.matrix-calc .card,.matrix-classifier .card,.matrix-calc .tool-card,.matrix-classifier .tool-card{background:var(--bg-primary,#fff);border:1px solid var(--border,#e2e8f0);border-radius:0.75rem;margin-bottom:1rem;overflow:hidden}.matrix-calc .card-header,.matrix-classifier .card-header,.matrix-calc .tool-card-header,.matrix-classifier .tool-card-header{background:var(--tool-gradient,linear-gradient(135deg,#3b82f6 0%,#1d4ed8 100%));color:#fff;padding:0.6rem 0.9rem;font-weight:600;font-size:0.9375rem}.matrix-calc .card-body,.matrix-classifier .card-body,.matrix-calc .tool-card-body,.matrix-classifier .tool-card-body{padding:0.75rem 1rem}.matrix-calc .form-group,.matrix-classifier .form-group{margin-bottom:0.875rem}.matrix-calc .form-control,.matrix-classifier .form-control,.matrix-calc .tool-input,.matrix-classifier .tool-input{width:100%;padding:0.5rem 0.75rem;font-size:0.875rem;border:1.5px solid var(--border,#e2e8f0);border-radius:0.5rem;background:var(--bg-primary,#fff);color:var(--text-primary,#0f172a);font-family:inherit}.matrix-calc .form-control:focus,.matrix-classifier .form-control:focus,.matrix-calc .tool-input:focus,.matrix-classifier .tool-input:focus{outline:none;border-color:var(--tool-primary,#3b82f6);box-shadow:0 0 0 3px rgba(59,130,246,0.15)}.matrix-calc textarea.form-control,.matrix-calc textarea.tool-input{resize:vertical;font-family:var(--font-mono,monospace)}.matrix-calc .text-muted{color:var(--text-muted,#94a3b8)}.matrix-calc small.text-muted,.matrix-calc .tool-form-hint{font-size:0.75rem;margin-top:0.25rem;display:block;color:var(--text-secondary,#64748b)}.matrix-calc .btn,.matrix-classifier .btn,.matrix-calc .tool-action-btn,.matrix-classifier .tool-action-btn{display:inline-flex;align-items:center;justify-content:center;padding:0.5rem 1rem;font-size:0.875rem;font-weight:500;border-radius:0.5rem;cursor:pointer;border:none;transition:opacity 0.15s,transform 0.15s}.matrix-calc .btn-primary,.matrix-calc .tool-action-btn{background:var(--tool-gradient,linear-gradient(135deg,#3b82f6 0%,#1d4ed8 100%));color:#fff}.matrix-calc .btn-outline-secondary,.matrix-calc .btn-outline-info,.matrix-calc .btn-outline-primary,.matrix-calc .btn-outline-success{background:transparent;border:1.5px solid var(--border,#e2e8f0);color:var(--text-secondary,#475569)}.matrix-calc .btn-outline-primary{border-color:var(--tool-primary);color:var(--tool-primary)}.matrix-calc .btn-outline-info{border-color:var(--info,#3b82f6);color:var(--info)}.matrix-calc .btn-outline-success{border-color:var(--success,#10b981);color:var(--success)}.matrix-calc .btn:hover{opacity:0.9}.matrix-calc .btn-sm{padding:0.375rem 0.75rem;font-size:0.8125rem}.matrix-calc .btn-block{width:100%;display:block}.matrix-calc .d-flex{display:flex}.matrix-calc .flex-wrap{flex-wrap:wrap}.matrix-calc .align-items-center{align-items:center}.matrix-calc .align-items-start{align-items:flex-start}.matrix-calc .justify-content-between{justify-content:space-between}.matrix-calc .mr-1{margin-right:0.25rem}.matrix-calc .mr-2{margin-right:0.5rem}.matrix-calc .ml-1{margin-left:0.25rem}.matrix-calc .mb-1{margin-bottom:0.25rem}.matrix-calc .mb-2{margin-bottom:0.5rem}.matrix-calc .mb-3{margin-bottom:1rem}.matrix-calc .mt-2{margin-top:0.5rem}.matrix-calc .mx-1{margin-left:0.25rem;margin-right:0.25rem}.matrix-calc .custom-control{display:flex;align-items:center;gap:0.5rem;cursor:pointer;margin-bottom:0.5rem}.matrix-calc .custom-control-input{width:1.125rem;height:1.125rem;accent-color:var(--tool-primary)}.matrix-calc .custom-control-label{font-size:0.875rem;color:var(--text-secondary)}.matrix-calc .custom-switch .custom-control-input{width:2.5rem}.matrix-calc .text-danger{color:var(--error,#ef4444)}.matrix-calc .text-center{text-align:center}.matrix-calc .alert-danger{padding:1rem;background:rgba(239,68,68,0.1);border:1px solid var(--error);border-radius:0.5rem;color:var(--error)}.matrix-calc .row{display:flex;flex-wrap:wrap;margin:0-0.75rem}.matrix-calc .col-6{flex:0 0 50%;padding:0 0.75rem}.matrix-calc .col-lg-4{flex:0 0 100%;padding:0 0.75rem}.matrix-calc .col-lg-8{flex:0 0 100%;padding:0 0.75rem}@media (min-width:992px){.matrix-calc .col-lg-4{flex:0 0 33.333%}.matrix-calc .col-lg-8{flex:0 0 66.666%}}@media (min-width:768px){.matrix-calc .col-md-12{flex:0 0 100%}}.matrix-calc .container{max-width:100%;padding:0 1rem}.matrix-calc .mt-4{margin-top:1.5rem}.matrix-calc .mt-5{margin-top:2rem}.matrix-calc .h5{font-size:1.25rem}.matrix-calc .h6{font-size:1rem}.matrix-calc .mb-0{margin-bottom:0}