:root {
    --bg: #0b0c10; --panel:#151821; --border:#25293a; --text:#e6e6ea;
    --muted:#a7aab8; --pri:#6d7cff; --pri-2:#5564ff;
  }
  * { box-sizing: border-box; }
  body { margin:0; font:14px/1.5 system-ui, -apple-system, Segoe UI, Roboto; color:var(--text); background:var(--bg); }
  .topbar { display:flex; justify-content:space-between; align-items:center; padding:12px 16px; border-bottom:1px solid var(--border); background:rgba(0,0,0,.2); position:sticky; top:0; backdrop-filter: blur(6px); }
  .brand { display:flex; align-items:center; gap:10px; }
  .logo { height:32px; width:auto; }
  .muted { color:var(--muted); margin-left:6px; }
  .grid { display:grid; gap:16px; grid-template-columns: 1fr 1fr 380px; padding:16px; max-width:1200px; margin:0 auto; }
  @media (max-width: 1024px){ 
    .grid{ grid-template-columns:1fr; } 
    .chat { grid-row: auto; }
  }
  
  /* 모바일 최적화 */
  @media (max-width: 768px) {
    .topbar { padding: 8px 12px; }
    .grid { padding: 12px; gap: 12px; }
    .card { padding: 12px; }
    .row { flex-wrap: wrap; }
    .remind-section { flex-direction: column; align-items: flex-start; gap: 6px; }
    .remind-section > * { width: 100%; max-width: none; }
    .chatlog { height: 400px; }
    input, select, button { padding: 12px; font-size: 16px; } /* iOS 줌 방지 */
    .logo { height: 24px; }
    .brand { gap: 6px; }
  }
  
  @media (max-width: 480px) {
    .grid { padding: 8px; gap: 8px; }
    .card { padding: 8px; }
    .topbar { padding: 6px 8px; }
    .chatlog { height: 300px; }
    h2 { font-size: 16px; margin: 2px 0 8px; }
  }
  .card { background:var(--panel); border:1px solid var(--border); border-radius:12px; padding:16px; }
  h2 { margin:4px 0 12px; font-size:18px; }
  .row { display:flex; gap:8px; }
  input, select { flex:1; background:#0e1118; color:var(--text); border:1px solid var(--border); border-radius:8px; padding:10px 12px; }
  .remind { max-width: 220px; }
  .todo-form { margin-bottom: 16px; }
  .remind-section { 
    display: flex; 
    align-items: center; 
    gap: 8px; 
    margin-top: 8px; 
    flex-wrap: wrap;
  }
  .remind-label { font-size: 12px; color: var(--muted); white-space: nowrap; }
  .remind-date { max-width: 140px; }
  .remind-time { max-width: 80px; }
  button { background:#1b1f2f; color:var(--text); border:1px solid var(--border); border-radius:8px; padding:10px 14px; cursor:pointer; }
  button.primary{ background:var(--pri); border-color:transparent; }
  button.primary:hover{ background:var(--pri-2); }
  button.small{ padding:6px 10px; font-size:12px; }
  button.ghost{ background:transparent; }
  .list { list-style:none; padding:0; margin:10px 0 0; display:flex; flex-direction:column; gap:8px; }
  .item { display:flex; justify-content:space-between; align-items:center; gap:8px; border:1px dashed var(--border); border-radius:10px; padding:10px; }
  .item .title.done{ text-decoration: line-through; color:var(--muted); }
  .actions { display:flex; align-items:center; gap:8px; }
  .rem { color:var(--muted); font-size:12px; }
  .chat { grid-row: 1 / span 2; }
  .chatlog { height: 520px; overflow:auto; border:1px solid var(--border); border-radius:10px; padding:12px; background:#0f1320; margin-bottom:10px; }
  .msg { margin-bottom:15px; }
  .msg-content { margin-top:5px; line-height:1.6; }
  .chat-link { color:var(--pri); text-decoration:none; }
  .chat-link:hover { text-decoration:underline; }
  .msg .who{ font-weight:600; margin-right:6px; }
  .foot { color:var(--muted); text-align:center; padding:18px 0 28px; }
  
  /* 광고 스타일 */
  .ad-container { margin: 16px auto; max-width: 1200px; padding: 0 16px; }
  .top-ad { border-bottom: 1px solid var(--border); padding-bottom: 16px; }
  .bottom-ad { border-top: 1px solid var(--border); padding-top: 16px; }
  
  /* 사이드바 광고를 위한 body 레이아웃 */
  body { position: relative; }
  .sidebar-ad { 
    position: fixed; 
    top: 50%; 
    transform: translateY(-50%); 
    width: 160px; 
    z-index: 1000; 
  }
  .sidebar-ad.left { left: 10px; }
  .sidebar-ad.right { right: 10px; }
  
  /* 대형 화면에서만 사이드바 광고 표시 */
  @media (max-width: 1440px) {
    .sidebar-ad { display: none; }
  }
  
  /* 모바일 광고 최적화 */
  @media (max-width: 768px) {
    .ad-container { margin: 12px auto; padding: 0 12px; }
    .top-ad, .bottom-ad { padding: 12px 0; }
  }