:root{--color-paper: #f6f5f2;--color-panel: #edebe5;--color-panel2: #e3dfd4;--color-card: #ffffff;--color-user: #e6e2d6;--color-ink: #141416;--color-ink2: #3a3a3e;--color-muted: #7a7a7e;--color-faint: #b0ada4;--color-red: #c8102e;--color-ok-fg: #1f7a3f;--color-warn-fg:#a85f00;--color-err-fg: #b0202a;--color-ok-bg: #e5f2e9;--color-warn-bg:#f6ecd8;--color-err-bg: #f8e5e6;--color-soft-bg:#e8e4d6;--color-rule: #d6d2c8;--color-rule-soft: #e3dfd4;--font-ui: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", "Consolas", monospace;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--radius-xl: 10px;--radius-2xl: 12px;--radius-3xl: 14px;--radius-pill: 999px;--shadow-input: 0 1px 2px rgba(0, 0, 0, .04);--shadow-popover: 0 20px 40px rgba(0, 0, 0, .18);--shadow-drawer: -8px 0 24px rgba(0, 0, 0, .18);--shadow-focus: 0 0 0 3px rgba(200, 16, 46, .18);color-scheme:light;font-family:var(--font-ui);color:var(--color-ink);background:var(--color-paper)}[data-theme=dark]{--color-paper: #111113;--color-panel: #1a1a1d;--color-panel2: #222226;--color-card: #202024;--color-user: #2a2a30;--color-ink: #f4f2ec;--color-ink2: #c8c5bd;--color-muted: #8a8a90;--color-faint: #4a4a50;--color-red: #e8324a;--color-ok-fg: #4ec07a;--color-warn-fg:#d19a3a;--color-err-fg: #e85060;--color-ok-bg: #1c2a22;--color-warn-bg:#2a2418;--color-err-bg: #2a1a1d;--color-soft-bg:#26262c;--color-rule: #2b2b30;--color-rule-soft: #1f1f24;--shadow-input: 0 1px 2px rgba(0, 0, 0, .25);color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--color-paper);color:var(--color-ink);font-family:var(--font-ui);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.brand-mark{display:inline-flex;align-items:center;justify-content:center;position:relative;background:#000;color:#fff;font-family:var(--font-ui);font-weight:900;letter-spacing:-.5px;line-height:1;flex-shrink:0;-webkit-user-select:none;user-select:none}.brand-mark__bar{position:absolute;background:var(--color-red);border-radius:1px;pointer-events:none}.brand-mark--small{width:30px;height:30px;font-size:16px;border-radius:6px}.brand-mark--small .brand-mark__bar{left:8px;right:8px;height:2px;bottom:6px}.brand-mark--medium{width:36px;height:36px;font-size:20px;border-radius:7px}.brand-mark--medium .brand-mark__bar{left:9px;right:9px;height:2.5px;bottom:7px}.brand-mark--large{width:72px;height:72px;font-size:40px;border-radius:14px}.brand-mark--large .brand-mark__bar{left:18px;right:18px;height:4px;bottom:14px}.wordmark{font-family:var(--font-ui);font-weight:700;letter-spacing:-.15px;color:var(--color-ink);line-height:1}.wordmark__red{color:var(--color-red)}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;border-radius:var(--radius-md);border:1px solid var(--color-rule);background:var(--color-card);color:var(--color-ink);cursor:pointer;transition:background .12s ease,border-color .12s ease}.theme-toggle:hover{background:var(--color-panel2)}.theme-toggle:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.theme-toggle svg{width:16px;height:16px;display:block}.auth-gate{display:flex;flex-direction:column;gap:var(--space-2);align-items:center;justify-content:center;height:100vh;padding:var(--space-8);text-align:center;background:var(--color-paper);color:var(--color-ink)}.auth-gate--error h2{color:var(--color-err-fg);margin:0}:root{--width-sidebar-full: 244px;--width-strip: 56px;--width-rail-full: 320px;--width-rail-compact: 300px;--width-popover: 280px;--width-drawer: 340px;--bp-full: 1280px;--bp-compact: 1024px}.shell{display:grid;grid-template-columns:var(--width-sidebar-full) 1fr var(--width-rail-full);grid-template-rows:100vh;grid-auto-rows:0;width:100vw;background:var(--color-paper);color:var(--color-ink);overflow:hidden;position:relative}.shell--compact{grid-template-columns:var(--width-strip) 1fr var(--width-rail-compact)}.shell--narrow{grid-template-columns:var(--width-strip) 1fr}.sidebar{display:flex;flex-direction:column;background:var(--color-panel);border-right:1px solid var(--color-rule);min-height:0}.sidebar__brand{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-4) var(--space-4) var(--space-3);border-bottom:1px solid var(--color-rule-soft)}.sidebar__actions{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-3) var(--space-3)}.sidebar__new-chat{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);border:1px solid transparent;background:var(--color-red);color:#fff;font:inherit;font-size:13px;font-weight:500;cursor:pointer;transition:opacity .12s ease}.sidebar__new-chat:hover:not(:disabled){opacity:.92}.sidebar__new-chat:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.sidebar__new-chat:disabled{opacity:.5;cursor:not-allowed}.sidebar__new-chat svg{width:14px;height:14px}.sidebar__shortcut{margin-left:auto;font-family:var(--font-mono);font-size:10px;font-weight:500;letter-spacing:.04em;color:#ffffffbf}.sidebar__search{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);background:var(--color-panel2);color:var(--color-muted)}.sidebar__search svg{width:14px;height:14px;flex-shrink:0}.sidebar__search 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ease}.icon-strip__btn:hover:not(:disabled){background:var(--color-card);border-color:var(--color-rule)}.icon-strip__btn:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.icon-strip__btn:disabled{opacity:.45;cursor:not-allowed}.icon-strip__btn--active{background:var(--color-card);border-color:var(--color-rule)}.icon-strip__btn svg{width:16px;height:16px}.icon-strip__spacer{flex:1}.icon-strip__avatar{width:28px;height:28px;border-radius:var(--radius-pill);background:var(--color-soft-bg);color:var(--color-ink);font-family:var(--font-mono);font-size:11px;font-weight:500;display:inline-flex;align-items:center;justify-content:center;border:none;cursor:pointer}.icon-strip__avatar:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.sessions-popover__backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0000002e;z-index:40}.sessions-popover{position:absolute;left:58px;top:70px;width:var(--width-popover);max-height:70vh;background:var(--color-panel);border:1px solid 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svg{width:14px;height:14px}.sources-drawer__close:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.sources-drawer__body{flex:1;min-height:0;display:flex;padding-top:var(--space-3)}.empty-state{display:flex;align-items:center;justify-content:center;min-height:100%}.empty-state__inner{display:flex;flex-direction:column;align-items:center;gap:var(--space-6);max-width:640px;width:100%;text-align:center;padding:var(--space-8) var(--space-4)}.empty-state__headline{margin:0;font-size:28px;font-weight:700;letter-spacing:-.4px;line-height:1.15;color:var(--color-ink)}.empty-state__subhead{margin:0;font-size:14px;line-height:1.55;color:var(--color-ink2)}.empty-state__grid{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:10px}.shell--narrow .empty-state__grid{grid-template-columns:1fr}.starter-card{display:flex;flex-direction:column;gap:var(--space-2);padding:14px;border-radius:var(--radius-lg);border:1px solid 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var(--space-1)}.fragment-list__row{display:block;width:100%;text-align:left;padding:var(--space-2) var(--space-4);border:none;background:transparent;color:var(--color-ink);cursor:pointer;border-left:3px solid transparent}.fragment-list__row:hover{background:var(--color-panel2)}.fragment-list__row:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.fragment-list__row.is-active{background:var(--color-card);border-left-color:var(--color-red)}.fragment-list__name-row{display:flex;align-items:center;gap:var(--space-2);min-width:0}.fragment-list__name{font-size:13px;font-weight:500;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.fragment-badge{flex-shrink:0;font-family:var(--font-mono);font-size:10px;font-weight:500;text-transform:lowercase;letter-spacing:.04em;padding:1px 6px;border-radius:var(--radius-pill);border:1px solid 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ease}.fragment-editor__save:hover:not(:disabled){opacity:.9}.fragment-editor__save:focus-visible{outline:none;box-shadow:var(--shadow-focus)}.fragment-editor__save:disabled{background:var(--color-faint);color:#ffffffd9;cursor:not-allowed}.fragment-editor__textarea{flex:1;min-height:30vh;resize:vertical;padding:var(--space-3);border-radius:var(--radius-md);border:1px solid 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