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1px 2px #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--shadow-glow:0 0 15px #0d8bf114;--transition-fast:.15s cubic-bezier(.4, 0, .2, 1);--transition-base:.25s cubic-bezier(.4, 0, .2, 1);--transition-slow:.4s cubic-bezier(.4, 0, .2, 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#0d8bf11a}.chat-input__form--disabled{opacity:.5;pointer-events:none}.chat-input__textarea{color:var(--text-primary);resize:none;background:0 0;border:none;outline:none;flex:1;min-height:24px;max-height:150px;padding:6px 0;font-family:inherit;font-size:.875rem;line-height:1.5}.chat-input__textarea::placeholder{color:var(--input-placeholder)}.chat-input__actions{flex-shrink:0;align-items:center;gap:4px;display:flex}.chat-input__btn{border-radius:var(--radius-md);cursor:pointer;width:36px;height:36px;transition:all var(--transition-fast);color:var(--text-tertiary);background:0 0;border:none;justify-content:center;align-items:center;display:flex}.chat-input__btn:hover{background:var(--bg-hover);color:var(--text-primary)}.chat-input__btn--send{background:linear-gradient(135deg, var(--primary-600), var(--primary-500));color:var(--text-on-primary);box-shadow:var(--shadow-sm)}.chat-input__btn--send:hover{background:linear-gradient(135deg, var(--primary-500), var(--primary-400));box-shadow:var(--shadow-md), var(--shadow-glow)}.chat-input__btn--send:disabled{background:var(--bg-tertiary);color:var(--text-muted);cursor:not-allowed;box-shadow:none}.chat-input__btn--stop{background:var(--error-600);color:#fff}.chat-input__btn--stop:hover{background:var(--error-500)}.chat-input__preview{flex-wrap:wrap;gap:8px;padding:0 0 8px;display:flex}.chat-input__preview-item{border-radius:var(--radius-md);border:1px solid var(--border-default);width:64px;height:64px;position:relative;overflow:hidden}.chat-input__preview-img{object-fit:cover;width:100%;height:100%}.chat-input__preview-remove{border-radius:var(--radius-full);color:#fff;cursor:pointer;width:18px;height:18px;transition:all var(--transition-fast);background:#000000b3;border:none;justify-content:center;align-items:center;font-size:10px;display:flex;position:absolute;top:2px;right:2px}.chat-input__preview-remove:hover{background:var(--error-500)}.chat-input__hint{text-align:center;color:var(--text-muted);margin-top:8px;font-size:.6875rem}.chat-input__limit-warning{text-align:center;color:var(--warning-500);border-radius:var(--radius-sm);background:#ff980014;border:1px solid #ff980033;margin-top:8px;padding:6px 12px;font-size:.75rem}.chat-input__limit-reached{text-align:center;color:var(--error-500);border-radius:var(--radius-md);background:#ef535014;border:1px solid #ef535033;margin-top:8px;padding:10px 16px;font-size:.8125rem}.chat-input__file-input{display:none}@media (max-width:768px){.sidebar{z-index:50;box-shadow:var(--shadow-lg);position:fixed;top:0;bottom:0;left:0}.sidebar--collapsed{transform:translate(-100%)}.sidebar-overlay{z-index:45;background:#00000080;display:none;position:fixed;inset:0}.sidebar-overlay--visible{display:block}.chat-message__content{max-width:85%}.welcome__suggestions{grid-template-columns:1fr}.header__quota{display:none}}@media (max-width:480px){.header{padding:0 12px}.chat-container{padding:12px}.chat-input{padding:10px 12px 14px}.chat-message__bubble{padding:8px 12px;font-size:.8125rem}}