/* BicTree 実績動画 — リンク集（link.bictree.net）の緑基調に合わせた見た目 */
:root{ --g:#2e8b57; --g-d:#1f6b3a; --ink:#25302b; --sub:#6b7a71; --line:#dbe5de; --bg:#f4f7f5; --warn:#c62828; }
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Yu Gothic","Hiragino Kaku Gothic ProN","Meiryo",sans-serif;line-height:1.6}

.top{background:linear-gradient(135deg,#1f6b3a,#2e8b57);color:#fff;padding:14px 18px;
  display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.top h1{font-size:20px;margin:0}
.top .back{color:#d8ece0;text-decoration:none;font-size:13px}
.top .back:hover{color:#fff}
.top .acts{margin-left:auto;display:flex;gap:8px;align-items:center}

main{max-width:1100px;margin:0 auto;padding:18px 16px 60px}
section{margin-bottom:26px}
h2{font-size:16px;color:var(--g-d);border-left:4px solid var(--g);padding-left:8px;margin:0 0 12px}
h2 .n{font-size:12px;color:var(--sub);font-weight:400}

.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;
  box-shadow:0 1px 3px rgba(0,0,0,.05)}
.thumb{display:block;width:100%;padding:0;border:0;background:#000;cursor:pointer;position:relative;line-height:0}
.thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;display:block}
.thumb .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:34px;text-shadow:0 2px 8px rgba(0,0,0,.6);opacity:.9}
.thumb:hover .play{opacity:1;transform:scale(1.08);transition:.15s}
.meta{padding:10px 12px}
.meta .title{font-size:14px;font-weight:700}
.tag{display:inline-block;margin-top:4px;padding:1px 8px;border-radius:10px;
  background:#e8f3ec;color:var(--g-d);font-size:11px;font-weight:700}
.del{margin-top:8px}

.btn{display:inline-block;padding:7px 14px;background:var(--g);color:#fff;border:0;border-radius:7px;
  font-size:13px;font-weight:700;cursor:pointer;text-decoration:none;font-family:inherit}
.btn:hover{filter:brightness(1.1)}
.btn.sub{background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.5)}
main .btn.sub{background:#fff;color:var(--g-d);border:1px solid var(--g)}
.btn.danger{background:var(--warn)}
.btn.sm{padding:3px 10px;font-size:12px}

.flash{background:#e6f4ea;border:1px solid #b7dfc4;color:#1b7f3b;padding:8px 12px;
  border-radius:8px;margin-bottom:14px;font-weight:700}
.flash.err{background:#fde8e8;border-color:#f3bcbc;color:var(--warn)}
.empty{text-align:center;color:var(--sub);padding:60px 0}
footer{text-align:center;color:var(--sub);font-size:12px;padding:20px}

/* モーダル（再生・ログイン・追加） */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);display:flex;align-items:center;
  justify-content:center;padding:16px;z-index:50}
.modal[hidden]{display:none}
.box{background:#fff;border-radius:12px;width:min(900px,100%);overflow:hidden}
.box.small{width:min(400px,100%)}
.bar{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;
  background:var(--g-d);color:#fff;font-weight:700;font-size:14px}
.bar button,.bar a{background:none;border:0;color:#fff;font-size:18px;cursor:pointer;text-decoration:none}
.frame{aspect-ratio:16/9;background:#000}
.frame iframe{width:100%;height:100%;border:0;display:block}
.pad{padding:16px}
.pad label{display:block;margin-bottom:12px;font-size:13px;color:var(--sub)}
.pad input,.pad select{width:100%;padding:8px;border:1px solid var(--line);border-radius:6px;
  font-size:14px;font-family:inherit;margin-top:3px;color:var(--ink)}
.pad input:focus,.pad select:focus{outline:2px solid #e8f3ec;border-color:var(--g)}
.row{display:flex;gap:8px;justify-content:flex-end;align-items:center}

@media (max-width:600px){
  .top h1{font-size:17px;width:100%;order:2}
  .top .acts{margin-left:0;order:3}
  .grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
}