:root{color-scheme:light;--bg: #e7f3ff;--bg-2: #d9ecff;--ink: #0f172a;--muted: #4b6b8a;--accent: #2a87e6;--accent-2: #1b5fa8;--card: #f9fcff;--stroke: rgba(0, 0, 0, .08);--shadow: 0 20px 60px rgba(0, 0, 0, .12);--radius: 20px}*{box-sizing:border-box}body{margin:0;font-family:Helvetica Neue,Segoe UI,Arial,sans-serif;background:radial-gradient(circle at top left,#ffffff,var(--bg)),linear-gradient(120deg,rgba(42,135,230,.15),transparent 45%),var(--bg-2);color:var(--ink);min-height:100vh}.page{min-height:100vh;display:flex;align-items:stretch;animation:liftIn .7s ease both;overflow:hidden}@keyframes liftIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.login-page{justify-content:center;align-items:center}.login-card{background:var(--card);padding:48px;border-radius:var(--radius);box-shadow:var(--shadow);max-width:420px;width:100%}.login-header{font-size:40px;margin-bottom:12px}.login-subtitle{margin:0 0 24px;color:var(--muted)}.input{width:100%;padding:12px 16px;border-radius:12px;border:1px solid var(--stroke);background:#fff;font-size:16px;margin-bottom:12px}.primary{width:100%;padding:12px 16px;border-radius:999px;border:none;background:var(--accent);color:#fff;font-weight:600;letter-spacing:.4px;cursor:pointer;transition:transform .12s ease,box-shadow .12s ease}.primary.small{width:auto;padding:10px 18px;font-size:14px}.primary:hover{transform:translateY(-1px);box-shadow:0 8px 20px #d96b2b40}.status{margin-top:12px;color:var(--muted)}.app{display:grid;grid-template-columns:300px 1fr;height:100vh}.sidebar{padding:32px 24px;background:#fff9;border-right:1px solid var(--stroke);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;flex-direction:column;overflow:hidden}.sidebar-close{display:none;border:none;background:transparent;font-size:24px;cursor:pointer;margin-left:auto}.sidebar-top{position:sticky;top:0;z-index:3;background:transparent;padding-bottom:16px}.sidebar-scroll{overflow-y:auto;padding-right:6px}.brand-title{font-size:28px}.brand-subtitle{color:var(--muted);margin-top:6px}.nav{display:flex;gap:8px;margin-top:24px}.nav-btn{flex:1;border:none;padding:10px 12px;border-radius:999px;background:transparent;cursor:pointer;font-weight:600;color:var(--muted);border:1px solid transparent}.nav-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}.sidebar-section{margin-top:28px}.section-title{text-transform:uppercase;letter-spacing:1px;font-size:12px;color:var(--muted);margin-bottom:12px}.parts{display:flex;flex-direction:column;gap:8px}.part-btn{text-align:left;padding:10px 14px;border-radius:12px;border:1px solid transparent;background:#fffc;cursor:pointer;font-weight:600;color:var(--ink);animation:popIn .4s ease both;animation-delay:var(--delay, 0ms)}.part-btn.active{border-color:var(--accent);box-shadow:0 8px 20px #00000014}@keyframes popIn{0%{opacity:0;transform:translate(-8px)}to{opacity:1;transform:translate(0)}}.content{padding:32px 40px;display:flex;flex-direction:column;height:100vh;overflow:hidden}.content-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;position:sticky;top:0;z-index:5;background:transparent;padding:12px 0}.header-left{display:flex;align-items:center;gap:12px}.mobile-toggle{display:none;border:1px solid var(--stroke);background:#fff;padding:6px 10px;border-radius:10px;cursor:pointer;font-size:18px}.content-title{font-size:24px}.content-subtitle{color:var(--muted);margin-top:6px}.ghost{border:1px solid var(--stroke);background:transparent;padding:8px 16px;border-radius:999px;cursor:pointer}.panel{background:#ffffffd9;border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);flex:1 1 auto;overflow:auto}.iframe-panel{padding:0;overflow:hidden}.chat-frame{width:100%;height:100%;border:none;background:#fff}.messages{display:flex;flex-direction:column;gap:16px}.message{padding:16px;border-radius:16px;background:#fff;border:1px solid var(--stroke)}.message.service{background:transparent;border:none;display:flex;justify-content:center}.service-pill{background:var(--accent-2);color:#fff;padding:6px 14px;border-radius:999px;font-size:14px}.message-meta{display:flex;justify-content:space-between;font-size:14px;color:var(--muted);margin-bottom:8px}.message-from{font-weight:600;color:var(--ink)}.message-text{white-space:pre-wrap;line-height:1.5}.media-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:12px}.media-thumb{width:160px;max-width:100%;border-radius:12px;border:1px solid var(--stroke)}.audio{width:240px}.file-link{display:inline-flex;align-items:center;padding:8px 12px;border-radius:999px;border:1px dashed var(--stroke);color:var(--muted);text-decoration:none}.search{display:flex;gap:12px;margin-bottom:24px}.search .input{margin-bottom:0;height:44px}.search .primary.small{height:44px}.results{display:grid;gap:16px}.result-card{border-radius:16px;padding:16px;background:#fff;border:1px solid var(--stroke);text-align:left;cursor:pointer;transition:transform .12s ease,box-shadow .12s ease}.result-card.clickable:hover{transform:translateY(-2px);box-shadow:0 12px 30px #0000001f}.result-header{display:flex;justify-content:space-between;color:var(--muted);font-size:14px;margin-bottom:6px}.result-from{font-weight:600;margin-bottom:6px}.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.tab{padding:8px 14px;border-radius:999px;border:1px solid var(--stroke);background:transparent;cursor:pointer}.tab.active{background:var(--accent);border-color:var(--accent);color:#fff}.media-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}.media-card{border-radius:16px;border:1px solid var(--stroke);background:#fff;padding:12px;display:flex;flex-direction:column;gap:10px;align-items:center;justify-content:center}.media-link{cursor:pointer;text-align:left}.media-card img,.media-card video{width:100%;border-radius:12px;object-fit:contain;max-height:220px}.file-card{align-items:center;text-align:center}.file-name{width:100%;font-size:12px;color:var(--muted);word-break:break-word}.media-jump{border:1px solid var(--stroke);background:transparent;padding:6px 12px;border-radius:999px;cursor:pointer;font-size:12px;color:var(--muted)}.file-icon{font-size:12px;letter-spacing:1px;color:var(--accent-2);border:1px dashed var(--accent-2);border-radius:999px;padding:6px 12px}.empty{color:var(--muted)}@media (max-width: 900px){.app{grid-template-columns:1fr}.sidebar{position:fixed;top:0;left:0;height:100vh;width:260px;border-right:1px solid var(--stroke);transform:translate(-110%);transition:transform .2s ease;z-index:10}.sidebar.open{transform:translate(0)}.sidebar-close{display:block}.mobile-toggle{display:inline-flex}.content{padding:24px}.chat-frame{height:calc(100vh - 160px)}.nav{flex-wrap:wrap}}