/* Compound Interest Calculator Styles */
:root {
    --primary-color: #4a6bff;
    --primary-hover: #3a5bef;
    --secondary-color: #2ecc71;
    --tertiary-color: #f39c12;
    --danger-color: #e74c3c;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #e9ecef;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 30px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --border-radius: 8px;
    --border-radius-lg: 12px;
}

/* Base Styles */
.compound-interest-calculator {
    padding: 20px 0;
    background: linear-gradient(135deg, #f5f9ff 0%, #e6f0ff 100%);
    min-height: 100vh;
    box-sizing: border-box;
}

.tool-header {
    text-align: center;
    margin-bottom: 30px;
    padding: 0 10px;
}

.tool-header h1 {
    font-size: 2rem;
    color: var(--text-primary);
    margin: 0 0 10px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
    line-height: 1.3;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.breadcrumb {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 15px;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

/* Calculator Layout */
.calculator-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 10px;
    width: 100%;
    box-sizing: border-box;
}

.calculator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 30px;
    width: 100%;
    box-sizing: border-box;
}

/* Input Section */
.calculator-inputs {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: 20px 15px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    width: 100%;
    box-sizing: border-box;
}

.calculator-inputs:hover {
    box-shadow: var(--shadow-hover);
}

.calculator-inputs h2,
.calculator-results h2,
.yearly-breakdown h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.calculator-inputs h2 i,
.calculator-results h2 i,
.yearly-breakdown h2 i {
    color: var(--primary-color);
}

/* Input Groups */
.input-group {
    margin-bottom: 25px;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.input-with-icon {
    position: relative;
    margin-bottom: 10px;
}

.input-with-icon i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.form-control {
    width: 100%;
    padding: 14px 15px 14px 45px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background-color: var(--bg-light);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(74, 107, 255, 0.1);
}

select.form-control {
    padding: 14px 15px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237f8c8d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 12px;
}

/* Range Input */
.input-range {
    width: 100%;
    padding: 0 5px;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    outline: none;
    margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(74, 107, 255, 0.2);
}

input[type="range"]:focus::-webkit-slider-thumb {
    box-shadow: 0 0 0 4px rgba(74, 107, 255, 0.3);
}

/* Advanced Options */
.advanced-options {
    margin: 30px 0;
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
}

.btn-advance {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    padding: 10px 15px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    margin-bottom: 20px;
}

.btn-advance:hover {
    background-color: rgba(74, 107, 255, 0.05);
    border-color: var(--primary-color);
}

.advanced-panel {
    display: none;
    background-color: var(--bg-light);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 15px;
    animation: fadeIn 0.3s ease-in-out;
}

.advanced-panel.show {
    display: block;
}

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

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.btn-calculate,
.btn-reset,
.btn-export {
    flex: 1;
    padding: 14px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-calculate {
    background-color: var(--primary-color);
    color: white;
}

.btn-calculate:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-reset {
    background-color: var(--bg-light);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-reset:hover {
    background-color: #e9ecef;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* Results Section */
.calculator-results {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.calculator-results:hover {
    box-shadow: var(--shadow-hover);
}

.result-summary {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.result-card {
    background: var(--bg-light);
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: var(--transition);
}

.result-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-sm);
}

.result-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(74, 107, 255, 0.1), rgba(46, 204, 113, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.result-content {
    flex: 1;
}

.result-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

/* Chart Container */
.chart-container {
    width: 100%;
    height: 300px;
    margin: 30px 0;
    position: relative;
}

/* Detailed Results */
.detailed-results {
    background: var(--bg-light);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-top: 30px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.result-row:last-child {
    border-bottom: none;
}

.result-label {
    font-weight: 500;
    color: var(--text-secondary);
}

.result-amount {
    font-weight: 600;
    color: var(--text-primary);
}

/* Yearly Breakdown */
.yearly-breakdown {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-md);
    margin-bottom: 40px;
    transition: var(--transition);
}

.yearly-breakdown:hover {
    box-shadow: var(--shadow-hover);
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
    margin: 20px 0;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-light);
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

tbody tr:hover {
    background-color: rgba(74, 107, 255, 0.03);
}

/* Export Buttons */
.export-buttons {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.btn-export {
    flex: 1;
    padding: 12px 15px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    background-color: var(--bg-light);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-export:hover {
    background-color: #e9ecef;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-export i {
    font-size: 1.1rem;
}

/* Unique Features Section */
.unique-features {
    margin: 60px 0 40px;
}

.unique-features h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 15px;
}

.unique-features h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.feature-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 30px 25px;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.8rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* SEO Content */
.seo-content {
    background: var(--bg-white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
    margin: 40px 0;
    line-height: 1.7;
}

.seo-content h2 {
    color: var(--text-primary);
    margin: 40px 0 20px;
    font-size: 1.8rem;
    position: relative;
    padding-bottom: 10px;
}

.seo-content h2:first-child {
    margin-top: 0;
}

.seo-content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.seo-content h3 {
    color: var(--text-primary);
    margin: 35px 0 15px;
    font-size: 1.4rem;
}

.seo-content p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.seo-content ul, 
.seo-content ol {
    margin: 15px 0 20px 20px;
    color: var(--text-secondary);
}

.seo-content li {
    margin-bottom: 10px;
}

/* FAQ Section */
.faq-item {
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item h3 {
    margin: 0;
    padding: 18px 20px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    background-color: var(--bg-light);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-item h3:hover {
    background-color: #f1f3f5;
}

.faq-item h3 i {
    transition: var(--transition);
}

.faq-item h3.active i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease;
    padding: 0 20px;
}

.faq-answer p, 
.faq-answer ul, 
.faq-answer ol {
    margin: 15px 0;
}

/* Responsive Styles */
@media (max-width: 1199.98px) {
    .calculator-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .result-summary {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991.98px) {
    .tool-header h1 {
        font-size: 2.2rem;
    }
    
    .calculator-inputs,
    .calculator-results,
    .yearly-breakdown,
    .seo-content {
        padding: 25px;
    }
    
    .feature-card {
        padding: 25px 20px;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .calculator-grid {
        grid-template-columns: 1fr 1.1fr;
        gap: 25px;
    }
    
    .calculator-inputs,
    .calculator-results {
        padding: 25px 20px;
    }
    
    .action-buttons,
    .export-buttons {
        flex-direction: row;
        gap: 15px;
    }
    
    .btn-calculate,
    .btn-reset,
    .btn-export {
        width: auto;
    }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .calculator-grid {
        grid-template-columns: 1fr 1.2fr;
        gap: 30px;
    }
    
    .calculator-container {
        padding: 0 20px;
    }
    
    .tool-header h1 {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .result-summary {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .calculator-container {
        max-width: 1400px;
        padding: 0 30px;
    }
    
    .calculator-inputs,
    .calculator-results {
        padding: 30px 25px;
    }
    
    .features-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .tool-header h1 {
        font-size: 1.8rem;
    }
    
    .features-grid,
    .result-summary {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .action-buttons,
    .export-buttons {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .btn-calculate,
    .btn-reset,
    .btn-export {
        flex: 1 0 calc(50% - 10px);
        min-width: 0;
    }
}

/* Extra small devices (portrait phones, less than 576px) */
@media (max-width: 575.98px) {
    .tool-header h1 {
        font-size: 1.6rem;
        margin-bottom: 8px;
    }
    
    .subtitle {
        font-size: 1rem;
        margin-bottom: 15px;
    }
    
    .calculator-inputs,
    .calculator-results,
    .yearly-breakdown {
        padding: 18px 12px;
        border-radius: 10px;
    }
    
    .features-grid,
    .result-summary {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .action-buttons,
    .export-buttons {
        flex-direction: column;
        gap: 10px;
    }
    
    .btn-calculate,
    .btn-reset,
    .btn-export {
        width: 100%;
        padding: 12px 10px;
        font-size: 0.95rem;
    }
    
    .form-control {
        padding: 12px 12px 12px 40px;
        font-size: 0.95rem;
    }
    
    .input-with-icon i {
        left: 12px;
    }
    
    .result-value {
        font-size: 1.3rem;
    }
    
    .seo-content {
        padding: 20px 15px;
    }
    
    .seo-content h2 {
        font-size: 1.4rem;
        margin: 30px 0 15px;
    }
    
    .seo-content h3 {
        font-size: 1.2rem;
        margin: 25px 0 12px;
    }
    
    th, td {
        padding: 10px 8px;
        font-size: 0.85rem;
    }
}
}

@media (max-width: 575.98px) {
    .tool-header h1 {
        font-size: 1.6rem;
    }
    
    .calculator-inputs,
    .calculator-results,
    .yearly-breakdown {
        padding: 20px 15px;
    }
    
    .result-card {
        padding: 15px;
    }
    
    .result-icon {
        width: 45px;
        height: 45px;
        font-size: 1rem;
    }
    
    .result-value {
        font-size: 1.3rem;
    }
    
    .form-control {
        padding: 12px 15px 12px 40px;
    }
    
    .input-with-icon i {
        left: 12px;
    }
    
    .seo-content h2 {
        font-size: 1.4rem;
    }
    
    .seo-content h3 {
        font-size: 1.2rem;
    }
    
    th, td {
        padding: 10px 12px;
        font-size: 0.9rem;
    }
}

@media (max-width: 399.98px) {
    .tool-header h1 {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .result-value {
        font-size: 1.2rem;
    }
    
    .form-control {
        font-size: 0.95rem;
    }
    
    .feature-card {
        padding: 20px 15px;
    }
    
    .feature-icon {
        width: 50px;
        height: 50px;
        font-size: 1.3rem;
    }
    
    .seo-content {
        padding: 20px 15px;
    }
    
    .seo-content h2 {
        font-size: 1.3rem;
    }
    
    .seo-content h3 {
        font-size: 1.1rem;
    }
}