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

body {
    font-family: 'Inter', sans-serif;
    background: #f8f9fa;
    color: #333;
}

.background-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.min-vh-100 {
    min-height: 100vh;
}

.converter-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    width: 100%;
    max-width: 500px;
    overflow: hidden;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 40px 30px;
    text-align: center;
    color: white;
}

.card-header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 32px;
    font-weight: 700;
    margin: 0 0 10px 0;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 14px;
    font-weight: 500;
    opacity: 0.9;
    margin: 0;
}

.converter-form {
    padding: 30px;
}

.amount-section {
    margin-bottom: 30px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-wrapper {
    position: relative;
}

.amount-input {
    width: 100%;
    padding: 12px 40px 12px 16px;
    font-size: 18px;
    font-weight: 600;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    transition: all 0.3s ease;
    color: #333;
}

.amount-input:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.input-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    color: #667eea;
    font-weight: 700;
}

.currencies-section {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    margin-bottom: 30px;
}

.currency-selector {
    flex: 1;
}

.currency-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: #666;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.currency-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: #f8f9fa;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.currency-box:hover {
    border-color: #667eea;
    background: #f0f3ff;
}

.flag-icon {
    width: 32px;
    height: 24px;
    border-radius: 4px;
    object-fit: cover;
}

.currency-select {
    width: 100%;
    background: transparent;
    border: none;
    padding: 0;
    font-size: 14px;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    outline: none;
    font-family: 'Inter', sans-serif;
}

.currency-select option {
    padding: 10px;
    font-size: 14px;
}

.swap-button-container {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 0 6px 12px 6px;
}

.swap-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid #e0e0e0;
    background: white;
    color: #667eea;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

.swap-btn:hover {
    border-color: #667eea;
    background: #f0f3ff;
    transform: rotate(180deg);
}

.swap-btn:active {
    transform: rotate(180deg) scale(0.95);
}

.result-section {
    margin-bottom: 25px;
}

.result-box {
    background: linear-gradient(135deg, #f0f3ff 0%, #f5f7ff 100%);
    border: 2px solid #e8ecff;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
}

.result-label {
    font-size: 12px;
    font-weight: 600;
    color: #667eea;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.result-value {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin: 0;
}

.btn-convert {
    width: 100%;
    padding: 14px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-convert:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

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

.card-footer {
    padding: 20px 30px;
    background: #f8f9fa;
    border-top: 1px solid #e0e0e0;
    text-align: center;
}

.text-muted {
    font-size: 12px;
    color: #999;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 600px) {
    .converter-card {
        max-width: 100%;
        border-radius: 12px;
    }

    .card-header {
        padding: 30px 20px;
    }

    .card-header h1 {
        font-size: 24px;
    }

    .converter-form {
        padding: 20px;
    }

    .currencies-section {
        flex-wrap: wrap;
    }

    .swap-button-container {
        width: 100%;
        padding: 12px 0;
        margin: 0 -6px;
    }

    .swap-btn {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    .result-value {
        font-size: 22px;
    }
}

h1 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
}

h3 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
}