:root{color-scheme:light;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;--container-padding: clamp(16px, 4vw, 32px);--card-padding: clamp(16px, 4vw, 24px);--color-text-subtle: #64748b;--sidebar-padding: clamp(14px, 3vw, 20px);--sidebar-action-bg: transparent;--sidebar-action-color: #1f2937;--sidebar-action-border: rgba(148, 163, 184, .4);--sidebar-action-hover-bg: rgba(37, 99, 235, .08);--sidebar-action-hover-border: rgba(37, 99, 235, .4);--sidebar-action-hover-color: #1d4ed8;--sidebar-action-disabled-opacity: .6;--sidebar-title-color: #111827;--sidebar-divider-color: rgba(148, 163, 184, .24);--sidebar-footer-border: rgba(148, 163, 184, .22);--conversation-item-hover-bg: rgba(15, 23, 42, .06);--conversation-item-hover-border: rgba(148, 163, 184, .3);--conversation-item-active-border: rgba(37, 99, 235, .45);--conversation-item-active-bg: rgba(37, 99, 235, .12);--conversation-item-active-color: #1d4ed8;--conversation-item-text: 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ease}html[data-theme=dark] a:hover{color:#93c5fd}html[data-theme=dark] ::-webkit-scrollbar{width:10px;height:10px}html[data-theme=dark] ::-webkit-scrollbar-track{background:transparent}html[data-theme=dark] ::-webkit-scrollbar-thumb{background:#ffffff1f;border-radius:999px;border:2px solid transparent}html[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:#ffffff38}html[data-theme=dark] .app-shell{min-height:100vh;display:flex;flex-direction:column;align-items:stretch;background:transparent;color:var(--color-text)}html[data-theme=dark] .app-shell.is-authenticated{height:100vh;overflow:hidden}.app-header,html[data-theme=dark] .app-main{width:100%;max-width:none;padding-left:var(--container-padding);padding-right:var(--container-padding)}html[data-theme=dark] .app-header{margin:0 auto;padding-top:clamp(18px,3vw,28px);padding-bottom:clamp(14px,2.4vw,22px);background:#0d0e12b8;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);border-bottom:1px solid 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1fr;gap:clamp(20px,3vw,36px);min-height:0;align-items:stretch;grid-template-rows:1fr;height:100%;overflow:hidden}html[data-theme=dark] .conversation-sidebar{display:flex;flex-direction:column;gap:18px;padding:clamp(12px,3vw,18px) 0;min-height:0;border-right:1px solid rgba(255,255,255,.08);background:linear-gradient(135deg,#0f1016e6,#151720d1 45%,#161821b8);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}html[data-theme=dark] .sidebar-brand{padding:0 var(--sidebar-padding);display:flex;flex-direction:column;gap:16px}html[data-theme=dark] .conversation-nav{display:flex;flex-direction:column;gap:12px;flex:1;min-height:0;padding:0 var(--sidebar-padding)}html[data-theme=dark] .conversation-nav h2{margin:0 0 4px;font-size:.75rem;text-transform:uppercase;letter-spacing:.18em;color:var(--color-text-subtle);font-weight:600}html[data-theme=dark] .conversation-list{flex:1;display:flex;flex-direction:column;gap:6px;overflow-y:auto;padding:0 0 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