:root{--bg-app: #0f1117;--bg-radial: radial-gradient(circle at 50% 30%, #1e1b4b 0%, #0f1117 70%);--bg-sidebar: rgba(15, 17, 23, .92);--border-sidebar: rgba(255, 255, 255, .1);--text-main: #f8fafc;--text-muted: #cbd5e1;--card-bg: rgba(255, 255, 255, .05);--card-border: rgba(255, 255, 255, .12);--input-bg: rgba(255, 255, 255, .07);--input-border: rgba(255, 255, 255, .16);--topbar-border: rgba(255, 255, 255, .08);--msg-bot-bg: rgba(255, 255, 255, .08);--msg-bot-border: rgba(255, 255, 255, .14);--modal-bg: #181b26;--selector-bg: rgba(255, 255, 255, .08);--selector-border: rgba(255, 255, 255, .16);--dropdown-popover-bg: rgba(24, 27, 38, .96);--dropdown-bg: #1e1b4b;--dropdown-text: #ffffff}[data-theme=light]{--bg-app: #f8fafc;--bg-radial: radial-gradient(circle at 50% 30%, #e0e7ff 0%, #f1f5f9 70%);--bg-sidebar: rgba(255, 255, 255, .95);--border-sidebar: rgba(0, 0, 0, .1);--text-main: #0f172a;--text-muted: #475569;--card-bg: rgba(255, 255, 255, .9);--card-border: rgba(0, 0, 0, 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ease;margin-bottom:1.25rem}.new-chat-btn:hover{background-color:#6366f140;border-color:#6366f180;transform:translateY(-1px)}.sessions-list{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:.35rem}.session-item{display:flex;align-items:center;justify-content:space-between;padding:.75rem .85rem;border-radius:10px;cursor:pointer;font-size:.95rem;font-weight:600;color:var(--text-muted);transition:all .2s ease}.session-item:hover,.session-item.active{background-color:var(--card-bg);color:var(--text-main)}.session-item.active{border-left:3.5px solid #818cf8;font-weight:700}.session-title{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:170px}.delete-session-btn{opacity:0;background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;transition:opacity .2s ease}.session-item:hover 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var(--border-sidebar)}.user-info{display:flex;align-items:center;gap:.7rem;font-size:.95rem;font-weight:700;color:var(--text-main)}.sidebar-avatar{position:relative;cursor:pointer;overflow:hidden;width:36px;height:36px}.avatar-img{width:100%;height:100%;border-radius:50%;object-fit:cover}.avatar-upload-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:#0009;border-radius:50%;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .2s;color:#fff}.sidebar-avatar:hover .avatar-upload-overlay{opacity:1}.user-profile-actions{display:flex;align-items:center;gap:.25rem}.edit-name-btn,.logout-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:6px;border-radius:8px;display:flex;align-items:center;justify-content:center;transition:all .2s ease}.edit-name-btn:hover{background-color:var(--card-bg);color:#818cf8}.logout-btn:hover{background-color:#ef444426;color:#ef4444}.main-content{flex:1;display:flex;flex-direction:column;height:100%;position:relative;overflow:hidden}.top-bar{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1.5rem;border-bottom:1px solid var(--topbar-border);min-height:56px;background:var(--bg-app);z-index:15}.top-bar-left{display:flex;align-items:center;gap:.65rem}.top-bar-brand{display:flex;align-items:center;gap:.5rem;cursor:pointer;padding:2px 6px;border-radius:8px;transition:background-color .2s}.top-bar-brand:hover{background-color:var(--card-bg)}.top-bar-logo{width:28px;height:28px;border-radius:8px;object-fit:cover;box-shadow:0 2px 8px 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#0000000f}.card-category{display:flex;align-items:center;gap:.45rem;font-size:.82rem;font-weight:700;color:#818cf8;text-transform:uppercase;letter-spacing:.06em}.card-icon{color:#818cf8}.card-text{font-size:1.02rem;font-weight:600;color:var(--text-main);line-height:1.45}.suggestion-card:hover{background:#6366f129;border-color:#6366f166;transform:translateY(-2px)}.chat-container{flex:1;overflow-y:auto;padding:1.75rem 2rem;display:flex;flex-direction:column;gap:1.5rem;max-width:880px;width:100%;margin:0 auto}.message-bubble{display:flex;gap:1.15rem;max-width:82%}.message-bubble.user{align-self:flex-end;flex-direction:row-reverse}.message-bubble.assistant{align-self:flex-start}.avatar{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem;flex-shrink:0;overflow:hidden;box-shadow:0 6px 14px #00000040}.avatar.user{background:linear-gradient(135deg,#3b82f6,#1d4ed8);color:#fff}.avatar.assistant{background:linear-gradient(135deg,#a855f7,#6366f1);color:#fff}.message-content{background:var(--msg-bot-bg);border:1px solid var(--msg-bot-border);color:var(--text-main);padding:1.05rem 1.35rem;border-radius:18px;font-size:1.05rem;font-weight:600;line-height:1.6;white-space:pre-wrap;letter-spacing:.01em}.message-bubble.assistant .message-content{border-top-left-radius:4px;background:linear-gradient(145deg,var(--msg-bot-bg),rgba(255,255,255,.03));border:1px solid var(--msg-bot-border);border-top:1px solid rgba(255,255,255,.25);box-shadow:0 10px 24px -4px #00000059,0 4px 8px -2px #00000040,inset 0 1px 1px #ffffff26;transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s ease}.message-bubble.assistant .message-content:hover{transform:translateY(-2px);box-shadow:0 14px 28px -4px #00000073,0 6px 12px -2px #6366f133,inset 0 1px 1px #ffffff40}.message-bubble.user .message-content{background:linear-gradient(145deg,#6366f1,#4f46e5);color:#fff;border:none;font-size:1.05rem;font-weight:600;line-height:1.6;border-top-right-radius:4px;box-shadow:0 10px 24px -4px #4f46e566,0 4px 8px -2px #0003,inset 0 1px 1px #ffffff4d;transition:transform .2s ease,box-shadow .2s ease}.message-bubble.user .message-content:hover{transform:translateY(-2px);box-shadow:0 14px 28px -4px #4f46e580,0 6px 12px -2px #0000004d,inset 0 1px 1px #ffffff59}.input-container-wrapper{max-width:880px;width:100%;margin:0 auto;padding:0 1.5rem 1.5rem}.input-box-header{display:flex;align-items:center;margin-bottom:.6rem;padding-left:.25rem}.custom-mode-dropdown-container{position:relative;display:inline-block}.mode-selector-pill{display:flex;align-items:center;gap:.55rem;background:var(--selector-bg);border:1px solid var(--selector-border);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:20px;padding:.45rem .95rem;color:var(--text-main);font-size:.92rem;font-weight:700;cursor:pointer;box-shadow:0 4px 14px #00000014;transition:all .2s ease}.mode-selector-pill:hover{border-color:#6366f180;box-shadow:0 4px 18px #6366f133}.chevron-icon{color:var(--text-muted);transition:transform .2s ease}.chevron-icon.open{transform:rotate(180deg)}.custom-dropdown-menu{position:absolute;bottom:calc(100% + 8px);left:0;min-width:270px;background:var(--dropdown-popover-bg);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--card-border);border-radius:16px;padding:.5rem;box-shadow:0 -14px 40px #0006,0 0 24px #6366f12e;z-index:50;animation:dropdownFadeInUp .2s cubic-bezier(.16,1,.3,1)}@keyframes dropdownFadeInUp{0%{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}.custom-dropdown-item{display:flex;align-items:center;gap:.75rem;padding:.65rem .85rem;border-radius:12px;cursor:pointer;transition:all .15s ease}.custom-dropdown-item:hover{background:#6366f124}.custom-dropdown-item.selected{background:#6366f138}.item-icon-wrapper{display:flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:8px;background:#ffffff0f;flex-shrink:0}.item-text-wrapper{flex:1;display:flex;flex-direction:column}.item-title{font-size:.92rem;font-weight:700;color:var(--text-main)}.item-desc{font-size:.78rem;font-weight:600;color:var(--text-muted)}.item-check{color:#818cf8;flex-shrink:0}.input-container{display:flex;align-items:center;background:linear-gradient(135deg,var(--input-bg),rgba(99,102,241,.04));-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border:1px solid var(--input-border);border-radius:28px;padding:.75rem .95rem .75rem 1.5rem;box-shadow:0 12px 32px #00000029,0 0 0 1px #ffffff0d;transition:all .25s cubic-bezier(.16,1,.3,1)}.input-container:focus-within{border-color:#6366f199;box-shadow:0 14px 40px #00000040,0 0 24px #6366f138}.chat-input{flex:1;background:transparent;border:none;color:var(--text-main);font-size:1.05rem;font-weight:600;outline:none;resize:none;max-height:120px;font-family:inherit}.send-btn{background:linear-gradient(135deg,#6366f1,#8b5cf6);border:none;color:#fff;width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:transform .2s cubic-bezier(.16,1,.3,1),box-shadow .2s ease,opacity .2s;box-shadow:0 4px 16px #6366f166}.send-btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}.send-btn:not(:disabled):hover{transform:scale(1.08);box-shadow:0 6px 22px #6366f199}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000bf;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:100}.modal-card{background:var(--modal-bg);border:1px solid var(--card-border);color:var(--text-main);padding:2.25rem;border-radius:18px;width:90%;max-width:420px;text-align:center;box-shadow:0 16px 40px #0006}.modal-card h2{margin-bottom:.5rem;font-size:1.45rem;color:var(--text-main);font-weight:700}.modal-card p{color:var(--text-muted);font-size:.95rem;margin-bottom:1.5rem;line-height:1.5;font-weight:600}.name-input{width:100%;padding:.85rem 1.15rem;border-radius:10px;border:1px solid var(--input-border);background:var(--input-bg);color:var(--text-main);font-size:1.05rem;font-weight:600;outline:none;margin-bottom:1.25rem}.name-input:focus{border-color:#818cf8}.submit-btn{width:100%;padding:.85rem;border-radius:10px;border:none;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;font-weight:700;font-size:1.05rem;cursor:pointer;transition:opacity .2s}.submit-btn:hover{opacity:.9}@media (max-width: 768px){body,.app-container,.main-content{height:100dvh}.sidebar-backdrop.open{display:block}.sidebar{position:fixed;top:0;left:0;bottom:0;width:280px;height:100dvh;transform:translate(-100%);box-shadow:4px 0 24px #0006}.sidebar.open{transform:translate(0)}.sidebar-close-btn,.mobile-menu-btn{display:flex;align-items:center;justify-content:center}.top-bar{padding:.65rem .85rem;min-height:52px}.top-bar-title{font-size:1.05rem}.top-bar-logo{width:24px;height:24px}.landing-view{justify-content:flex-start;padding:.65rem .65rem .5rem;overflow-y:auto;flex:1}.greeting-title{font-size:1.45rem;margin-top:.2rem;margin-bottom:.2rem}.greeting-subtitle{font-size:.88rem;margin-bottom:.85rem}.suggestions-grid{grid-template-columns:repeat(2,1fr);gap:.5rem;margin-bottom:.5rem}.suggestion-card{padding:.6rem .7rem;gap:.25rem;border-radius:10px}.card-category{font-size:.68rem;gap:.25rem}.card-text{font-size:.82rem;line-height:1.3}.chat-container{padding:.85rem .75rem;gap:1rem;flex:1}.message-bubble{max-width:94%;gap:.65rem}.message-content{font-size:.94rem;padding:.75rem .9rem}.input-container-wrapper{padding:0 .65rem calc(.65rem + env(safe-area-inset-bottom,0px))}.input-container{padding:.45rem .55rem .45rem .85rem}}