:root{--bg: #f3f4f6;--text: #222;--muted: #666;--border: rgba(0, 0, 0, .14);--primary: #003366;--accent: #0d6efd;--chip: #e8f1ff;--card: #e9edf3;--header-fg: #f0f4ff;--sidebar-max: 280px;--sidebar-min: 140px;--sidebar-basis: clamp(var(--sidebar-min), 30%, var(--sidebar-max));--header-h: 60px}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:Noto Sans JP,system-ui,-apple-system,Segoe UI,Roboto,Noto Sans JP,Hiragino Sans,Helvetica Neue,Arial,sans-serif;font-weight:400}a{color:inherit;text-decoration:none}.app-shell{height:100vh;display:flex;flex-direction:column;overflow:hidden}.app-header{background:var(--primary);color:var(--header-fg);position:sticky;top:0;z-index:10;padding:.5rem 1.5rem}.app-header__inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:12px}.app-header .app-title{margin:.2em 0;font-weight:700;line-height:1.1;font-size:1.4rem!important}@media (max-width: 520px){.app-header .app-title{font-size:.7rem!important}}.app-main{flex:1;width:100%;box-sizing:border-box;padding:0 1.5rem;background:transparent;display:flex;flex-direction:column;overflow:hidden;min-height:0}.header-menu-wrap{position:relative;display:flex;align-items:center}.header-menu-trigger{background:#ffffff14;border:1px solid rgba(255,255,255,.25);color:var(--header-fg);padding:8px 12px;border-radius:10px;font-size:14px}.header-menu{position:absolute;top:calc(100% + 8px);right:0;min-width:240px;background:#fff;color:var(--text);border:1px solid var(--border);border-radius:12px;padding:6px;box-shadow:0 8px 24px #0000002e;transform:scale(.98);opacity:0;pointer-events:none;transition:opacity .15s ease,transform .15s ease;z-index:20}.header-menu.open{transform:scale(1);opacity:1;pointer-events:auto}.header-menu-item{display:block;padding:10px 12px;border-radius:8px;font-size:14px;border:1px solid transparent;outline:none}.header-menu-item:hover,.header-menu-item:focus{background:#f4f7ff;border-color:#e2e8ff}.header-menu-item.active{background:#eef3ff;border-color:#c9d7ff;color:#1b3a6d;font-weight:700}.menu-sep{height:1px;margin:6px 4px;background:var(--border);border-radius:1px}.two-pane{flex:1;display:flex;min-height:0;overflow:hidden}.sidebar{flex:0 0 var(--sidebar-basis);width:auto;background:#fff;color:var(--text);border-right:1px solid var(--border);padding:16px;overflow:auto;flex-shrink:0}.sidebar a{display:block;padding:6px 10px;border-radius:6px;font-size:14px}.sidebar a:hover{background:#f0f4ff}.sidebar-header{background:transparent;color:inherit;border-radius:8px;padding:0;margin-bottom:12px}.content-pane{flex:1 1 auto;overflow:auto;min-height:0}.container{max-width:980px;margin:32px auto;padding:0 16px}.header{display:flex;align-items:center;gap:12px;margin-bottom:18px}.header h1{margin:0;font-size:20px;letter-spacing:.02em;font-weight:700}h1,h2,h3,h4,h5,h6{font-weight:700}.toolbar{display:flex;gap:8px;margin:12px 0 18px}input[type=text],textarea{background:#fff;border:1px solid var(--border);color:var(--text);padding:10px 12px;border-radius:10px;outline:none;flex:1}button,.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;border:0;padding:10px 14px;border-radius:10px;cursor:pointer}button.ghost,.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--border)}.grid{display:grid;gap:14px}.card{background:var(--card);border:1px solid var(--border);border-radius:14px;overflow:hidden}.card-inner{padding:16px}.chips{display:flex;gap:6px;flex-wrap:wrap}.chip{background:var(--chip);color:var(--primary);font-size:12px;padding:4px 8px;border-radius:999px;border:1px solid var(--border)}.markdown{color:#333;line-height:1.7;font-size:14px}.hr{height:1px;background:var(--border);border:0;margin:6px 0 0}.notice{background:#fff8e1;border:1px solid var(--border);border-radius:10px;padding:12px 14px;margin-bottom:16px;font-size:13px;color:#444;line-height:1.6}.thumb-img{width:100%;max-width:480px;height:auto;border-radius:8px;cursor:pointer;border:1px solid var(--border);display:block}.sort-tabs{display:flex;gap:6px;flex-wrap:nowrap;white-space:nowrap;overflow:hidden;padding:2px}.sort-tab{display:inline-flex;align-items:center;justify-content:center;padding:4px 8px;border-radius:8px;background:#fff;color:var(--text);border:1px solid var(--border);font-size:13px;line-height:1;text-decoration:none;word-break:keep-all;transition:background-color .15s ease,border-color .15s ease}.sort-tab:hover{background:#f7f7f7}.sort-tab:active{background:#eee}.sort-tab.active{background:#f2f6ff;border-color:#c9d7ff;color:#1b3a6d}@media (max-width: 320px){.sort-tab{font-size:12px;padding:4px 6px}}.mobile-only{display:none}@media (max-width: 900px){.mobile-only{display:block}.btn.hamburger{padding:8px 12px;font-size:14px;border-radius:10px}}@media (max-width: 900px){.two-pane{position:relative}.content-pane{flex:1 1 100%}.sidebar{position:fixed;z-index:30;top:0;left:0;height:100vh;width:min(86vw,320px);max-width:90vw;transform:translate(-100%);transition:transform .25s ease;box-shadow:2px 0 14px #0003;background:#fff;padding:16px;overflow:auto;border-right:1px solid var(--border)}.sidebar.open{transform:translate(0)}.drawer-backdrop{position:fixed;z-index:25;top:0;right:0;bottom:0;left:0;background:#00000052;opacity:0;pointer-events:none;transition:opacity .2s ease}.drawer-backdrop.show{opacity:1;pointer-events:auto}.sort-tabs{gap:6px}.sort-tab{padding:4px 8px;font-size:13px}}