110px}
.tone-brand{--c1:#1F5FFF;--c2:#14D3A9;background:linear-gradient(135deg,#1238C4,#1F5FFF 55%,#3D8BFF)}
.tone-mint{--c2:#7FF0D6;background:linear-gradient(135deg,#0B7F68,#0E9F7F 50%,#14D3A9)}
.tone-ink{--c2:#1F5FFF;background:linear-gradient(135deg,#0A1228,#13203F 50%,#223259)}
.tone-cyan{--c2:#1F5FFF;background:linear-gradient(135deg,#0A7AA0,#22C3EE 70%,#5CD8F5)}
.tone-sky{--c2:#14D3A9;background:linear-gradient(135deg,#1748D8,#3D8BFF 55%,#22C3EE)}

/* ---------- 2. Toolbar ---------- */
.blog-search{position:relative;max-width:520px;margin-top:26px}
.blog-search .field input{height:54px;padding-right:110px;border-radius:999px;box-shadow:var(--shadow-sm)}
.blog-search .field>svg.lucide:first-child{left:18px}
.blog-search .field input{padding-left:46px}
.blog-search .btn{position:absolute;right:6px;top:50%;transform:translateY(-50%);height:42px}
.blog-search .btn:hover{transform:translateY(calc(-50% - 1px))}
.cat-tabs{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;padding:4px 2px 6px;margin:-4px -2px 0}
.cat-tabs::-webkit-scrollbar{display:none}
.cat-tab{display:inline-flex;align-items:center;gap:7px;flex-shrink:0;height:42px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:var(--fs-sm);font-weight:700;color:var(--ink-2);white-space:nowrap;transition:border-color .2s,background .2s,color .2s,box-shadow .2s}
.cat-tab svg.lucide{width:16px;height:16px;color:var(--brand)}
.cat-tab small{min-width:22px;padding:0 6px;border-radius:999px;background:var(--paper);font-size:var(--fs-xs);font-weight:700;line-height:20px;text-align:center;color:var(--muted)}
.cat-tab:hover{border-color:var(--brand-100);color:var(--brand)}
.cat-tab[aria-pressed="true"],.cat-tab[aria-current]{background:var(--ink);border-color:var(--ink);color:#fff;box-shadow:0 10px 20px -10px rgba(10,18,40,.55)}
.cat-tab[aria-pressed="true"] svg.lucide,.cat-tab[aria-current] svg.lucide{color:#8DB8FF}
.cat-tab[aria-pressed="true"] small,.cat-tab[aria-current] small{background:rgba(255,255,255,.14);color:#fff}
.active-filters{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:14px}
.active-filters[hidden]{display:none}
.filter-chip{display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 10px 0 14px;border-radius:999px;border:1px solid var(--brand-100);background:var(--brand-50);font-size:var(--fs-sm);font-weight:700;color:var(--brand);transition:background .2s}
.filter-chip span{font-size:var(--fs-xs);font-weight:500;color:var(--muted)}
.filter-chip svg.lucide{width:15px;height:15px;padding:2px;border-radius:50%;background:#fff}
.filter-chip:hover{background:#fff}
.filter-reset{border:0;background:none;padding:6px 8px;font-size:var(--fs-sm);font-weight:700;color:var(--muted);text-decoration:underline;text-underline-offset:3px}
.filter-reset:hover{color:var(--ink)}
.list-meta{margin-top:28px}

/* ---------- 3. Cards ---------- */
.b-meta{display:flex;flex-wrap:wrap;align-items:center;gap:6px 14px;font-size:var(--fs-xs);color:var(--muted-2)}
.b-meta time{font-family:var(--mono);font-weight:500;letter-spacing:.04em}
.b-cat{position:relative;z-index:2;display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;background:var(--brand-50);font-weight:700;color:var(--brand);transition:background .2s,color .2s}
.b-cat svg.lucide{width:13px;height:13px}
.b-cat:hover{background:var(--brand);color:#fff}
.b-read{display:inline-flex;align-items:center;gap:4px}
.b-read svg.lucide{width:13px;height:13px}
.b-tags{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px}
.b-tag{position:relative;z-index:2;display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:var(--fs-xs);font-weight:700;color:var(--muted);transition:border-color .2s,color .2s,background .2s}
.b-tag small{font-family:var(--mono);font-size:.6875rem;font-weight:500;color:var(--muted-2)}
.b-tag:hover{border-color:var(--brand);color:var(--brand)}
.b-tag.is-active{background:var(--brand);border-color:var(--brand);color:#fff}
.b-tag.is-active small{color:rgba(255,255,255,.8)}

.post-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.post-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.post-card{position:relative;display:flex;flex-direction:column;gap:16px;padding:12px 12px 22px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);transition:transform .4s var(--ease),box-shadow .4s,border-color .4s}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--brand-100)}
.post-card:hover .b-cover-ico,.post-featured:hover .b-cover-ico{transform:scale(1.08) rotate(-4deg)}
.post-card .post-body{display:flex;flex-direction:column;gap:10px;flex:1;padding:0 10px}
.post-card h3{margin:0;font-family:var(--jp);font-size:var(--fs-md);font-weight:700;line-height:1.6;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
.post-card p{margin:0;font-size:var(--fs-sm);line-height:1.8;color:var(--muted);display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
.post-card .b-tags{margin-top:auto;padding-top:4px}
.post-link{transition:color .25s}
.post-link::after{content:"";position:absolute;inset:0;z-index:1;border-radius:inherit}   /* whole card is the click target */
.post-card:hover .post-link,.post-featured:hover .post-link{color:var(--brand)}

.post-featured{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:28px;margin-bottom:8px;padding:12px;border-radius:var(--radius-lg);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);transition:box-shadow .4s,border-color .4s}
.post-featured[hidden]{display:none}
.post-featured:hover{box-shadow:var(--shadow);border-color:var(--brand-100)}
.post-featured .b-cover{min-height:280px}
.post-featured .post-body{display:flex;flex-direction:column;gap:12px;padding:20px 20px 20px 0}
.post-featured h2{margin:0;font-family:var(--jp);font-size:var(--fs-xl);font-weight:900;line-height:1.55}
.post-featured p{margin:0;font-size:var(--fs-base);line-height:1.85;color:var(--muted)}
.featured-label{display:inline-flex;align-items:center;gap:6px;width:fit-content;font-family:var(--mono);font-size:var(--fs-xs);font-weight:700;letter-spacing:.1em;color:var(--mint-600)}
.featured-label svg.lucide{width:14px;height:14px}
.read-more{display:inline-flex;align-items:center;gap:6px;margin-top:auto;font-size:var(--fs-sm);font-weight:700;color:var(--brand)}
.read-more svg.lucide{transition:transform .3s var(--ease)}
.post-featured:hover .read-more svg.lucide{transform:translateX(4px)}
#postGrid.in>.post-card{animation:cardIn .6s var(--ease) backwards;animation-delay:calc(var(--i,0) * 60ms)}

/* ---------- 4. Sidebar ---------- */
.side-cats{display:flex;flex-direction:column;gap:4px}
.side-cats a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 12px;margin:0 -12px;border-radius:12px;font-size:var(--fs-sm);font-weight:700;color:var(--ink-2);transition:background .2s,color .2s}
.side-cats a span{display:inline-flex;align-items:center;gap:10px}
.side-cats a svg.lucide{width:17px;height:17px;color:var(--brand)}
.side-cats a small{font-family:var(--mono);font-size:var(--fs-xs);color:var(--muted-2)}
.side-cats a:hover{background:var(--paper);color:var(--brand)}
.side-cats a[aria-current]{background:var(--brand-50);color:var(--brand)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud .b-tag{padding:5px 12px;font-size:var(--fs-sm)}
.post-minis{display:flex;flex-direction:column;gap:14px}
.post-mini{display:flex;align-items:center;gap:14px}
.post-mini b{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;font-size:var(--fs-sm);line-height:1.6;transition:color .2s}
.post-mini small{display:block;margin-top:2px;font-size:var(--fs-xs);color:var(--muted-2)}
.post-mini:hover b{color:var(--brand)}
.card.side{padding:24px}
.card.side .card-title{font-size:var(--fs-md);margin-bottom:14px}

/* ---------- 5. Article ---------- */
.post-head .chip-list{margin-bottom:4px}
.post-head .page-title{max-width:900px;font-size:clamp(1.625rem,1.1rem + 2vw,2.5rem)}
.post-head .lead{max-width:760px}
.post-info{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:22px;font-size:var(--fs-sm);color:var(--muted)}
.post-info>span,.post-info>time{display:inline-flex;align-items:center;gap:6px}
.post-info svg.lucide{width:16px;height:16px;color:var(--muted-2)}
.post-info .author{gap:10px;color:var(--ink-2);font-weight:700}
.post-info .author .v-ava{width:32px;height:32px;border-radius:10px;font-size:var(--fs-xs)}
.post-head .b-tags{margin-top:18px}
.post-head .b-tag{font-size:var(--fs-sm);padding:4px 12px}
.post-cover{margin-top:-28px;position:relative;z-index:1}
.post-cover .b-cover{box-shadow:var(--shadow-lg)}

.article-card{padding:44px 52px}
.prose{font-size:1.0625rem;line-height:2;color:var(--ink-2)}
.prose>*:first-child{margin-top:0}
.prose p{margin:0 0 1.3em}
.prose h2{position:relative;margin:2.4em 0 .9em;padding-left:18px;font-family:var(--jp);font-size:var(--fs-xl);font-weight:900;line-height:1.5;color:var(--ink);scroll-margin-top:calc(var(--header-h-sm) + 20px)}
.prose h2::before{content:"";position:absolute;left:0;top:.25em;bottom:.25em;width:5px;border-radius:4px;background:var(--grad)}
.prose h3{margin:1.9em 0 .6em;font-family:var(--jp);font-size:var(--fs-lg);font-weight:700;line-height:1.55;color:var(--ink)}
.prose a{font-weight:700;color:var(--brand);text-decoration:underline;text-decoration-color:var(--brand-100);text-underline-offset:4px;transition:text-decoration-color .2s}
.prose a:hover{text-decoration-color:var(--brand)}
.prose strong{font-weight:700;color:var(--ink);background:linear-gradient(transparent 62%,rgba(20,211,169,.28) 62%)}
.prose ul,.prose ol{margin:0 0 1.4em;padding-left:1.4em}
.prose li{margin:.35em 0}
.prose li::marker{color:var(--brand);font-weight:700}
.prose blockquote{margin:1.8em 0;padding:20px 24px;border-radius:var(--radius-sm);background:var(--paper);border-left:4px solid var(--brand);font-size:var(--fs-md);color:var(--ink)}
.prose blockquote p:last-child{margin-bottom:0}
.prose table{width:100%;margin:1.6em 0;border-collapse:collapse;font-size:var(--fs-sm);line-height:1.75}
.prose .table-scroll{overflow-x:auto;margin:1.6em 0;border:1px solid var(--line);border-radius:var(--radius-sm)}
.prose .table-scroll table{margin:0}
.prose th,.prose td{padding:12px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.prose th{background:var(--paper);font-size:var(--fs-xs);font-weight:700;letter-spacing:.04em;color:var(--muted);white-space:nowrap}
.prose tr:last-child td{border-bottom:0}
.prose td:first-child{font-weight:700;color:var(--ink);white-space:nowrap}
/* key points box at the top of the article */
.takeaways{margin:0 0 2.2em;padding:24px 26px;border-radius:var(--radius);background:var(--grad-soft);border:1px solid var(--brand-100)}
.takeaways p.t{display:flex;align-items:center;gap:8px;margin:0 0 10px;font-size:var(--fs-sm);font-weight:700;letter-spacing:.06em;color:var(--brand)}
.takeaways p.t svg.lucide{width:17px;height:17px}
.takeaways ul{list-style:none;margin:0;padding:0}
.takeaways li,.prose .is-style-takeaways li{position:relative;margin:.45em 0;padding-left:28px;font-size:var(--fs-base);line-height:1.8;font-weight:500;color:var(--ink)}
.takeaways li::before,.prose .is-style-takeaways li::before{content:"";position:absolute;left:0;top:.42em;width:18px;height:18px;border-radius:50%;background:var(--mint) center/11px no-repeat url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E")}
/* callouts */
.callout{display:flex;gap:14px;margin:1.8em 0;padding:18px 20px;border-radius:var(--radius-sm);background:var(--brand-50);border:1px solid var(--brand-100);font-size:var(--fs-base);line-height:1.85}
.callout>svg.lucide{width:22px;height:22px;margin-top:3px;color:var(--brand)}
.callout b{display:block;margin-bottom:2px;color:var(--ink)}
.callout p{margin:0}
.callout.warn{background:#FFF6E5;border-color:#F5D9A8}
.callout.warn>svg.lucide{color:#B26A00}
/* numbered step list */
.prose ol.steps-list,.prose ol.is-style-steps{list-style:none;padding:0;counter-reset:s}
.prose ol.steps-list>li,.prose ol.is-style-steps>li{position:relative;counter-increment:s;margin:0;padding:0 0 18px 52px}
.prose ol.steps-list>li::before,.prose ol.is-style-steps>li::before{content:counter(s,decimal-leading-zero);position:absolute;left:0;top:2px;width:36px;height:36px;border-radius:11px;display:grid;place-items:center;background:var(--ink);color:#fff;font-family:var(--mono);font-size:var(--fs-sm);font-weight:700}
.prose ol.steps-list>li:not(:last-child)::after,.prose ol.is-style-steps>li:not(:last-child)::after{content:"";position:absolute;left:17px;top:44px;bottom:6px;width:2px;background:var(--line)}
.prose ol.steps-list b,.prose ol.is-style-steps b{display:block;color:var(--ink)}

/* ---------- 6. Article extras ---------- */
.article-foot{margin-top:40px;padding-top:28px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px}
.article-foot .lbl-s{display:block;margin-bottom:10px;font-size:var(--fs-xs);font-weight:700;letter-spacing:.08em;color:var(--muted-2)}
.share{display:flex;gap:8px}
.share a{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:#fff;font-size:var(--fs-sm);font-weight:700;color:var(--ink-2);transition:all .25s}
.share a svg{width:16px;height:16px}
.share a:hover{background:var(--ink);border-color:var(--ink);color:#fff}
.share a.is-done{background:var(--mint-50);border-color:#A8EED9;color:var(--mint-600)}
.share a[data-share="x"],.share a[data-share="linkedin"]{width:40px;padding:0;justify-content:center}
.author-box{display:flex;gap:18px;margin-top:28px;padding:24px;border-radius:var(--radius);background:var(--paper);border:1px solid var(--line)}
.author-box .v-ava{width:56px;height:56px;border-radius:16px;font-size:var(--fs-md)}
.author-box small{font-size:var(--fs-xs);font-weight:700;letter-spacing:.08em;color:var(--muted-2)}
.author-box b{display:block;font-size:var(--fs-md)}
.author-box p{margin:6px 0 0;font-size:var(--fs-sm);line-height:1.8;color:var(--muted)}
.post-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:20px}
.pn{display:flex;flex-direction:column;gap:6px;padding:20px 22px;border-radius:var(--radius);background:#fff;border:1px solid var(--line);transition:border-color .25s,box-shadow .25s,transform .3s var(--ease)}
.pn:hover{border-color:var(--brand-100);box-shadow:var(--shadow);transform:translateY(-2px)}
.pn small{display:inline-flex;align-items:center;gap:6px;font-size:var(--fs-xs);font-weight:700;letter-spacing:.06em;color:var(--brand)}
.pn small svg.lucide{width:14px;height:14px}
.pn b{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;font-size:var(--fs-sm);line-height:1.65}
.pn.next{text-align:right;align-items:flex-end}
/* TOC */
.toc{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc a{display:flex;gap:10px;padding:8px 10px;margin:0 -10px;border-radius:10px;font-size:var(--fs-sm);line-height:1.6;color:var(--muted);transition:background .2s,color .2s}
.toc a .n{flex-shrink:0;font-family:var(--mono);font-size:var(--fs-xs);font-weight:700;line-height:1.95;color:var(--muted-2)}
.toc a:hover{color:var(--ink)}
.toc a.is-active{background:var(--brand-50);color:var(--brand);font-weight:700}
.toc a.is-active .n{color:var(--brand)}

/* ---------- 7. Responsive ---------- */
@media (max-width:1100px){
  .post-grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1024px){
  .with-aside.blog-layout>aside{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .with-aside.blog-layout>aside .card+.card{margin-top:0}
  .with-aside.post-layout>aside .toc-card{display:none}   /* TOC only useful when sticky */
  .article-card{padding:36px 36px}
}
@media (max-width:860px){
  .post-featured{grid-template-columns:1fr;gap:4px}
  .post-featured .b-cover{min-height:0;aspect-ratio:16 / 9}
  .post-featured .post-body{padding:16px 10px 10px}
}
@media (max-width:720px){
  .blog-search .field input{height:50px}
  .post-grid,.post-grid.three{grid-template-columns:1fr}
  .with-aside.blog-layout>aside{grid-template-columns:1fr}
  .article-card{padding:26px 20px}
  .prose{font-size:var(--fs-md);line-height:1.95}
  .prose h2{font-size:var(--fs-lg)}
  .b-cover.xl{aspect-ratio:16 / 9}
  .post-cover{margin-top:-20px}
  .post-nav{grid-template-columns:1fr}
  .pn.next{text-align:left;align-items:flex-start}
  .author-box{flex-direction:column;gap:12px}
  .article-foot{flex-direction:column;align-items:flex-start}
}

/* =========================================================
   WordPress additions (not in the static design)
   ========================================================= */
/* the featured image as the cover */
.b-cover.has-img img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.b-cover.has-img::before,.b-cover.has-img::after{display:none}
/* block styles (inc/blog.php) */
.prose ul.is-style-takeaways{list-style:none;margin:0 0 2.2em;padding:24px 26px;border-radius:var(--radius);background:var(--grad-soft);border:1px solid var(--brand-100)}
.prose ul.is-style-takeaways::before{content:"この記事のポイント";display:block;margin:0 0 10px;font-size:var(--fs-sm);font-weight:700;letter-spacing:.06em;color:var(--brand)}
.prose .is-style-callout,.prose .is-style-callout-warn{margin:1.8em 0;padding:18px 20px;border-radius:var(--radius-sm);background:var(--brand-50);border:1px solid var(--brand-100);border-left-width:4px;font-size:var(--fs-base);line-height:1.85}
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