:root{--glass-bg: rgba(255, 255, 255, .08);--glass-bg-hover: rgba(255, 255, 255, .12);--glass-bg-active: rgba(255, 255, 255, .16);--glass-border: rgba(255, 255, 255, .12);--glass-border-hover: rgba(255, 255, 255, .2);--glass-specular: rgba(255, 255, 255, .15);--glass-blur: blur(24px) saturate(180%);--glass-blur-heavy: blur(40px) saturate(200%);--glass-shadow: 0 4px 24px rgba(0, 0, 0, .15);--glass-shadow-lg: 0 8px 40px rgba(0, 0, 0, .25);--glass-shadow-inset: inset 0 1px 0 var(--glass-specular);--accent: #ffffff;--accent-bright: #ffffff;--accent-dim: #d0d0d0;--accent-glass: rgba(255, 255, 255, .1);--accent-glass-border: rgba(255, 255, 255, .2);--text-primary: #f5f5f7;--text-secondary: rgba(255, 255, 255, .65);--text-muted: rgba(255, 255, 255, .4);--text-faint: rgba(255, 255, 255, .2);--red: #ff453a;--red-glass: rgba(255, 69, 58, .12);--green: #30d158;--yellow: #ffd60a;--code-bg: rgba(0, 0, 0, .25);--radius-xl: 24px;--radius-lg: 20px;--radius: 16px;--radius-md: 12px;--radius-sm: 8px;--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--sidebar-width: 280px;--ease-out: cubic-bezier(.22, 1, .36, 1);--ease-spring: cubic-bezier(.4, 0, .2, 1);--duration: .25s}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{height:100%;background:#0a0a0a}body{margin:0;padding:0;height:100%;overflow:hidden;font-family:Inter,-apple-system,BlinkMacSystemFont,SF Pro Text,system-ui,sans-serif;font-size:15px;line-height:1.5;color:var(--text-primary);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}.bg-layer{position:fixed;top:0;right:0;bottom:0;left:0;z-index:0;background:radial-gradient(ellipse at 15% 50%,rgba(40,40,45,.5),transparent 55%),radial-gradient(ellipse at 85% 15%,rgba(30,30,35,.4),transparent 45%),radial-gradient(ellipse at 50% 85%,rgba(25,25,30,.5),transparent 55%),radial-gradient(ellipse at 70% 60%,rgba(35,35,40,.3),transparent 40%),#0a0a0a;background-size:200% 200%;animation:bgShift 60s ease 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0);mask-composite:exclude;-webkit-mask-composite:xor;padding:1px;pointer-events:none;z-index:0}.login-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;width:100%;padding:32px;gap:24px}.login-logo{width:88px;height:88px;display:flex;align-items:center;justify-content:center;font-size:44px;font-weight:700;color:#fff;background:var(--accent-glass);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--accent-glass-border);border-radius:var(--radius-xl);box-shadow:var(--glass-shadow-inset),var(--glass-shadow-lg),0 0 60px #ffffff14}.login-title{font-size:14px;color:var(--text-muted);letter-spacing:.03em;text-transform:uppercase}.login-form{display:flex;flex-direction:column;gap:14px;width:100%;max-width:360px;background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid 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#ffffff1f}.login-btn:hover{opacity:.9}.login-btn:active{transform:scale(.98)}.login-btn:disabled{opacity:.4;cursor:not-allowed}.login-error{color:var(--red);font-size:13px;text-align:center}.chat-layout{display:flex;flex-direction:column;height:100%;flex:1;position:relative;min-width:0}.chat-layout.drag-over:after{content:"Drop files here";position:absolute;top:8px;right:8px;bottom:8px;left:8px;display:flex;align-items:center;justify-content:center;background:#ffffff0f;backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);color:var(--accent-bright);font-size:16px;font-weight:600;z-index:100;border:2px dashed var(--accent-glass-border);border-radius:var(--radius-lg)}.chat-header{display:flex;align-items:center;padding:12px 20px;padding-top:calc(12px + var(--safe-top));background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border-bottom:1px solid 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#ffffff14}.welcome-title{font-size:24px;font-weight:700;letter-spacing:-.02em;margin-top:4px}.welcome-subtitle{font-size:15px;color:var(--text-secondary);margin-bottom:8px}.welcome-chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:12px}.welcome-chip{padding:10px 22px;background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--glass-border);border-radius:var(--radius-lg);color:var(--text-primary);font-size:14px;font-family:inherit;cursor:pointer;transition:all var(--duration) var(--ease-spring);box-shadow:var(--glass-shadow-inset)}.welcome-chip:hover{background:var(--glass-bg-hover);border-color:var(--accent-glass-border);box-shadow:var(--glass-shadow-inset),0 0 20px #ffffff0f}.welcome-chip:active{transform:scale(.96)}@media(min-width:769px){.sessions-panel{position:relative;width:var(--sidebar-width);flex-shrink:0;display:flex;flex-direction:column;background:var(--glass-bg);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border-right:1px solid var(--glass-border);box-shadow:var(--glass-shadow-inset);z-index:1;pointer-events:auto}.sessions-panel .sessions-overlay{display:none}.sessions-panel .sessions-drawer{position:relative;width:100%;height:100%;display:flex;flex-direction:column;background:transparent;transform:none;border-right:none}.sessions-close{display:none!important}}@media(max-width:768px){.sessions-panel{position:fixed;top:0;right:0;bottom:0;left:0;z-index:500;pointer-events:none}.sessions-panel.open{pointer-events:auto}.sessions-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#0009;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);opacity:0;transition:opacity var(--duration)}.sessions-panel.open .sessions-overlay{opacity:1}.sessions-drawer{position:absolute;left:0;top:0;bottom:0;width:min(300px,82vw);background:#0a0a0aeb;backdrop-filter:var(--glass-blur-heavy);-webkit-backdrop-filter:var(--glass-blur-heavy);transform:translate(-100%);transition:transform .3s var(--ease-out);display:flex;flex-direction:column;border-right:1px solid var(--glass-border);box-shadow:var(--glass-shadow-lg)}.sessions-panel.open .sessions-drawer{transform:translate(0)}}.sessions-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;padding-top:calc(12px + var(--safe-top));border-bottom:1px solid var(--glass-border)}.sessions-header h2{font-size:17px;font-weight:600;color:var(--text-primary);letter-spacing:-.01em}.sessions-header-actions{display:flex;align-items:center;gap:8px}.new-chat-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;background:var(--accent);border:none;border-radius:var(--radius-md);color:#0a0a0a;font-size:13px;font-weight:600;font-family:inherit;cursor:pointer;transition:all var(--duration) var(--ease-spring);box-shadow:0 2px 12px #ffffff1a}.new-chat-btn:hover{opacity:.9;box-shadow:0 4px 16px #fff3}.new-chat-btn:active{transform:scale(.96)}.sessions-close{background:none;border:none;color:var(--text-muted);font-size:22px;cursor:pointer;padding:4px 8px;border-radius:var(--radius-sm);transition:all var(--duration) var(--ease-spring)}.sessions-close:hover{color:var(--text-primary);background:var(--glass-bg-hover)}.sessions-list{flex:1;overflow-y:auto;padding:8px 10px}.sessions-section-header{display:flex;align-items:center;gap:8px;padding:10px 12px 6px;font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;cursor:pointer;-webkit-user-select:none;user-select:none;transition:color var(--duration)}.sessions-section-header:hover{color:var(--text-secondary)}.sessions-section-header svg{width:12px;height:12px;transition:transform var(--duration) var(--ease-spring)}.sessions-section-header.collapsed svg{transform:rotate(-90deg)}.sessions-section-content.hidden{display:none}.session-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:var(--radius-md);cursor:pointer;transition:all var(--duration) var(--ease-spring);border:1px solid transparent;margin-bottom:2px}.session-item:hover{background:var(--glass-bg-hover);border-color:#ffffff0f}.session-item:active{transform:scale(.98)}.session-item.active{background:var(--accent-glass);border-color:var(--accent-glass-border);box-shadow:inset 0 1px #ffffff14}.session-icon{flex-shrink:0;color:var(--text-muted);display:flex;align-items:center;transition:color var(--duration)}.session-item.active .session-icon{color:var(--accent-bright)}.session-info{flex:1;min-width:0}.session-title{font-size:13px;font-weight:500;margin-bottom:1px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.session-meta{font-size:11px;color:var(--text-muted)}.session-badge{flex-shrink:0;min-width:22px;height:20px;padding:0 6px;display:flex;align-items:center;justify-content:center;background:#ffffff0f;border-radius:10px;font-size:11px;font-weight:600;color:var(--text-muted)}.session-item.active .session-badge{background:#ffffff14;color:var(--accent-bright)}.sessions-empty,.sessions-loading{padding:32px 20px;text-align:center;color:var(--text-muted);font-size:13px}.install-banner{position:fixed;bottom:0;left:0;right:0;padding:14px 18px;padding-bottom:calc(14px + var(--safe-bottom));background:var(--glass-bg);backdrop-filter:var(--glass-blur-heavy);-webkit-backdrop-filter:var(--glass-blur-heavy);border-top:1px solid var(--glass-border);display:flex;align-items:center;justify-content:space-between;z-index:300;animation:slideUp .3s var(--ease-out);box-shadow:var(--glass-shadow-inset),var(--glass-shadow-lg)}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.install-banner-text{font-size:13px}.install-banner-btn{padding:8px 18px;background:var(--accent);border:none;border-radius:var(--radius-sm);color:#0a0a0a;font-size:13px;font-weight:600;font-family:inherit;cursor:pointer;box-shadow:0 2px 12px #ffffff1a}.install-banner-dismiss{background:none;border:none;color:var(--text-muted);font-size:20px;cursor:pointer;padding:4px;margin-left:8px}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:2px}::-webkit-scrollbar-thumb:hover{background:#fff3}@media(max-width:480px){.message{max-width:88%}.chat-input{font-size:16px}.messages{padding:16px 12px}}