.calculator-card {
            background: white;
            border-radius: 16px;
            padding: 0rem;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
            margin: 1rem 0;
        }
        .input-group-custom {
            margin-bottom: 0.5rem;
        }
        .input-group-custom label {
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            display: block;
        }
        .input-group-custom .input-wrapper {
            position: relative;
        }
        .input-group-custom .input-wrapper i {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--primary-color);
            opacity: 0.7;
        }
        .input-group-custom input {
            width: 100%;
            padding: 12px 12px 12px 40px;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            font-size: 1rem;
            transition: border-color 0.2s;
        }
        .input-group-custom input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .input-group-custom select {
            width: 100%;
            padding: 12px;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            font-size: 1rem;
            background: white;
            cursor: pointer;
        }
        .input-group-custom select:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        .result-box {
            background: linear-gradient(135deg, #f0f7fa 0%, #e8f4fd 100%);
            border-radius: 12px;
            padding: 1.5rem;
            text-align: center;
            margin: 1.5rem 0;
        }
        .result-main {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1.2;
        }
        .result-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .result-breakdown {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(0,0,0,0.05);
        }
        .breakdown-item {
            text-align: center;
        }
        .breakdown-value {
            font-size: 1.3rem;
            font-weight: 600;
            color: #2c3e50;
        }
        .breakdown-label {
            font-size: 0.85rem;
            color: #7f8c8d;
        }
        .compound-note {
            background-color: #fff8e7;
            border-left: 4px solid #f39c12;
            padding: 1rem;
            border-radius: 8px;
            margin: 1rem 0;
            font-size: 0.95rem;
        }
        .method-tabs {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        .method-tab {
            padding: 0.75rem 1.5rem;
            border: 2px solid var(--border-color);
            border-radius: 30px;
            background: white;
            color: var(--text-muted);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
        }
        .method-tab:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }
        .method-tab.active {
            background: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
        }
        .math-derivation {
            background: #f8f9fa;
            padding: 1.5rem;
            border-radius: 12px;
            font-family: 'Courier New', monospace;
            font-size: 1.1rem;
            text-align: center;
            margin: 1rem 0;
        }
        .example-btn i {
            margin-right: 4px;
        }
        .privacy-badge {
            background-color: #d4edda;
            color: #155724;
            padding: 0.5rem 1rem;
            border-radius: 30px;
            display: inline-block;
            margin-top: 0.5rem;
        }
        .verified-badge {
            display: inline-block;
            background-color: #28a745;
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
        }@media (max-width: 768px) {
 .method-tab{padding:0.5rem}
    }