*{box-sizing:border-box}html,body{margin:0;padding:0;background:#08111f;color:#e5eefc;font-family:Inter,Pretendard,system-ui,sans-serif}a{text-decoration:none;color:inherit}button,input,textarea,select{font:inherit}button{cursor:pointer}.hidden{display:none!important}
.topbar{position:sticky;top:0;z-index:50;display:flex;justify-content:space-between;align-items:center;padding:14px 18px;background:rgba(8,17,31,.85);backdrop-filter:blur(14px);border-bottom:1px solid rgba(148,163,184,.12)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.02em}.brand-mark{width:10px;height:10px;border-radius:50%;background:linear-gradient(135deg,#4fd1c5,#60a5fa);box-shadow:0 0 18px rgba(79,209,197,.8)}
.topnav{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.topnav a,.ghost-btn,.danger-btn,.primary-btn{min-height:44px;padding:10px 14px;border-radius:14px;border:1px solid rgba(148,163,184,.16)}.ghost-btn{background:#0f1b31;color:#d7e6ff}.danger-btn{background:#2b1118;color:#ffc9d4}.primary-btn{background:linear-gradient(135deg,#1d4ed8,#14b8a6);color:#fff;border:none}.top-user{color:#94a3b8}
.page-wrap{max-width:1320px;margin:0 auto;padding:18px}.flash-stack{display:grid;gap:10px;margin-bottom:14px}.flash-item{padding:12px 14px;border-radius:14px;background:#0f1b31;border:1px solid rgba(148,163,184,.16)}
.hero-card,.search-card,.panel-card,.room-card,.side-card,.room-head-card,.auth-card,.empty-card{background:linear-gradient(180deg,rgba(15,23,42,.96),rgba(8,17,31,.96));border:1px solid rgba(148,163,184,.14);border-radius:24px;box-shadow:0 18px 48px rgba(0,0,0,.25)}
.hero-card,.search-card,.panel-card{padding:22px}.hero-card h1{margin:0 0 10px;font-size:34px}.hero-card p,.subtle{color:#92a3be}.search-card{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center;margin-top:14px}.search-form,.code-form{display:flex;gap:10px;flex-wrap:wrap}.search-form input,.code-form input,.auth-form input,.auth-form textarea,.auth-form select{flex:1;min-height:48px;padding:12px 14px;border-radius:16px;border:1px solid rgba(148,163,184,.16);background:#0a1426;color:#f8fbff}.auth-form textarea{min-height:110px}
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.auth-shell{min-height:calc(100vh - 88px);display:grid;place-items:center;padding:22px}.auth-card{width:min(100%,430px);padding:28px}.auth-card h1{margin:0 0 6px}.auth-form{display:grid;gap:12px;margin-top:18px}.auth-form button{min-height:48px;border:none;border-radius:16px;background:linear-gradient(135deg,#1d4ed8,#14b8a6);color:#fff}.auth-link{display:block;margin-top:14px;color:#b5c7e6}
.chat-shell{display:grid;grid-template-columns:320px 1fr;gap:16px;min-height:calc(100vh - 130px)}.chat-side{display:grid;gap:14px}.room-head-card,.side-card{padding:18px}.room-head-card h1{margin:0 0 8px;font-size:28px}.presence-list{list-style:none;margin:12px 0 0;padding:0;display:grid;gap:10px}.presence-list li{display:flex;align-items:center;gap:10px;color:#d8e8ff}.presence-dot{width:10px;height:10px;border-radius:50%;background:#22c55e;box-shadow:0 0 12px rgba(34,197,94,.7)}
.chat-main{display:grid;grid-template-rows:1fr auto auto;gap:12px;min-height:0}.chat-box{overflow:auto;padding:18px;border-radius:28px;background:radial-gradient(circle at top right,rgba(20,184,166,.08),transparent 26%),#07101d;border:1px solid rgba(148,163,184,.12)}.bubble-row{display:grid;gap:6px;margin-bottom:12px}.bubble-row.mine{justify-items:end}.bubble-row.other{justify-items:start}.bubble-meta{display:flex;gap:10px;font-size:12px;color:#8da1bf;align-items:center}.bubble-meta .name{color:#cde1ff;font-weight:700}.bubble{max-width:min(72vw,540px);padding:12px 14px;border-radius:18px;word-break:break-word}.bubble.mine{background:linear-gradient(135deg,#155e75,#1d4ed8);color:#fff;border-bottom-right-radius:6px}.bubble.other{background:#0f1b31;color:#eff5ff;border:1px solid rgba(148,163,184,.1);border-bottom-left-radius:6px}.bubble-text{white-space:pre-wrap}.bubble-image,.bubble-video{display:block;max-width:min(60vw,320px);border-radius:14px;margin-bottom:8px}.read-chip{font-size:11px;color:#89f0e1;min-height:14px}.system-line{text-align:center;font-size:12px;color:#7d93b3;margin:10px 0}.upload-preview{padding:10px 0}.preview-card{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:12px 14px;border-radius:16px;background:#0f1b31;border:1px solid rgba(148,163,184,.12)}
.chat-composer{position:sticky;bottom:max(10px,env(safe-area-inset-bottom));display:grid;grid-template-columns:auto 1fr auto;gap:10px;align-items:end;padding:10px;border-radius:22px;background:rgba(8,17,31,.88);backdrop-filter:blur(14px);border:1px solid rgba(148,163,184,.14)}.chat-composer textarea{max-height:140px;resize:none;min-height:48px;padding:12px 14px;border-radius:18px;border:1px solid rgba(148,163,184,.14);background:#0a1426;color:#eff6ff}.icon-btn{width:48px;height:48px;border:none;border-radius:16px;background:#0f1b31;color:#e5efff}.file-chip{display:inline-flex;padding:10px 12px;border-radius:12px;background:#0b1830;color:#d7e8ff}
.narrow{max-width:620px;margin:0 auto}.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.table-wrap{width:100%;border-collapse:collapse}.table-wrap th,.table-wrap td{padding:10px;border-bottom:1px solid rgba(148,163,184,.12);text-align:left}.checkbox-line{display:flex;gap:8px;align-items:center}.empty-card{padding:32px;text-align:center;color:#91a5c1}
@media (max-width: 980px){.chat-shell{grid-template-columns:1fr}.chat-side{order:2}.chat-main{order:1;min-height:70vh}}
@media (max-width: 720px){.topbar{padding:12px 14px;align-items:flex-start;gap:12px;flex-direction:column}.page-wrap{padding:14px}.hero-card h1{font-size:28px}.search-card{grid-template-columns:1fr}.room-grid{grid-template-columns:1fr}.bubble{max-width:86vw}.chat-box{padding:14px}.chat-composer{grid-template-columns:auto 1fr auto;padding:8px}.chat-composer textarea{min-height:44px}.primary-btn,.ghost-btn,.danger-btn{min-height:48px;padding:11px 14px}}

.install-card{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:18px 20px;margin:16px 0 6px;background:linear-gradient(135deg,rgba(29,78,216,.14),rgba(20,184,166,.10));border:1px solid rgba(96,165,250,.18);border-radius:22px}.install-card h2{margin:0 0 6px;font-size:20px}.install-card p{margin:0;color:#a7bbd8}.install-actions{display:flex;gap:10px;flex-wrap:wrap}@media (max-width:720px){.install-card{flex-direction:column;align-items:flex-start}}