.install-banner{z-index:1000;padding:14px 16px;padding-bottom:calc(14px + env(safe-area-inset-bottom,0px));background:var(--sidebar-bg);color:#fff;justify-content:space-between;align-items:center;gap:12px;display:flex;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -2px 12px #0003}.install-banner__content{flex:1;align-items:center;gap:10px;min-width:0;display:flex}.install-banner__icon{color:var(--primary-light);flex-shrink:0}.install-banner__text{flex-direction:column;gap:2px;min-width:0;display:flex}.install-banner__title{font-size:14px;font-weight:600;line-height:1.3}.install-banner__sub{color:#ffffffa6;flex-wrap:wrap;align-items:center;gap:3px;font-size:12px;line-height:1.4;display:flex}.install-banner__inline-icon{vertical-align:middle;flex-shrink:0;display:inline-block}.install-banner__actions{flex-shrink:0;align-items:center;gap:8px;display:flex}.install-banner__install-btn{background:var(--primary);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:6px;padding:7px 16px;font-size:13px;font-weight:600;transition:background .15s}.install-banner__install-btn:hover{background:var(--primary-dark)}.install-banner__close{color:#fff9;cursor:pointer;background:0 0;border:none;justify-content:center;align-items:center;padding:4px;transition:color .15s;display:flex}.install-banner__close:hover{color:#fff}.offline-page{background:var(--main-bg);justify-content:center;align-items:center;height:100vh;display:flex}.offline-page__box{text-align:center;border:1px solid var(--border);background:#fff;border-radius:16px;flex-direction:column;align-items:center;gap:10px;width:90%;max-width:440px;padding:48px 40px;display:flex}.offline-page__icon{background:var(--primary-light);width:80px;height:80px;color:var(--primary);border-radius:50%;justify-content:center;align-items:center;margin-bottom:6px;display:flex}.offline-page__title{color:var(--text-primary);margin:0;font-size:22px;font-weight:700}.offline-page__desc{color:var(--text-secondary);max-width:340px;margin:0;font-size:14px;line-height:1.6}.offline-page__actions{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:16px;display:flex}.offline-page__btn{cursor:pointer;border:1.5px solid var(--border);color:var(--text-primary);background:#fff;border-radius:8px;padding:10px 28px;font-size:14px;font-weight:600;transition:background .15s,border-color .15s}.offline-page__btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}.offline-page__btn.primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}.nav-progress{z-index:9999;pointer-events:none;background:0 0;height:2px;position:fixed;top:0;left:0;right:0;overflow:hidden}.nav-progress__bar{background:var(--primary,#5062ec);will-change:transform;width:40%;height:100%;animation:1.1s ease-in-out infinite nav-progress-slide;box-shadow:0 0 8px #5062ec99}@keyframes nav-progress-slide{0%{transform:translate(-100%)}to{transform:translate(350%)}}.nav-progress__overlay{z-index:9998;-webkit-backdrop-filter:blur(1.5px);cursor:wait;pointer-events:auto;will-change:opacity;background:#1118272e;animation:.18s ease-out nav-progress-overlay-fade;position:fixed;inset:0}@keyframes nav-progress-overlay-fade{0%{opacity:0}to{opacity:1}}@media (prefers-reduced-motion:reduce){.nav-progress__bar{animation-duration:1.8s}.nav-progress__overlay{animation:none}}.server-error-page{background:var(--main-bg);justify-content:center;align-items:center;height:100vh;display:flex}.server-error-page__box{text-align:center;border:1px solid var(--border);background:#fff;border-radius:16px;flex-direction:column;align-items:center;gap:10px;width:90%;max-width:440px;padding:48px 40px;display:flex}.server-error-page__code{color:var(--error);letter-spacing:-2px;font-size:80px;font-weight:800;line-height:1}.server-error-page__title{color:var(--text-primary);margin:0;font-size:22px;font-weight:700}.server-error-page__desc{color:var(--text-secondary);max-width:340px;margin:0;font-size:14px;line-height:1.6}.server-error-page__actions{flex-wrap:wrap;justify-content:center;gap:12px;margin-top:16px;display:flex}.server-error-page__btn{cursor:pointer;border:1.5px solid var(--border);color:var(--text-primary);background:#fff;border-radius:8px;padding:10px 28px;font-size:14px;font-weight:600;text-decoration:none;transition:background .15s,border-color .15s;display:inline-block}.server-error-page__btn:hover{border-color:var(--primary);color:var(--primary)}.server-error-page__btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}.server-error-page__btn.primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff}:root{--primary:#5062ec;--primary-dark:#3a4dd4;--primary-darker:#2d3db8;--primary-light:#eef0fd;--sidebar-bg:#1a1f3a;--main-bg:#f5f6ff;--header-bg:#fff;--chat-bg:#fff;--text-primary:#111827;--text-secondary:#6b7280;--border:#e5e7eb;--error:#ef4444;--error-dark:#b91c1c;--error-light:#fee2e2;--error-hover:#fef2f2;--success:#10b981;--success-light:#d1fae5;--success-dark:#065f46;--warning-light:#fef3c7;--warning-dark:#92400e;--surface:#fff;--surface-subtle:#fafafa;--surface-muted:#f3f4f6;--summary-bg:#ede9fe;--summary-color:#6d28d9;--amber:#f59e0b;--sidebar-card-bg:#2a3055;--sidebar-card-bg-hover:#323869;--sidebar-card-border:#3a4170;--sidebar-border:#ffffff12;--sidebar-hover:#ffffff0f;--sidebar-active-bg:#5062ec38;--sidebar-text:#ffffffd9;--sidebar-text-dim:#fff6;--sidebar-text-inactive:#6b7a99;--user-bubble-bg:#5062ec;--user-bubble-text:#fff;--bot-bubble-bg:#fff;--bot-bubble-text:#111827;--online-dot:#10b981}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;overflow:hidden}body{color:var(--text-primary);background:var(--main-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;line-height:1.5}a{color:inherit;text-decoration:none}button{cursor:pointer;font:inherit;background:0 0;border:none}input,textarea,select{font:inherit}ul,ol{list-style:none}img{max-width:100%;display:block}