:root { color-scheme: dark; }
* { box-sizing:border-box; }
body { margin:0; font-family: system-ui, Arial; background:#0b0d10; color:#e8eef6; }
a { color:#a7c7ff; text-decoration:none; }
a:hover { text-decoration:underline; }
.wrap { max-width: 1100px; margin: 0 auto; padding: 16px; }

.topbar { position:sticky; top:0; background:#0b0d10cc; backdrop-filter: blur(10px); border-bottom:1px solid #202633; }
.topbar .wrap { display:flex; align-items:center; justify-content:space-between; gap:12px; }
.brand { font-weight:800; letter-spacing:.2px; }
.nav { display:flex; gap:12px; align-items:center; }
.linkbtn { background:transparent; border:none; color:#a7c7ff; cursor:pointer; padding:0; }

.card { background:#111623; border:1px solid #202633; border-radius:18px; padding:14px; box-shadow: 0 10px 30px rgba(0,0,0,.25); }
.grid { display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap:12px; }
@media (max-width: 900px) { .grid { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 560px) { .grid { grid-template-columns: 1fr; } }

.input, textarea, select { width:100%; background:#0e1320; border:1px solid #273049; color:#e8eef6; padding:10px 12px; border-radius:12px; }
textarea { min-height: 120px; resize: vertical; }
.btn { background:#2a74ff; border:none; color:#fff; padding:10px 14px; border-radius:12px; cursor:pointer; font-weight:700; }
.btn.secondary { background:#1a2336; border:1px solid #273049; }
.row { display:flex; gap:12px; }
.row > * { flex:1; }

.footer { opacity:.8; padding-bottom: 26px; }
.muted { color:#9aa9c2; font-size: 13px; }
.chatlayout { display:grid; grid-template-columns: 320px 1fr; gap:12px; align-items:start; }
@media (max-width: 900px) { .chatlayout { grid-template-columns: 1fr; } .chatside { order:2; } }

.chatside { height: calc(100vh - 170px); overflow:auto; }
.convlist { display:flex; flex-direction:column; gap:8px; }
.convitem { display:block; padding:10px; border-radius:14px; border:1px solid #202633; background:#0e1320; }
.convitem .title { font-weight:800; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.convitem .sub { font-size:12px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.convitem.active { outline:2px solid rgba(42,116,255,.55); }

.chatmain { height: calc(100vh - 170px); display:flex; flex-direction:column; }
.chatlog { flex:1; overflow:auto; display:flex; flex-direction:column; gap:10px; padding:6px; }
.chatbar { display:flex; gap:10px; align-items:center; padding-top:10px; }

.bubble { border:1px solid #202633; border-radius:16px; padding:10px 12px; }
.bubble.user { background:#0e1320; }
.bubble.assistant { background:#111c2f; }
.bubble .meta { font-size:12px; margin-bottom:6px; }
.bubble .content { white-space:pre-wrap; }
.stylegrid { display:grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap:10px; }
@media (max-width: 900px) { .stylegrid { grid-template-columns: repeat(3, minmax(0,1fr)); } }
@media (max-width: 560px) { .stylegrid { grid-template-columns: repeat(2, minmax(0,1fr)); } }

.stylecard { border:1px solid #202633; border-radius:16px; padding:10px; background:#0e1320; cursor:pointer; }
.stylecard.active { outline:2px solid rgba(42,116,255,.55); }
.stylecard img { width:100%; aspect-ratio: 1/1; object-fit:cover; border-radius:12px; border:1px solid #202633; }
.stylecard .label { margin-top:8px; font-weight:800; font-size:13px; }