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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, #2c3e50, #4a6491);
    color: white;
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Main Content */
main {
    padding: 2rem 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    main {
        grid-template-columns: 2fr 1fr;
    }
}

/* Card Styles */
.calculator-card, .info-card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.calculator-card h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

input, select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus, select:focus {
    outline: none;
    border-color: #4a6491;
    box-shadow: 0 0 0 2px rgba(74, 100, 145, 0.2);
}

button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #2c3e50, #4a6491);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

button:active {
    transform: translateY(0);
}

/* Result Styles */
#result {
    margin-top: 2rem;
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.tax-amount {
    font-size: 2.5rem;
    font-weight: bold;
    color: #2c3e50;
    margin: 1rem 0;
}

.tax-breakdown {
    color: #666;
    font-size: 0.9rem;
}

.hidden {
    display: none;
}

/* Info Card Styles */
.info-card {
    background: linear-gradient(135deg, #2c3e50, #4a6491);
    color: white;
}

.info-card h3 {
    margin-bottom: 1rem;
}

.info-card ul {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.info-card li {
    margin-bottom: 0.5rem;
}

/* Footer Styles */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 767px) {
    header h1 {
        font-size: 2rem;
    }
    
    .calculator-card, .info-card {
        padding: 1.5rem;
    }
    
    .tax-amount {
        font-size: 2rem;
    }
}