:root{--bg-app: #0D0E11;--bg-surface: #121316;--bg-surface-elevated: #18191E;--bg-surface-hover: #22242B;--bg-card: rgba(24, 25, 30, .78);--bg-overlay: rgba(13, 14, 17, .85);--border-subtle: rgba(255, 255, 255, .08);--border-medium: rgba(255, 255, 255, .14);--border-strong: rgba(255, 255, 255, .22);--border-accent: color-mix(in srgb, var(--accent) 35%, transparent);--fg-primary: #F4F4F6;--fg-secondary: #9DA1AB;--fg-muted: #646875;--accent: #F59E0B;--accent-hover: color-mix(in srgb, var(--accent) 85%, #000000);--accent-dim: color-mix(in srgb, var(--accent) 12%, transparent);--accent-glow: color-mix(in srgb, var(--accent) 25%, transparent);--accent-primary: var(--accent);--accent-amber: var(--accent);--accent-amber-hover: var(--accent-hover);--accent-amber-dim: var(--accent-dim);--accent-amber-glow: var(--accent-glow);--chat-font-family: var(--font-sans);--chat-msg-font-size: 14.5px;--chat-msg-line-height: 1.65;--chat-code-font-size: 13.5px;--chat-row-padding-y: 12px;--chat-row-gap: 12px;--chat-user-bubble-padding: 12px 18px;--chat-avatar-size: 32px;--color-success: #10B981;--color-success-dim: rgba(16, 185, 129, .12);--color-danger: #EF4444;--color-danger-dim: rgba(239, 68, 68, .12);--color-info: #38BDF8;--color-info-dim: rgba(56, 189, 248, .12);--color-indigo: #818CF8;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;--radius-xs: 6px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-xl: 24px;--radius-full: 9999px;--space-2xs: 4px;--space-xs: 8px;--space-sm: 12px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .2);--shadow-md: 0 4px 16px rgba(0, 0, 0, .35);--shadow-lg: 0 12px 36px rgba(0, 0, 0, .5);--transition-fast: .15s ease;--transition-smooth: .28s cubic-bezier(.16, 1, .3, 1);--z-content: 1;--z-header: 50;--z-overlay: 80;--z-sidebar: 90;--z-dropdown: 100;--z-modal: 200;--z-toast: 300;--sidebar-width: 280px;--sidebar-collapsed-width: 0px;--header-height: 56px;--composer-max-width: 760px;--msg-max-width: 760px}html.light-mode,html.light-theme{--bg-app: #FAF8F5;--bg-surface: #FFFFFF;--bg-surface-elevated: #F2EDE4;--bg-surface-hover: #E7E1D6;--bg-card: #FFFFFF;--bg-overlay: rgba(250, 248, 245, .88);--border-subtle: rgba(0, 0, 0, .08);--border-medium: rgba(0, 0, 0, .14);--border-strong: rgba(0, 0, 0, .24);--border-accent: color-mix(in srgb, var(--accent) 40%, transparent);--fg-primary: #1C1917;--fg-secondary: #57534E;--fg-muted: #78716C;--accent: #D97706;--accent-hover: color-mix(in srgb, var(--accent) 85%, #000000);--accent-dim: color-mix(in srgb, var(--accent) 14%, transparent);--accent-glow: color-mix(in srgb, var(--accent) 18%, transparent);--accent-primary: var(--accent);--accent-amber: var(--accent);--accent-amber-hover: var(--accent-hover);--accent-amber-dim: var(--accent-dim);--accent-amber-glow: var(--accent-glow);--color-success: #059669;--color-success-dim: #D1FAE5;--color-danger: #DC2626;--color-danger-dim: #FEE2E2;--color-info: #0284C7;--color-info-dim: #E0F2FE;--color-indigo: #4F46E5;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .05);--shadow-md: 0 4px 16px rgba(0, 0, 0, .08);--shadow-lg: 0 12px 36px rgba(0, 0, 0, .1)}html[data-accent=emerald]{--accent: #10B981}html[data-accent=cyan]{--accent: #06B6D4}html[data-accent=violet]{--accent: #8B5CF6}html[data-accent=rose]{--accent: #F43F5E}html[data-accent=amber]{--accent: #F59E0B}html.light-mode[data-accent=emerald],html.light-theme[data-accent=emerald]{--accent: #059669}html.light-mode[data-accent=cyan],html.light-theme[data-accent=cyan]{--accent: #0284C7}html.light-mode[data-accent=violet],html.light-theme[data-accent=violet]{--accent: #7C3AED}html.light-mode[data-accent=rose],html.light-theme[data-accent=rose]{--accent: #E11D48}html.light-mode[data-accent=amber],html.light-theme[data-accent=amber]{--accent: #D97706}html[data-font=inter]{--chat-font-family: var(--font-sans)}html[data-font=jakarta]{--chat-font-family: "Plus Jakarta Sans", var(--font-sans)}html[data-font=serif]{--chat-font-family: "Source Serif 4", Georgia, serif}html[data-font=mono]{--chat-font-family: var(--font-mono)}html[data-font=system]{--chat-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}html[data-font-scale=compact]{--chat-msg-font-size: 13.5px;--chat-msg-line-height: 1.55;--chat-code-font-size: 12.5px}html[data-font-scale=default]{--chat-msg-font-size: 14.5px;--chat-msg-line-height: 1.65;--chat-code-font-size: 13.5px}html[data-font-scale=large]{--chat-msg-font-size: 16.5px;--chat-msg-line-height: 1.72;--chat-code-font-size: 14.5px}html[data-density=default]{--chat-row-padding-y: 12px;--chat-row-gap: 14px;--chat-user-bubble-padding: 12px 18px;--chat-avatar-size: 32px}html[data-density=compact]{--chat-row-padding-y: 0px;--chat-row-gap: 10px;--chat-user-bubble-padding: 10px 14px;--chat-avatar-size: 32px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%;height:100%;overflow:hidden}body{font-family:var(--font-sans);background-color:var(--bg-app);background-image:radial-gradient(rgba(255,255,255,.08) 1px,transparent 1px);background-size:24px 24px;color:var(--fg-primary);line-height:1.6;position:fixed;inset:0;width:100%;height:100%;height:100dvh;overflow:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-smooth),color var(--transition-smooth)}html.light-mode body,html.light-theme body{background-image:radial-gradient(rgba(0,0,0,.16) 1.2px,transparent 1.2px)}.gradient-amber-text{background:linear-gradient(135deg,#f59e0b,#fbbf24,#f97316);-webkit-background-clip:text;-webkit-text-fill-color:transparent}:focus-visible{outline:2px solid var(--accent-amber);outline-offset:2px}::selection{background-color:var(--accent-amber-dim);color:var(--accent-amber)}a{color:inherit;text-decoration:none}button{font:inherit;border:none;background:none;cursor:pointer}code,pre{font-family:var(--font-mono)}.skip-link{position:absolute;top:-100px;left:16px;background:var(--accent-amber);color:#0d0e11;padding:10px 16px;border-radius:var(--radius-sm);font-weight:600;z-index:9999;transition:top .2s ease}.skip-link:focus{top:16px}.ambient-glow-mesh{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}.glow-orb{position:absolute;border-radius:50%;filter:blur(120px);opacity:.2}.glow-orb-primary{width:clamp(360px,48vw,640px);height:clamp(360px,48vw,640px);background:radial-gradient(circle,var(--accent-amber) 0%,transparent 70%);top:-100px;right:10%;animation:float-drift-1 22s ease-in-out infinite alternate}.glow-orb-secondary{width:clamp(280px,38vw,480px);height:clamp(280px,38vw,480px);background:radial-gradient(circle,var(--color-indigo) 0%,transparent 70%);bottom:-80px;left:8%;opacity:.14;animation:float-drift-2 26s ease-in-out infinite alternate}@keyframes float-drift-1{0%{transform:translate(0) scale(1)}50%{transform:translate(-30px,40px) scale(1.08)}to{transform:translate(25px,-20px) scale(.95)}}@keyframes float-drift-2{0%{transform:translate(0) scale(1)}50%{transform:translate(40px,-30px) scale(1.1)}to{transform:translate(-20px,35px) scale(.92)}}html.light-mode .glow-orb-primary,html.light-theme .glow-orb-primary{opacity:.16}html.light-mode .glow-orb-secondary,html.light-theme .glow-orb-secondary{opacity:.1}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);min-height:40px;padding:8px 20px;border-radius:var(--radius-full);font-size:14px;font-weight:600;white-space:nowrap;transition:all var(--transition-fast)}.btn-primary{background-color:var(--accent-amber);color:#0d0e11;box-shadow:0 4px 14px var(--accent-amber-glow)}.btn-primary:hover{background-color:var(--accent-amber-hover);transform:translateY(-1px)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background-color:var(--bg-surface-elevated);color:var(--fg-primary);border:1px solid var(--border-medium)}.btn-secondary:hover{background-color:var(--bg-surface-hover);border-color:var(--fg-secondary)}.btn-danger{background-color:var(--color-danger);color:#fff;box-shadow:0 4px 14px var(--color-danger-dim)}.btn-danger:hover{background-color:#dc2626}.btn-icon-sm{width:36px;height:36px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;color:var(--fg-secondary);transition:all var(--transition-fast)}.btn-icon-sm:hover{color:var(--fg-primary);background:var(--bg-surface-hover)}.btn-icon-sm .material-symbols-outlined{font-size:20px}.auth-gate{position:fixed;inset:0;z-index:var(--z-modal);display:flex;align-items:center;justify-content:center;background-color:var(--bg-app);overflow:hidden}.auth-grid-overlay{position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);background-size:24px 24px;mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,#000 40%,transparent 85%);-webkit-mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,#000 40%,transparent 85%);pointer-events:none}html.light-mode .auth-grid-overlay,html.light-theme .auth-grid-overlay{background-image:radial-gradient(rgba(0,0,0,.18) 1.2px,transparent 1.2px)}.auth-ambient-glow{position:absolute;width:clamp(380px,50vw,640px);height:clamp(380px,50vw,640px);border-radius:50%;background:radial-gradient(circle,rgba(245,158,11,.16) 0%,rgba(99,102,241,.08) 45%,transparent 70%);filter:blur(100px);pointer-events:none;animation:auth-aura-pulse 10s ease-in-out infinite alternate}@keyframes auth-aura-pulse{0%{transform:scale(.95);opacity:.75}to{transform:scale(1.15);opacity:1}}.auth-card{position:relative;display:flex;flex-direction:column;align-items:center;gap:var(--space-lg);padding:clamp(32px,5vw,44px);max-width:420px;width:90%;text-align:center;background:#121316c2;backdrop-filter:blur(28px);-webkit-backdrop-filter:blur(28px);border:1px solid var(--border-medium);border-radius:var(--radius-xl);box-shadow:0 24px 64px #000000a6,0 0 0 1px #ffffff0a;transition:transform var(--transition-smooth),opacity var(--transition-smooth);animation:auth-card-appear .4s cubic-bezier(.16,1,.3,1);z-index:2}.auth-card:before{content:"";position:absolute;top:0;left:20%;right:20%;height:1.5px;background:linear-gradient(90deg,transparent,var(--accent-amber),transparent);border-radius:9999px;opacity:.85}html.light-mode .auth-card,html.light-theme .auth-card{background:#ffffffe0;box-shadow:0 20px 48px #00000014}@keyframes auth-card-appear{0%{opacity:0;transform:translateY(12px) scale(.98)}to{opacity:1;transform:translateY(0) scale(1)}}.auth-loading-state{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-md);z-index:3;animation:auth-card-appear .3s ease}.auth-loading-ring{width:64px;height:64px;border-radius:50%;background:var(--bg-surface-elevated);border:2px solid var(--border-accent);display:flex;align-items:center;justify-content:center;box-shadow:0 0 24px var(--accent-amber-glow);animation:logo-glow-breathe 2s ease-in-out infinite alternate}.auth-loading-logo{object-fit:contain}@keyframes logo-glow-breathe{0%{transform:scale(.96);box-shadow:0 0 14px var(--accent-amber-glow)}to{transform:scale(1.04);box-shadow:0 0 32px var(--accent-amber)}}.auth-loading-spinner{width:24px;height:24px;border-radius:50%;border:2.5px solid var(--border-subtle);border-top-color:var(--accent-amber);animation:spin .8s linear infinite}.auth-loading-text{font-size:13.5px;font-weight:500;color:var(--fg-secondary);letter-spacing:-.01em}html.auth-hint-logged-in .auth-card{display:none!important}html.auth-hint-logged-in .auth-loading-state{display:flex!important}.auth-theme-toggle-btn{position:absolute;top:var(--space-md);right:var(--space-md);z-index:10;width:40px;height:40px;border-radius:var(--radius-full);background:var(--bg-surface-elevated);border:1px solid var(--border-medium);color:var(--fg-secondary);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-sm);transition:all var(--transition-fast);cursor:pointer}.auth-theme-toggle-btn:hover{color:var(--fg-primary);background:var(--bg-surface-hover);border-color:var(--border-strong);transform:scale(1.05)}html.light-mode .auth-theme-toggle-btn,html.light-theme .auth-theme-toggle-btn{background:#fff;border-color:#00000024;color:#1c1917;box-shadow:0 2px 8px #0000000d}html.light-mode .auth-theme-toggle-btn:hover,html.light-theme .auth-theme-toggle-btn:hover{background:#f5efeb;border-color:#00000040}html.light-mode .auth-ambient-glow,html.light-theme .auth-ambient-glow{background:radial-gradient(circle,rgba(217,119,6,.14) 0%,rgba(79,70,229,.06) 45%,transparent 70%)}html.light-mode .auth-loading-ring,html.light-theme .auth-loading-ring{background:#fff;border-color:var(--accent-amber);box-shadow:0 0 24px #d9770633}html.light-mode .auth-card,html.light-theme .auth-card{background:#ffffffeb;border:1px solid rgba(0,0,0,.1);box-shadow:0 20px 48px #0000000f,0 0 0 1px #00000008}.auth-brand{display:flex;align-items:center;gap:var(--space-sm)}.auth-brand-icon{width:36px;height:36px;border-radius:var(--radius-sm);object-fit:contain}.auth-brand-name{font-size:22px;font-weight:700;letter-spacing:-.02em}.auth-title{font-size:clamp(28px,4vw,36px);font-weight:700;letter-spacing:-.03em;line-height:1.1;background:linear-gradient(180deg,#fff 60%,#ffffffb8);-webkit-background-clip:text;-webkit-text-fill-color:transparent}html.light-mode .auth-title,html.light-theme .auth-title{background:linear-gradient(180deg,#1c1917 60%,#44403c);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.auth-subtitle{font-size:15px;color:var(--fg-secondary);line-height:1.5;max-width:320px}.auth-google-btn{display:flex;align-items:center;gap:var(--space-sm);width:100%;max-width:320px;padding:12px 24px;background:#fff;color:#0d0e11;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-full);font-size:14.5px;font-weight:600;box-shadow:0 4px 18px #ffffff1f;transition:all var(--transition-fast);justify-content:center;cursor:pointer}.auth-google-btn:hover{background:#f4f4f6;transform:translateY(-1px);box-shadow:0 6px 24px #ffffff38}.auth-google-btn:active{transform:translateY(0)}.auth-google-btn:disabled{opacity:.6;cursor:wait}html.light-mode .auth-google-btn,html.light-theme .auth-google-btn{background:#fff;color:#1c1917;border:1px solid rgba(0,0,0,.14);box-shadow:0 2px 10px #0000000f}html.light-mode .auth-google-btn:hover,html.light-theme .auth-google-btn:hover{background:#f7f5f0;border-color:#00000038;box-shadow:0 4px 16px #0000001a}.auth-terms-note{font-size:12px;line-height:1.55;color:var(--fg-muted);max-width:310px;text-align:center;margin-top:14px}.auth-terms-note a{color:var(--accent-amber);text-decoration:underline;text-underline-offset:2px;transition:opacity var(--transition-fast)}.auth-terms-note a:hover{opacity:.85}.auth-error{font-size:13px;color:var(--color-danger);min-height:20px}.auth-back-link{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--fg-muted);transition:color var(--transition-fast)}.auth-back-link:hover{color:var(--fg-primary)}.workspace{display:flex;height:100%;height:100dvh;overflow:hidden}.sidebar-overlay{position:fixed;inset:0;z-index:var(--z-overlay);background:#000000a6;opacity:0;pointer-events:none;visibility:hidden;transition:opacity var(--transition-smooth),visibility var(--transition-smooth)}.sidebar-overlay.active{opacity:1;pointer-events:auto;visibility:visible;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}@media(min-width:861px){.sidebar-overlay{display:none!important}}.chat-sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);height:100%;height:100dvh;background:var(--bg-surface);border-right:1px solid var(--border-subtle);display:flex;flex-direction:column;transition:width var(--transition-smooth),min-width var(--transition-smooth),transform var(--transition-smooth);z-index:var(--z-sidebar);overflow:hidden}.chat-sidebar.collapsed{width:0;min-width:0;border-right:none}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-xs) var(--space-sm);min-height:var(--header-height);border-bottom:1px solid var(--border-subtle);flex-shrink:0}.sidebar-brand{display:flex;align-items:center;gap:10px;text-decoration:none;cursor:pointer;transition:all var(--transition-fast)}.sidebar-brand-icon{width:22px;height:22px;border-radius:var(--radius-xs);object-fit:contain;transition:transform var(--transition-fast),filter .25s ease}.sidebar-brand:hover .sidebar-brand-icon{transform:scale(1.05);filter:drop-shadow(0 0 5px rgba(245,158,11,.35))}.sidebar-brand-name{font-size:16px;font-weight:700;letter-spacing:-.02em;color:var(--fg-primary);white-space:nowrap;transition:color var(--transition-fast),filter .25s ease,background .25s ease}.sidebar-brand:hover .sidebar-brand-name{background:linear-gradient(135deg,#f59e0b,#fbbf24,#f97316);-webkit-background-clip:text;-webkit-text-fill-color:transparent;filter:drop-shadow(0 0 6px rgba(245,158,11,.35))}.sidebar-header-actions{display:flex;align-items:center;gap:2px}.chat-sidebar.collapsed .sidebar-header,.chat-sidebar.collapsed .sidebar-search-wrapper,.chat-sidebar.collapsed .conversation-list,.chat-sidebar.collapsed .sidebar-profile{opacity:0;pointer-events:none;transition:opacity .1s ease}.sidebar-search-wrapper{position:relative;padding:var(--space-sm);flex-shrink:0}.sidebar-search-icon{position:absolute;left:22px;top:50%;transform:translateY(-50%);font-size:18px;color:var(--fg-muted);pointer-events:none}.sidebar-search-input{width:100%;padding:8px 36px;background:var(--bg-surface-elevated);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);font-size:13px;color:var(--fg-primary);font-family:var(--font-sans);outline:none;transition:border-color var(--transition-fast)}.sidebar-search-input::placeholder{color:var(--fg-muted)}.sidebar-search-input:focus{border-color:var(--accent-amber)}.sidebar-kbd-hint{position:absolute;right:20px;top:50%;transform:translateY(-50%);font-family:var(--font-mono);font-size:10px;font-weight:600;padding:2px 6px;border-radius:4px;background:var(--bg-surface);border:1px solid var(--border-medium);color:var(--fg-muted);pointer-events:none}.conversation-list{flex:1;overflow-y:auto;padding:var(--space-xs) var(--space-sm)}.sidebar-date-heading{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.06em;color:var(--fg-muted);padding:var(--space-md) var(--space-sm) var(--space-xs)}.conversation-item{position:relative;display:flex;align-items:center;justify-content:space-between;padding:9px 12px;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast);gap:var(--space-xs);min-height:40px;border-left:3px solid transparent}.conversation-item:hover{background:var(--bg-surface-hover);border-left-color:var(--border-medium)}.conversation-item.active{background:linear-gradient(90deg,color-mix(in srgb,var(--accent) 16%,transparent) 0%,color-mix(in srgb,var(--accent) 4%,transparent) 40%,var(--bg-surface-elevated) 75%);border-left:3px solid var(--accent);box-shadow:inset 2px 0 12px color-mix(in srgb,var(--accent) 18%,transparent)}.conversation-item.active:before{content:"";position:absolute;left:-3px;top:4px;bottom:4px;width:3px;border-radius:var(--radius-full);background:var(--accent);box-shadow:-4px 0 12px 1px color-mix(in srgb,var(--accent) 65%,transparent),-1px 0 4px color-mix(in srgb,var(--accent) 85%,transparent);pointer-events:none}.conversation-item.active .chat-title{color:var(--fg-primary);font-weight:600}.chat-title{font-size:13px;color:var(--fg-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1;cursor:pointer}.delete-chat-btn{opacity:0;display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:var(--radius-full);color:var(--fg-muted);transition:all var(--transition-fast);flex-shrink:0}.conversation-item:hover .delete-chat-btn{opacity:1}.delete-chat-btn:hover{color:var(--color-danger);background:var(--color-danger-dim)}.sidebar-empty{display:flex;align-items:center;justify-content:center;padding:var(--space-2xl) var(--space-md);color:var(--fg-muted);font-size:13px;text-align:center}.sidebar-profile{display:flex;align-items:center;justify-content:space-between;gap:var(--space-xs);padding:var(--space-sm);border-top:1px solid var(--border-subtle);flex-shrink:0}.profile-meta{display:flex;align-items:center;gap:var(--space-sm);flex:1;min-width:0}.profile-avatar{width:32px;height:32px;border-radius:50%;object-fit:cover;border:2px solid var(--border-subtle);flex-shrink:0}.profile-avatar-fallback{width:32px;height:32px;border-radius:50%;background:var(--accent-amber-dim);color:var(--accent-amber);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;border:2px solid var(--border-accent);flex-shrink:0}.profile-text{display:flex;flex-direction:column;flex:1;min-width:0}.profile-name{font-size:13px;font-weight:600;color:var(--fg-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.profile-email{font-size:11px;color:var(--fg-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.profile-logout-btn{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:var(--radius-full);color:var(--fg-muted);flex-shrink:0;transition:all var(--transition-fast)}.profile-logout-btn:hover{color:var(--color-danger);background:var(--color-danger-dim)}.chat-main{flex:1;display:flex;flex-direction:column;min-width:0;height:100%;height:100dvh;background:var(--bg-app)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:env(safe-area-inset-top,0px) var(--space-md) 0;min-height:calc(var(--header-height) + env(safe-area-inset-top,0px));height:calc(var(--header-height) + env(safe-area-inset-top,0px));border-bottom:1px solid 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var(--accent-amber);border-top-color:transparent;border-radius:50%;animation:spin .6s linear infinite}.tool-text strong{font-weight:700}.welcome-screen{flex:1;min-height:0;display:flex;align-items:center;justify-content:center;padding:clamp(var(--space-sm),2.8vh,var(--space-2xl)) var(--space-md);overflow-y:auto;scrollbar-width:thin}.welcome-content{display:flex;flex-direction:column;align-items:center;gap:clamp(var(--space-xs),2vh,var(--space-lg));text-align:center;max-width:560px;width:100%;margin:auto 0}.welcome-icon-ring{width:clamp(52px,8.5vh,80px);height:clamp(52px,8.5vh,80px);border-radius:50%;background:linear-gradient(135deg,var(--accent-dim),color-mix(in srgb,var(--accent) 4%,transparent));border:2px solid var(--border-accent);display:flex;align-items:center;justify-content:center;box-shadow:0 0 clamp(16px,3.5vh,40px) var(--accent-glow);flex-shrink:0}.welcome-logo{width:clamp(30px,5vh,48px);height:clamp(30px,5vh,48px);border-radius:var(--radius-sm);object-fit:contain}.welcome-greeting{font-size:clamp(20px,min(3.5vw,3.8vh),32px);font-weight:700;letter-spacing:-.02em;color:var(--fg-primary);display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px}.greeting-badge{display:inline-flex;align-items:center;justify-content:center;width:clamp(26px,3.5vh,34px);height:clamp(26px,3.5vh,34px);border-radius:50%;background:transparent;color:var(--accent-amber);margin-right:2px}.greeting-text{color:var(--fg-primary)}.greeting-name{font-weight:800}.welcome-subtitle{font-size:clamp(12.5px,1.8vh,15px);color:var(--fg-secondary);line-height:1.4}.welcome-cards-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(var(--space-2xs),1.2vh,var(--space-sm));width:100%;margin-top:clamp(0px,.6vh,var(--space-sm))}.quick-card{display:flex;align-items:center;gap:clamp(8px,1.5vw,12px);padding:clamp(8px,1.4vh,14px) 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.material-symbols-outlined{font-size:18px;color:var(--accent-amber)}.empty-conversation-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;margin:auto;max-width:440px;padding:var(--space-2xl) var(--space-md)}.empty-icon-ring{width:64px;height:64px;border-radius:50%;background:var(--accent-amber-dim);border:1.5px solid var(--border-accent);display:flex;align-items:center;justify-content:center;margin-bottom:var(--space-md)}.empty-title{font-size:18px;font-weight:700;color:var(--fg-primary);margin-bottom:6px}.empty-desc{font-size:13.5px;color:var(--fg-secondary);line-height:1.5}.messages-container{flex:1;overflow-y:auto;display:flex;flex-direction:column;padding:var(--space-lg) var(--space-md);gap:var(--space-xs)}.message-row{display:flex;gap:var(--chat-row-gap, var(--space-sm));max-width:var(--msg-max-width);width:100%;margin:0 auto;padding:var(--chat-row-padding-y, var(--space-sm)) 0;opacity:1}.message-row.user{padding-top:calc(var(--chat-row-padding-y, 12px) * 1.3);padding-bottom:calc(var(--chat-row-padding-y, 12px) * .7)}.message-row.assistant{padding-bottom:var(--chat-row-padding-y, 12px)}.message-row.user .msg-body{display:flex;flex-direction:column;align-items:flex-start}.message-row.user .msg-content{background:var(--bg-surface-elevated);border:1px solid var(--border-medium);border-radius:4px 18px 18px;padding:var(--chat-user-bubble-padding, 12px 18px);font-family:var(--chat-font-family, var(--font-sans));font-size:var(--chat-msg-font-size, 14.5px);font-weight:500;line-height:var(--chat-msg-line-height, 1.55);color:var(--fg-primary);display:inline-block;max-width:90%;box-shadow:0 2px 10px #00000038;transition:border-color var(--transition-fast),padding var(--transition-fast),font-size var(--transition-fast)}.message-row.user .msg-content:hover{border-color:var(--border-strong)}html.light-mode .message-row.user .msg-content,html.light-theme .message-row.user .msg-content{background:#fff;border-color:#0000001f;box-shadow:0 2px 8px #0000000a}.msg-avatar{width:var(--chat-avatar-size, 32px);height:var(--chat-avatar-size, 32px);border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px;transition:width var(--transition-fast),height var(--transition-fast)}.msg-avatar.assistant{background:var(--bg-surface-elevated);border:1.5px solid var(--border-accent);padding:2px;transition:all var(--transition-fast)}.msg-avatar.user{background:var(--bg-surface-elevated);border:1.5px solid var(--border-medium);color:var(--fg-secondary);overflow:hidden}.msg-avatar-img{width:100%;height:100%;object-fit:cover;border-radius:50%}.msg-avatar-nt{object-fit:contain}.msg-body{flex:1;min-width:0}.msg-content{font-family:var(--chat-font-family, var(--font-sans));font-size:var(--chat-msg-font-size, 14.5px);line-height:var(--chat-msg-line-height, 1.65);color:var(--fg-primary);word-break:break-word;transition:font-size var(--transition-fast),line-height var(--transition-fast)}.msg-content p{margin-bottom:.8em}.msg-content p:last-child{margin-bottom:0}.msg-content ul,.msg-content ol{padding-left:1.6em;margin-bottom:.8em}.msg-content li{margin-bottom:.3em}.msg-content strong{font-weight:600}.msg-content em{font-style:italic}.msg-content a{color:var(--accent-amber);text-decoration:underline;text-underline-offset:2px}.msg-content a:hover{color:var(--accent-amber-hover)}.msg-content blockquote{border-left:3px solid var(--accent-amber);padding:4px 16px;margin:8px 0;color:var(--fg-secondary);font-style:italic;background:var(--accent-amber-dim);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.msg-content code:not(pre code){background:var(--bg-surface-elevated);padding:2px 6px;border-radius:4px;font-size:.88em;color:var(--accent-amber);border:1px solid var(--border-subtle)}.msg-content table{width:100%;border-collapse:collapse;margin:8px 0;font-size:13px}.msg-content th,.msg-content td{padding:8px 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0;border-radius:var(--radius-md);border:1px solid var(--border-medium);overflow:hidden;background:#0d0e11}html.light-mode .code-block-wrapper,html.light-theme .code-block-wrapper{background:#fafaf9}.code-block-header{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:#ffffff0a;border-bottom:1px solid var(--border-subtle);min-height:36px}html.light-mode .code-block-header,html.light-theme .code-block-header{background:#00000008}.code-lang-info{display:flex;align-items:center;gap:8px}.code-lang-dot{width:8px;height:8px;border-radius:50%}.code-lang-name{font-family:var(--font-mono);font-size:11px;font-weight:500;color:var(--fg-muted);text-transform:uppercase;letter-spacing:.04em}.code-header-actions{display:flex;align-items:center;gap:4px}.code-block-wrapper pre{margin:0;padding:16px;overflow-x:auto;font-size:13px;line-height:1.7}.code-block-wrapper pre code{font-family:var(--font-mono);background:none;padding:0;border:none;color:inherit}.html-preview-container{padding:0}.html-preview-iframe{width:100%;min-height:300px;border:none;background:#fff;border-radius:0 0 var(--radius-md) var(--radius-md)}.composer-wrapper{padding:0 var(--space-md) max(var(--space-md),env(safe-area-inset-bottom,0px));flex-shrink:0}.image-preview-bar{display:flex;gap:var(--space-xs);padding:var(--space-xs) 0;overflow-x:auto;max-width:var(--composer-max-width);margin:0 auto}.image-preview-thumb{position:relative;flex-shrink:0}.image-preview-thumb img{width:64px;height:64px;object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--border-medium)}.remove-preview-btn{position:absolute;top:-4px;right:-4px;width:20px;height:20px;border-radius:50%;background:var(--bg-surface);border:1px solid var(--border-medium);display:flex;align-items:center;justify-content:center;color:var(--fg-muted);cursor:pointer;transition:all var(--transition-fast)}.remove-preview-btn:hover{background:var(--color-danger-dim);color:var(--color-danger);border-color:var(--color-danger)}.preview-upload-badge{position:absolute;bottom:4px;left:4px;font-size:10px;font-weight:600;padding:2px 6px;background:#000000b3;color:var(--fg-primary);border-radius:4px}.preview-upload-badge.error{background:var(--color-danger);color:#fff}.composer-bar{display:flex;align-items:center;gap:0;max-width:var(--composer-max-width);margin:0 auto;background:#121316d1;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--border-medium);border-radius:var(--radius-lg);padding:6px 8px 6px 6px;transition:border-color var(--transition-fast),box-shadow var(--transition-fast),background var(--transition-fast);position:relative;z-index:1;box-shadow:0 4px 24px #00000052}html.light-mode .composer-bar,html.light-theme .composer-bar{background:#ffffffe6;box-shadow:0 4px 24px #00000014}.composer-bar:focus-within{border-color:var(--accent-amber);box-shadow:0 0 0 3px var(--accent-amber-glow),0 8px 32px #00000073}.composer-footer-hint{max-width:var(--composer-max-width);margin:8px auto 0;text-align:center;font-size:11.5px;color:var(--fg-muted);user-select:none;letter-spacing:-.01em}.composer-footer-hint strong{font-weight:600;color:var(--fg-secondary)}.composer-left{display:flex;align-items:center;flex-shrink:0}.composer-right{display:flex;align-items:center;gap:6px;flex-shrink:0}.composer-icon-btn{width:36px;height:36px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;color:var(--fg-muted);transition:all var(--transition-fast);flex-shrink:0}.composer-icon-btn:hover{color:var(--fg-primary);background:var(--bg-surface-hover)}.composer-icon-btn .material-symbols-outlined{font-size:20px}.composer-icon-btn:disabled{opacity:.4;cursor:not-allowed}.composer-textarea{flex:1;resize:none;border:none;outline:none;background:transparent;color:var(--fg-primary);font-family:var(--font-sans);font-size:14px;line-height:1.5;padding:11.5px 14px;max-height:200px;min-height:36px;scrollbar-width:thin;align-self:center}.composer-textarea::placeholder{color:var(--fg-muted)}.composer-textarea:disabled{opacity:.5}.model-selector-wrapper{position:relative;flex-shrink:0}.model-trigger{display:flex;align-items:center;gap:6px;padding:6px 14px;height:32px;border-radius:var(--radius-full);font-size:12px;font-weight:500;color:var(--fg-secondary);background:var(--bg-surface-elevated);border:1px solid var(--border-medium);transition:all var(--transition-fast);white-space:nowrap;cursor:pointer}.model-trigger:hover,.model-trigger.menu-open{color:var(--accent);border-color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,transparent);box-shadow:0 0 16px var(--accent-glow)}.model-trigger-icon{font-size:16px;color:var(--accent);transition:transform var(--transition-fast)}.model-trigger:hover .model-trigger-icon,.model-trigger.menu-open .model-trigger-icon{transform:rotate(5deg)}.model-trigger-chevron{font-size:14px;color:var(--fg-muted);transition:transform var(--transition-fast)}.model-trigger.menu-open .model-trigger-chevron{transform:rotate(180deg);color:var(--accent-amber)}.model-dropdown-label{max-width:140px;overflow:hidden;text-overflow:ellipsis;font-weight:600}.composer-send-btn{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--bg-surface-elevated);color:var(--fg-muted);border:1px solid var(--border-subtle);transition:all var(--transition-fast);flex-shrink:0}.composer-send-btn:disabled{opacity:.4;cursor:not-allowed}.composer-send-btn .material-symbols-outlined{font-size:18px}.composer-send-btn.illuminated{background:var(--accent-amber);color:#0d0e11;border-color:var(--accent-amber);cursor:pointer;box-shadow:0 0 16px var(--accent-amber-glow)}.composer-send-btn.illuminated:hover{background:var(--accent-amber-hover);transform:scale(1.05)}.streaming-glow-caret{display:inline-flex;align-items:center;justify-content:center;position:relative;width:7px;height:16px;margin-left:5px;vertical-align:-2px;background:linear-gradient(180deg,#fbbf24,#f59e0b 60%,#ea580c);border-radius:3px;box-shadow:0 0 10px #f59e0b,0 0 20px #f59e0bb3;animation:caret-energy-pulse .6s cubic-bezier(.4,0,.2,1) infinite alternate}.caret-aura{position:absolute;inset:-4px;border-radius:6px;background:radial-gradient(circle,rgba(245,158,11,.4) 0%,transparent 75%);pointer-events:none;animation:aura-radiate 1.2s ease-in-out infinite}@keyframes caret-energy-pulse{0%{transform:scaleY(.85) scaleX(.9);opacity:.7;box-shadow:0 0 6px #f59e0b}to{transform:scaleY(1.05) scaleX(1);opacity:1;box-shadow:0 0 14px #f59e0b,0 0 24px #f59e0bbf}}@keyframes aura-radiate{0%,to{opacity:.35;transform:scale(1)}50%{opacity:.85;transform:scale(1.4)}}.msg-avatar.assistant.streaming-beacon{box-shadow:0 0 0 3px var(--accent-amber-dim),0 0 20px var(--accent-amber-glow);animation:avatar-beacon-pulse 1.3s ease-in-out infinite;border-color:var(--accent-amber)}@keyframes avatar-beacon-pulse{0%,to{box-shadow:0 0 0 2px var(--accent-amber-dim),0 0 12px var(--accent-amber-glow)}50%{box-shadow:0 0 0 4px #f59e0b40,0 0 22px #f59e0b8c}}.message-row.stream-settled{animation:stream-finish-fade .35s ease forwards;opacity:1}@keyframes stream-finish-fade{0%{opacity:.85}to{opacity:1}}.msg-thinking-indicator{display:inline-flex;align-items:center;gap:10px;padding:8px 16px;margin:2px 0;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 8%,transparent),color-mix(in srgb,var(--accent) 2%,transparent));border:1px solid var(--border-accent);border-radius:var(--radius-full, 9999px);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 2px 14px #00000040,0 0 16px color-mix(in srgb,var(--accent) 8%,transparent);user-select:none;pointer-events:none;position:relative;overflow:hidden;animation:thinking-enter .28s cubic-bezier(.16,1,.3,1) forwards}html.light-mode .msg-thinking-indicator,html.light-theme .msg-thinking-indicator{background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 10%,transparent),color-mix(in srgb,var(--accent) 4%,transparent));border-color:var(--border-accent);box-shadow:0 2px 10px #0000000f,0 0 14px color-mix(in srgb,var(--accent) 10%,transparent)}.thinking-aura{position:absolute;inset:-6px;background:radial-gradient(circle at 20% 50%,color-mix(in srgb,var(--accent) 15%,transparent) 0%,transparent 70%);border-radius:inherit;pointer-events:none;animation:thinking-aura-pulse 2.4s ease-in-out infinite 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