.message-input-container{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:800px;padding:0 1rem max(1rem,env(safe-area-inset-bottom));z-index:100;background:none}.model-selector-row{position:relative;margin-bottom:6px;display:flex;align-items:center;justify-content:flex-start;gap:6px}.model-add-btn{width:28px;height:28px;padding:0;border:1px dashed rgb(var(--border-heavy));border-radius:16px;background:transparent;color:rgb(var(--text-tertiary));cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:all var(--dur-fast) ease}.model-add-btn:hover{border-style:solid;border-color:var(--accent-color);color:var(--accent-color);background:rgba(var(--accent-rgb),.08)}.model-add-btn:active{transform:scale(.94)}.model-select-btn{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;background:rgb(var(--bg-elevated));border:1px solid rgb(var(--border-light));border-radius:16px;cursor:pointer;transition:all var(--dur-fast) ease;color:rgb(var(--text-secondary));font-family:inherit;font-size:.78rem;font-weight:500;white-space:nowrap;-webkit-appearance:none;-moz-appearance:none;appearance:none;outline:none}.model-select-btn:disabled{opacity:.6;cursor:default}.model-select-btn-caret{display:inline-flex;align-items:center;flex-shrink:0;opacity:.7}.model-select-btn:hover{background:rgb(var(--surface-hover));border-color:rgb(var(--border-heavy));color:rgb(var(--text-primary))}.model-select-btn:active{transform:scale(.97)}.model-select-btn-icon{width:20px;height:20px;border-radius:4px;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0;background:linear-gradient(135deg,#555,#333)}.model-select-btn-icon svg{width:12px;height:12px}.model-select-btn-name{max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.model-dropdown-arrow{transition:transform var(--dur-normal) 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ease;color:rgb(var(--text-primary));font-size:.82rem}.model-dropdown-option:hover{background:rgb(var(--surface-hover))}.model-dropdown-option.selected{background:rgba(var(--accent-rgb),.08)}.model-option-icon-wrap{width:22px;height:22px;border-radius:4px;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0;background:linear-gradient(135deg,#555,#333)}.model-option-icon-wrap svg{width:12px;height:12px}.model-option-label{flex:1;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.model-tool-indicator{font-size:.65rem;flex-shrink:0}.model-option-check{color:var(--accent-color);flex-shrink:0;margin-left:auto}.model-dropdown-empty{padding:.75rem 1rem;text-align:center;color:rgb(var(--text-tertiary));font-size:.78rem}.message-input-container .input-wrapper{position:relative;background:rgb(var(--bg-elevated));border:1px solid rgb(var(--border-light));border-radius:var(--radius-lg);box-shadow:var(--shadow-md);transition:all var(--dur-normal) var(--spring-smooth);overflow:hidden}.message-input-container:focus-within .input-wrapper,.message-input-container.focused .input-wrapper{border-color:rgba(var(--accent-rgb),.35);box-shadow:var(--shadow-md),0 0 0 2px rgba(var(--accent-rgb),.06)}.message-input-container.expanded .input-wrapper{border-radius:var(--radius-md)}.message-input{width:100%;padding:12px 104px 12px 14px;border:none;background:transparent;color:rgb(var(--text-primary));font-size:.9rem;font-family:Inter,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;resize:none;min-height:44px;max-height:200px;line-height:1.55;outline:none;scrollbar-width:none;-ms-overflow-style:none;transition:all var(--dur-normal) var(--spring-smooth);letter-spacing:-.01em}.message-input::-webkit-scrollbar{display:none}.message-input::placeholder{color:rgb(var(--text-tertiary));opacity:.5;transition:opacity var(--dur-normal) 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fireball-glow{0%{opacity:.4;transform:scale(.9)}to{opacity:.8;transform:scale(1.15)}}.lego-builder{display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:.75rem 1rem;margin:.5rem 0}.lego-assembly{display:flex;gap:4px;align-items:flex-end;height:40px}.lego-brick{position:relative;width:36px;height:24px;border-radius:3px;background:var(--brick-color);display:flex;align-items:center;justify-content:center;transition:all .3s cubic-bezier(.34,1.56,.64,1);opacity:.2;transform:translateY(12px) scale(.7)}.lego-brick.assembled{opacity:1;transform:translateY(0) scale(1);box-shadow:inset 0 -2px #00000026,inset 0 2px #fff3,0 2px 4px #00000026}.lego-brick.waiting{opacity:.15;transform:translateY(12px) scale(.7)}.lego-stud{position:absolute;top:-5px;left:50%;transform:translate(-50%);width:10px;height:6px;border-radius:3px 3px 1px 1px;background:var(--brick-color);box-shadow:inset 0 1px #ffffff40}.lego-stud-bottom{top:auto;bottom:-3px;border-radius:1px 1px 3px 3px;box-shadow:inset 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