:root{--accent: #1f6f8b;--accent-strong: #143d35;--button: #c84c31;--button-text: #ffffff;--danger-bg: #fff1ed;--danger-border: #efb4a6;--danger-text: #7f2918;--field-bg: #fbfcfb;--focus-ring: rgba(31, 111, 139, .14);--muted: #66736f;--panel: #ffffff;--panel-soft: rgba(255, 255, 255, .82);--panel-glass: rgba(255, 255, 255, .68);--pill-bg: #edf8f2;--pill-border: #9fc9b6;--selected: #eef7f9;--surface: #f5f7f4;--surface-wash: rgba(31, 111, 139, .12);--text: #16211f;--text-soft: #24302d;--label: #394743;--line: #d9e1dc;--line-soft: #dce4df;--input-line: #cfd8d3;color:var(--text);background:var(--surface);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}[data-theme=dark]{color-scheme:dark;--accent: #6ab7d3;--accent-strong: #7ad7bd;--button: #e06b4f;--button-text: #101715;--danger-bg: #371c18;--danger-border: #8f4435;--danger-text: #ffd1c8;--field-bg: #18221f;--focus-ring: rgba(106, 183, 211, .2);--muted: #a3b1ac;--panel: #121b18;--panel-soft: rgba(18, 27, 24, .88);--panel-glass: rgba(18, 27, 24, .76);--pill-bg: #17352e;--pill-border: #397a6b;--selected: #17313a;--surface: #0b1110;--surface-wash: rgba(106, 183, 211, .13);--text: #edf4f1;--text-soft: #d5dfdb;--label: #c1cfca;--line: #273430;--line-soft: #2e3d38;--input-line: #40504b}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}.appShell{min-height:100vh;display:grid;grid-template-columns:minmax(280px,340px) 1fr;background:linear-gradient(120deg,var(--surface-wash),transparent 34%),var(--surface)}.sidebar{min-height:100vh;border-right:1px solid var(--line);background:var(--panel-soft);padding:24px;display:flex;flex-direction:column;gap:22px}.brand{display:flex;align-items:center;gap:14px}.brandMark,.messageAvatar{display:grid;place-items:center;flex:0 0 auto}.brandMark{width:48px;height:48px;border-radius:8px;color:#fff;background:var(--accent-strong)}.brand 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14px;line-height:1.45;resize:vertical}input:focus,select:focus,textarea:focus{border-color:#1f6f8b;border-color:var(--accent);box-shadow:0 0 0 3px var(--focus-ring)}button{border:0;font:inherit}.primaryButton,.sendButton,.sessionButton{cursor:pointer}.primaryButton{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:8px;color:var(--button-text);background:var(--button);font-weight:800}.primaryButton:disabled,.sendButton:disabled{cursor:not-allowed;opacity:.58}.sessionListHeader{color:var(--label);font-size:.88rem;font-weight:800}.sessionList{display:grid;gap:10px;overflow:auto;padding-right:4px}.sessionButton{width:100%;min-height:72px;display:grid;gap:5px;padding:13px;border:1px solid var(--line-soft);border-radius:8px;text-align:left;color:var(--text-soft);background:var(--panel)}.sessionButton.active{border-color:var(--accent);background:var(--selected)}.sessionButton span,.muted,.emptyState p{color:var(--muted)}.sessionButton span{overflow:hidden;font-size:.84rem;text-overflow:ellipsis;white-space:nowrap}.workspace{min-width:0;min-height:100vh;display:grid;grid-template-rows:auto auto 1fr auto auto}.chatHeader{min-height:96px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:24px 32px;border-bottom:1px solid var(--line);background:var(--panel-glass)}.chatHeader h2{font-size:clamp(1.25rem,2vw,2rem)}.statusPill{min-width:86px;border:1px solid var(--pill-border);border-radius:999px;padding:7px 12px;color:var(--accent-strong);background:var(--pill-bg);font-size:.86rem;font-weight:800;text-align:center}.errorBanner{margin:16px 32px 0;border:1px solid var(--danger-border);border-radius:8px;padding:12px 14px;color:var(--danger-text);background:var(--danger-bg)}.transcript{min-height:0;overflow:auto;padding:28px 32px;display:flex;flex-direction:column;gap:16px}.emptyState{min-height:100%;display:grid;place-items:center;align-content:center;gap:12px;text-align:center}.emptyState svg{color:var(--accent)}.emptyState h3{max-width:480px;font-size:1.24rem}.emptyState p{max-width:520px;margin:0;line-height:1.55}.message{width:min(760px,100%);display:flex;gap:12px;align-items:flex-start}.message.user{align-self:flex-end;flex-direction:row-reverse}.messageAvatar{width:34px;height:34px;border-radius:8px;color:#fff;background:var(--accent-strong)}.message.user .messageAvatar{background:var(--accent)}.message p{margin:0;border:1px solid var(--line-soft);border-radius:8px;padding:13px 15px;background:var(--panel);line-height:1.55;white-space:pre-wrap}.message.user p{color:#fff;border-color:var(--accent);background:var(--accent)}.message.pending p{color:var(--muted)}.composer{position:relative;margin:0 32px 28px}.quickActions{align-self:start;display:flex;flex-wrap:wrap;align-items:flex-start;align-content:flex-start;gap:10px;min-height:52px;max-height:96px;overflow:auto;padding:0 32px 14px}.quickActions button{flex:0 0 auto;height:38px;max-height:38px;display:inline-flex;align-items:center;gap:8px;border:1px solid var(--input-line);border-radius:8px;padding:0 12px;color:var(--text-soft);background:var(--panel);cursor:pointer;font-weight:750}.quickActions button:disabled{cursor:not-allowed;opacity:.52}.sendButton{position:absolute;right:10px;bottom:10px;width:40px;height:40px;display:grid;place-items:center;border-radius:8px;color:#fff;background:var(--accent-strong)}.spin{animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:860px){.appShell{grid-template-columns:1fr}.sidebar{min-height:auto;border-right:0;border-bottom:1px solid var(--line)}.workspace{min-height:68vh}.chatHeader,.transcript,.quickActions{padding-left:20px;padding-right:20px}.composer,.errorBanner{margin-left:20px;margin-right:20px}}@media(max-width:560px){.chatHeader{align-items:flex-start;flex-direction:column}.statusPill{min-width:0}}