*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f5f6fa;--surface:#fff;--surface2:#f0f1f5;
  --border:#e2e4ec;--border2:#d0d3de;
  --text:#1a1d2e;--text-sub:#6b7280;--text-muted:#9ca3af;
  --accent:#5b6af0;--accent-h:#4555e8;--accent-soft:rgba(91,106,240,.1);
  --crimson:#8b1a2a;--crimson-soft:rgba(139,26,42,.08);
  --tag-bg:#eef0f8;--tag-active-bg:#5b6af0;
  --radius:10px;--radius-sm:6px;--radius-xs:4px;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 4px 12px rgba(0,0,0,.04);
  --shadow-lg:0 8px 32px rgba(0,0,0,.12);
  --nav-w:220px;--panel-w:340px;
}
body{background:var(--bg);color:var(--text);font-family:'Hiragino Kaku Gothic ProN','Noto Sans JP',sans-serif;font-size:14px;line-height:1.6;min-height:100vh}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{cursor:pointer;font-family:inherit;border:none;background:none}

.wrap{display:flex;min-height:100vh}

.sidenav{width:var(--nav-w);background:var(--surface);border-right:1px solid var(--border);position:fixed;top:0;left:0;height:100vh;display:flex;flex-direction:column;z-index:300;overflow-y:auto}
.sidenav-logo{padding:12px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:center}
.logo-img-link{display:block;width:100%}
.logo-img{width:100%;max-height:64px;object-fit:contain;display:block}
.sidenav-section{padding:10px 0}
.sidenav-label{font-size:10px;font-weight:700;color:var(--text-muted);letter-spacing:.08em;padding:6px 16px 4px;text-transform:uppercase}
.sidenav-link{display:flex;align-items:center;gap:8px;padding:9px 16px;color:var(--text-sub);font-size:13px;border-left:3px solid transparent;transition:all .15s}
.sidenav-link:hover{background:var(--surface2);color:var(--text);border-left-color:var(--border2)}
.sidenav-link.active{background:var(--accent-soft);color:var(--accent);border-left-color:var(--accent);font-weight:600}
.sidenav-link .ic{width:18px;text-align:center;font-size:15px}

.cat-trigger{display:flex;align-items:center;justify-content:space-between;width:100%;padding:9px 16px;color:var(--text-sub);font-size:13px;font-weight:600;cursor:pointer;transition:background .15s;background:none;border:none;text-align:left}
.cat-trigger:hover{background:var(--surface2);color:var(--text)}
.cat-trigger .arrow{font-size:10px;transition:transform .2s;color:var(--text-muted)}
.cat-trigger.open .arrow{transform:rotate(90deg)}
.cat-tags{display:none;padding:4px 12px 8px 28px;flex-wrap:wrap;gap:4px}
.cat-tags.open{display:flex}
.cat-tag-link{font-size:12px;padding:2px 9px;border-radius:20px;background:var(--tag-bg);color:var(--text-sub);border:1px solid transparent;transition:all .12s;white-space:nowrap}
.cat-tag-link:hover{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}
.cat-tag-link.active{background:var(--accent);color:#fff;border-color:var(--accent)}

.main-area{margin-left:var(--nav-w);flex:1;display:flex;flex-direction:column;min-width:0;transition:margin-right .25s}
.main-area.panel-open{margin-right:var(--panel-w)}

.topbar{background:var(--surface);border-bottom:1px solid var(--border);padding:10px 20px;position:sticky;top:0;z-index:200;display:flex;align-items:center;gap:12px;box-shadow:0 1px 0 var(--border)}
.search-wrap{flex:1;max-width:560px;position:relative}
.search-wrap input{width:100%;background:var(--surface2);border:1.5px solid var(--border);border-radius:var(--radius);padding:8px 44px 8px 14px;color:var(--text);font-size:14px;outline:none;transition:border-color .15s}
.search-wrap input:focus{border-color:var(--accent);background:#fff}
.search-wrap input::placeholder{color:var(--text-muted)}
.search-wrap .s-btn{position:absolute;right:6px;top:50%;transform:translateY(-50%);background:var(--accent);border:none;color:#fff;width:30px;height:30px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:14px;cursor:pointer}
.topbar-right{display:flex;gap:12px;margin-left:auto;font-size:13px;color:var(--text-sub)}
.topbar-right a{color:var(--text-sub);transition:color .15s}
.topbar-right a:hover{color:var(--accent)}

.filter-bar{background:var(--surface);border-bottom:1px solid var(--border);padding:8px 20px;display:flex;flex-wrap:wrap;align-items:center;gap:6px;min-height:44px}
.filter-bar:empty{display:none}
.filter-label{font-size:12px;color:var(--text-sub);font-weight:600;margin-right:4px}
.chip{display:inline-flex;align-items:center;gap:4px;background:var(--accent-soft);border:1px solid var(--accent);color:var(--accent);border-radius:20px;padding:3px 8px 3px 11px;font-size:12px;font-weight:500}
.chip-x{font-size:15px;line-height:1;opacity:.6;transition:opacity .1s;padding:0 2px}
.chip-x:hover{opacity:1}
.chip-clear{font-size:12px;color:var(--text-sub);border:1px solid var(--border);border-radius:20px;padding:3px 10px;cursor:pointer;background:#fff;transition:all .15s}
.chip-clear:hover{border-color:var(--text-sub);color:var(--text)}

.content{flex:1;padding:16px 20px}

.result-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;gap:8px;flex-wrap:wrap}
.result-count{font-size:15px;font-weight:700;color:var(--text)}
.result-count em{color:var(--accent);font-style:normal}
.sort-sel{background:var(--surface);border:1.5px solid var(--border);color:var(--text);border-radius:var(--radius-sm);padding:5px 10px;font-size:13px;outline:none;cursor:pointer}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.card{background:var(--surface);border-radius:var(--radius);overflow:hidden;border:1.5px solid var(--border);box-shadow:var(--shadow);cursor:pointer;transition:border-color .15s,box-shadow .15s,opacity .15s}
.card:hover{border-color:var(--accent);box-shadow:0 4px 16px rgba(91,106,240,.18);opacity:.92}
.card.selected{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.card-img img{width:100%;height:auto;display:block}

.no-result{text-align:center;padding:60px;color:var(--text-sub)}

.pager{display:flex;justify-content:center;gap:4px;margin-top:28px;padding-bottom:28px}
.pager a,.pager span{display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:var(--radius-sm);font-size:13px;border:1.5px solid var(--border);background:var(--surface);color:var(--text-sub);transition:all .1s}
.pager a:hover{background:var(--surface2);color:var(--text)}
.pager a.cur{background:var(--accent);color:#fff;border-color:var(--accent)}
.pager span{border:none;background:none}

.preview-panel{position:fixed;top:0;right:0;width:var(--panel-w);height:100vh;background:var(--surface);border-left:1px solid var(--border);box-shadow:var(--shadow-lg);z-index:250;display:flex;flex-direction:column;transform:translateX(100%);transition:transform .25s ease}
.preview-panel.open{transform:translateX(0)}
.panel-head{padding:12px 14px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.panel-head-title{font-size:13px;font-weight:700;color:var(--text-sub)}
.panel-close{width:28px;height:28px;border-radius:6px;background:var(--surface2);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--text-sub);transition:background .15s}
.panel-close:hover{background:var(--border);color:var(--text)}
.panel-img-wrap{flex-shrink:0;background:#f8f9fc;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:center;padding:12px;max-height:52vh;overflow:hidden}
.panel-img-wrap img{max-width:100%;max-height:100%;object-fit:contain;border-radius:var(--radius-sm)}
.panel-body{flex:1;overflow-y:auto;padding:14px}
.panel-title-text{font-size:14px;font-weight:700;color:var(--text);margin-bottom:10px}
.panel-open-btn{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:9px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-size:13px;font-weight:600;cursor:pointer;margin-bottom:14px;transition:background .15s}
.panel-open-btn:hover{background:var(--accent-h)}
.panel-tag{font-size:12px;background:var(--tag-bg);color:var(--text-sub);border-radius:var(--radius-xs);padding:2px 8px;cursor:pointer;transition:background .12s,color .12s}
.panel-tag:hover{background:var(--accent);color:#fff}
.panel-tag.active{background:var(--accent);color:#fff;cursor:default}

.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;padding:6px;border-radius:var(--radius-sm);background:var(--surface2);border:none;cursor:pointer;flex-shrink:0}
.hamburger span{display:block;height:2px;background:var(--text);border-radius:2px;transition:all .2s}
.nav-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:299}
.nav-overlay.open{display:block}

@media(max-width:900px){
  .sidenav{display:flex;transform:translateX(-100%);transition:transform .25s ease}
  .sidenav.open{transform:translateX(0)}
  .main-area{margin-left:0}
  .main-area.panel-open{margin-right:0}
  .preview-panel{width:100%}
  .hamburger{display:flex}
}
@media(max-width:480px){.grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}}