:root{--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--bg-primary: #f2f2f2;--bg-secondary: #f8fafc;--bg-navbar: rgba(255, 255, 255, .8);--bg-card: rgba(0, 0, 0, .02);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--border-primary: rgba(0, 0, 0, .05);--accent-primary: #38bdf8;--accent-secondary: #818cf8;--nav-active: #38bdf8;--bg-hover: rgba(0, 0, 0, .05);--bg-active: rgba(0, 0, 0, .1);--hero-gradient: radial-gradient( circle at top center, #f8fafc 0%, #ffffff 100% );--card-shadow: 0 10px 30px rgba(0, 0, 0, .05);--error-text: #b91c1c;--error-bg: rgba(239, 68, 68, .05);--error-border: rgba(239, 68, 68, .2);--code-bg: rgba(0, 0, 0, .05);--code-border: rgba(0, 0, 0, .05);--pre-bg: #1e293b;--modal-backdrop: rgba(0, 0, 0, .5);--blockquote-bg: rgba(56, 189, 248, .05);--th-bg: rgba(0, 0, 0, .02);--accent-subtle: rgba(56, 189, 248, .1);--accent-muted: rgba(56, 189, 248, .2);--accent-pulse: rgba(56, 189, 248, .4);--scrollbar-thumb: rgba(0, 0, 0, .1);--padding-base: .5rem 1rem;--margin-base: .5rem;--gap-base: .25rem;--btn-radius: .5rem;--btn-height: 40px;--btn-padding: .5rem;--btn-bg: var(--bg-secondary);--btn-border: var(--border-primary);--btn-text: var(--text-primary);--btn-hover-bg: var(--bg-hover);--btn-hover-border: var(--accent-primary);--btn-transition: all .2s cubic-bezier(.4, 0, .2, 1);--input-bg: var(--bg-secondary);--input-border: var(--border-primary);--input-radius: var(--btn-radius);--input-padding: .6rem 1rem;--input-focus-bg: var(--bg-primary);--input-focus-border: var(--accent-primary);--input-focus-shadow: 0 0 0 4px var(--accent-subtle);--input-transition: all .2s cubic-bezier(.4, 0, .2, 1)}html.dark{--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-navbar: rgba(15, 23, 42, .8);--bg-card: rgba(255, 255, 255, .05);--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--border-primary: rgba(255, 255, 255, .1);--accent-primary: #38bdf8;--accent-secondary: #818cf8;--nav-active: #38bdf8;--bg-hover: rgba(255, 255, 255, .1);--bg-active: rgba(255, 255, 255, .2);--hero-gradient: radial-gradient( circle at top center, #1e293b 0%, #020617 100% );--card-shadow: 0 20px 50px rgba(0, 0, 0, .4);--error-text: #fca5a5;--error-bg: rgba(239, 68, 68, .1);--error-border: rgba(239, 68, 68, .2);--code-bg: rgba(255, 255, 255, .1);--code-border: rgba(255, 255, 255, .1);--pre-bg: rgba(15, 23, 42, .8);--modal-backdrop: rgba(0, 0, 0, .7);--blockquote-bg: rgba(56, 189, 248, .1);--th-bg: rgba(255, 255, 255, .05);--accent-subtle: rgba(56, 189, 248, .15);--accent-muted: rgba(56, 189, 248, .25);--accent-pulse: rgba(56, 189, 248, .5);--scrollbar-thumb: rgba(255, 255, 255, .1);--padding-base: .5rem 1rem;--margin-base: .5rem;--gap-base: .25rem;--btn-radius: .5rem;--btn-height: 40px;--btn-padding: .5rem;--btn-bg: var(--bg-secondary);--btn-border: var(--border-primary);--btn-text: var(--text-primary);--btn-hover-bg: var(--bg-hover);--btn-hover-border: var(--accent-primary);--btn-transition: all .2s cubic-bezier(.4, 0, .2, 1);--input-bg: var(--bg-secondary);--input-border: var(--border-primary);--input-radius: var(--btn-radius);--input-padding: .6rem 1rem;--input-focus-bg: var(--bg-primary);--input-focus-border: var(--accent-primary);--input-focus-shadow: 0 0 0 4px var(--accent-subtle);--input-transition: all .2s cubic-bezier(.4, 0, .2, 1)}body{margin:0;padding:0;background-color:var(--bg-primary);background-image:var(--hero-gradient);background-attachment:fixed;color:var(--text-primary);font-family:var(--font-sans);font-size:.9rem;min-height:100vh;transition:background-color .3s ease,color .3s ease}*{box-sizing:border-box}a{color:inherit;text-decoration:none}input,textarea,select{width:100%;background:var(--input-bg);border:1px solid var(--input-border);border-radius:var(--input-radius);padding:var(--input-padding);color:var(--text-primary);font-family:var(--font-sans);font-size:.9rem;outline:none;transition:var(--input-transition)}input:focus,textarea:focus,select:focus{background:var(--input-focus-bg);border-color:var(--input-focus-border);box-shadow:var(--input-focus-shadow)}textarea{min-height:100px;resize:vertical}select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .75rem center;padding-right:2.5rem}button,.btn-base{display:inline-flex;align-items:center;justify-content:center;gap:var(--gap-base);font-family:inherit;font-size:.9rem;font-weight:600;cursor:pointer;border:1px solid transparent;background:transparent;padding:0;border-radius:var(--btn-radius);color:var(--text-primary);transition:var(--btn-transition);-webkit-user-select:none;user-select:none;white-space:nowrap;outline:none}button:hover:not(:disabled){transform:translateY(-1px)}button:active:not(:disabled){transform:translateY(0)}button:disabled{opacity:.5;cursor:not-allowed}.login-form{display:flex;flex-direction:column;align-items:center;text-align:center}.login-header{margin-bottom:var(--margin-base)}.google-logo{margin-bottom:var(--margin-base);display:flex;justify-content:center}.login-form h2{margin:0;font-size:1.5rem;color:var(--text-primary)}.login-form p{margin:var(--margin-base) 0 0;color:var(--text-secondary);font-size:.9rem}.google-signin-btn{width:100%;padding:var(--btn-padding);background:var(--btn-bg);border:1px solid var(--btn-border);color:var(--btn-text);height:var(--btn-height)}.google-signin-btn:hover{background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.terms{margin-top:var(--margin-base);font-size:.75rem;color:var(--text-muted)}.terms a{color:var(--accent-primary);text-decoration:underline}.markdown-content{line-height:1.6;color:inherit;font-size:inherit}.markdown-content :global(h1),.markdown-content :global(h2),.markdown-content :global(h3),.markdown-content :global(h4){margin-top:var(--margin-base);margin-bottom:var(--margin-base);font-weight:700;line-height:1.25}.markdown-content :global(h1){font-size:1.5rem}.markdown-content :global(h2){font-size:1.25rem}.markdown-content :global(h3){font-size:1.125rem}.markdown-content :global(p){margin-bottom:var(--margin-base)}.markdown-content :global(p:last-child){margin-bottom:0}.markdown-content :global(ul),.markdown-content :global(ol){margin-bottom:var(--margin-base);padding-left:1.5rem}.markdown-content :global(li){margin-bottom:var(--gap-base)}.markdown-content :global(code){background:var(--code-bg);padding:.25rem .5rem;border-radius:var(--btn-radius);font-family:JetBrains Mono,Fira Code,monospace;font-size:.9em;border:1px solid var(--code-border)}.markdown-content :global(pre){background:var(--pre-bg);padding:var(--padding-base);border-radius:var(--btn-radius);overflow-x:auto;margin-bottom:var(--margin-base);border:1px solid var(--border-primary);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.markdown-content :global(pre code){background:transparent;padding:0;border:none;display:block;line-height:1.5}.markdown-content :global(blockquote){border-left:4px solid var(--accent-primary);padding:var(--padding-base);margin:0 0 var(--margin-base) 0;color:var(--text-secondary);background:var(--blockquote-bg);border-radius:0 .5rem .5rem 0}.markdown-content :global(a){color:var(--accent-primary);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s}.markdown-content :global(a:hover){border-bottom-color:var(--accent-primary)}.markdown-content :global(table){width:100%;border-collapse:collapse;margin-bottom:var(--margin-base)}.markdown-content :global(th),.markdown-content :global(td){padding:var(--padding-base);border:1px solid var(--border-primary);text-align:left}.markdown-content :global(th){background:var(--th-bg);font-weight:600}.crawler-container{display:flex;flex-direction:column;align-items:center;gap:var(--gap-base);width:100%}.minimal-form{position:relative;width:100%;display:flex;background:var(--bg-navbar);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border-primary);border-radius:var(--btn-radius);padding:var(--padding-base);transition:var(--btn-transition);box-shadow:var(--card-shadow)}.minimal-form:focus-within{border-color:var(--accent-primary);box-shadow:0 0 0 4px var(--accent-subtle);transform:translateY(-2px)}.minimal-form input{padding:var(--padding-base);background:transparent;border:none}.minimal-form input:focus{background:transparent;border:none;box-shadow:none}.btn-sparkle{background:var(--btn-bg);border:1px solid var(--btn-border);color:var(--btn-text);padding:var(--btn-padding);font-weight:700;min-width:120px;height:var(--btn-height)}.btn-sparkle:hover:not(:disabled){background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.crawler-status{margin-top:.5rem}.status-badge{display:flex;align-items:center;gap:.5rem;font-size:.9rem;font-weight:600;color:var(--accent-primary);background:var(--bg-secondary);padding:.4rem .8rem;border-radius:var(--btn-radius);border:1px solid var(--border-primary)}.pulse{width:8px;height:8px;background:var(--accent-primary);border-radius:50%;box-shadow:0 0 #38bdf866;animation:pulse 2s infinite}@keyframes pulse{0%{box-shadow:0 0 #38bdf8b3}70%{box-shadow:0 0 0 10px #38bdf800}to{box-shadow:0 0 #38bdf800}}.message.error{color:var(--error-text);font-size:.9rem;background:var(--error-bg);padding:var(--padding-base);border-radius:var(--btn-radius);border:1px solid var(--error-border);width:100%;text-align:center}.spinner{display:inline-block;width:1rem;height:1rem;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin-right:.5rem;vertical-align:middle}.modal-backdrop{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--modal-backdrop);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem}.modal-container{background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--btn-radius);width:100%;max-width:800px;box-shadow:var(--card-shadow);overflow:hidden;padding:var(--padding-base)}.modal-header{padding:var(--padding-base);display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border-primary)}.modal-header h3{margin:0;font-size:1.25rem;font-weight:600;color:var(--text-primary)}.close-button{color:var(--text-muted);padding:.25rem}.close-button:hover{color:var(--text-primary);background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.modal-body{padding:var(--padding-base)}.navbar{background:var(--bg-navbar);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-primary);position:sticky;top:0;z-index:50;padding:var(--padding-base)}.nav-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:var(--gap-base)}.logo{font-size:1.5rem;font-weight:800;text-decoration:none;background:linear-gradient(to right,var(--accent-primary),var(--accent-secondary));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.logo span{font-weight:300}.nav-actions{display:flex;align-items:center;gap:var(--gap-base)}.lang-switcher-container{position:relative}.lang-trigger{background:var(--bg-secondary);padding:var(--btn-padding);border:1px solid var(--border-primary);height:var(--btn-height)}.lang-trigger:hover{background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.lang-trigger .flag-icon{width:28px;height:28px;overflow:hidden;display:flex;align-items:center;justify-content:center}.current-lang-code{color:var(--text-secondary);font-size:.75rem}.chevron{transition:transform .2s;color:var(--text-muted)}.chevron.open{transform:rotate(180deg)}.lang-dropdown{position:absolute;top:calc(100% + var(--margin-base));right:0;background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--btn-radius);box-shadow:var(--card-shadow);display:flex;flex-direction:column;z-index:100}.lang-option{display:flex;align-items:center;padding:var(--btn-padding);border-radius:var(--btn-radius);border:1px solid transparent;background:transparent;color:var(--text-secondary);cursor:pointer;transition:all .2s;font-size:.9rem;text-align:left;width:100%}.lang-option:hover{background:var(--bg-secondary);color:var(--text-primary)}.lang-option.active{color:var(--accent-primary);background:#38bdf80d}.lang-option .flag-icon{width:28px;overflow:hidden;flex-shrink:0;display:flex;align-items:center;justify-content:center}.lang-label{flex:1}.check-icon{color:var(--accent-primary)}.flag-icon :global(svg){width:100%;height:100%;object-fit:cover}.user-profile{display:flex;align-items:center;gap:var(--gap-base);padding:var(--padding-base);background:var(--bg-secondary);border-radius:var(--btn-radius);border:1px solid var(--border-primary)}.user-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover}.user-avatar-placeholder{width:28px;height:28px;border-radius:50%;background:var(--accent-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700}.user-name{font-size:.9rem;font-weight:600;color:var(--text-primary);max-width:100px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.login-btn{background:var(--btn-bg);border:1px solid var(--btn-border);color:var(--accent-primary);height:var(--btn-height);padding:var(--btn-padding)}.login-btn:hover{background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.theme-toggle{background:var(--bg-secondary);border:1px solid var(--border-primary);width:var(--btn-height);height:var(--btn-height);padding:var(--btn-padding)}.theme-toggle:hover{background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.theme-toggle svg{color:var(--accent-primary)}.app-layout{min-height:90vh}.main-wrapper{flex:1;display:flex;flex-direction:column;padding:var(--padding-base);max-width:1200px;margin:0 auto;width:100%}.content{display:flex;flex-direction:column;gap:var(--gap-base);width:100%}.hero{text-align:center;margin-bottom:var(--margin-base)}.hero h2{font-size:3rem;font-weight:800;letter-spacing:-.05em;background:linear-gradient(135deg,var(--accent-primary) 0%,var(--accent-secondary) 100%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin:0}.hero p{color:var(--text-secondary);font-size:1.1rem;margin-top:var(--margin-base)}.crawler-section{display:flex;flex-direction:column;align-items:center;gap:var(--gap-base);width:100%}.input-wrapper{flex:1}.chat-section{width:100%;flex:1;display:flex;flex-direction:column}.chat-container{background:var(--bg-card);border:1px solid var(--border-primary);border-radius:var(--btn-radius);height:850px;display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--card-shadow);width:100%}.chat-header{padding:var(--padding-base);border-bottom:1px solid var(--border-primary);background:var(--bg-navbar)}.header-info{display:flex;justify-content:space-between;align-items:center;gap:var(--gap-base)}.header-left{display:flex;align-items:center;gap:var(--gap-base);flex:1}.header-new-chat-btn{background:var(--btn-bg);border:1px solid var(--btn-border);color:var(--accent-primary);padding:var(--btn-padding);height:var(--btn-height);border-radius:var(--btn-radius);display:inline-flex;align-items:center;justify-content:center;gap:var(--gap-base);font-family:inherit;font-size:.9rem;font-weight:600;cursor:pointer;transition:var(--btn-transition)}.header-new-chat-btn:hover{background:var(--btn-hover-bg);border-color:var(--accent-primary);transform:translateY(-1px)}.header-new-chat-btn:active{transform:translateY(0)}.session-search-wrapper{position:relative;flex:1;max-width:400px}.search-input-icon{position:absolute;left:.75rem;top:50%;transform:translateY(-50%);color:var(--text-muted);display:flex;pointer-events:none}.session-search-wrapper input{padding-left:2.2rem}.search-dropdown{position:absolute;top:calc(100% + var(--margin-base));left:0;right:0;background:var(--bg-primary);border:1px solid var(--border-primary);border-radius:var(--btn-radius);box-shadow:var(--card-shadow);z-index:100;max-height:300px;overflow-y:auto;padding:var(--padding-base);display:flex;flex-direction:column;gap:var(--gap-base)}.search-dropdown a,.search-dropdown .dropdown-item{display:flex;flex-direction:column;padding:var(--padding-base);border-radius:var(--btn-radius);transition:all .2s;background:transparent;border:1px solid transparent;width:100%;text-align:left;cursor:pointer;text-decoration:none;font-family:inherit}.search-dropdown a:hover,.search-dropdown .dropdown-item:hover{background:var(--bg-secondary);border-color:var(--border-primary)}.dropdown-title{font-weight:600;font-size:.9rem;color:var(--text-primary)}.dropdown-date{font-size:.75rem;color:var(--text-muted)}.no-results{padding:1rem;text-align:center;color:var(--text-muted);font-size:.9rem}.header-info h3{margin:0;font-size:1.1rem;font-weight:700;color:var(--text-primary)}.stats-chip{background:var(--btn-bg);color:var(--accent-primary);padding:var(--btn-padding);border:1px solid var(--btn-border)}.stats-chip:hover{background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.stats-chip svg{color:var(--accent-primary)}.chat-history{flex:1;padding:var(--padding-base);display:flex;flex-direction:column;gap:var(--gap-base);overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) transparent;position:relative}.empty-chat{display:flex;align-items:center;justify-content:center;height:100%;color:var(--text-muted);text-align:center;padding:2rem}.chat-loading-overlay{position:absolute;inset:0;background:var(--bg-navbar);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;z-index:10}.chat-bubble{max-width:80%;padding:var(--padding-base);border-radius:var(--btn-radius);font-size:.9rem;line-height:1.6;animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.chat-bubble.user{align-self:flex-end;background:linear-gradient(135deg,var(--bg-secondary) 0%,var(--bg-navbar) 100%);color:var(--text-primary);border-bottom-right-radius:.25rem;box-shadow:var(--card-shadow);border:1px solid var(--border-primary)}.chat-bubble.bot{align-self:flex-start;background:var(--accent-subtle);color:var(--text-primary);border-bottom-left-radius:.25rem;border:1px solid var(--accent-muted)}.chat-input-wrapper{padding:var(--padding-base);display:flex;gap:var(--gap-base);background:var(--bg-navbar);border-top:1px solid var(--border-primary)}.send-btn{background:var(--btn-bg);border:1px solid var(--btn-border);color:var(--accent-primary);width:var(--btn-height);height:var(--btn-height);border-radius:var(--btn-radius)}.send-btn:hover:not(:disabled){background:var(--btn-hover-bg);border-color:var(--btn-hover-border);transform:scale(1.05) translateY(-1px);box-shadow:0 4px 12px var(--accent-subtle)}.send-btn:disabled{opacity:.5;cursor:not-allowed}.send-btn svg{width:22px;height:22px}.message.error{color:var(--error-text);font-size:.9rem;background:var(--error-bg);padding:.75rem 1.25rem;border-radius:var(--btn-radius);border:1px solid var(--error-border)}.spinner{width:1.5rem;height:1.5rem;border:2px solid var(--border-primary);border-top-color:var(--accent-primary);border-radius:50%;animation:spin .8s linear infinite}.spinner.small{width:1.1rem;height:1.1rem}@keyframes spin{to{transform:rotate(360deg)}}.dot{width:.4rem;height:.4rem;background:var(--accent-primary);border-radius:50%;animation:bounce 1.4s infinite ease-in-out both;display:inline-block;margin:0 2px}.dot:nth-child(1){animation-delay:-.32s}.dot:nth-child(2){animation-delay:-.16s}@keyframes bounce{0%,80%,to{transform:scale(0)}40%{transform:scale(1)}}@media(max-width:640px){.hero h2{font-size:2.25rem}.chat-container{height:500px}.chat-bubble{max-width:90%}}.chat-layout{display:flex;gap:var(--gap-base);width:100%;flex:1}.sessions-sidebar{width:280px;background:var(--bg-card);border:1px solid var(--border-primary);border-radius:var(--btn-radius);display:flex;flex-direction:column;overflow:hidden;box-shadow:var(--card-shadow);height:700px}.sidebar-header{padding:var(--padding-base);border-bottom:1px solid var(--border-primary);display:flex;justify-content:space-between;align-items:center}.sidebar-header h3{margin:0;font-size:1.1rem;font-weight:700;color:var(--text-primary)}.new-chat-btn{padding:var(--btn-padding);background:var(--btn-bg);border:1px solid var(--btn-border);color:var(--btn-text);height:var(--btn-height)}.new-chat-btn:hover{background:var(--btn-hover-bg);border-color:var(--btn-hover-border)}.sessions-list{flex:1;overflow-y:auto;padding:var(--padding-base);display:flex;flex-direction:column;gap:var(--gap-base);scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) transparent}.session-item{padding:var(--padding-base);border-radius:var(--btn-radius);text-decoration:none;color:var(--text-primary);transition:all .2s;border:1px solid transparent}.session-item:hover{background:var(--bg-secondary);border-color:var(--border-primary)}.session-item.active{background:var(--accent-subtle);border-color:var(--accent-muted)}.session-info{display:flex;flex-direction:column;gap:var(--gap-base)}.session-title{font-weight:600;font-size:.9rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.session-date{font-size:.75rem;color:var(--text-muted)}.empty-sessions{text-align:center;color:var(--text-muted);padding:2rem;font-size:.9rem}@media(max-width:1024px){.chat-layout{flex-direction:column}.sessions-sidebar{width:100%;height:250px}.chat-container{height:600px}}