:root {
    --primary: #4361ee;
    --secondary: #3f37c9;
    --accent: #4895ef;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4cc9f0;
    --warning: #f72585;
    --border-radius: 12px;
    --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    /* font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; */
}

body {
    background-color: #f5f7ff;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: 2.5rem;
    color:#09274b;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

header p {
    color: #666;
    font-size: 1.1rem;
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

@media (max-width: 768px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
}

.input-section, .result-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #09274b;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

input, select {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.checkbox-group {
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
}

.checkbox-group input {
    width: auto;
    margin-right: 0.5rem;
}

.btn {
    background-color: #09274b;
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    background-color: #d3a02b;
    transform: translateY(-2px);
}

.btn-block {
    display: block;
    width: 100%;
}

.result-card {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--box-shadow);
}

.result-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-value {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.result-details {
    margin-top: 1.5rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.detail-item:last-child {
    border-bottom: none;
}

.chart-container {
    height: 250px;
    margin-top: 1.5rem;
}

.tax-brackets {
    margin-top: 1.5rem;
}

.bracket-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.8rem;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.bracket-item.active {
    background: rgba(255, 255, 255, 0.3);
    font-weight: 500;
}

.tips-section {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--box-shadow);
    margin-top: 2rem;
}

.tip-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.tip-card h4 {
    color: #09274b;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hidden {
    display: none;
}

.tabs {
    display: flex;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #ddd;
}

.tab {
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    font-weight: 500;
}

.tab.active {
    border-bottom: 3px solid #09274b;
    color: #09274b;
}

.tab-content {
    display: none;
}

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

.tooltip {
    position: relative;
    display: inline-block;
    margin-left: 0.5rem;
    color: var(--accent);
    cursor: pointer;
}

.tooltip-text {
    visibility: hidden;
    width: 200px;
    background-color: #333;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 0.5rem;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    transition: opacity 0.3s;
    font-size: 0.9rem;
    font-weight: normal;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

footer {
    text-align: center;
    margin-top: 3rem;
    color: #666;
    font-size: 0.9rem;
}

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

.fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}