.ec-card {
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    max-width: 450px;
    margin: 0 auto;
    box-sizing: border-box;
}

.ec-title {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 700;
}

.ec-form-group {
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
}

.ec-form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.ec-select,
.ec-input {
    padding: 10px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1rem;
    background-color: #fff !important;
    color: #333333 !important;
    transition: border-color 0.15s ease-in-out;
    width: 100%;
    box-sizing: border-box;
}

.ec-select option {
    color: #333333 !important;
    background-color: #ffffff !important;
}

.ec-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #f9fafb;
    padding: 16px;
    border-radius: 8px;
    margin-top: 24px;
    border: 1px solid #f3f4f6;
}

.ec-total-label {
    font-weight: 600;
    font-size: 1rem;
}

.ec-total-value {
    font-size: 1.5rem;
    font-weight: 800;
}

.ec-action {
    margin-top: 20px;
}

.ec-btn {
    display: block;
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    text-align: center;
    color: #ffffff;
    font-weight: 600;
    text-decoration: none;
    transition: opacity 0.15s ease-in-out;
}

.ec-btn:hover {
    opacity: 0.9;
}