.rail-btn{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-1) var(--space-2);border-radius:var(--radius);font-size:var(--type-body);font-weight:var(--fw-medium);color:var(--text-2);cursor:pointer;user-select:none;background:transparent;border:none;font-family:inherit;text-align:left;text-decoration:none;width:100%;transition:background var(--dur-hover) var(--ease), color var(--dur-hover) var(--ease);white-space:nowrap;min-height:36px;}.rail-btn svg{width:18px;height:18px;flex-shrink:0;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;color:var(--text-3);transition:color var(--dur-card) var(--ease), stroke-width var(--dur-card) var(--ease);}@media (hover: hover){.rail:hover .rail-btn svg{color:var(--text-3);stroke-width:1}}.rail-btn .lbl{opacity:0;transform:translateX(-6px);transition:opacity 180ms var(--ease) 80ms, transform 200ms var(--ease) 80ms}.rail[data-expanded="true"] .rail-btn .lbl{opacity:1;transform:translateX(0)}@media (hover: hover){.rail:hover .rail-btn .lbl{opacity:1;transform:translateX(0)}}.rail-btn:hover{background:color-mix(in srgb, var(--ink) 4%, transparent);color:var(--text)}.rail-btn:focus{outline:2px solid color-mix(in srgb, var(--brand) 55%, transparent);outline-offset:1px}.rail[data-expanded="true"] .rail-btn:hover svg{color:var(--reference);stroke-width:1.25}@media (hover: hover){.rail:hover .rail-btn:hover svg{color:var(--reference);stroke-width:1.25}}.rail-btn.active{background:color-mix(in srgb, var(--ink) 6%, transparent);color:var(--text)}.rail-btn.active svg{color:var(--brand);stroke-width:1.5}@media (hover: hover){.rail:hover .rail-btn.active svg{color:var(--brand);stroke-width:1.5}}.rail-btn.rx-glyph svg{fill:currentColor;stroke:none}.rail-btn .kbd{margin-left:auto;font-size: var(--type-caption);font-weight:600;color:var(--text-4);padding:var(--space-0-5) var(--space-1-5);border-radius:var(--radius-sm);background:color-mix(in srgb, var(--ink) 4%, transparent);opacity:0;transition:opacity 180ms var(--ease) 120ms;letter-spacing:.02em;}.rail[data-expanded="true"] .rail-btn .kbd{opacity:1}@media (hover: hover){.rail:hover .rail-btn .kbd{opacity:1}}.rail-history{display:flex;flex-direction:column;gap:1px;overflow:hidden;padding:0;}.rail-history-row{display:block}.rail-history > .rail-chat, .rail-history > .rail-chat-sep, .rail-history > .rail-chats-more{flex-shrink:0}.rail-search-btn:focus-within, .rail[data-rail-search-active="true"] .rail-search-btn{background:color-mix(in srgb, var(--ink) 5%, transparent);outline:2px solid color-mix(in srgb, var(--brand) 40%, transparent);outline-offset:0;}.rail-search-btn .lbl{overflow:hidden;}.rail-search-input{flex:0 1 0;min-width:0;width:0;border:none;background:transparent;font-family:inherit;font-size:var(--type-body-sm);color:var(--text);padding:0;outline:none;opacity:0;transform:translateX(-6px);pointer-events:none;transition:opacity 180ms var(--ease) 80ms, transform 200ms var(--ease) 80ms;}.rail-search-btn:focus-within .lbl, .rail[data-rail-search-active="true"] .rail-search-btn .lbl{width:0;opacity:0;transform:translateX(-6px);}.rail-search-btn:focus-within .rail-search-input, .rail[data-rail-search-active="true"] .rail-search-input{flex:1 1 auto;width:auto;opacity:1;transform:translateX(0);pointer-events:auto;}.rail-search-input::placeholder{color:var(--text-3)}.rail-search-input::-webkit-search-cancel-button{appearance:none;display:none}.rail-chat{padding:var(--space-1) var(--space-2);border-radius:var(--radius);font-size:var(--type-body);font-weight:var(--fw-medium);color:var(--text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;cursor:pointer;opacity:0;transform:translateX(-4px);transition:opacity 200ms var(--ease), transform 200ms var(--ease), background 140ms var(--ease), color 140ms var(--ease);}.rail[data-expanded="true"] .rail-chat{opacity:1;transform:translateX(0)}@media (hover: hover){.rail:hover .rail-chat{opacity:1;transform:translateX(0)}}.rail-chat:hover{background:color-mix(in srgb, var(--ink) 4%, transparent);color:var(--text)}.rail-chat.active{background:color-mix(in srgb, var(--brand) 10%, transparent);color:var(--brand-deep)}.rail-chat[data-filtered="true"]{display:none}.rail-history-error{opacity:0;transform:translateX(-4px);pointer-events:none;transition:opacity 200ms var(--ease), transform 200ms var(--ease)}.rail[data-expanded="true"] .rail-history-error{opacity:1;transform:translateX(0);pointer-events:auto}@media (hover: hover){.rail:hover .rail-history-error{opacity:1;transform:translateX(0);pointer-events:auto}}.rail-chat-sep{padding:var(--space-3) var(--space-2) var(--space-1);font-size:var(--type-caption);font-weight:var(--fw-bold);letter-spacing:var(--tracking-eyebrow-sm);text-transform:uppercase;color:var(--text-4);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;opacity:0;transform:translateX(-4px);transition:opacity 200ms var(--ease), transform 200ms var(--ease);}.rail[data-expanded="true"] .rail-chat-sep{opacity:1;transform:translateX(0)}@media (hover: hover){.rail:hover .rail-chat-sep{opacity:1;transform:translateX(0)}}.rail-history[data-collapsed="true"] .rail-chat-sep{display:none}.rail-history[data-searching="true"] .rail-chat-sep{display:none}.rail-history[data-collapsed="true"] .rail-chat:nth-of-type(n+4){display:none}.rail-chats-more{margin-top:var(--space-2);padding:var(--space-1) var(--space-2);border-radius:var(--radius);background:transparent;border:none;cursor:pointer;font-family:inherit;font-size:var(--type-body-sm);font-weight:var(--fw-medium);color:var(--text-3);text-align:left;opacity:0;transform:translateX(-4px);transition:opacity 200ms var(--ease), transform 200ms var(--ease), color 140ms var(--ease);}.rail[data-expanded="true"] .rail-chats-more{opacity:1;transform:translateX(0)}@media (hover: hover){.rail:hover .rail-chats-more{opacity:1;transform:translateX(0)}}.rail-chats-more:hover{color:var(--text)}.rail-history[data-searching="true"] .rail-chats-more{display:none}.rail-chats-more .lbl-expanded{display:none}.rail-history[data-collapsed="false"] .rail-chats-more .lbl-collapsed{display:none}.rail-history[data-collapsed="false"] .rail-chats-more .lbl-expanded{display:inline}.rail-history[data-collapsed="false"]{max-height:50vh;overflow-y:auto;overflow-x:hidden;scrollbar-width:thin;scrollbar-color:var(--ink-wash-12) transparent;}.rail-history[data-collapsed="false"]:hover{scrollbar-color:var(--ink-wash-22) transparent}@media (hover: hover){.rail:hover .rail-chat:nth-of-type(1){transition-delay:120ms, 120ms, 0ms, 0ms}}@media (hover: hover){.rail:hover .rail-chat:nth-of-type(2){transition-delay:150ms, 150ms, 0ms, 0ms}}@media (hover: hover){.rail:hover .rail-chat:nth-of-type(3){transition-delay:180ms, 180ms, 0ms, 0ms}}.rail-user{display:flex;align-items:center;gap:var(--space-2-5);padding:var(--space-2) var(--space-1-5);border-top:1px solid transparent;margin-top:var(--space-1-5);transition:border-color 260ms var(--ease);cursor:pointer;border-radius:var(--radius-lg);position:relative;}@media (hover: hover){.rail:hover .rail-user{border-color:transparent}}.rail-user:hover{background:color-mix(in srgb, var(--ink) 4%, transparent)}.rail-user.is-open{background:color-mix(in srgb, var(--ink) 4%, transparent)}.rail-user .av{width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,#3A8D3F,#1E5C23);color:var(--text-inverse);font-size: var(--type-body-sm);font-weight:650;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);letter-spacing:.01em;}.rail-user > .who{display:flex;flex-direction:column;gap:1px;min-width:0;opacity:0;transform:translateX(-4px);transition:opacity 180ms var(--ease) 160ms, transform 200ms var(--ease) 160ms;}.rail[data-expanded="true"] .rail-user > .who{opacity:1;transform:translateX(0)}@media (hover: hover){.rail:hover .rail-user > .who{opacity:1;transform:translateX(0)}}.rail-user .n{font-size: var(--type-body);font-weight:600;color:var(--ink);letter-spacing:-.005em;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.rail-user .r{font-size: var(--type-micro);color:var(--text-3);font-weight:500;line-height:1.2}.rail-user-pop{position:absolute;left:calc(100% + 8px);bottom:0;min-width:220px;max-width:224px;background:var(--paper);border:1px solid var(--line-2);border-radius:var(--radius-xl);box-shadow:0 12px 40px -12px var(--ink-wash-22), 0 2px 6px -2px var(--ink-wash-8);padding:var(--space-1-5);opacity:0;transform:translateY(4px) scale(.98);pointer-events:none;transform-origin:bottom left;visibility:hidden;transition:opacity 180ms var(--ease), transform 220ms var(--ease-spring), visibility 0s linear 220ms;z-index:1001;}.rail-user-pop.open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto;visibility:visible;transition-delay:0s}@media (max-width: 600px){.rail-user-pop{left:0;bottom:calc(100% + 8px);max-width:min(224px, calc(100vw - 16px))}}.rail-user-pop .rup-head{display:flex;align-items:center;gap:var(--space-2-5);padding:var(--space-2-5);margin-bottom:var(--space-1);border-bottom:1px solid var(--line);}.rail-user-pop .rup-head .av{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#3A8D3F,#1E5C23);color:var(--text-inverse);font-size: var(--type-body-sm);font-weight:650;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:inset 0 0 0 1px rgba(255,255,255,.08);letter-spacing:.01em;}.rail-user-pop .rup-head .who{display:flex;flex-direction:column;gap:1px;min-width:0}.rail-user-pop .rup-head .n{font-size: var(--type-body);font-weight:600;color:var(--ink);letter-spacing:-.005em;line-height:1.2;white-space:nowrap}.rail-user-pop .rup-head .r{font-size: var(--type-micro);color:var(--text-3);font-weight:500;line-height:1.2}.rail-user-pop .rup-it{display:flex;align-items:center;gap:var(--space-2-5);width:100%;padding:var(--space-2) var(--space-2-5);border-radius:var(--radius-lg);background:transparent;border:none;text-align:left;cursor:pointer;font-family:inherit;font-size: var(--type-body);color:var(--text);font-weight:500;text-decoration:none;transition:background 140ms var(--ease), color 140ms var(--ease);}.rail-user-pop .rup-it:hover{background:var(--paper-2);color:var(--ink)}.rail-user-pop .rup-it.active{background:var(--brand-soft);color:var(--brand-deep)}.rail-user-pop .rup-it.active .ic{color:var(--brand)}.rail-user-pop .rup-it .ic{width:18px;height:18px;display:flex;align-items:center;justify-content:center;color:var(--text-3);flex-shrink:0;transition:color 140ms var(--ease);}.rail-user-pop .rup-it .ic svg{width:16px;height:16px;stroke:currentColor;fill:none}@media (pointer: coarse){.rail-user-pop .rup-it{min-height:44px}}.rail-user-pop .rup-it:hover .ic{color:var(--reference)}.rail-user-pop .rup-it.is-disabled{color:var(--text-4);cursor:help}.rail-user-pop .rup-it.is-disabled:hover{background:transparent;color:var(--text-4)}.rail-user-pop .rup-it.is-disabled:hover .ic{color:var(--text-4)}.rail-user-pop .rup-it.is-disabled::after{content:"Coming soon";margin-left:auto;font-size: var(--type-micro);color:var(--text-4);font-weight:500;padding:1px var(--space-1-5);border-radius:var(--radius-sm);background:var(--paper-3);}.rail-user-pop .rup-signout{color:var(--text-2)}.rail-user-pop .rup-signout:hover{color:var(--danger)}.rail-user-pop .rup-signout:hover .ic{color:var(--danger)}.rail-user-pop .rup-div{height:1px;background:var(--line);margin:var(--space-1) var(--space-2);}@media (prefers-reduced-motion: reduce){.rail-btn, .rail-btn svg, .rail-btn .lbl, .rail-btn .kbd, .rail-search-input, .rail-chat, .rail-chat-sep, .rail-chats-more, .rail-user, .rail-user .who, .rail-user .av, .rail-user-pop, .rail-user-pop .rup-it, .rail-user-pop .rup-head .av{transition:none !important;animation:none !important;}}