/*
Theme Name: Robotics Trend News
Theme URI: https://roboticstrend.net/
Description: AIロボットニュース自動生成テーマ
Version: 3.0.0
Author: Eatransform
Text Domain: roboticstrend
*/

/* ===== VARIABLES ===== */
:root {
    --blue:      #0055cc;
    --blue-mid:  #0044aa;
    --blue-light:#e8f0ff;
    --blue-dim:  rgba(0,85,204,.06);
    --dark:      #0a0f1e;
    --text:      #111827;
    --sub:       #6b7280;
    --muted:     #9ca3af;
    --line:      #e5e7eb;
    --line-dark: #d1d5db;
    --bg:        #f8f9fb;
    --card:      #ffffff;
    --max:       1160px;
    --r:         4px;
    --font:      'Noto Sans JP','Hiragino Sans','Yu Gothic UI',sans-serif;
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0 }
html { font-size:15px; -webkit-text-size-adjust:100% }
body { font-family:var(--font); background:var(--bg); color:var(--text); line-height:1.75; overflow-x:hidden }
a { color:inherit; text-decoration:none }
img { max-width:100%; height:auto; display:block }

/* ===== TOP BAR ===== */
.top-bar { background:var(--dark); padding:6px 0; font-size:.68rem; color:rgba(255,255,255,.45); }
.top-bar-inner { max-width:var(--max); margin:0 auto; padding:0 24px; display:flex; align-items:center; justify-content:space-between; gap:8px; flex-wrap:nowrap; overflow:hidden; }
.top-bar-left { display:flex; align-items:center; gap:12px; min-width:0; overflow:hidden; }
.top-bar-date { color:rgba(255,255,255,.35); white-space:nowrap; flex-shrink:0; }
.top-bar-tag { color:rgba(255,255,255,.6); font-weight:600; letter-spacing:.05em; font-size:.65rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.top-bar-badge { background:var(--blue); color:#fff; font-size:.6rem; font-weight:700; padding:2px 8px; border-radius:2px; letter-spacing:.04em; white-space:nowrap; flex-shrink:0; }

/* ===== HEADER ===== */
.site-header { background:#fff; border-bottom:1px solid var(--line); position:sticky; top:0; z-index:100; box-shadow:0 1px 6px rgba(0,0,0,.06); }
.header-main { max-width:var(--max); margin:0 auto; padding:14px 24px; display:flex; align-items:center; justify-content:space-between; gap:24px; }
.logo { display:flex; align-items:center; gap:12px; flex-shrink:0; min-width:0; }
.logo-mark { display:flex; align-items:center; justify-content:center; width:46px; height:46px; background:var(--blue); border-radius:3px; flex-shrink:0; }
.logo-mark svg { width:26px; height:26px; }
.logo-text { min-width:0; }
.logo-name { font-size:1.2rem; font-weight:900; color:var(--dark); letter-spacing:-.02em; line-height:1.15; display:block; white-space:nowrap; }
.logo-tagline { font-size:.58rem; color:var(--sub); letter-spacing:.07em; display:block; margin-top:2px; text-transform:uppercase; white-space:nowrap; }
.site-nav { display:flex; align-items:center; gap:1px; flex:1; justify-content:center; }
.site-nav a { color:var(--text); font-size:.8rem; font-weight:600; padding:8px 12px; border-radius:3px; transition:all .15s; white-space:nowrap; }
.site-nav a:hover { color:var(--blue); background:var(--blue-dim); }
.header-actions { display:flex; align-items:center; gap:8px; }
.search-btn { background:none; border:1.5px solid var(--line); border-radius:3px; cursor:pointer; color:var(--sub); padding:7px 10px; display:flex; align-items:center; transition:all .15s; }
.search-btn:hover { border-color:var(--blue); color:var(--blue); }

/* ===== NAV STRIP ===== */
.nav-strip { border-top:3px solid var(--blue); border-bottom:1px solid var(--line); background:#fff; }
.nav-strip-inner { max-width:var(--max); margin:0 auto; padding:0 24px; display:flex; align-items:center; overflow-x:auto; }
.nav-strip-inner a { font-size:.76rem; font-weight:700; color:var(--sub); padding:10px 14px; border-bottom:3px solid transparent; margin-bottom:-1px; transition:all .15s; white-space:nowrap; letter-spacing:.02em; }
.nav-strip-inner a:hover { color:var(--blue); border-bottom-color:var(--blue); }

/* ===== HAMBURGER ===== */
.hamburger { display:none; background:none; border:none; cursor:pointer; flex-direction:column; gap:5px; padding:6px; }
.hamburger span { display:block; width:22px; height:2px; background:var(--dark); border-radius:2px; }
.mobile-nav { display:none; background:#fff; border-top:1px solid var(--line); }
.mobile-nav.open { display:block; }
.mobile-nav a { display:flex; align-items:center; gap:10px; padding:13px 24px; font-size:.88rem; font-weight:600; color:var(--text); border-bottom:1px solid var(--line); text-decoration:none; }
.mobile-nav a:hover { background:var(--blue-dim); color:var(--blue); }
.mobile-nav a svg { opacity:.5; flex-shrink:0; }

/* ===== SEARCH OVERLAY ===== */
.search-overlay { position:fixed; inset:0; background:rgba(0,0,0,.65); z-index:200; display:flex; align-items:flex-start; justify-content:center; padding-top:80px; }
.search-overlay-inner { background:#fff; border-radius:6px; padding:24px; width:min(600px,90vw); display:flex; gap:10px; position:relative; }
.search-overlay-inner input { flex:1; border:1.5px solid var(--line); border-radius:4px; padding:12px 14px; font-size:.95rem; font-family:var(--font); outline:none; }
.search-overlay-inner input:focus { border-color:var(--blue); }
.search-overlay-inner button[type=submit] { background:var(--blue); color:#fff; border:none; border-radius:4px; padding:12px 20px; font-size:.88rem; font-weight:700; cursor:pointer; font-family:var(--font); }
.search-overlay-close { position:absolute; top:-14px; right:-14px; background:var(--dark); color:#fff; border:none; border-radius:50%; width:30px; height:30px; cursor:pointer; font-size:.8rem; display:flex; align-items:center; justify-content:center; }

/* ===== LAYOUT ===== */
.wrap { max-width:var(--max); margin:0 auto; padding:32px 24px; }
.grid { display:grid; grid-template-columns:1fr 300px; gap:36px; }

/* ===== SECTION HEADER ===== */
.sec { display:flex; align-items:center; gap:12px; margin:32px 0 18px; padding-bottom:10px; border-bottom:2px solid var(--dark); }
.sec h2 { font-size:.72rem; font-weight:900; letter-spacing:.14em; color:var(--dark); text-transform:uppercase; display:flex; align-items:center; gap:8px; }
.sec h2::before { content:''; display:block; width:4px; height:16px; background:var(--blue); border-radius:2px; }
.sec-more { margin-left:auto; font-size:.72rem; color:var(--blue); font-weight:600; }
.sec-more:hover { text-decoration:underline; }

/* ===== FEATURED ===== */
.featured { display:block; background:var(--card); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; margin-bottom:4px; transition:box-shadow .2s; }
.featured:hover { box-shadow:0 6px 24px rgba(0,85,204,.1); }
.feat-img { width:100%; aspect-ratio:21/9; overflow:hidden; position:relative; }
.feat-img img { width:100%; height:100%; object-fit:cover; transition:transform .4s; }
.featured:hover .feat-img img { transform:scale(1.015); }
.feat-overlay { position:absolute; bottom:0; left:0; right:0; background:linear-gradient(to top,rgba(10,15,30,.88) 0%,rgba(10,15,30,.3) 60%,transparent 100%); padding:48px 28px 24px; }
.feat-cat-overlay { display:inline-block; background:var(--blue); color:#fff; font-size:.62rem; font-weight:800; padding:3px 10px; border-radius:2px; letter-spacing:.05em; margin-bottom:10px; }
.feat-title-overlay { font-size:1.6rem; font-weight:900; color:#fff; line-height:1.4; text-shadow:0 1px 4px rgba(0,0,0,.4); letter-spacing:-.01em; }
.feat-body { padding:16px 24px 20px; border-top:1px solid var(--line); display:flex; align-items:flex-start; justify-content:space-between; gap:20px; }
.feat-excerpt { font-size:.88rem; color:var(--sub); line-height:1.8; flex:1; }
.feat-meta { font-size:.72rem; color:var(--muted); white-space:nowrap; padding-top:3px; }

/* ===== SKEW DIVIDER ===== */
.skew-divider { height:3px; background:linear-gradient(90deg,var(--blue) 0%,#66aaff 60%,transparent 100%); margin:24px 0; clip-path:polygon(0 0,100% 0,97% 100%,0 100%); }

/* ===== CARD GRID ===== */
.card-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-bottom:4px; }
.card { background:var(--card); border-radius:var(--r); overflow:hidden; border:1px solid var(--line); transition:box-shadow .2s,transform .2s; display:flex; flex-direction:column; }
.card:hover { box-shadow:0 4px 20px rgba(0,85,204,.1); transform:translateY(-2px); }
.card-img { aspect-ratio:16/9; overflow:hidden; flex-shrink:0; }
.card-img img { width:100%; height:100%; object-fit:cover; transition:transform .3s; }
.card:hover .card-img img { transform:scale(1.04); }
.card-body { padding:14px 16px 16px; display:flex; flex-direction:column; flex:1; }
.cat-tag { display:inline-block; background:var(--blue-light); color:var(--blue); font-size:.6rem; font-weight:700; padding:2px 8px; border-radius:2px; margin-bottom:8px; border-left:2px solid var(--blue); }
.card-ttl { font-size:.88rem; font-weight:700; line-height:1.5; margin-bottom:8px; flex:1; }
.card-ttl a:hover { color:var(--blue); }
.card-excerpt { font-size:.75rem; color:var(--sub); line-height:1.7; margin-bottom:10px; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.card-footer { display:flex; align-items:center; justify-content:space-between; margin-top:auto; padding-top:8px; border-top:1px solid var(--line); }
.card-date { font-size:.68rem; color:var(--muted); }
.card-read { font-size:.68rem; color:var(--blue); font-weight:600; }

/* ===== NEWS LIST ===== */
.news-list { display:flex; flex-direction:column; }
.ni { display:flex; gap:16px; padding:16px 0; border-bottom:1px solid var(--line); align-items:flex-start; }
.ni:first-child { border-top:1px solid var(--line); }
.ni-img { flex-shrink:0; width:110px; height:72px; overflow:hidden; border-radius:var(--r); }
.ni-img img { width:100%; height:100%; object-fit:cover; transition:transform .3s; }
.ni:hover .ni-img img { transform:scale(1.04); }
.ni-body { flex:1; min-width:0; }
.ni-top { display:flex; align-items:center; gap:8px; margin-bottom:6px; }
.ni-cat { background:var(--blue-light); color:var(--blue); font-size:.6rem; font-weight:700; padding:1px 7px; border-radius:2px; border-left:2px solid var(--blue); }
.ni-ttl { font-size:.9rem; font-weight:700; line-height:1.5; display:block; margin-bottom:6px; transition:color .15s; }
.ni-ttl:hover { color:var(--blue); }
.ni-excerpt { font-size:.78rem; color:var(--sub); line-height:1.7; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; margin-bottom:5px; }
.ni-meta { font-size:.68rem; color:var(--muted); }

/* ===== PAGINATION ===== */
.pagination { display:flex; gap:4px; margin-top:32px; flex-wrap:wrap; }
.pagination a,.pagination span { display:inline-flex; align-items:center; justify-content:center; padding:8px 14px; border-radius:3px; font-size:.8rem; font-weight:600; border:1px solid var(--line); }
.pagination a:hover { border-color:var(--blue); color:var(--blue); background:var(--blue-dim); }
.pagination .current { background:var(--blue); color:#fff; border-color:var(--blue); }

/* ===== SIDEBAR ===== */
.side-card { background:var(--card); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; margin-bottom:24px; }
.side-hd { background:var(--dark); color:#fff; font-size:.65rem; font-weight:800; letter-spacing:.14em; padding:10px 16px; text-transform:uppercase; display:flex; align-items:center; gap:8px; }
.side-hd::before { content:''; display:block; width:3px; height:12px; background:var(--blue); border-radius:1px; flex-shrink:0; }
.hot-list { padding:4px 0; }
.hi { display:flex; align-items:flex-start; gap:10px; padding:10px 16px; }
.hi:not(:last-child) { border-bottom:1px solid var(--line); }
.hi-n { font-size:.65rem; font-weight:800; min-width:22px; width:22px; height:22px; display:flex; align-items:center; justify-content:center; border-radius:3px; flex-shrink:0; margin-top:1px; }
.hi-n.r1 { background:var(--blue); color:#fff; }
.hi-n.r2 { background:#3377dd; color:#fff; }
.hi-n.r3 { background:#6699ee; color:#fff; }
.hi-n.rx { background:var(--line); color:var(--sub); }
.hi-w { font-size:.78rem; line-height:1.55; }
.hi-w a:hover { color:var(--blue); }
.side-recent-item { display:flex; gap:10px; padding:10px 16px; border-bottom:1px solid var(--line); align-items:flex-start; }
.side-recent-item:last-child { border-bottom:none; }
.side-recent-img { flex-shrink:0; width:64px; height:46px; overflow:hidden; border-radius:var(--r); }
.side-recent-img img { width:100%; height:100%; object-fit:cover; }
.side-recent-body { flex:1; min-width:0; display:flex; align-items:flex-start; gap:6px; }
.side-recent-body .hi-n { width:22px; min-width:22px; height:22px; flex-shrink:0; display:inline-flex; align-items:center; justify-content:center; border-radius:3px; font-size:.65rem; font-weight:800; margin-top:1px; }
.side-recent-ttl { font-size:.76rem; font-weight:600; line-height:1.5; flex:1; display:block; }
.side-recent-ttl:hover { color:var(--blue); }

/* ===== SINGLE ===== */
.single-wrap { max-width:var(--max); margin:0 auto; padding:32px 24px; display:grid; grid-template-columns:1fr 300px; gap:36px; }
.single-header { margin-bottom:22px; }
.single-top { display:flex; align-items:center; gap:10px; margin-bottom:12px; flex-wrap:wrap; }
.single-cat { background:var(--blue); color:#fff; font-size:.62rem; font-weight:800; padding:3px 12px; border-radius:2px; }
.single-date { font-size:.75rem; color:var(--sub); }
.single-title { font-size:1.6rem; font-weight:900; line-height:1.45; margin-bottom:14px; letter-spacing:-.01em; }
.single-thumb { width:100%; aspect-ratio:16/9; object-fit:cover; border-radius:var(--r); margin-bottom:28px; }
.article-body { background:var(--card); border-radius:var(--r); padding:32px 36px; border:1px solid var(--line); font-size:.93rem; line-height:1.95; }
.article-body h2 { font-size:1.1rem; font-weight:800; color:var(--dark); border-left:4px solid var(--blue); padding-left:14px; margin:32px 0 14px; }
.article-body h3 { font-size:1rem; font-weight:700; color:var(--dark); margin:24px 0 10px; }
.article-body p { margin-bottom:18px; color:var(--text); }
.article-body p:last-child { margin-bottom:0; }
.photo-credit { font-size:.65rem; color:var(--muted); margin:8px 0 20px; text-align:right; }
.photo-credit a { color:var(--blue); text-decoration:underline; }
.yt-wrap { margin:28px 0; background:var(--bg); border-radius:var(--r); overflow:hidden; border:1px solid var(--line); }
.yt-label { background:var(--dark); color:#fff; font-size:.65rem; font-weight:800; padding:8px 16px; letter-spacing:.06em; }
.yt-wrap iframe { width:100%; aspect-ratio:16/9; display:block; }
.related-wrap { margin-top:32px; }
.related-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.related-card { background:var(--card); border:1px solid var(--line); border-radius:var(--r); overflow:hidden; transition:box-shadow .2s; }
.related-card:hover { box-shadow:0 4px 14px rgba(0,85,204,.1); }
.related-card img { width:100%; aspect-ratio:16/9; object-fit:cover; }
.related-card-body { padding:10px 12px; }
.related-card-ttl { font-size:.78rem; font-weight:700; line-height:1.45; }
.related-card-ttl:hover { color:var(--blue); }

/* ===== ARCHIVE ===== */
.archive-wrap { max-width:var(--max); margin:0 auto; padding:32px 24px; display:grid; grid-template-columns:1fr 300px; gap:36px; }
.archive-title { font-size:1.2rem; font-weight:800; color:var(--dark); border-left:4px solid var(--blue); padding-left:14px; margin-bottom:24px; }

/* ===== FOOTER ===== */
.site-footer { background:var(--dark); color:rgba(255,255,255,.5); margin-top:60px; }
.ft-top-inner { max-width:var(--max); margin:0 auto; padding:40px 24px; display:grid; grid-template-columns:2.5fr 1fr 1fr; gap:40px; border-bottom:1px solid rgba(255,255,255,.07); }
.ft-brand { display:flex; align-items:center; gap:10px; margin-bottom:14px; }
.ft-badge { background:var(--blue); color:#fff; font-size:.75rem; font-weight:800; padding:5px 12px; border-radius:3px; }
.ft-name { color:#fff; font-size:1rem; font-weight:800; }
.ft-desc { font-size:.78rem; line-height:1.85; color:rgba(255,255,255,.38); }
.ft-col-ttl { color:rgba(255,255,255,.7); font-size:.7rem; font-weight:800; letter-spacing:.1em; text-transform:uppercase; margin-bottom:12px; }
.ft-links { list-style:none; display:flex; flex-direction:column; gap:8px; }
.ft-links a { font-size:.78rem; color:rgba(255,255,255,.38); transition:color .15s; }
.ft-links a:hover { color:#fff; }
.ft-bottom { max-width:var(--max); margin:0 auto; padding:16px 24px; display:flex; align-items:center; justify-content:space-between; font-size:.68rem; color:rgba(255,255,255,.22); }

/* ===== PAGE / 404 ===== */
.content-wrap { max-width:var(--max); margin:0 auto; padding:48px 24px; }
.page-content { background:var(--card); border-radius:var(--r); padding:40px; border:1px solid var(--line); }
.page-content h1 { font-size:1.5rem; font-weight:800; margin-bottom:16px; }
.page-content p { font-size:.9rem; line-height:1.9; margin-bottom:12px; }

/* ===== ADMIN ===== */
.rt-status-box { background:var(--bg); border-radius:4px; padding:16px; margin:16px 0; font-size:.82rem; line-height:1.8; border:1px solid var(--line); }
.rt-btn { background:var(--blue); color:#fff; border:none; padding:8px 20px; border-radius:4px; cursor:pointer; font-size:.82rem; font-weight:700; margin-right:8px; }
.rt-btn:hover { opacity:.85; }
.rt-btn.danger { background:#c00; }

/* ===== BREADCRUMB ===== */
.breadcrumb { background:#fff; border-bottom:1px solid var(--line); }
.breadcrumb-inner { max-width:var(--max); margin:0 auto; padding:9px 24px; font-size:.72rem; color:var(--muted); display:flex; align-items:center; flex-wrap:wrap; gap:4px; }
.breadcrumb-inner a { color:var(--sub); }
.breadcrumb-inner a:hover { color:var(--blue); }
.bc-sep { color:var(--line-dark); margin:0 2px; }

/* ===== RESPONSIVE ===== */
@media (max-width:960px) {
    .grid,.single-wrap,.archive-wrap { grid-template-columns:1fr; }
    .sidebar,.single-sidebar { display:none; }
    .card-grid { grid-template-columns:repeat(2,1fr); }
    .related-grid { grid-template-columns:repeat(2,1fr); }
    .ft-top-inner { grid-template-columns:1fr 1fr; gap:24px; }
    .hamburger { display:flex; }
    .site-nav { display:none; }
    .nav-strip { display:none; }
    .feat-title-overlay { font-size:1.2rem; }
}
@media (max-width:640px) {
    /* top-bar */
    .top-bar-inner { padding:0 12px; }
    .top-bar-tag { display:none; }

    /* ヘッダー */
    .header-main { padding:10px 14px; }
    .logo-mark { width:34px; height:34px; }
    .logo-mark svg { width:19px; height:19px; }
    .logo-name { font-size:.92rem; }
    .logo-tagline { display:none; }
    .hamburger span { width:20px; }
}
@media (max-width:540px) {
    .card-grid { grid-template-columns:1fr; }
    .related-grid { grid-template-columns:1fr; }
    .single-title { font-size:1.25rem; }
    .article-body { padding:20px; }
    .ni-img { width:88px; height:60px; }
    .feat-title-overlay { font-size:1rem; }
    .ft-top-inner { grid-template-columns:1fr; }
    .wrap { padding-left:14px; padding-right:14px; }
}
}

/* ===== ARTICLE HEADER (single.php) ===== */
.art-wrap { background:#fff; border-radius:var(--r); border:1px solid var(--line); overflow:hidden; }

.art-header { padding:32px 36px 0; }

/* カテゴリバッジ */
.art-cats { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:16px; }
.art-cat {
    display:inline-block;
    font-size:.68rem;
    font-weight:700;
    letter-spacing:.06em;
    text-transform:uppercase;
    color:#fff;
    background:var(--blue);
    padding:4px 12px;
    border-radius:3px;
    text-decoration:none;
    transition:opacity .2s;
}
.art-cat:hover { opacity:.8; }

/* タイトル */
.art-h1 {
    font-size:1.75rem;
    font-weight:800;
    line-height:1.35;
    color:var(--dark);
    margin:0 0 18px;
    letter-spacing:-.01em;
}

/* メタ情報 */
.art-meta {
    display:flex;
    flex-wrap:wrap;
    gap:16px;
    align-items:center;
    font-size:.78rem;
    color:#888;
    margin-bottom:20px;
}
.art-meta-item {
    display:flex;
    align-items:center;
    gap:5px;
}
.art-meta-item svg { opacity:.6; flex-shrink:0; }
.art-meta-cat {
    color:var(--blue);
    font-weight:600;
}

/* 区切り線 */
.art-divider {
    height:3px;
    background:linear-gradient(90deg, var(--blue) 0%, #e8f0fe 60%, transparent 100%);
    margin-bottom:0;
    border-radius:2px;
}

/* アイキャッチ */
.art-thumb { line-height:0; }
.art-thumb img { width:100%; height:auto; display:block; }
.art-photo-credit { font-size:.72rem; color:#999; padding:6px 36px; background:#fafafa; border-bottom:1px solid var(--line); }
.art-photo-credit a { color:#888; text-decoration:underline; }

/* 本文 */
.art-body { padding:28px 36px 32px; font-size:.93rem; line-height:1.95; color:var(--text); }
.art-body h2 { font-size:1.1rem; font-weight:800; color:var(--dark); border-left:4px solid var(--blue); padding-left:14px; margin:32px 0 14px; }
.art-body h3 { font-size:1rem; font-weight:700; color:var(--dark); margin:24px 0 10px; }
.art-body p { margin-bottom:18px; }
.art-body p:last-child { margin-bottom:0; }

/* ===== TAGS ===== */
.art-tags {
    display:flex;
    align-items:flex-start;
    gap:12px;
    padding:20px 36px 28px;
    border-top:1px solid var(--line);
    flex-wrap:wrap;
}
.art-tags-label {
    display:inline-flex;
    align-items:center;
    gap:5px;
    font-size:.72rem;
    font-weight:700;
    letter-spacing:.07em;
    text-transform:uppercase;
    color:#aaa;
    white-space:nowrap;
    margin-top:3px;
}
.art-tags-list { display:flex; flex-wrap:wrap; gap:8px; }
.art-tag {
    display:inline-block;
    font-size:.75rem;
    font-weight:600;
    color:var(--blue);
    background:#eef3ff;
    border:1px solid #c8d9ff;
    padding:4px 12px;
    border-radius:20px;
    text-decoration:none;
    transition:background .2s, color .2s;
}
.art-tag:hover { background:var(--blue); color:#fff; border-color:var(--blue); }

@media (max-width:640px) {
    .art-header { padding:20px 20px 0; }
    .art-h1 { font-size:1.3rem; }
    .art-body { padding:20px; }
    .art-tags { padding:16px 20px 20px; }
}