* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

main {
    padding: 40px;
}

.calculator-section h2,
.results-section h2 {
    color: #333;
    margin-bottom: 30px;
    font-size: 2rem;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #555;
    font-weight: 600;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.calculate-btn {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    margin-top: 10px;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.calculate-btn:active {
    transform: translateY(0);
}

.results-section {
    margin-top: 40px;
    padding-top: 40px;
    border-top: 2px solid #e0e0e0;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.result-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease;
}

.result-card:hover {
    transform: translateY(-5px);
}

.result-card h3 {
    color: #555;
    font-size: 0.9rem;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
}

.details-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    margin-top: 30px;
}

.details-section h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: 15px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.detail-label {
    color: #666;
    font-weight: 500;
}

.detail-value {
    color: #333;
    font-weight: 700;
}

.chart-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    margin-top: 30px;
}

.tab-buttons {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    border-bottom: 2px solid #e5e7eb;
}

.tab-btn {
    padding: 12px 24px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: #6b7280;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    color: #667eea;
}

.tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.table-container {
    overflow-x: auto;
    margin-top: 20px;
}

#yearlyTable {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
}

#yearlyTable thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

#yearlyTable th {
    padding: 12px 16px;
    text-align: right;
    font-weight: 600;
}

#yearlyTable th:first-child {
    text-align: left;
}

#yearlyTable tbody tr {
    border-bottom: 1px solid #e5e7eb;
    transition: background-color 0.2s;
}

#yearlyTable tbody tr:hover {
    background-color: #f9fafb;
}

#yearlyTable td {
    padding: 12px 16px;
    text-align: right;
}

#yearlyTable td:first-child {
    text-align: left;
    font-weight: 600;
    color: #374151;
}

#yearlyTable .positive {
    color: #10b981;
}

#yearlyTable .negative {
    color: #ef4444;
}

.chart-section h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

#yearlyChart {
    max-height: 400px;
}

.feedback-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    margin-top: 30px;
}

.feedback-section h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.3rem;
    text-align: center;
}

.feedback-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 20px;
}

.feedback-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 15px 30px;
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    color: #555;
    min-width: 120px;
}

.feedback-btn:hover {
    border-color: #667eea;
    background: #f0f4ff;
    transform: translateY(-2px);
}

.feedback-btn.selected {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.feedback-btn .arrow {
    font-size: 1.5rem;
    font-weight: bold;
}

.feedback-text-section {
    margin-top: 20px;
}

.feedback-text-section textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.95rem;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.feedback-text-section textarea:focus {
    outline: none;
    border-color: #667eea;
}

.submit-feedback-btn {
    margin-top: 10px;
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: transform 0.2s ease;
}

.submit-feedback-btn:hover {
    transform: translateY(-2px);
}

.feedback-thanks {
    text-align: center;
    padding: 15px;
    background: #d1fae5;
    border-radius: 8px;
    color: #065f46;
    font-weight: 600;
}

.feedback-thanks p {
    margin: 0;
}

footer {
    background: #f8f9fa;
    padding: 20px;
    text-align: center;
    color: #666;
    border-top: 1px solid #e0e0e0;
}

/* Form Grid Layout - 2 columns */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.form-full-width {
    grid-column: 1 / -1;
}

/* Responsive - Single column on mobile */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    main {
        padding: 20px;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .details-grid {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }
}