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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
}

.card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

h1 {
    color: #333;
    text-align: center;
    margin-bottom: 10px;
    font-size: 2.2rem;
    font-weight: 700;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.input-group {
    margin-bottom: 30px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
    font-size: 1.1rem;
}

.input-container {
    position: relative;
    display: flex;
    align-items: center;
}

.currency {
    position: absolute;
    left: 15px;
    color: #666;
    font-weight: 600;
    font-size: 1.1rem;
    z-index: 1;
}

input[type="number"] {
    width: 100%;
    padding: 15px 15px 15px 40px;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    background: #f8f9fa;
    transition: all 0.3s ease;
    outline: none;
}

input[type="number"]:focus {
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

input[type="number"]:invalid {
    border-color: #e74c3c;
    background: #fdf2f2;
}

.limit-text {
    margin-top: 5px;
    font-size: 0.9rem;
    color: #888;
    text-align: right;
}

.result-section {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 20px;
    margin: 30px 0;
    border: 1px solid #e1e5e9;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.result-item:last-child {
    margin-bottom: 0;
}

.result-label {
    font-weight: 600;
    color: #333;
    font-size: 1.1rem;
}

.result-value {
    font-weight: 700;
    color: #667eea;
    font-size: 1.3rem;
}

.info-section {
    text-align: center;
    margin-top: 20px;
}

.info-text {
    color: #666;
    font-size: 0.95rem;
    background: #e8f2ff;
    padding: 12px 20px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

/* Responsive design */
@media (max-width: 992px) {
    h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .input-group label {
        font-size: 1rem;
    }
    
    input[type="number"] {
        font-size: 1rem;
    }
    
    .result-label {
        font-size: 1rem;
    }
    
    .result-value {
        font-size: 1.2rem;
    }
}

@media (max-width: 768px) {
    .card {
        padding: 35px 25px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 0.95rem;
    }
    
    .input-group label {
        font-size: 0.95rem;
    }
    
    input[type="number"] {
        font-size: 0.95rem;
        padding: 13px 13px 13px 38px;
    }
    
    .currency {
        font-size: 1rem;
    }
    
    .limit-text {
        font-size: 0.85rem;
    }
    
    .result-label {
        font-size: 0.95rem;
    }
    
    .result-value {
        font-size: 1.1rem;
    }
    
    .info-text {
        font-size: 0.9rem;
    }
}

@media (max-width: 576px) {
    .card {
        padding: 30px 20px;
        margin: 10px;
    }
    
    h1 {
        font-size: 1.6rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .input-group {
        margin-bottom: 25px;
    }
    
    .input-group label {
        font-size: 0.9rem;
    }
    
    input[type="number"] {
        font-size: 0.9rem;
        padding: 12px 12px 12px 35px;
    }
    
    .currency {
        left: 12px;
        font-size: 0.9rem;
    }
    
    .limit-text {
        font-size: 0.8rem;
    }
    
    .result-section {
        padding: 15px;
        margin: 25px 0;
    }
    
    .result-label {
        font-size: 0.9rem;
    }
    
    .result-value {
        font-size: 1rem;
    }
    
    .info-text {
        font-size: 0.85rem;
        padding: 10px 15px;
    }
}

/* Animation for smooth transitions */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.6s ease-out;
}

/* Hover effects */
.input-group:hover input[type="number"] {
    border-color: #667eea;
}

.result-item:hover .result-value {
    color: #5a6fd8;
    transform: scale(1.05);
    transition: all 0.2s ease;
}