@import url("https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@500;700;800&display=swap");

/* ==========================================================
   配信マルチビューワー  —  illustnouka.com
   すべてのセレクタを #mvApp 配下に限定しているため、
   サイト本体のデザインには一切影響しません。
   ========================================================== */

#mvApp{
  --mv-bg:#0e0e14;
  --mv-surface:#171722;
  --mv-surface2:#1f1f2e;
  --mv-border:#2c2c3d;
  --mv-accent:#9147ff;
  --mv-text:#eceaf2;
  --mv-muted:#8d89a0;
  --mv-live:#ff4b4b;

  background:
    radial-gradient(1200px 600px at 20% -10%, #241a3d 0%, transparent 60%),
    radial-gradient(900px 500px at 90% 10%, #2a1526 0%, transparent 55%),
    var(--mv-bg);
  color:var(--mv-text);
  font-family:"M PLUS Rounded 1c","Hiragino Kaku Gothic ProN",sans-serif;
  line-height:1.6;
  display:flex;
  flex-direction:column;
  height:82vh;
  min-height:520px;
  border:1px solid var(--mv-border);
  border-radius:14px;
  overflow:hidden;
  position:relative;
}
#mvApp *{box-sizing:border-box;}
#mvApp div,#mvApp span,#mvApp aside,#mvApp form,#mvApp p{margin:0;}

/* ---------- 上部バー ---------- */
#mvApp .mv-header{
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:14px 18px;
  background:rgba(23,23,34,.82);
  border-bottom:1px solid var(--mv-border);
  flex:0 0 auto;
}
#mvApp .brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.02rem;color:var(--mv-text);}
#mvApp .brand .dot{
  width:11px;height:11px;border-radius:50%;
  background:var(--mv-live);
  animation:mvPulse 2s infinite;
}
@keyframes mvPulse{
  0%{box-shadow:0 0 0 0 rgba(255,75,75,.55);}
  70%{box-shadow:0 0 0 9px rgba(255,75,75,0);}
  100%{box-shadow:0 0 0 0 rgba(255,75,75,0);}
}

#mvApp .add-form{display:flex;gap:8px;flex:1;min-width:260px;max-width:560px;}
#mvApp .add-form input[type=text]{
  flex:1;
  background:var(--mv-bg);
  color:var(--mv-text);
  border:1px solid var(--mv-border);
  border-radius:9px;
  padding:10px 13px;
  font-size:.9rem;
  font-family:inherit;
  margin:0;
  box-shadow:none;
  transition:border-color .15s, box-shadow .15s;
}
#mvApp .add-form input[type=text]:focus{
  outline:none;border-color:var(--mv-accent);
  box-shadow:0 0 0 3px rgba(145,71,255,.18);
}

#mvApp button{
  font-family:inherit;font-weight:700;cursor:pointer;
  border:none;border-radius:9px;
  padding:10px 16px;font-size:.88rem;line-height:1.2;
  background:linear-gradient(135deg,var(--mv-accent),#6d2fd0);
  color:#fff;
  margin:0;
  box-shadow:none;
  text-shadow:none;
  transition:filter .15s, transform .08s;
}
#mvApp button:hover{filter:brightness(1.12);color:#fff;}
#mvApp button:active{transform:translateY(1px);}
#mvApp button.ghost{
  background:transparent;border:1px solid var(--mv-border);
  color:var(--mv-muted);font-weight:600;
}
#mvApp button.ghost:hover{border-color:var(--mv-accent);color:var(--mv-text);}
#mvApp button.ghost.on{border-color:var(--mv-accent);color:#fff;background:rgba(145,71,255,.18);}

#mvApp .layout-picker{display:flex;gap:5px;}
#mvApp .lay{
  width:36px;height:30px;border-radius:7px;
  border:1px solid var(--mv-border);background:var(--mv-bg);
  display:grid;gap:2px;padding:4px;cursor:pointer;
  transition:border-color .15s;
}
#mvApp .lay:hover{border-color:var(--mv-accent);}
#mvApp .lay.active{border-color:var(--mv-accent);background:rgba(145,71,255,.16);}
#mvApp .lay i{background:var(--mv-muted);border-radius:1px;display:block;}
#mvApp .lay.active i{background:var(--mv-accent);}
#mvApp .lay-1{grid-template:1fr/1fr;}
#mvApp .lay-2{grid-template:1fr/1fr 1fr;}
#mvApp .lay-3{grid-template:1fr 1fr/1fr 1fr;}
#mvApp .lay-3 i:first-child{grid-row:span 2;}
#mvApp .lay-4{grid-template:1fr 1fr/1fr 1fr;}

/* ---------- 画面エリア ---------- */
#mvApp .stage{flex:1;display:flex;gap:10px;padding:12px;min-height:0;}
#mvApp .grid{
  flex:1;display:grid;gap:10px;min-height:0;
  grid-template-columns:1fr 1fr;
  grid-auto-rows:1fr;
}
#mvApp .grid.n1{grid-template-columns:1fr;}
#mvApp .grid.n2{grid-template-columns:1fr 1fr;grid-auto-rows:1fr;}
#mvApp .grid.n3{grid-template-columns:2fr 1fr;grid-template-rows:1fr 1fr;}

#mvApp .grid.n4{grid-template-columns:1fr 1fr;grid-template-rows:1fr 1fr;}

#mvApp .pane{
  position:relative;
  background:var(--mv-surface);
  border:1px solid var(--mv-border);
  border-radius:12px;
  overflow:hidden;
  min-height:160px;
  display:flex;flex-direction:column;
  transition:border-color .18s, box-shadow .18s;
}
#mvApp .pane.active{
  border-color:var(--mv-accent);
  box-shadow:0 0 0 1px rgba(145,71,255,.35), 0 8px 30px rgba(145,71,255,.12);
}
#mvApp .pane-head{
  display:flex;align-items:center;gap:8px;
  padding:7px 10px;
  background:rgba(31,31,46,.9);
  border-bottom:1px solid var(--mv-border);
  font-size:.8rem;
  flex:0 0 auto;
}
#mvApp .tag{
  font-size:.66rem;font-weight:800;letter-spacing:.04em;
  padding:2px 7px;border-radius:5px;flex:0 0 auto;
}
#mvApp .tag.yt{background:#ff0033;color:#fff;}
#mvApp .tag.tw{background:var(--mv-accent);color:#fff;}
#mvApp .pane-name{
  flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  color:var(--mv-text);font-weight:500;
}
#mvApp button.icon-btn{
  background:transparent;border:1px solid transparent;
  color:var(--mv-muted);padding:3px 7px;font-size:.78rem;border-radius:6px;
  flex:0 0 auto;font-weight:600;
}
#mvApp button.icon-btn:hover{background:rgba(255,255,255,.07);color:var(--mv-text);}
#mvApp button.icon-btn.audio-on{color:#fff;background:var(--mv-accent);}
#mvApp .frame-box{flex:1;position:relative;background:#000;min-height:0;}
#mvApp .frame-box iframe{position:absolute;inset:0;width:100%;height:100%;border:0;margin:0;}

#mvApp .empty-pane{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:8px;color:var(--mv-muted);font-size:.84rem;text-align:center;padding:18px;
  border:2px dashed var(--mv-border);border-radius:12px;
  background:rgba(255,255,255,.012);
}
#mvApp .empty-pane b{color:var(--mv-text);font-size:.92rem;font-weight:700;}

/* ---------- チャット ---------- */
#mvApp .chat{
  flex:0 0 330px;
  background:var(--mv-surface);
  border:1px solid var(--mv-border);
  border-radius:12px;
  overflow:hidden;
  display:none;
  flex-direction:column;
}
#mvApp .chat.show{display:flex;}
#mvApp .chat-head{
  padding:7px 10px;font-size:.8rem;font-weight:700;
  border-bottom:1px solid var(--mv-border);
  background:rgba(31,31,46,.9);
  display:flex;align-items:center;gap:8px;
}
#mvApp .chat-head #mvChatTitle{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
#mvApp .chat-head button.icon-btn{border:1px solid var(--mv-border);}
#mvApp .chat iframe{flex:1;width:100%;border:0;background:#0e0e14;margin:0;}

/* ---------- 通知・注記 ---------- */
#mvApp .notice{
  margin:0 12px 12px;padding:11px 14px;
  background:rgba(255,75,75,.09);
  border:1px solid rgba(255,75,75,.3);
  border-radius:9px;font-size:.8rem;color:#ffb3b3;
  display:none;
}
#mvApp .notice.show{display:block;}
#mvApp .hint-bar{
  padding:10px 18px 14px;color:var(--mv-muted);font-size:.76rem;
  display:flex;gap:16px;flex-wrap:wrap;align-items:center;
  flex:0 0 auto;
}
#mvApp .hint-bar code{
  background:var(--mv-surface2);padding:2px 6px;border-radius:4px;
  font-family:ui-monospace,monospace;color:#c3b6e0;font-size:.74rem;
}

/* ---------- スマホ ---------- */
@media (max-width:760px){
  #mvApp{height:auto;min-height:0;}
  #mvApp .stage{flex-direction:column;}
  #mvApp .grid{min-height:56vh;}
  #mvApp .grid.n2,#mvApp .grid.n3,#mvApp .grid.n4{
    grid-template-columns:1fr;grid-template-rows:none;
    grid-auto-rows:minmax(180px,1fr);
  }
  #mvApp .grid.n3 .pane.mv-first{grid-row:auto;}
  #mvApp .chat{flex:0 0 320px;}
}


/* ---------- 同期ボタン ---------- */
#mvApp button.sync{background:linear-gradient(135deg,#ff4b4b,#c21d1d);}
#mvApp button:disabled{opacity:.4;cursor:default;filter:none;}
#mvApp button.icon-btn.delaying{color:#ffd08a;background:rgba(255,160,40,.16);}
#mvApp .notice.info{background:rgba(145,71,255,.1);border-color:rgba(145,71,255,.35);color:#d9c7ff;}

/* プレイヤーAPIが差し込む要素も枠いっぱいに */
#mvApp .frame-box > div{position:absolute;inset:0;width:100%;height:100%;}

/* n3レイアウトの大きい枠は order=0 の枠 */
#mvApp .grid.n3 .pane.mv-first{grid-row:span 2;}

/* ---------- カウントダウン ---------- */
#mvApp .countdown{
  position:fixed;inset:0;z-index:99999;
  display:none;align-items:center;justify-content:center;
  background:rgba(8,8,14,.78);
}
#mvApp .countdown.show{display:flex;}
#mvApp .countdown span{
  font-size:9rem;font-weight:800;color:#fff;line-height:1;
  text-shadow:0 0 40px rgba(145,71,255,.8);
  animation:mvCdPop .9s ease-out;
}
@keyframes mvCdPop{
  0%{transform:scale(.4);opacity:0;}
  35%{transform:scale(1.1);opacity:1;}
  100%{transform:scale(1);opacity:1;}
}