/* Cyberpunk-ish minimal CSS */
:root{--bg:#05060a;--neon:#00ffd1;--accent:#ff00f7;--muted:#9aa9b2}
body{margin:0;font-family:Inter, "Noto Sans JP", sans-serif;background:linear-gradient(180deg,#07070b 0%,var(--bg) 100%);color:#e6f3ff}
.app{display:flex;height:100vh}
.sidebar{width:260px;padding:20px;background:rgba(0,0,0,0.35);backdrop-filter:blur(4px);border-right:1px solid rgba(255,255,255,0.03)}
.logo{font-size:20px;color:var(--neon);margin:0 0 12px}
.rooms{margin-top:12px}
.rooms ul{list-style:none;padding:0;margin:0}
.rooms li{padding:8px;border-radius:6px;cursor:pointer}
.rooms li.active{background:rgba(0,255,210,0.06);box-shadow:0 0 8px rgba(0,255,210,0.06)}
.chat{flex:1;display:flex;flex-direction:column}
.chat-header{padding:14px;border-bottom:1px solid rgba(255,255,255,0.03);font-weight:600}
.messages{flex:1;padding:16px;overflow:auto}
.message{padding:8px;margin-bottom:8px;border-radius:10px;background:rgba(255,255,255,0.03)}
.message .meta{font-size:12px;color:var(--muted)}
.message.system{background:rgba(255,255,255,0.02);font-style:italic}
.message.own{border:1px solid rgba(0,255,210,0.06)}
.message .content{margin-top:6px}
.message-form{display:flex;padding:12px;border-top:1px solid rgba(255,255,255,0.03)}
.message-form input{flex:1;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.06);margin-right:8px;background:transparent;color:inherit}
.message-form button{padding:10px 12px;border-radius:8px;border:none;background:linear-gradient(90deg,var(--neon),var(--accent));color:#000;font-weight:700}
.neon{box-shadow:0 0 10px rgba(0,255,210,0.06)}
.sidebar .wallet{margin-top:18px;color:var(--neon);font-weight:700}
small.hint{color:var(--muted);font-size:12px}