/**
 * Percentage Calculator - Modern Design
 * Clean, modern UI with smooth animations
 */

/* Main Container */
.percentage-calculator-tool {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Tool Header */
.percentage-calculator-tool .tool-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.percentage-calculator-tool .tool-header h3 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0 0 0.75rem 0;
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.percentage-calculator-tool .tool-header p {
    font-size: 1.125rem;
    color: #64748b;
    margin: 0;
}

/* Calculator Container */
.percentage-calculator-tool .calculator-container {
    background: #ffffff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
    border: 1px solid #e2e8f0;
    margin-bottom: 2rem;
}

/* Tabs */
.percentage-calculator-tool .calculation-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    background: #f8fafc;
    padding: 0.5rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    overflow-x: auto;
}

.percentage-calculator-tool .tab-btn {
    flex: 1;
    min-width: 140px;
    padding: 0.875rem 1.25rem;
    border: none;
    background: transparent;
    border-radius: 10px;
    font-size: 0.9375rem;
    font-weight: 600;
    color: #64748b;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.percentage-calculator-tool .tab-btn:hover {
    background: #e2e8f0;
    color: #334155;
    transform: translateY(-1px);
}

.percentage-calculator-tool .tab-btn.active {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(67, 233, 123, 0.3);
}

/* Tab Content */
.percentage-calculator-tool .tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.percentage-calculator-tool .tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Input Section */
.percentage-calculator-tool .input-section {
    margin-bottom: 2rem;
}

.percentage-calculator-tool .input-group {
    margin-bottom: 1.5rem;
}

.percentage-calculator-tool .input-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: #334155;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.percentage-calculator-tool .form-control {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    background: #ffffff;
    color: #0f172a;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.percentage-calculator-tool .form-control:focus {
    outline: none;
    border-color: #43e97b;
    box-shadow: 0 0 0 3px rgba(67, 233, 123, 0.1);
    background: #f8fffe;
}

.percentage-calculator-tool .form-control::placeholder {
    color: #94a3b8;
}

.percentage-calculator-tool select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

/* Action Buttons */
.percentage-calculator-tool .action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.percentage-calculator-tool .btn {
    flex: 1;
    min-width: 140px;
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.percentage-calculator-tool .btn-primary {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(67, 233, 123, 0.3);
}

.percentage-calculator-tool .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(67, 233, 123, 0.4);
}

.percentage-calculator-tool .btn-primary:active {
    transform: translateY(0);
}

.percentage-calculator-tool .btn-secondary {
    background: #f1f5f9;
    color: #475569;
    border: 2px solid #e2e8f0;
}

.percentage-calculator-tool .btn-secondary:hover {
    background: #e2e8f0;
    color: #334155;
    transform: translateY(-1px);
}

/* Result Section */
.percentage-calculator-tool .result-section {
    margin-top: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f0fdf4 0%, #ecfdf5 100%);
    border-radius: 12px;
    border: 2px solid #bbf7d0;
}

.percentage-calculator-tool .result-section h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: #166534;
    margin: 0 0 1rem 0;
}

.percentage-calculator-tool #basic-results,
.percentage-calculator-tool #change-results,
.percentage-calculator-tool #discount-results,
.percentage-calculator-tool #markup-results,
.percentage-calculator-tool #ratio-results {
    font-size: 1.5rem;
    font-weight: 700;
    color: #15803d;
    line-height: 1.6;
}

.percentage-calculator-tool .result-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid #bbf7d0;
}

.percentage-calculator-tool .result-item:last-child {
    border-bottom: none;
}

.percentage-calculator-tool .result-label {
    font-size: 0.875rem;
    color: #166534;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.percentage-calculator-tool .result-value {
    font-size: 1.25rem;
    color: #15803d;
    font-weight: 700;
}

/* Quick Calculations */
.percentage-calculator-tool .quick-calculations {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #e2e8f0;
}

.percentage-calculator-tool .quick-calculations h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #334155;
    margin: 0 0 1rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.percentage-calculator-tool .quick-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.75rem;
}

.percentage-calculator-tool .quick-item {
    padding: 1rem;
    background: #f8fafc;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.percentage-calculator-tool .quick-item:hover {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    border-color: #43e97b;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(67, 233, 123, 0.3);
}

.percentage-calculator-tool .quick-item:hover .quick-label {
    color: #ffffff;
    font-weight: 700;
}

.percentage-calculator-tool .quick-label {
    font-size: 1rem;
    font-weight: 600;
    color: #475569;
    transition: all 0.3s ease;
}

/* Calculation History */
.percentage-calculator-tool .calculation-history {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid #e2e8f0;
}

.percentage-calculator-tool .calculation-history h4 {
    font-size: 1rem;
    font-weight: 700;
    color: #334155;
    margin: 0 0 1rem 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.percentage-calculator-tool #history-list {
    max-height: 300px;
    overflow-y: auto;
}

.percentage-calculator-tool .history-item {
    padding: 0.875rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: #475569;
}

.percentage-calculator-tool .history-item:last-child {
    margin-bottom: 0;
}

/* Tool Info */
.percentage-calculator-tool .tool-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.percentage-calculator-tool .info-section {
    background: #ffffff;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.percentage-calculator-tool .info-section h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0 0 1rem 0;
}

.percentage-calculator-tool .info-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.percentage-calculator-tool .info-section li {
    padding: 0.625rem 0;
    color: #475569;
    font-size: 0.9375rem;
    line-height: 1.6;
    border-bottom: 1px solid #f1f5f9;
}

.percentage-calculator-tool .info-section li:last-child {
    border-bottom: none;
}

.percentage-calculator-tool .info-section li strong {
    color: #0f172a;
    font-weight: 600;
}

/* Status Messages */
.percentage-calculator-tool .status-message {
    padding: 0.875rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.percentage-calculator-tool .status-message.success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.percentage-calculator-tool .status-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Responsive Design */
@media (max-width: 768px) {
    .percentage-calculator-tool {
        padding: 1rem 0.5rem;
    }
    
    .percentage-calculator-tool .tool-header h3 {
        font-size: 2rem;
    }
    
    .percentage-calculator-tool .calculator-container {
        padding: 1.5rem;
    }
    
    .percentage-calculator-tool .calculation-tabs {
        flex-direction: column;
    }
    
    .percentage-calculator-tool .tab-btn {
        min-width: 100%;
    }
    
    .percentage-calculator-tool .action-buttons {
        flex-direction: column;
    }
    
    .percentage-calculator-tool .btn {
        min-width: 100%;
    }
    
    .percentage-calculator-tool .quick-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
    
    .percentage-calculator-tool .tool-info {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .percentage-calculator-tool .tool-header h3 {
        font-size: 1.75rem;
    }
    
    .percentage-calculator-tool .tool-header p {
        font-size: 1rem;
    }
    
    .percentage-calculator-tool .calculator-container {
        padding: 1rem;
    }
}