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rgba(13,148,136,.1)}.chat-input::placeholder{color:var(--h-text-muted)}.chat-input-btn{width:40px;height:40px;border-radius:var(--h-radius-full);border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all var(--h-transition-fast);flex-shrink:0;font-size:18px}.chat-input-btn.send{background:var(--h-primary);color:white;box-shadow:var(--h-shadow-sm)}.chat-input-btn.send:hover{background:var(--h-primary-dark);transform:scale(1.05)}.chat-input-btn.send:disabled{opacity:.4;cursor:not-allowed;transform:none}.chat-input-btn.attach{background:transparent;color:var(--h-text-muted)}.chat-input-btn.attach:hover{background:var(--h-bg-alt);color:var(--h-text)}.chat-file-preview{display:flex;align-items:center;gap:var(--h-space-2);padding:var(--h-space-2) var(--h-space-3);background:var(--h-primary-50);border:1px solid var(--h-primary-100);border-radius:var(--h-radius);margin-bottom:var(--h-space-2);animation:fadeIn .2s ease-out}[data-theme=dark] 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