:root{color-scheme:light;--bg: #f4f6fb;--surface: #ffffff;--surface-muted: #eef2f8;--border: #d8e0ec;--text: #152033;--text-muted: #5b677a;--primary: #2563eb;--primary-hover: #1d4ed8;--primary-soft: #dbeafe;--success: #059669;--success-soft: #d1fae5;--error: #dc2626;--error-soft: #fee2e2;--shadow: 0 10px 30px rgba(21, 32, 51, .08);--radius: 14px;--radius-sm: 10px;--font: "Inter", system-ui, -apple-system, sans-serif}*,*:before,*:after{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;font-family:var(--font);color:var(--text);background:radial-gradient(circle at top left,rgba(37,99,235,.08),transparent 28%),radial-gradient(circle at top right,rgba(5,150,105,.06),transparent 24%),var(--bg)}button,input,textarea,select{font:inherit}button{cursor:pointer}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.app-shell{min-height:100vh;display:flex;flex-direction:column}.app-shell--login{align-items:center;justify-content:center;padding:24px}.app-header{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center;padding:18px 24px;background:#ffffffe0;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.app-header__brand{display:flex;align-items:center;gap:12px}.app-header__logo{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),#1e40af);color:#fff;font-weight:700}.app-header__title{margin:0;font-size:1.05rem;font-weight:700}.app-header__subtitle{margin:2px 0 0;color:var(--text-muted);font-size:.85rem}.app-header__nav{display:flex;gap:8px;justify-self:center}.app-header__user{display:flex;align-items:center;gap:12px;justify-self:end}.nav-tab{border:1px solid transparent;background:transparent;color:var(--text-muted);padding:10px 14px;border-radius:999px;font-weight:600}.nav-tab--active{background:var(--primary-soft);color:var(--primary);border-color:#2563eb26}.user-chip{display:flex;flex-direction:column;align-items:flex-end;gap:2px}.user-chip__name{font-weight:600}.user-chip__role{color:var(--text-muted);font-size:.82rem}.app-status-bar{display:flex;align-items:center;gap:8px;padding:8px 24px;font-size:.88rem;color:var(--text-muted);border-bottom:1px solid var(--border);background:#ffffffa6}.app-main{flex:1;padding:24px}.status-dot{width:10px;height:10px;border-radius:50%;background:#94a3b8;flex-shrink:0}.status-dot--ok{background:var(--success)}.status-dot--error{background:var(--error)}.status-dot--pending{background:#f59e0b}.btn{border:1px solid transparent;border-radius:10px;padding:10px 16px;font-weight:600;transition:background .15s ease,border-color .15s ease,color .15s ease}.btn:disabled{opacity:.55;cursor:not-allowed}.btn--primary{background:var(--primary);color:#fff}.btn--primary:hover:not(:disabled){background:var(--primary-hover)}.btn--secondary{background:var(--surface);border-color:var(--border);color:var(--text)}.btn--secondary:hover:not(:disabled){background:var(--surface-muted)}.btn--ghost{background:transparent;border-color:var(--border);color:var(--text-muted)}.btn--ghost:hover:not(:disabled){background:var(--surface-muted);color:var(--text)}.login-page{width:min(100%,560px)}.login-card{background:var(--surface);border:1px solid var(--border);border-radius:calc(var(--radius) + 4px);box-shadow:var(--shadow);padding:32px}.login-card__hero h1{margin:12px 0 8px;font-size:2rem}.login-card__badge{display:inline-block;padding:4px 10px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:.75rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}.login-card__lead{margin:0;color:var(--text-muted);line-height:1.6}.login-card__status{display:flex;align-items:center;gap:8px;margin-top:20px;padding:12px 14px;border-radius:var(--radius-sm);background:var(--surface-muted);color:var(--text-muted);font-size:.92rem}.login-card__label{margin:24px 0 12px;font-weight:600}.user-grid{display:grid;gap:12px}.user-card{display:flex;align-items:center;gap:14px;width:100%;padding:16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);text-align:left}.user-card:hover{border-color:#2563eb59;background:#f8fbff}.user-card__avatar{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary);font-weight:700;font-size:1.1rem}.user-card__meta{display:flex;flex-direction:column;gap:2px}.user-card__meta strong{font-size:1rem}.user-card__meta span{color:var(--text-muted);font-size:.88rem}.user-card__meta small{color:var(--text-muted);font-size:.8rem;line-height:1.4}.login-card__footnote{margin:20px 0 0;color:var(--text-muted);font-size:.82rem;line-height:1.5}.chat-workspace{display:grid;grid-template-columns:280px 1fr;gap:20px;min-height:calc(100vh - 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